Donor–Acceptor Conjugated Copolymers Containing Transition-Metal Complex: Intrachain Magnetic Exchange Interactions and Magneto-Optical Activity
Donor–Acceptor Conjugated Copolymers Containing Transition-Metal Complex: Intrachain Magnetic Exchange Interactions and Magneto-Optical Activity
复制标题
DOI：
10.1021/acs.chemmater.2c01433
复制
发表时间：
2022-06
影响因子：
8.6
通讯作者：
Xunshan Liu;Jiaze Xie;J. Niklas;Emigdio E. Turner;Dafei Yuan;John S. Anderson;J. Rack;O. Poluektov;Luping Yu
中科院分区：
文献类型：
--
作者：
Xunshan Liu;Jiaze Xie;J. Niklas;Emigdio E. Turner;Dafei Yuan;John S. Anderson;J. Rack;O. Poluektov;Luping Yu
合成了一种含噻吩（给体）和Co（II）配合物（受体）的给体-受体共轭共聚物。通过SQUID和EPR测量对聚合物的磁性能进行了研究，结果表明邻近自旋中心与聚合物主链之间通过链内相互作用进行了反铁磁交换。这是首次将D-A共轭聚合物主链作为磁偶联的桥接配体，使得这类聚合物作为磁性材料具有很大的发展前景。此外，利用磁圆二色光谱对聚合物lcp1的磁光活性进行了表征。结果表明，该材料在590 nm处表现出较大的磁光旋转，峰值Verdet常数为2980°·T-1·m - 1。
A donor–acceptor conjugated copolymer containing thienothiophene (donor) units and Co(II) complexes (acceptor) has been synthesized and characterized. The studies of magnetic properties of the polymers by SQUID and EPR measurements showed antiferromagnetic exchange interaction between neighboring spin centers along with the polymer backbone through intrachain interactions. It is the first time that the D–A conjugated polymer backbone serves as bridging ligands for magnetic couplings, making these type of polymers promising as magnetic materials. Moreover, the magneto-optical activity of polymerLCP1was characterized using magnetic circular dichroism spectroscopy. It was found that the material exhibits a large magneto-optic rotation with a peak Verdet constant of 2980 deg·T–1·m–1at 590 nm.