0000000001063171
AUTHOR
S. Kotila
Anomalous temperature dependence of the IR spectrum of polyalanine
Abstract We have studied the temperature dependence of the infrared spectra of acetanilide (ACN), tryptophan–(alanine) 15 , and tyrosine–(alanine) 15 . No sidebands of the amide-I vibration were observed in the polypeptides, but two anomalous sidebands of the NH stretch with a similar temperature dependence as that of the anomalous amide-I vibrational mode at 1650 cm −1 of crystalline ACN were detected. Fermi resonance combined with the appearance of a red-shifted sideband of NH stretch through coupling to lattice modes seems to explain this band structure. Observations are indicative of excitons that may occur in polypeptides as well as in single crystals of ACN.
CCDC 106636: Experimental Crystal Structure Determination
Related Article: S.Breidenbach, S.Ohren, R.Herbst-Irmer, S.Kotila, M.Nieger, F.Vogtle|1996|Liebigs Ann.||2115|doi:10.1002/jlac.199619961225
CCDC 103944: Experimental Crystal Structure Determination
Related Article: J.Ebels, R.Pietschnig, S.Kotila, A.Dombrowski, E.Niecke, M.Nieger, H.M.Schiffner|1998|Eur.J.Inorg.Chem.||331|doi:10.1002/(SICI)1099-0682(199803)1998:3<331::AID-EJIC331>3.0.CO;2-4
CCDC 104892: Experimental Crystal Structure Determination
Related Article: J.Ebels, R.Pietschnig, M.Nieger, E.Niecke, S.Kotila|1997|Heteroat.Chem.|8|521|doi:10.1002/(SICI)1098-1071(1997)8:63.0.CO;2-T
CCDC 106634: Experimental Crystal Structure Determination
Related Article: S.Breidenbach, S.Ohren, R.Herbst-Irmer, S.Kotila, M.Nieger, F.Vogtle|1996|Liebigs Ann.||2115|doi:10.1002/jlac.199619961225
CCDC 106637: Experimental Crystal Structure Determination
Related Article: S.Breidenbach, S.Ohren, R.Herbst-Irmer, S.Kotila, M.Nieger, F.Vogtle|1996|Liebigs Ann.||2115|doi:10.1002/jlac.199619961225
CCDC 104891: Experimental Crystal Structure Determination
Related Article: J.Ebels, R.Pietschnig, M.Nieger, E.Niecke, S.Kotila|1997|Heteroat.Chem.|8|521|doi:10.1002/(SICI)1098-1071(1997)8:63.0.CO;2-T
CCDC 103945: Experimental Crystal Structure Determination
Related Article: J.Ebels, R.Pietschnig, S.Kotila, A.Dombrowski, E.Niecke, M.Nieger, H.M.Schiffner|1998|Eur.J.Inorg.Chem.||331|doi:10.1002/(SICI)1099-0682(199803)1998:3<331::AID-EJIC331>3.0.CO;2-4
CCDC 104890: Experimental Crystal Structure Determination
Related Article: J.Ebels, R.Pietschnig, M.Nieger, E.Niecke, S.Kotila|1997|Heteroat.Chem.|8|521|doi:10.1002/(SICI)1098-1071(1997)8:63.0.CO;2-T
CCDC 106635: Experimental Crystal Structure Determination
Related Article: S.Breidenbach, S.Ohren, R.Herbst-Irmer, S.Kotila, M.Nieger, F.Vogtle|1996|Liebigs Ann.||2115|doi:10.1002/jlac.199619961225