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Expanding the Pyridine-Formic Acid Cocrystal Landscape under Extreme Conditions

机译:在极端条件下扩大吡啶-甲酸共晶景观

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摘要

Pyridine and formic acid have been crystallized at differing ratios by both cryocrystallization and compression in a diamond anvil cell. Mixtures of the liquids in 1:1, 1:2, and 1:4 ratios all crystallize at high pressure, while only the 1:1 and 1:4 compositions were crystallized by in situ low temperature capillary crystallization. The 1:2 structure crystallized by high pressure is a previously unknown cocrystal of pyridine-formic acid. For the 1:4 mixture, a new polymorph has been identified at a pressure of 14.2 kbar with a distinctly different structure and bonding pattern to that of the previously reported low temperature form.
机译:吡啶和甲酸已通过在金刚石砧座中冷冻结晶和压缩而以不同的比率结晶。比例为1:1、1:2和1:4的液体混合物均在高压下结晶,而仅1:1和1:4的组合物通过原位低温毛细管结晶而结晶。通过高压结晶的1:2结构是吡啶甲酸的先前未知的共晶体。对于1:4的混合物,已在14.2 kbar的压力下鉴定出一种新的多晶型物,其结构和键合模式与先前报道的低温形式明显不同。

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