Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Towards an understanding of crystallization from solution. DFT studies of multi-component serotonin crystals. / Rychkov, Denis A.; Hunter, Steven; Kovalskii, Viktor Yu и др.
в: Computational and Theoretical Chemistry, Том 1088, 15.07.2016, стр. 52-61.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Towards an understanding of crystallization from solution. DFT studies of multi-component serotonin crystals
AU - Rychkov, Denis A.
AU - Hunter, Steven
AU - Kovalskii, Viktor Yu
AU - Lomzov, Alexander A.
AU - Pulham, Colin R.
AU - Boldyreva, Elena V.
PY - 2016/7/15
Y1 - 2016/7/15
N2 - A potential energy surface (PES) has been calculated for the protonated serotonin (5-HT) molecule in aqueous media. Three pairs of symmetrically equivalent minima were located using fully relaxed optimization at B3LYP/6-31G(d,p) level of theory. Insensitivity to basis set was verified over a range of different functionals and levels of theory. All 9 transition structures were found using the QST3 method with ansatz structures taken directly from the result of the calculated PES. Energies associated with conformational changes of protonated 5-HT in aqueous media were calculated and found to vary between 6 and 23 kJ mol-1. Lattice energies of serotonin picrate monohydrate and serotonin adipate were calculated as -741.7 and -716.9 kJ mol-1, respectively, and compared to conformational energies to consider the relative importance of each interaction type. The study contributes to achieving better insight into the importance of molecular conformations in solution as a precursor for the formation of the final crystal structure.
AB - A potential energy surface (PES) has been calculated for the protonated serotonin (5-HT) molecule in aqueous media. Three pairs of symmetrically equivalent minima were located using fully relaxed optimization at B3LYP/6-31G(d,p) level of theory. Insensitivity to basis set was verified over a range of different functionals and levels of theory. All 9 transition structures were found using the QST3 method with ansatz structures taken directly from the result of the calculated PES. Energies associated with conformational changes of protonated 5-HT in aqueous media were calculated and found to vary between 6 and 23 kJ mol-1. Lattice energies of serotonin picrate monohydrate and serotonin adipate were calculated as -741.7 and -716.9 kJ mol-1, respectively, and compared to conformational energies to consider the relative importance of each interaction type. The study contributes to achieving better insight into the importance of molecular conformations in solution as a precursor for the formation of the final crystal structure.
KW - 5-HT
KW - Crystallization mechanism
KW - DFT
KW - Potential energy surface
KW - Serotonin
KW - Transition states
UR - http://www.scopus.com/inward/record.url?scp=84969262529&partnerID=8YFLogxK
U2 - 10.1016/j.comptc.2016.04.027
DO - 10.1016/j.comptc.2016.04.027
M3 - Article
AN - SCOPUS:84969262529
VL - 1088
SP - 52
EP - 61
JO - Computational and Theoretical Chemistry
JF - Computational and Theoretical Chemistry
SN - 2210-271X
ER -
ID: 22580088