A high-pressure single-crystal X-ray diffraction study of potassium guaninate hydrate, K+•C5H4N5O-•H2O

被引：2
|
作者：
Gaydamaka, Anna A. [1 ,2 ]
Rashchenko, Sergey, V [1 ,3 ]
Semerikova, Anna, I [1 ,3 ]
Smirnova, Ekaterina S. [4 ]
Ivanova, Anna G. [4 ]
Arkhipov, Sergey G. [1 ,2 ]
Zakharov, Boris A. [1 ,2 ]
Bogdanov, Nikita E. [1 ,2 ]
Boldyreva, Elena, V [1 ,2 ]
机构：
[1] Novosibirsk State Univ, Pirogova St 2, Novosibirsk 630090, Russia
[2] Boreskov Inst Catalysis SB Ras, Lavrentiev Ave 5, Novosibirsk 630090, Russia
[3] VS Sobolev Inst Geol & Mineral SB Ras, Koptyug Ave 3, Novosibirsk 630090, Russia
[4] FSRC Crystallog & Photon RAS, Leninskii Ave 59, Moscow 119333, Russia
来源：
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS | 2023年 / 79卷
关键词：
guanine; high pressure; XRD; strain anisotropy; nucleobase; intermolecular interactions; incommensurate modulation; CONDITIONS BEAMLINE P02.2; PHASE-TRANSITIONS; ALPHA-POLYMORPH; GAMMA-POLYMORPH; LATTICE STRAIN; STRUCTURAL DISTORTION; INCREASING PRESSURE; LOW-TEMPERATURES; KINETIC CONTROL; 100; K;
D O I：
10.1107/S2052520623008740
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The crystal structure of potassium guaninate hydrate, K+center dot C5H4N5O-center dot H2O, was studied in the pressure range of 1 atm to 7.3 GPa by single-crystal diffraction using synchrotron radiation and a laboratory X-ray diffraction source. Structural strain was compared to that of the same salt hydrate on cooling, and in 2Na(+)center dot C5H3N5O2-center dot 7H(2)O under hydrostatic compression and on cooling. A polymorphic transition into a new, incommensurately modulated, phase was observed at similar to 4-5 GPa. The transition was reversible with a hysteresis: the satellite reflections disappeared on decompression to similar to 1.4 GPa.
引用
收藏
页码：495 / 509
页数：15
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