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论文类型：期刊论文

发表时间：2018-01-01

发表刊物：Angewandte Chemie (International ed. in English)

收录刊物：PubMed、SCIE

卷号：57

期号：28

页面范围：8468-8472

ISSN号：1521-3773

关键字：coordination chemistry; iron; magnetic interactions; multifuntional materials; spin-crossover complexes

摘要：It is formidable to simultaneously tune magnetic and dielectric properties by external stimuli with rapid and sensitive response, which is crucial to monitor magnetic state via capacitive measurement. Herein, positive charged FeII ions were linked via negative charged [FeIII(Tp)(CN)₃] (Tp = hydrotris(pyrazolyl)borate) units to form a neutral chain. The spin-crossover (SCO) on FeII sites could be sensitively triggered via thermal treatment, light irradiation, and pressure. SCO switched spin state of FeII ions and antiferromagnetic interactions between FeIII and FeII ions, resulting in significant change in magnetization. Moreover, SCO induced rotation of negative charged [FeIII(Tp)(CN)₃] units, generating dielectric anomaly due to geometric change of charges distribution. This work provides a rational way to manipulate simultaneous variations in magnetic and dielectric properties utilizing SCO as an actuator to tune spin arrangement, magnetic coupling, and charge distribution. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.