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Low-temperature heat capacity of diglycylglycine |
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| Authors: | V. A. Drebushchak Yulia A. Kovalevskaya I. E. Paukov Elena V. Boldyreva |
| Affiliation: | (1) Novosibirsk State University, Ul. Pirogova 2, Novosibirsk, 630090, Russia;(2) Institute of Geology and Mineralogy SB RAS, Pr. Ac. Koptyuga 3, Novosibirsk, 630090, Russia;(3) Institute of Inorganic Chemistry SB RAS, Pr. Ac. Lavrentieva 3, Novosibirsk, 630090, Russia;(4) Institute of Solid State Chemistry and Mechanochemistry SB RAS, Ul. Kutateladze 3, Novosibirsk, 630128, Russia |
| Abstract: | Heat capacity of tripeptide diglycylglycine was measured in a temperature range from 6.5 to 304 K. The results were compared with those for glycine and glycylglycine. Peptide bonding was found not to change C P(T) virtually above 70 K, where heat capacity does not obey the Debye model. Comparison with literature data allows one to expect a significant difference in the heat capacity for enantiomorph and racemic species of valine and leucine, like it was found recently for D-and DL-serine. |
| Keywords: | adiabatic calorimetry diglycylglycine glycines heat capacity molecular crystals peptide bond |
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