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发布时间：2019-03-09

论文类型：期刊论文

发表时间：2012-12-01

发表刊物：ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE

收录刊物：SCIE、Scopus

卷号：638

期号：15,SI

页面范围：2503-2507

ISSN号：0044-2313

关键字：Chalcogenides; Copper-rich framework; Selenoarsenates; Icosahedral clusters

摘要：Three copper-rich framework selenoarsenates, (H2en)1.5[Cu8(mu 8-Se)(AsSe4)6/2] (1), (H2dap)1.5[Cu8(mu 8-Se)(AsSe4)6/2] (2), and Na2(H2dap)0.5[Cu8(mu 8-Se)(AsSe4)6/2] (3), were synthesized under solvothermal conditions. These three compounds are isostructural and contain a 3D Cu-As-Se framework constructed from novel icosahedral Cu8Se13 clusters linked by As5+, with counterions located in the cavities. The icosahedral Cu8Se13 clusters represent the first icosahedral Cu-Se unit found in 3D framework chalcogenides, and contain an unusual mu 8-cubic bridging Se2 ion at the core site. The covalent 3D Cu-As-Se framework is rigid and not sensitive to the shape and charge density of counterions.