A photoinert member of a photosensitive family. Structural studies of cobalt(III) nitropentammine malonate, [Co(NH₃)₅NO₂]C₃H₂O₄, under variable temperature and pressure help to explain the phenomenon.

IF 1.3 3区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Acta crystallographica Section B, Structural science, crystal engineering and materials Pub Date : 2025-10-01 Epub Date: 2025-09-02 DOI:10.1107/S2052520625006742

Polina P Kalinina, Boris A Zakharov, Elena V Boldyreva

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引用次数: 0

Abstract

A large family of photosensitive [Co(NH₃)₅NO₂]XY compounds is known to manifest mechanical effects accompanying intramolecular photochemical linkage nitro-nitrito isomerization. A new member of this family, a malonate, [Co(NH₃)₅NO₂]C₃H₂O₄, was synthesized for the first time and shown to be photoinert. The compound appears to be the first photoinert member of the family. The crystal structure was analysed both at ambient conditions and under variable temperature and pressure, and compared to previously known members of the family in order to rationalize such behaviour. A reversible isosymmetric single-crystal to single-crystal phase transition was observed at pressures between 2.4 and 3.0 GPa, and the crystal structure of a new high-pressure phase was solved and refined. Possible driving forces for the phase transition are discussed.

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光敏科的光惰性成员。对丙二酸钴（III）硝基五胺[Co(NH3)5NO2]C3H2O4在变温变压条件下的结构研究有助于解释这一现象。

已知一大家族的光敏[Co(NH3)5NO2]XY化合物在分子内光化学连锁硝基-硝基异构化过程中表现出机械效应。该家族的新成员丙二酸盐[Co(NH3)5NO2]C3H2O4首次被合成，并被证明具有光惰性。该化合物似乎是该家族的第一个光惰性成员。在环境条件和变温度、变压力下分析了晶体结构，并与以前已知的家族成员进行了比较，以便使这种行为合理化。在2.4 ~ 3.0 GPa的压力下，观察到可逆的等对称单晶向单晶的转变，求解并细化了新的高压相的晶体结构。讨论了相变的可能驱动力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta crystallographica Section B, Structural science, crystal engineering and materials CHEMISTRY, MULTIDISCIPLINARYCRYSTALLOGRAPH-CRYSTALLOGRAPHY

CiteScore

3.60

自引率

5.30%

发文量

期刊介绍： Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials publishes scientific articles related to the structural science of compounds and materials in the widest sense. Knowledge of the arrangements of atoms, including their temporal variations and dependencies on temperature and pressure, is often the key to understanding physical and chemical phenomena and is crucial for the design of new materials and supramolecular devices. Acta Crystallographica B is the forum for the publication of such contributions. Scientific developments based on experimental studies as well as those based on theoretical approaches, including crystal-structure prediction, structure-property relations and the use of databases of crystal structures, are published.