K. Gatterer - Academia.edu (original) (raw)
Papers by K. Gatterer
A method for calculating the most probable microsymmetry of the crystal field around the Kramers ... more A method for calculating the most probable microsymmetry of the crystal field around the Kramers ion neodymium (III) in seven different host crystals is presented. The starting data are taken from carefully interpreted optical spectra available in the literature, no further information being necessary. Firstly the crystal field parameters for various assumed test symmetries are chosen to give the best fit to the splitting of the ground state multiplet, then a “truncated” crystal field calculation involving only a limited number of Stark levels is performed and suggestions for the microsymmetry are given in terms of the standard deviation between the calculated and experimental Stark splittings. It must be emphasized that all the calculations can be done with a standard personal computer.
Performance Enhancement & Health
The Journal of Physical Chemistry
J. Phys. Chem. l!J94,98, 4673-4676 4613 Structure and Spectroscopy of Sodalite Containing MnOd-Io... more J. Phys. Chem. l!J94,98, 4673-4676 4613 Structure and Spectroscopy of Sodalite Containing MnOd-Ions V. I. Srdanov,**+ W. T. A. Harrison,* TE Gier,? ... A. Popitsch,s K. Gatterer,l D. Markgraber,l and HP Fritzerl Institute of Inorganic Chemistry, University of Graz, A-8010 Graz. ...
ChemInform, 2010
ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Journal of Applied Spectroscopy, 1995
Inorganic Chemistry, 2015
Complexes featuring lanthanide silicon bonds represent a research area still in its infancy. Here... more Complexes featuring lanthanide silicon bonds represent a research area still in its infancy. Herein, we report a series of Cp-free lanthanide (+II) complexes bearing σ-bonded silyl ligands. By reactions of LnI 2 (Ln = Yb, Eu, Sm) either with a 1,4-oligosilanyl dianion [K-Si(SiMe 3) 2 SiMe 2 SiMe 2 Si(SiMe 3) 2-K)] (1) or with 2 (Me 3 Si) 3 SiK (3) the corresponding neutral metallacyclopentasilanes ({Me 2 Si(Me 3 Si) 2 Si} 2)Ln• (THF) 4 (Ln = Yb (2a), Eu (2b), Sm (2c)), or the disilylated complexes ({Me 3 Si} 3 Si) 2 Ln•(THF) 3 (Ln = Yb (4a), Eu (4b), Sm (4c)), were selectively obtained. Complexes 2b, 2c, 4b, and 4c represent the first examples of structurally characterized Cp-free Eu and Sm complexes with silyl ligands. In both series, a linear correlation was observed between the Ln−Si bond lengths and the covalent radii of the corresponding lanthanide metals. Density functional theory calculations were also carried out for complexes 2a−c and 4a−c to elucidate the bonding situation between the Ln(+II) centers and Si.
Zeitschrift für Naturforschung A, 2000
A series of europium doped Na
High-T c Superconductors, 1988
Solid State Communications, 1986
Physical review. B, Condensed matter, 1996
A borosilicate glass of molar composition 0.01 Eu2O3• 0.9925 Na2O• 50B2O3• 25SiO2 has been studie... more A borosilicate glass of molar composition 0.01 Eu2O3• 0.9925 Na2O• 50B2O3• 25SiO2 has been studied through the optical spectroscopy of the Eu3 ion. Absorption and excitation spectra, fluorescence line narrowing, and time-resolved spectroscopy show that the impurity ions are accommodated in two different site distributions, one related to a silicate environment, and the other one related to a borate environment. These results have been corroborated by crystal-field calculations and comparison with the crystal-field parameters ...
Spectrochimica Acta Part A: Molecular Spectroscopy, 1993
... The band group on the low energy side consists of at least two spinforbidden electronic origi... more ... The band group on the low energy side consists of at least two spinforbidden electronic origins 4A28 ZEB, ZT,g(Oh) associated with some vibronic absorptions and will be discussed together with the single crystal absorption of the mercompound in the same region. ...
![Research paper thumbnail of Towards the chemical control of molecular packing: syntheses and crystal structures of three trans -[Ni L 4 (NCS) 2 ] complexes](https://attachments.academia-assets.com/74555874/thumbnails/1.jpg)
](Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 2014
Three nickel(II) isothiocyanato complexes of the formulatrans-[NiL4(NCS)2] (L= ethylisonicotinate... more Three nickel(II) isothiocyanato complexes of the formulatrans-[NiL4(NCS)2] (L= ethylisonicotinate, methylisonicotinate and 4-benzoylpyridine) have been prepared: [Ni(ethylisonicotinate)4(NCS)2] (I), [Ni(methylisonicotinate)4(NCS)2] (II) and [Ni(4-benzoylpyridine)4(NCS)2] (III). All three complexes are monomeric and have a distorted octahedral geometry around NiII. Despite their apparent molecular similarity, the crystal density of (III) (1.454 g cm−3) is significantly higher than that of (I) and (II) (both 1.408 g cm−3), suggesting that the molecular packing is most efficient in (III). A study of the molecular Hirshfeld surfaces, together with density functional theory (DFT) calculations, provide insights into the origin of the molecular packing features, and it is suggested that the greater crystal density of (III) results from smaller intermolecular electrostatic repulsions.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2001
Zinc tellurite glasses of compositions 19ZnO-80TeO 2-1Ln 2 O 3 with Ln= Eu, Er, Nd and Tm were pr... more Zinc tellurite glasses of compositions 19ZnO-80TeO 2-1Ln 2 O 3 with Ln= Eu, Er, Nd and Tm were prepared by melt quenching. The absorption spectra were measured and from the experimental oscillator strengths of the f f transitions the Judd-Ofelt parameters V u were obtained. The values of the V u parameters are in the range usually observed for oxide glasses. For Nd 3 + and Er 3 + , luminescence spectra in the near infrared were measured and the stimulated emission cross sections | p were evaluated for some laser transitions. The high values of | p , especially for Nd 3 + , make them possible candidates for optical applications. Fluorescence line narrowing (FLN) spectra of the Eu 3 + doped glass were measured at 20 K, and the energies of the Stark components of the 7 F 1 and 7 F 2 states were obtained. A crystal field analysis was carried out assuming a C 26 site symmetry. The behaviour of the crystal field ratios B 22 /B 20 and B 44 /B 40 agrees reasonably well with the values calculated using the geometric model proposed by Brecher and Riseberg. The crystal field strength at the Eu 3 + sites appears to be very low compared to other oxide glasses.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2001
Single crystals of YAl 3 (BO 3) 4 doped with 1 and 10% Pr 3 + were grown by spontaneous nucleatio... more Single crystals of YAl 3 (BO 3) 4 doped with 1 and 10% Pr 3 + were grown by spontaneous nucleation from a K 2 Mo 3 O 10 and B 2 O 3 flux. Polarised absorption and luminescence spectra in the visible, near infrared and infrared ranges were recorded at room and low temperatures on ground and polished samples of about 1 mm thickness. The microsymmetry of the Pr 3 + sites is D 3. The observed transitions were assigned and analysed on the basis of the selection rules for the D 3 point group. A set of free ion and crystal field parameters in reasonable agreement with the observed energy level structure is reported. The possible applications of the material in the field of optical devices are considered.
A method for calculating the most probable microsymmetry of the crystal field around the Kramers ... more A method for calculating the most probable microsymmetry of the crystal field around the Kramers ion neodymium (III) in seven different host crystals is presented. The starting data are taken from carefully interpreted optical spectra available in the literature, no further information being necessary. Firstly the crystal field parameters for various assumed test symmetries are chosen to give the best fit to the splitting of the ground state multiplet, then a “truncated” crystal field calculation involving only a limited number of Stark levels is performed and suggestions for the microsymmetry are given in terms of the standard deviation between the calculated and experimental Stark splittings. It must be emphasized that all the calculations can be done with a standard personal computer.
Performance Enhancement & Health
The Journal of Physical Chemistry
J. Phys. Chem. l!J94,98, 4673-4676 4613 Structure and Spectroscopy of Sodalite Containing MnOd-Io... more J. Phys. Chem. l!J94,98, 4673-4676 4613 Structure and Spectroscopy of Sodalite Containing MnOd-Ions V. I. Srdanov,**+ W. T. A. Harrison,* TE Gier,? ... A. Popitsch,s K. Gatterer,l D. Markgraber,l and HP Fritzerl Institute of Inorganic Chemistry, University of Graz, A-8010 Graz. ...
ChemInform, 2010
ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Journal of Applied Spectroscopy, 1995
Inorganic Chemistry, 2015
Complexes featuring lanthanide silicon bonds represent a research area still in its infancy. Here... more Complexes featuring lanthanide silicon bonds represent a research area still in its infancy. Herein, we report a series of Cp-free lanthanide (+II) complexes bearing σ-bonded silyl ligands. By reactions of LnI 2 (Ln = Yb, Eu, Sm) either with a 1,4-oligosilanyl dianion [K-Si(SiMe 3) 2 SiMe 2 SiMe 2 Si(SiMe 3) 2-K)] (1) or with 2 (Me 3 Si) 3 SiK (3) the corresponding neutral metallacyclopentasilanes ({Me 2 Si(Me 3 Si) 2 Si} 2)Ln• (THF) 4 (Ln = Yb (2a), Eu (2b), Sm (2c)), or the disilylated complexes ({Me 3 Si} 3 Si) 2 Ln•(THF) 3 (Ln = Yb (4a), Eu (4b), Sm (4c)), were selectively obtained. Complexes 2b, 2c, 4b, and 4c represent the first examples of structurally characterized Cp-free Eu and Sm complexes with silyl ligands. In both series, a linear correlation was observed between the Ln−Si bond lengths and the covalent radii of the corresponding lanthanide metals. Density functional theory calculations were also carried out for complexes 2a−c and 4a−c to elucidate the bonding situation between the Ln(+II) centers and Si.
Zeitschrift für Naturforschung A, 2000
A series of europium doped Na
High-T c Superconductors, 1988
Solid State Communications, 1986
Physical review. B, Condensed matter, 1996
A borosilicate glass of molar composition 0.01 Eu2O3• 0.9925 Na2O• 50B2O3• 25SiO2 has been studie... more A borosilicate glass of molar composition 0.01 Eu2O3• 0.9925 Na2O• 50B2O3• 25SiO2 has been studied through the optical spectroscopy of the Eu3 ion. Absorption and excitation spectra, fluorescence line narrowing, and time-resolved spectroscopy show that the impurity ions are accommodated in two different site distributions, one related to a silicate environment, and the other one related to a borate environment. These results have been corroborated by crystal-field calculations and comparison with the crystal-field parameters ...
Spectrochimica Acta Part A: Molecular Spectroscopy, 1993
... The band group on the low energy side consists of at least two spinforbidden electronic origi... more ... The band group on the low energy side consists of at least two spinforbidden electronic origins 4A28 ZEB, ZT,g(Oh) associated with some vibronic absorptions and will be discussed together with the single crystal absorption of the mercompound in the same region. ...
Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 2014
Three nickel(II) isothiocyanato complexes of the formulatrans-[NiL4(NCS)2] (L= ethylisonicotinate... more Three nickel(II) isothiocyanato complexes of the formulatrans-[NiL4(NCS)2] (L= ethylisonicotinate, methylisonicotinate and 4-benzoylpyridine) have been prepared: [Ni(ethylisonicotinate)4(NCS)2] (I), [Ni(methylisonicotinate)4(NCS)2] (II) and [Ni(4-benzoylpyridine)4(NCS)2] (III). All three complexes are monomeric and have a distorted octahedral geometry around NiII. Despite their apparent molecular similarity, the crystal density of (III) (1.454 g cm−3) is significantly higher than that of (I) and (II) (both 1.408 g cm−3), suggesting that the molecular packing is most efficient in (III). A study of the molecular Hirshfeld surfaces, together with density functional theory (DFT) calculations, provide insights into the origin of the molecular packing features, and it is suggested that the greater crystal density of (III) results from smaller intermolecular electrostatic repulsions.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2001
Zinc tellurite glasses of compositions 19ZnO-80TeO 2-1Ln 2 O 3 with Ln= Eu, Er, Nd and Tm were pr... more Zinc tellurite glasses of compositions 19ZnO-80TeO 2-1Ln 2 O 3 with Ln= Eu, Er, Nd and Tm were prepared by melt quenching. The absorption spectra were measured and from the experimental oscillator strengths of the f f transitions the Judd-Ofelt parameters V u were obtained. The values of the V u parameters are in the range usually observed for oxide glasses. For Nd 3 + and Er 3 + , luminescence spectra in the near infrared were measured and the stimulated emission cross sections | p were evaluated for some laser transitions. The high values of | p , especially for Nd 3 + , make them possible candidates for optical applications. Fluorescence line narrowing (FLN) spectra of the Eu 3 + doped glass were measured at 20 K, and the energies of the Stark components of the 7 F 1 and 7 F 2 states were obtained. A crystal field analysis was carried out assuming a C 26 site symmetry. The behaviour of the crystal field ratios B 22 /B 20 and B 44 /B 40 agrees reasonably well with the values calculated using the geometric model proposed by Brecher and Riseberg. The crystal field strength at the Eu 3 + sites appears to be very low compared to other oxide glasses.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2001
Single crystals of YAl 3 (BO 3) 4 doped with 1 and 10% Pr 3 + were grown by spontaneous nucleatio... more Single crystals of YAl 3 (BO 3) 4 doped with 1 and 10% Pr 3 + were grown by spontaneous nucleation from a K 2 Mo 3 O 10 and B 2 O 3 flux. Polarised absorption and luminescence spectra in the visible, near infrared and infrared ranges were recorded at room and low temperatures on ground and polished samples of about 1 mm thickness. The microsymmetry of the Pr 3 + sites is D 3. The observed transitions were assigned and analysed on the basis of the selection rules for the D 3 point group. A set of free ion and crystal field parameters in reasonable agreement with the observed energy level structure is reported. The possible applications of the material in the field of optical devices are considered.