Controlling Spin Switching with Anionic Supramolecular Frameworks,Chemistry of Materials

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Controlling Spin Switching with Anionic Supramolecular Frameworks
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-03-04 , DOI: 10.1021/acs.chemmater.0c00375
Michael C. Pfrunder _{1,

2} , Jacob J. Whittaker ₃ , Simon Parsons ₄ , Boujemaa Moubaraki ₅ , Keith S. Murray ₅ , Stephen A. Moggach ₄ , Neeraj Sharma ₆ , Aaron S. Micallef _{2,

7} , Jack K. Clegg ₃ , John C. McMurtrie _{1,

2}

Affiliation

Encasing the classic spin-crossover (SCO) complex cation [Co(terpy)₂]²⁺ in different anionic supramolecular frameworks modulates its SCO behavior, tuning both its T_1/2 (shift of up to 200 K) and the cooperativity of the system. The SCO behavior is influenced by the organization of the complex cations within supramolecular anionic frameworks comprising iodoperfluorobenzenes and iodide anions, with tighter packing of complexes leading to a more abrupt transition. This approach for the control of magnetic properties is applicable to any complex with suitable counterions and hence provides significant opportunity for further developing the properties of many such stimuli-responsive complexes, without requiring changes to their chemical structures. The magnetic properties of the materials presented herein are investigated through variable-temperature magnetic susceptibility measurements and variable-temperature and -pressure molecular structure studies.

中文翻译：

用阴离子超分子框架控制自旋开关

将经典的自旋交联（SCO）复合阳离子[Co（terpy）₂ ] ^2+包裹在不同的阴离子超分子框架中可调节其SCO行为，同时调节其T _1/2（最多移动200 K）和系统的协作性。SCO行为受超分子阴离子框架内包含碘全氟苯和碘化物阴离子的配位阳离子的组织影响，配合物的紧密堆积会导致更突然的跃迁。这种控制磁性的方法适用于具有合适抗衡离子的任何配合物，因此为进一步开发许多此类刺激响应性配合物的性质提供了重要机会，而无需改变其化学结构。本文介绍的材料的磁性能是通过可变温度磁化率测量以及可变温度和压力分子结构研究来研究的。

更新日期：2020-04-23

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