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Papers by David Kanis
Applied Physics Letters, Apr 25, 1994
The dispersion of the second-order optical nonlinearity in chromophoric self-assembled stilbazoli... more The dispersion of the second-order optical nonlinearity in chromophoric self-assembled stilbazolium films has been characterized in detail as a function of fundamental wavelength from 800 to 1600 nm using an optical parametric amplifier-based measurement system. The second-harmonic generation (SHG) spectrum exhibits a distinctive two-photon resonance at ℏω=1.3 eV (960 nm). The maximum in the second-order susceptibility coincides with a low-energy
Inorg Chem, 1993
... Frederick D. Lewis,' Gwen D. Salvi, David R. Kanis, and Mark A. Ratner .... more ... Frederick D. Lewis,' Gwen D. Salvi, David R. Kanis, and Mark A. Ratner ... The ultraviolet spectra of Pd(acac)* (Figure 2) and Pt(acac)2 (Figure 3) were described as being a great deal richer than that of the other B-diketonate complexes and, therefore, fit into none of the above ...
Chemical Reviews, 1994
... Quantum chemical aspects. First Page; PDF Hi-Res PDF[7930 KB]. David R. Kanis, Mark A. Ratner... more ... Quantum chemical aspects. First Page; PDF Hi-Res PDF[7930 KB]. David R. Kanis, Mark A. Ratner, Tobin J. Marks. Chem. Rev. ... Related Content. Other ACS articles by these authors: David R. Kanis; Mark A. Ratner; Tobin J. Marks. Close Menu. JOURNALS. ...
J Am Chem Soc, 1992
ABSTRACT
ACS Symposium Series, 1999
Page 1. Chapter 12 Structural Characteristics of Self-Assembled Monolayers on a High-Tc Supercond... more Page 1. Chapter 12 Structural Characteristics of Self-Assembled Monolayers on a High-Tc Superconductor Probed by Reflection-Absorption Infrared Spectroscopy Jason E. Ritchie1, Cyndi A. Wells1, David R. Kanis2, and John T. McDevitt1,3 ...
The Journal of Physical Chemistry, 1995
Page 1. J. Phys. Chem. 1995,99, 11061-11066 11061 Continuous Symmetry Analysis of Hyperpolarizabi... more Page 1. J. Phys. Chem. 1995,99, 11061-11066 11061 Continuous Symmetry Analysis of Hyperpolarizabilities. Characterization of the Second-Order Nonlinear Optical Response of Distorted Benzene David R. Kanis, Jason S ...
MRS Proceedings, 1994
ABSTRACTAn attractive and challenging approach to the construction of robust, thin film materials... more ABSTRACTAn attractive and challenging approach to the construction of robust, thin film materials with large second-order optical nonlinearities is the covalent self-assembly of aligned arrays of high-β molecular chromophores into multilayer superlattices. In this paper, we describe the dispersion of second harmonic generation (SHG) in a self-assembled (SA) monolayer containing a stilbazolium chromophore. The frequency-dependent measurements were performed on 25 Å thick monolayers on glass using a tunable (0.4–2 μm) light source based on optical parametric amplification (OPA). The SHG spectrum contains a clear two-photon resonance at hω = 1.3eV. The maximum in the second-order susceptibility coincides with a low energy chromophore-centered charge-transfer excitation at 480 nm. The experimental SHG dispersion values compare favorably with theoretical results computed using a sum-over-states (SOS) formalism. However, the measured values exhibit a somewhat broader band response than th...
Journal of Chemistry and Biochemistry, 2014
Time dependent perturbation theory predicts no change in the electronic state probability amplitu... more Time dependent perturbation theory predicts no change in the electronic state probability amplitudes of molecules unless the energy of the applied electromagnetic field matches an electronic energy level difference. Therefore, microwaves should have no non-thermal effect on chemical reactions. However, at low frequencies the oscillating potentials are essentially classical and the relevant question is whether the electronic molecular states evolve adiabatically or non-adiabatically. Time varying potentials can mix excited states into the instantaneous adiabatic ground state as the expectation of the energy changes in response to the potential. This mixing yields a non-zero excited state pr o ba bi l i t y a m p l i t u d e s c n (t). Measurements of these excited states, for example, by reactant collisions, may collapse the instantaneous ground state wave function onto the excited state with a probability |cn (t)| 2 . This nonadiabatic probability o p e n s a new channel for chemical reactions in addition to the usual thermal A r r h e n i u s probability. The temperature dependence of the reaction rate from these two channels will exhibit the microwave effects primarily at low temperatures. At high temperatures the Arrhenius pr oba bili ti es w i l l dominate and the microwave effects may be negligible. Most precise laboratory a s s e s s m e n t s of non-thermal mi c r ow a v e effects appear to have been at high temperatures. Several experiments are reviewed and one is found to have a wide enough temperature range to exhibit the predicted f o r m . Our results also suggest that m i c r o w a v e couplings could induce reactions different from those weighted by the thermal probabilities .
Journal of the American Chemical Society, 1990
... Description of Quadratic Optical Nonlinearities for Transition-Metal Organometallic Chromopho... more ... Description of Quadratic Optical Nonlinearities for Transition-Metal Organometallic Chromophores Using an SCF-LCAO MECI Formalism David R. Kanis, Mark A. Ratner,* and Tobin J. Marks* Department of Chemistry and the Materials Research ... (e) Loew, G. H.: Herman, Z. S ...
Journal of the American Chemical Society, 1992
Page 1. 10338 J. Am. Chem. Soc. 1992, 114, 10338-10357 this we include in Figure 4 three Ni atoms... more Page 1. 10338 J. Am. Chem. Soc. 1992, 114, 10338-10357 this we include in Figure 4 three Ni atoms that are not in 1 but that would be present were the ideal hcp Ni crystal to continue16 We conclude that the interface between ...
Journal of the American Chemical Society, 1994
![Research paper thumbnail of A comparative theoretical analysis of the physicochemically dissimilar tetrathiolate- and oxalate-bridged dititanium series, [(Cp2Ti)2(.mu.-C2X4)]n (where X = S, n = 0, 1-, 2-; X = O, n = 0, 2+): an explanation of electron delocalization from the metal centers upon replacement of the oxalate liga...](https://attachments.academia-assets.com/66736744/thumbnails/1.jpg)
](Journal of the American Chemical Society, 1991
A Comparative Theoretical Analysis of the Physicochemically Dissimilar Tetrathiolate-and Oxalate-... more A Comparative Theoretical Analysis of the Physicochemically Dissimilar Tetrathiolate-and Oxalate-Bridged Dititanium Series, [ ( C P~T~)~(~-C~X~) ]~ (Where X = S, n = 0, 1-, 2-; X = 0, n = 0, 2+): An Explanation of Electron Delocalization from the Metal Centers Upon Replacement of the Oxalate Ligand with the Tetrathiooxalate Ligand Abstract: Although electronically equivalent with the oxalate-bridge ( C P~T~)~( W -C~O~)
Journal of the American Chemical Society, 1998
... Jason E. Ritchie, † Cyndi A. Wells, † Ji-Ping Zhou, † Jianai Zhao, † John T. McDevitt,* † Car... more ... Jason E. Ritchie, † Cyndi A. Wells, † Ji-Ping Zhou, † Jianai Zhao, † John T. McDevitt,* † Carl R. Ankrum, ‡ Luckner Jean, ‡ and David R. Kanis* ‡. Contribution from the Department of Chemistry and Biochemistry, The University ...
International Journal of Quantum Chemistry, 1992
ABSTRACT
Inorganic Chemistry, 1993
... Frederick D. Lewis,' Gwen D. Salvi, David R. Kanis, and Mark A. Ratner .... more ... Frederick D. Lewis,' Gwen D. Salvi, David R. Kanis, and Mark A. Ratner ... The ultraviolet spectra of Pd(acac)* (Figure 2) and Pt(acac)2 (Figure 3) were described as being a great deal richer than that of the other B-diketonate complexes and, therefore, fit into none of the above ...
Applied Physics Letters, Apr 25, 1994
The dispersion of the second-order optical nonlinearity in chromophoric self-assembled stilbazoli... more The dispersion of the second-order optical nonlinearity in chromophoric self-assembled stilbazolium films has been characterized in detail as a function of fundamental wavelength from 800 to 1600 nm using an optical parametric amplifier-based measurement system. The second-harmonic generation (SHG) spectrum exhibits a distinctive two-photon resonance at ℏω=1.3 eV (960 nm). The maximum in the second-order susceptibility coincides with a low-energy
Inorg Chem, 1993
... Frederick D. Lewis,' Gwen D. Salvi, David R. Kanis, and Mark A. Ratner .... more ... Frederick D. Lewis,' Gwen D. Salvi, David R. Kanis, and Mark A. Ratner ... The ultraviolet spectra of Pd(acac)* (Figure 2) and Pt(acac)2 (Figure 3) were described as being a great deal richer than that of the other B-diketonate complexes and, therefore, fit into none of the above ...
Chemical Reviews, 1994
... Quantum chemical aspects. First Page; PDF Hi-Res PDF[7930 KB]. David R. Kanis, Mark A. Ratner... more ... Quantum chemical aspects. First Page; PDF Hi-Res PDF[7930 KB]. David R. Kanis, Mark A. Ratner, Tobin J. Marks. Chem. Rev. ... Related Content. Other ACS articles by these authors: David R. Kanis; Mark A. Ratner; Tobin J. Marks. Close Menu. JOURNALS. ...
J Am Chem Soc, 1992
ABSTRACT
ACS Symposium Series, 1999
Page 1. Chapter 12 Structural Characteristics of Self-Assembled Monolayers on a High-Tc Supercond... more Page 1. Chapter 12 Structural Characteristics of Self-Assembled Monolayers on a High-Tc Superconductor Probed by Reflection-Absorption Infrared Spectroscopy Jason E. Ritchie1, Cyndi A. Wells1, David R. Kanis2, and John T. McDevitt1,3 ...
The Journal of Physical Chemistry, 1995
Page 1. J. Phys. Chem. 1995,99, 11061-11066 11061 Continuous Symmetry Analysis of Hyperpolarizabi... more Page 1. J. Phys. Chem. 1995,99, 11061-11066 11061 Continuous Symmetry Analysis of Hyperpolarizabilities. Characterization of the Second-Order Nonlinear Optical Response of Distorted Benzene David R. Kanis, Jason S ...
MRS Proceedings, 1994
ABSTRACTAn attractive and challenging approach to the construction of robust, thin film materials... more ABSTRACTAn attractive and challenging approach to the construction of robust, thin film materials with large second-order optical nonlinearities is the covalent self-assembly of aligned arrays of high-β molecular chromophores into multilayer superlattices. In this paper, we describe the dispersion of second harmonic generation (SHG) in a self-assembled (SA) monolayer containing a stilbazolium chromophore. The frequency-dependent measurements were performed on 25 Å thick monolayers on glass using a tunable (0.4–2 μm) light source based on optical parametric amplification (OPA). The SHG spectrum contains a clear two-photon resonance at hω = 1.3eV. The maximum in the second-order susceptibility coincides with a low energy chromophore-centered charge-transfer excitation at 480 nm. The experimental SHG dispersion values compare favorably with theoretical results computed using a sum-over-states (SOS) formalism. However, the measured values exhibit a somewhat broader band response than th...
Journal of Chemistry and Biochemistry, 2014
Time dependent perturbation theory predicts no change in the electronic state probability amplitu... more Time dependent perturbation theory predicts no change in the electronic state probability amplitudes of molecules unless the energy of the applied electromagnetic field matches an electronic energy level difference. Therefore, microwaves should have no non-thermal effect on chemical reactions. However, at low frequencies the oscillating potentials are essentially classical and the relevant question is whether the electronic molecular states evolve adiabatically or non-adiabatically. Time varying potentials can mix excited states into the instantaneous adiabatic ground state as the expectation of the energy changes in response to the potential. This mixing yields a non-zero excited state pr o ba bi l i t y a m p l i t u d e s c n (t). Measurements of these excited states, for example, by reactant collisions, may collapse the instantaneous ground state wave function onto the excited state with a probability |cn (t)| 2 . This nonadiabatic probability o p e n s a new channel for chemical reactions in addition to the usual thermal A r r h e n i u s probability. The temperature dependence of the reaction rate from these two channels will exhibit the microwave effects primarily at low temperatures. At high temperatures the Arrhenius pr oba bili ti es w i l l dominate and the microwave effects may be negligible. Most precise laboratory a s s e s s m e n t s of non-thermal mi c r ow a v e effects appear to have been at high temperatures. Several experiments are reviewed and one is found to have a wide enough temperature range to exhibit the predicted f o r m . Our results also suggest that m i c r o w a v e couplings could induce reactions different from those weighted by the thermal probabilities .
Journal of the American Chemical Society, 1990
... Description of Quadratic Optical Nonlinearities for Transition-Metal Organometallic Chromopho... more ... Description of Quadratic Optical Nonlinearities for Transition-Metal Organometallic Chromophores Using an SCF-LCAO MECI Formalism David R. Kanis, Mark A. Ratner,* and Tobin J. Marks* Department of Chemistry and the Materials Research ... (e) Loew, G. H.: Herman, Z. S ...
Journal of the American Chemical Society, 1992
Page 1. 10338 J. Am. Chem. Soc. 1992, 114, 10338-10357 this we include in Figure 4 three Ni atoms... more Page 1. 10338 J. Am. Chem. Soc. 1992, 114, 10338-10357 this we include in Figure 4 three Ni atoms that are not in 1 but that would be present were the ideal hcp Ni crystal to continue16 We conclude that the interface between ...
Journal of the American Chemical Society, 1994
Journal of the American Chemical Society, 1991
A Comparative Theoretical Analysis of the Physicochemically Dissimilar Tetrathiolate-and Oxalate-... more A Comparative Theoretical Analysis of the Physicochemically Dissimilar Tetrathiolate-and Oxalate-Bridged Dititanium Series, [ ( C P~T~)~(~-C~X~) ]~ (Where X = S, n = 0, 1-, 2-; X = 0, n = 0, 2+): An Explanation of Electron Delocalization from the Metal Centers Upon Replacement of the Oxalate Ligand with the Tetrathiooxalate Ligand Abstract: Although electronically equivalent with the oxalate-bridge ( C P~T~)~( W -C~O~)
Journal of the American Chemical Society, 1998
... Jason E. Ritchie, † Cyndi A. Wells, † Ji-Ping Zhou, † Jianai Zhao, † John T. McDevitt,* † Car... more ... Jason E. Ritchie, † Cyndi A. Wells, † Ji-Ping Zhou, † Jianai Zhao, † John T. McDevitt,* † Carl R. Ankrum, ‡ Luckner Jean, ‡ and David R. Kanis* ‡. Contribution from the Department of Chemistry and Biochemistry, The University ...
International Journal of Quantum Chemistry, 1992
ABSTRACT
Inorganic Chemistry, 1993
... Frederick D. Lewis,' Gwen D. Salvi, David R. Kanis, and Mark A. Ratner .... more ... Frederick D. Lewis,' Gwen D. Salvi, David R. Kanis, and Mark A. Ratner ... The ultraviolet spectra of Pd(acac)* (Figure 2) and Pt(acac)2 (Figure 3) were described as being a great deal richer than that of the other B-diketonate complexes and, therefore, fit into none of the above ...