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Low temperature FTIR spectroscopy and hydrogen bonding in cytosine polycrystals
Rozenberg, M.; Shoham, G.; Reva, I.; Fausto, R.The FTIR spectra of both the pure NH and isotopically substituted ND (<10% and >90% D) polycrystalline cytosine were recorded in the range 400–4000 cm−1 as a function of temperature (10–300 K). For the first time, uncoupled NH(D) stretching mode bands of amine and imine groups were observed in the spectra of isotopically diluted cytosine at low temperatures. These bands correspond to the three distinct H-bonds ...
Low temperature Fourier transform infrared spectra and hydrogen bonding in poly...
Rozenberg, M.; Shoham, G.; Reva, I.; Fausto, R.The FTIR spectra of pure NH and isotopically diluted (NH/ND and ND/NH) polycrystalline uracil and thymine were measured in the range 4000-400 cm-1 at temperatures from 300 to 10 K. For the first time, the essentially narrow bands corresponding to the uncoupled stretching ([nu]1) and out of plane bending ([nu]4) NH proton modes of uracil and thymine were observed in the solid phase. It was found that in the [nu]...
Low temperature FTIR spectroscopy and hydrogen bonding in cytosine polycrystals
Rozenberg, M.; Shoham, G.; Reva, I.; Fausto, R.The FTIR spectra of both the pure NH and isotopically substituted ND (<10% and>90% D) polycrystalline cytosine were recorded in the range 400-4000 cm-1 as a function of temperature (10-300 K). For the first time, uncoupled NH(D) stretching mode bands of amine and imine groups were observed in the spectra of isotopically diluted cytosine at low temperatures. These bands correspond to the three distinct H-bonds t...
Low-temperature Fourier transform infrared spectra and hydrogen bonding in poly...
Rozenberg, M.; Shoham, G.; Reva, I.; Fausto, R.The 400–4000 cm−1 FTIR spectra of pure NH and isotopically substituted (10 and 90% doped ND/NH) polycrystalline l-alanine were recorded in the temperature range 10–300 K. The observed temperature dependence and isotopic shifts behavior enabled to identify, in the spectra of the doped crystals, three well-separated bands ascribable to either the NH or ND stretching vibrations associated with the three different ...
Low-temperature Fourier transform infrared spectra and hydrogen bonding in poly...
Rozenberg, M.; Shoham, G.; Reva, I.; Fausto, R.The 400–4000 cm−1 FTIR spectra of pure NH and isotopically substituted (10 and 90% doped ND/NH) polycrystalline l-alanine were recorded in the temperature range 10–300 K. The observed temperature dependence and isotopic shifts behavior enabled to identify, in the spectra of the doped crystals, three well-separated bands ascribable to either the NH or ND stretching vibrations associated with the three different ...
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