Solvothermal synthesis, structure and physical properties of   Cs[Cr(en)(2)MSe4] (M = Ge, Sn) with [MSe4](4-) tetrahedra as chelating   ligand

doi:10.1039/c6dt00233a

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	Solvothermal synthesis, structure and physical properties of Cs[Cr(en)(2)MSe4] (M = Ge, Sn) with [MSe4](4-) tetrahedra as chelating ligand
	Wang, Yingqi ; Wang, Ruiqi ; Liu, Qinglong ; Lai, Xiaofang ; Zhang, Xian ; Chen, Haijie ; Zheng, Chong ; Lin, Jianhua ; Huang, Fuqiang
刊名	DALTON TRANSACTIONS
	2016
关键词	OPEN-FRAMEWORK CHALCOGENIDES LAYERED METAL SULFIDES MAGNETOCALORIC MATERIALS CRYSTAL-STRUCTURE SOLAR-CELLS CLUSTERS PEROVSKITES CHEMISTRY CAPTURE URANIUM
DOI	10.1039/c6dt00233a
英文摘要	Two chromium chalcogenide Cs[Cr(en)(2)GeSe4] (1) and Cs[Cr(en)(2)SnSe4] (2) have been synthesized by a solvothermal method. Both compounds crystallize in the monoclinic space group P2(1)/n. The structures of the two compounds are characterized by isolated [Cr(en)(2)MSe4](-)clusters separated by Cs+ ions. The optical properties of the two compounds were measured which indicate a similar band gap of 1.58 eV. DFT calculations demonstrated that the valance band maximum (VBM) consist of Cr 3d orbitals and Se 4p orbitals while the conductive band minimum (CBM) are composed of Cr 3d orbitals for both compounds, which explains their similar optical band gap energies. Both compounds possess paramagnetic behaviors with the effective magnetic moment of 3.97 mu B for Cs[Cr(en)(2)GeSe4] and 3.91 mu B for Cs[Cr(en)(2)SnSe4], respectively. Field-dependent magnetization measurements demonstrated their potential as magnetocaloric materials, with the magnetic entropy change of 11.6 J (kg K)(-1) for Cs[Cr(en)(2)GeSe4], and 14.2 J (kg K)(-1) for Cs[Cr(en)(2)SnSe4].; 863 Program of China [2011AA050505]; NSF of China [91122034, 51125006, 51121064, 61376056, 51402341]; CAS/SAFEA International Partnership Program for Creative Research Teams; Chinese Academy of Sciences [KJCX2-EW-W11, KGZD-EW-303, XDB04040200]; SCI(E); EI; PubMed; ARTICLE; czheng@niu.edu; huangfq@pku.edu.cn; 22; 9097-9102; 45
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/433788]
专题	化学与分子工程学院工学院
推荐引用方式 GB/T 7714	Wang, Yingqi,Wang, Ruiqi,Liu, Qinglong,et al. Solvothermal synthesis, structure and physical properties of Cs[Cr(en)(2)MSe4] (M = Ge, Sn) with [MSe4](4-) tetrahedra as chelating ligand[J]. DALTON TRANSACTIONS,2016.
APA	Wang, Yingqi.,Wang, Ruiqi.,Liu, Qinglong.,Lai, Xiaofang.,Zhang, Xian.,...&Huang, Fuqiang.(2016).Solvothermal synthesis, structure and physical properties of Cs[Cr(en)(2)MSe4] (M = Ge, Sn) with [MSe4](4-) tetrahedra as chelating ligand.DALTON TRANSACTIONS.
MLA	Wang, Yingqi,et al."Solvothermal synthesis, structure and physical properties of Cs[Cr(en)(2)MSe4] (M = Ge, Sn) with [MSe4](4-) tetrahedra as chelating ligand".DALTON TRANSACTIONS (2016).