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来自内稳态的单离子磁体中的可逆溶剂化磁开关

Reversible solvatomagnetic switching in a single-ion magnet from an entatic state.

作者信息

Vallejo J, Pardo E, Viciano-Chumillas M, Castro I, Amorós P, Déniz M, Ruiz-Pérez C, Yuste-Vivas C, Krzystek J, Julve M, Lloret F, Cano J

机构信息

Institut de Ciència Molecular (ICMOL) , Universitat de València , 46980 Paterna , València , Spain . Email:

Institut de Ciència del Materials (ICMUV) , Universitat de València , 46980 Paterna , València , Spain.

出版信息

Chem Sci. 2017 May 1;8(5):3694-3702. doi: 10.1039/c6sc05188j. Epub 2017 Feb 13.

DOI:10.1039/c6sc05188j
PMID:28580105
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5437488/
Abstract

A vast impact on molecular nanoscience can be achieved using simple transition metal complexes as dynamic chemical systems to perform specific and selective tasks under the control of an external stimulus that switches "ON" and "OFF" their electronic properties. While the interest in single-ion magnets (SIMs) lies in their potential applications in information storage and quantum computing, the switching of their slow magnetic relaxation associated with host-guest processes is insufficiently explored. Herein, we report a unique example of a mononuclear cobalt(ii) complex in which geometrical constraints are the cause of easy and reversible water coordination and its release. As a result, a reversible and selective colour and SIM behaviour switch occurs between a "slow-relaxing" deep red anhydrous material (compound ) and its "fast-relaxing" orange hydrated form (compound ). The combination of this optical and magnetic switching in this new class of vapochromic and thermochromic SIMs offers fascinating possibilities for designing multifunctional molecular materials.

摘要

使用简单的过渡金属配合物作为动态化学系统,在外部刺激的控制下执行特定和选择性任务,该刺激会“开启”和“关闭”其电子特性,这对分子纳米科学可产生巨大影响。虽然单离子磁体(SIMs)的潜在应用在于信息存储和量子计算,但其与主客体过程相关的缓慢磁弛豫的切换尚未得到充分探索。在此,我们报道了一个单核钴(II)配合物的独特例子,其中几何约束是水易于可逆配位及其释放的原因。结果,在“缓慢弛豫”的深红色无水材料(化合物)与其“快速弛豫”的橙色水合形式(化合物)之间发生了可逆且选择性的颜色和SIM行为切换。这种新型的气致变色和热致变色SIMs中这种光学和磁学切换的结合,为设计多功能分子材料提供了迷人的可能性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/248a/5437488/214e43df0efe/c6sc05188j-f8.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/248a/5437488/214e43df0efe/c6sc05188j-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/248a/5437488/3244bb161b64/c6sc05188j-f1.jpg
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