V. Dananić - Academia.edu (original) (raw)

Papers by V. Dananić

Starting from the basic Landau model for the incommensurate-commensurate materials of the class I... more Starting from the basic Landau model for the incommensurate-commensurate materials of the class II, we derive the spectrum of collective modes for all (meta)stable states from the corresponding phase diagram. It is shown that all incommensurate states posses Goldstone modes with acoustic dispersions. The representation in terms of collective modes is also used in the calculation and discussion of static dielectric response for systems with the commensurate wave number in the center of the Brillouin zone.

American Journal of Physics, 1998

Chaotic dynamics of the two-body conservative system, which consists of a particle of mass m boun... more Chaotic dynamics of the two-body conservative system, which consists of a particle of mass m bouncing elastically on a horizontal plate of mass M supported by an elastic spring, is investigated. The system integrates the properties of coupled oscillators with those of the bouncing-ball and impact oscillator problems. Results obtained by varying the mass ratio M /m and the spring constant k in numerical computations are presented in the form of time-dependent diagrams and discrete maps. The rich variety of resulting chaotic behavior includes strange attractors with fractal structure, resonant islands, crisis, and intermittency route to chaos. The system has a remarkable didactic value as an example of chaotic behavior in simple systems close to everyday experience. The integrable limit M ϭ0 is appropriate for introducing the phase portraits and discussing the interrelationship between the shape of the potential energy curves and the resulting oscillatory motion.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2006

Density functional theory (DFT), using the B3-LYP/6-31G(d,p) method have been used to investigate... more Density functional theory (DFT), using the B3-LYP/6-31G(d,p) method have been used to investigate the conformation and vibrational spectra of aminopropylsilanetriol (APST) NH2CH2CH2CH2Si(OH)3. The potential function for CCCSi torsion gives rise to two distinct conformers trans and gauche. The predicted energy of the more stable trans conformer is 337 cm-1 less than the energy of gauche conformer. The calculated barriers to the conformation interchange are: 1095, 2845 and 438 cm-1 for the trans to gauche, gauche to gauche and gauche to trans conformers, respectively. For the trans conformer the potential energy curve for the Si(OH)3 groups torsion in APST has been calculated changing the HOSiC dihedral angle. The barrier for the internal rotation of 3065 cm-1 has been obtained. The optimized molecular structure of APST dimer calculated for trans conformer has a SiOSi angle of 143.2 degrees, and a SiOSi bond length of 0.164 nm. A complete vibrational assignment for both conformers as ...

Revista Mexicana de Física E

In this study we investigated whether combining external visualizations with extreme case reasoni... more In this study we investigated whether combining external visualizations with extreme case reasoning may facilitate developing of conceptual understanding about wave optics. For purposes of answering our research question we conducted a pretest-posttest quasi-experiment which included 179 students from a first year introductory physics course at the University of Zagreb, Croatia. Students who were guided through extreme case reasoning in their wave optics seminars significantly outperformed their peers who received conventional teaching treatment. Findings from our study suggest that combining external visualizations with extreme case reasoning facilitates development of visually rich internal representations which are a good basis for performing mental simulations about wave optics phenomena. In addition, it has been also found that many students use the “closer to the source implicates greater effect” p-prim when reasoning about certain relationships, such as the relationship betwe...

Vibrational Spectroscopy, 2013

ABSTRACT A series of poly(dimethylsiloxane)-zinc oxide (PDMS-ZnO) nanocomposites having different... more ABSTRACT A series of poly(dimethylsiloxane)-zinc oxide (PDMS-ZnO) nanocomposites having different concentrations of ZnO nanoparticles (0, 1, 5, 10 and 20 wt%) have been prepared. Raman and FTIR-ATR spectroscopic analysis was performed in order to determine the interaction between the ZnO nanoparticles and PDMS polymer matrix. Density functional theory (DFT) using the (B3-LYP)/6-311++G(2df,2p) method was used to investigate the vibrational spectra of PDMS. A complete vibrational assignment is supported by the normal coordinate analysis, calculated Raman activities as well as IR intensities.The presence of ZnO nanoparticles in PDMS gives rise to significant differences in relative intensities of the characteristic vibrational bands with respect to the cross-linked polymer. The changes in relative intensities of Raman bands, as well as swelling measurements, were used to explain the effect of ZnO nanoparticles on the cross-linked structure of PDMS nanocomposites. It is established that ZnO nanoparticles influence the cross-linking density of the polymer matrix.

Physical Review E, 1994

ABSTRACT The basic Landau model for the incommensurate-commensurate transition to the uniform or ... more ABSTRACT The basic Landau model for the incommensurate-commensurate transition to the uniform or dimerized uniaxial ordering is critically reexamined. The previous analyses identified only sinusoidal and homogeneous solutions as thermodynamically stable and proposed a simple phase diagram with the first-order phase transition between these configurations. By performing the numerical analysis of the free-energy and the Euler-Lagrange equation we show that the phase diagram is more complex. It also contains a set of metastable solutions present in the range of coexistence of homogeneous and sinusoidal solutions. These new configurations are periodic patterns of homogeneous domains connected by sinusoidal segments. They are Lyapunov unstable, very probably due to the nonintegrability of the free-energy functional. We also discuss some other mathematical aspects of the model and compare it with the essentially simpler sine-Gordon model for the transitions to the states with higher commensurabilities. We argue that the present results might be a basis for the explanation of phenomena such as thermal hystereses, cascades of phase transitions, and memory effects.

Water Research, 1997

Removal of some organic pollutants from aqueous solutions by reverse osmosis using commercial FT3... more Removal of some organic pollutants from aqueous solutions by reverse osmosis using commercial FT30 membranes of characterized porosities was investigated. The pore size distribution analysis and calculation of the effective number of pores have shown the presence of numerous narrow unimodally distributed pores in the upper selective membrane layer. The organic pollutant removal by reverse osmosis is governed mostly by mutual interactions between the membrane material, solute and water molecules.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2014

Raman spectrum of aminopropylsilanetriol (APST) in gas phase has been recorded at room temperatur... more Raman spectrum of aminopropylsilanetriol (APST) in gas phase has been recorded at room temperature in macro chamber utilizing two-mirror technique over the sample tube. Unlike predominantly trans molecular conformation in condensed phase, the spectra of vapor show that the molecules are solely in gauche conformation with intramolecular hydrogen bond N···HO which reduces the molecular energy in respect to trans conformation by 0.152 eV. The assignment of the molecular spectra based on the DFT calculation is presented. The strong vibrational bands at 354 cm(-1), 588 cm(-1) and 3022 cm(-1) are proposed for verifying the existence of the ring like, hydrogen bonded structure. Special attention was devoted to the high frequency region, where hydrogen bond vibrations are coupled to stretchings of amino and silanol groups.

Separation and Purification Technology, 2013

High affinity of non-ionized hydrophobic organics towards hydrophobic nanofiltration (NF) membran... more High affinity of non-ionized hydrophobic organics towards hydrophobic nanofiltration (NF) membranes is often the main cause for their poor removal by NF. Rejection of organics can be increased mostly by making membrane surface hydrophilic and less prone to adsorption. Although numerous studies reported benefits of such surface modifications, very few of them focused on revealing the mechanisms of increased rejection. The present paper aims at comparing measured rejections of various organic solutes of different hydrophilicity/hydrophobicity and sodium chloride on extremely thin NF film membrane, DowFilmTec NF270, before and after coating with poly(vinyl alcohol) (PVA). PVA coating increased the rejection of hydrophobic solutes from 5% to 30%, decreased rejection of hydrophilic solutes from 6% to 50% while the rejections of low interacting solutes, dioxane, and NaCl remained unchanged. Additionally, the rejections of organics of identical molecular mass and similar Stokes radii were compared and found to be governed by the solute/membrane energy of interaction, which correlated with corresponding log K ow values and dipole moments. The removal mechanism of NF270/PVA composite has been proposed based on the difference in measured rejections of solutes and estimated energy of interactions before and after modification.

Physical Review Letters, 1998

Reconsidering the variational procedure for uniaxial systems modeled by continuous free energy fu... more Reconsidering the variational procedure for uniaxial systems modeled by continuous free energy functionals, we derive new general conditions for thermodynamic extrema. The utility of these conditions is briefly illustrated on the models for the classes I and II of incommensurate-commensurate systems.

Physical Review D, 1987

ABSTRACT The momentum-transfer (Q) dependence of the electromagnetic form factor is calculated fo... more ABSTRACT The momentum-transfer (Q) dependence of the electromagnetic form factor is calculated for the charged-fermion--neutral-scalar system in a potential model. The magnetic moment has a major contribution similar to the static bag-model value. Two additional corrections have opposite signs. Their near cancellation is connected with the proper description of the photon vertex. The same description, together with the integration measure deduced from the quasipotential formalism, leads to a form factor which has as low rate of decrease with high-Q values as suggested by the experimental data. This investigation, based on an explicitly solvable model, might give some useful hints for the treatment of the more complex systems.

Physical Review A, 1992

ABSTRACT Considering the standard Landau model we demonstrate that the phase diagrams for the loc... more ABSTRACT Considering the standard Landau model we demonstrate that the phase diagrams for the lock-in to the uniform and dimerized ordering contain a class of periodic configurations. They are formed as sequences of local commensurate and incommensurate modulation. The simplest representatives are calculated numerically. Being stable in narrow ranges of the control parameters, these configurations might be the source of global hysteresis and memory effects frequently seen in particular systems.

Journal of Molecular Structure, 2007

In this work, we investigated IR and Raman spectra from 400-1800 cm ¡1 of aminopropylsiloxane (AP... more In this work, we investigated IR and Raman spectra from 400-1800 cm ¡1 of aminopropylsiloxane (APS) polymerized on PVC substrate at room temperature. Complete assignment of the vibrational spectra was carried out using density functional theory calculations with Becke's three-parameter exchange functional in combination with the Lee-Young-Parr correlation functional (B3-LYP) and standard 6-311++ G(d, p) basis set. The vibrational spectra were calculated for two diVerent conformations of silicooxygen rings: ladder structure and cubic structure. Comparative analysis of calculated and measured spectra reveals that ladder structure has been formed at the surface of PVC support.

Journal of Membrane Science, 1996

Good cellulose triacetate reverse osmosis membranes have been prepared by the phase separation te... more Good cellulose triacetate reverse osmosis membranes have been prepared by the phase separation technique. The membrane properties were influenced by the membrane casting dope composition, mostly by the dioxane/acetone ratio and the maleic acid content in the casting dope. The distinctive membrane performances were caused by different pore size distributions and various numbers of pores in the membranes skin. The improved pore size distribution analysis and the calculation of both the effective number of pores and the active part of the membranes surface area have shown a wide spectrum of the network pore sizes and usually one size group of bigger aggregate pores.

Chemical Engineering Journal, 2014

h i g h l i g h t s Cross-flow velocity significantly affects removal of organics. Sherwood relat... more h i g h l i g h t s Cross-flow velocity significantly affects removal of organics. Sherwood relation correctly estimates mass transfer at small solute fluxes. At high solute fluxes Schmidt number needs correction. Correction correlation is proposed for Schmidt number.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2006

Density functional theory (DFT), using the B3-LYP/6-31G(d,p) method have been used to investigate... more Density functional theory (DFT), using the B3-LYP/6-31G(d,p) method have been used to investigate the conformation and vibrational spectra of aminopropylsilanetriol (APST) NH2CH2CH2CH2Si(OH)3. The potential function for CCCSi torsion gives rise to two distinct conformers trans and gauche. The predicted energy of the more stable trans conformer is 337 cm-1 less than the energy of gauche conformer. The calculated barriers to the conformation interchange are: 1095, 2845 and 438 cm-1 for the trans to gauche, gauche to gauche and gauche to trans conformers, respectively. For the trans conformer the potential energy curve for the Si(OH)3 groups torsion in APST has been calculated changing the HOSiC dihedral angle. The barrier for the internal rotation of 3065 cm-1 has been obtained. The optimized molecular structure of APST dimer calculated for trans conformer has a SiOSi angle of 143.2 degrees, and a SiOSi bond length of 0.164 nm. A complete vibrational assignment for both conformers as well as for trans-dimer is supported by the normal coordinate analysis, calculated IR intensities as well as Raman activities. On the basis of the results, the vibrational spectra of APST aqueous solution and APST polymer have been analyzed. The average error between the observed and calculated frequencies is 14 cm-1.

Vibrational Spectroscopy, 2013

Starting from the basic Landau model for the incommensurate-commensurate materials of the class I... more Starting from the basic Landau model for the incommensurate-commensurate materials of the class II, we derive the spectrum of collective modes for all (meta)stable states from the corresponding phase diagram. It is shown that all incommensurate states posses Goldstone modes with acoustic dispersions. The representation in terms of collective modes is also used in the calculation and discussion of static dielectric response for systems with the commensurate wave number in the center of the Brillouin zone.

American Journal of Physics, 1998

Chaotic dynamics of the two-body conservative system, which consists of a particle of mass m boun... more Chaotic dynamics of the two-body conservative system, which consists of a particle of mass m bouncing elastically on a horizontal plate of mass M supported by an elastic spring, is investigated. The system integrates the properties of coupled oscillators with those of the bouncing-ball and impact oscillator problems. Results obtained by varying the mass ratio M /m and the spring constant k in numerical computations are presented in the form of time-dependent diagrams and discrete maps. The rich variety of resulting chaotic behavior includes strange attractors with fractal structure, resonant islands, crisis, and intermittency route to chaos. The system has a remarkable didactic value as an example of chaotic behavior in simple systems close to everyday experience. The integrable limit M ϭ0 is appropriate for introducing the phase portraits and discussing the interrelationship between the shape of the potential energy curves and the resulting oscillatory motion.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2006

Density functional theory (DFT), using the B3-LYP/6-31G(d,p) method have been used to investigate... more Density functional theory (DFT), using the B3-LYP/6-31G(d,p) method have been used to investigate the conformation and vibrational spectra of aminopropylsilanetriol (APST) NH2CH2CH2CH2Si(OH)3. The potential function for CCCSi torsion gives rise to two distinct conformers trans and gauche. The predicted energy of the more stable trans conformer is 337 cm-1 less than the energy of gauche conformer. The calculated barriers to the conformation interchange are: 1095, 2845 and 438 cm-1 for the trans to gauche, gauche to gauche and gauche to trans conformers, respectively. For the trans conformer the potential energy curve for the Si(OH)3 groups torsion in APST has been calculated changing the HOSiC dihedral angle. The barrier for the internal rotation of 3065 cm-1 has been obtained. The optimized molecular structure of APST dimer calculated for trans conformer has a SiOSi angle of 143.2 degrees, and a SiOSi bond length of 0.164 nm. A complete vibrational assignment for both conformers as ...

Revista Mexicana de Física E

In this study we investigated whether combining external visualizations with extreme case reasoni... more In this study we investigated whether combining external visualizations with extreme case reasoning may facilitate developing of conceptual understanding about wave optics. For purposes of answering our research question we conducted a pretest-posttest quasi-experiment which included 179 students from a first year introductory physics course at the University of Zagreb, Croatia. Students who were guided through extreme case reasoning in their wave optics seminars significantly outperformed their peers who received conventional teaching treatment. Findings from our study suggest that combining external visualizations with extreme case reasoning facilitates development of visually rich internal representations which are a good basis for performing mental simulations about wave optics phenomena. In addition, it has been also found that many students use the “closer to the source implicates greater effect” p-prim when reasoning about certain relationships, such as the relationship betwe...

Vibrational Spectroscopy, 2013

ABSTRACT A series of poly(dimethylsiloxane)-zinc oxide (PDMS-ZnO) nanocomposites having different... more ABSTRACT A series of poly(dimethylsiloxane)-zinc oxide (PDMS-ZnO) nanocomposites having different concentrations of ZnO nanoparticles (0, 1, 5, 10 and 20 wt%) have been prepared. Raman and FTIR-ATR spectroscopic analysis was performed in order to determine the interaction between the ZnO nanoparticles and PDMS polymer matrix. Density functional theory (DFT) using the (B3-LYP)/6-311++G(2df,2p) method was used to investigate the vibrational spectra of PDMS. A complete vibrational assignment is supported by the normal coordinate analysis, calculated Raman activities as well as IR intensities.The presence of ZnO nanoparticles in PDMS gives rise to significant differences in relative intensities of the characteristic vibrational bands with respect to the cross-linked polymer. The changes in relative intensities of Raman bands, as well as swelling measurements, were used to explain the effect of ZnO nanoparticles on the cross-linked structure of PDMS nanocomposites. It is established that ZnO nanoparticles influence the cross-linking density of the polymer matrix.

Physical Review E, 1994

ABSTRACT The basic Landau model for the incommensurate-commensurate transition to the uniform or ... more ABSTRACT The basic Landau model for the incommensurate-commensurate transition to the uniform or dimerized uniaxial ordering is critically reexamined. The previous analyses identified only sinusoidal and homogeneous solutions as thermodynamically stable and proposed a simple phase diagram with the first-order phase transition between these configurations. By performing the numerical analysis of the free-energy and the Euler-Lagrange equation we show that the phase diagram is more complex. It also contains a set of metastable solutions present in the range of coexistence of homogeneous and sinusoidal solutions. These new configurations are periodic patterns of homogeneous domains connected by sinusoidal segments. They are Lyapunov unstable, very probably due to the nonintegrability of the free-energy functional. We also discuss some other mathematical aspects of the model and compare it with the essentially simpler sine-Gordon model for the transitions to the states with higher commensurabilities. We argue that the present results might be a basis for the explanation of phenomena such as thermal hystereses, cascades of phase transitions, and memory effects.

Water Research, 1997

Removal of some organic pollutants from aqueous solutions by reverse osmosis using commercial FT3... more Removal of some organic pollutants from aqueous solutions by reverse osmosis using commercial FT30 membranes of characterized porosities was investigated. The pore size distribution analysis and calculation of the effective number of pores have shown the presence of numerous narrow unimodally distributed pores in the upper selective membrane layer. The organic pollutant removal by reverse osmosis is governed mostly by mutual interactions between the membrane material, solute and water molecules.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2014

Raman spectrum of aminopropylsilanetriol (APST) in gas phase has been recorded at room temperatur... more Raman spectrum of aminopropylsilanetriol (APST) in gas phase has been recorded at room temperature in macro chamber utilizing two-mirror technique over the sample tube. Unlike predominantly trans molecular conformation in condensed phase, the spectra of vapor show that the molecules are solely in gauche conformation with intramolecular hydrogen bond N···HO which reduces the molecular energy in respect to trans conformation by 0.152 eV. The assignment of the molecular spectra based on the DFT calculation is presented. The strong vibrational bands at 354 cm(-1), 588 cm(-1) and 3022 cm(-1) are proposed for verifying the existence of the ring like, hydrogen bonded structure. Special attention was devoted to the high frequency region, where hydrogen bond vibrations are coupled to stretchings of amino and silanol groups.

Separation and Purification Technology, 2013

High affinity of non-ionized hydrophobic organics towards hydrophobic nanofiltration (NF) membran... more High affinity of non-ionized hydrophobic organics towards hydrophobic nanofiltration (NF) membranes is often the main cause for their poor removal by NF. Rejection of organics can be increased mostly by making membrane surface hydrophilic and less prone to adsorption. Although numerous studies reported benefits of such surface modifications, very few of them focused on revealing the mechanisms of increased rejection. The present paper aims at comparing measured rejections of various organic solutes of different hydrophilicity/hydrophobicity and sodium chloride on extremely thin NF film membrane, DowFilmTec NF270, before and after coating with poly(vinyl alcohol) (PVA). PVA coating increased the rejection of hydrophobic solutes from 5% to 30%, decreased rejection of hydrophilic solutes from 6% to 50% while the rejections of low interacting solutes, dioxane, and NaCl remained unchanged. Additionally, the rejections of organics of identical molecular mass and similar Stokes radii were compared and found to be governed by the solute/membrane energy of interaction, which correlated with corresponding log K ow values and dipole moments. The removal mechanism of NF270/PVA composite has been proposed based on the difference in measured rejections of solutes and estimated energy of interactions before and after modification.

Physical Review Letters, 1998

Reconsidering the variational procedure for uniaxial systems modeled by continuous free energy fu... more Reconsidering the variational procedure for uniaxial systems modeled by continuous free energy functionals, we derive new general conditions for thermodynamic extrema. The utility of these conditions is briefly illustrated on the models for the classes I and II of incommensurate-commensurate systems.

Physical Review D, 1987

ABSTRACT The momentum-transfer (Q) dependence of the electromagnetic form factor is calculated fo... more ABSTRACT The momentum-transfer (Q) dependence of the electromagnetic form factor is calculated for the charged-fermion--neutral-scalar system in a potential model. The magnetic moment has a major contribution similar to the static bag-model value. Two additional corrections have opposite signs. Their near cancellation is connected with the proper description of the photon vertex. The same description, together with the integration measure deduced from the quasipotential formalism, leads to a form factor which has as low rate of decrease with high-Q values as suggested by the experimental data. This investigation, based on an explicitly solvable model, might give some useful hints for the treatment of the more complex systems.

Physical Review A, 1992

ABSTRACT Considering the standard Landau model we demonstrate that the phase diagrams for the loc... more ABSTRACT Considering the standard Landau model we demonstrate that the phase diagrams for the lock-in to the uniform and dimerized ordering contain a class of periodic configurations. They are formed as sequences of local commensurate and incommensurate modulation. The simplest representatives are calculated numerically. Being stable in narrow ranges of the control parameters, these configurations might be the source of global hysteresis and memory effects frequently seen in particular systems.

Journal of Molecular Structure, 2007

In this work, we investigated IR and Raman spectra from 400-1800 cm ¡1 of aminopropylsiloxane (AP... more In this work, we investigated IR and Raman spectra from 400-1800 cm ¡1 of aminopropylsiloxane (APS) polymerized on PVC substrate at room temperature. Complete assignment of the vibrational spectra was carried out using density functional theory calculations with Becke's three-parameter exchange functional in combination with the Lee-Young-Parr correlation functional (B3-LYP) and standard 6-311++ G(d, p) basis set. The vibrational spectra were calculated for two diVerent conformations of silicooxygen rings: ladder structure and cubic structure. Comparative analysis of calculated and measured spectra reveals that ladder structure has been formed at the surface of PVC support.

Journal of Membrane Science, 1996

Good cellulose triacetate reverse osmosis membranes have been prepared by the phase separation te... more Good cellulose triacetate reverse osmosis membranes have been prepared by the phase separation technique. The membrane properties were influenced by the membrane casting dope composition, mostly by the dioxane/acetone ratio and the maleic acid content in the casting dope. The distinctive membrane performances were caused by different pore size distributions and various numbers of pores in the membranes skin. The improved pore size distribution analysis and the calculation of both the effective number of pores and the active part of the membranes surface area have shown a wide spectrum of the network pore sizes and usually one size group of bigger aggregate pores.

Chemical Engineering Journal, 2014

h i g h l i g h t s Cross-flow velocity significantly affects removal of organics. Sherwood relat... more h i g h l i g h t s Cross-flow velocity significantly affects removal of organics. Sherwood relation correctly estimates mass transfer at small solute fluxes. At high solute fluxes Schmidt number needs correction. Correction correlation is proposed for Schmidt number.

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2006

Density functional theory (DFT), using the B3-LYP/6-31G(d,p) method have been used to investigate... more Density functional theory (DFT), using the B3-LYP/6-31G(d,p) method have been used to investigate the conformation and vibrational spectra of aminopropylsilanetriol (APST) NH2CH2CH2CH2Si(OH)3. The potential function for CCCSi torsion gives rise to two distinct conformers trans and gauche. The predicted energy of the more stable trans conformer is 337 cm-1 less than the energy of gauche conformer. The calculated barriers to the conformation interchange are: 1095, 2845 and 438 cm-1 for the trans to gauche, gauche to gauche and gauche to trans conformers, respectively. For the trans conformer the potential energy curve for the Si(OH)3 groups torsion in APST has been calculated changing the HOSiC dihedral angle. The barrier for the internal rotation of 3065 cm-1 has been obtained. The optimized molecular structure of APST dimer calculated for trans conformer has a SiOSi angle of 143.2 degrees, and a SiOSi bond length of 0.164 nm. A complete vibrational assignment for both conformers as well as for trans-dimer is supported by the normal coordinate analysis, calculated IR intensities as well as Raman activities. On the basis of the results, the vibrational spectra of APST aqueous solution and APST polymer have been analyzed. The average error between the observed and calculated frequencies is 14 cm-1.

Vibrational Spectroscopy, 2013