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Konstantis F. Konidaris Giannis S. Papaefstathiou Guillem Aromi Simon J. Teat Evy Manessi-Zoupa Albert Escuer Spyros P. Perlepes 《Polyhedron》2009,28(9-10):1646-1651
The synthesis, single-crystal X-ray structure and magnetic properties of [Cu3L2Cl2(DMF)4]n (1), where L2? is the 2,3-dioxyquinoxalinate(-2) ligand, are reported. The complex was prepared by the reaction of CuCl2 and 1,4-dihydro-2,3-quinoxalinedione (H2L′) under basic conditions using either solvothermal or normal laboratory techniques. Compound 1 is a 3D coordination polymer with an (82.10)-a, lig (LiGe) topology, containing the ligand in a novel 3.1111 (Harris notation) coordination mode. Variable-temperature and variable-field magnetic studies reveal that the ligand L2? propagates weak antiferromagnetic exchange interactions through its “quinoxaline” part. IR data are discussed in terms of the structural features of 1 and the coordination mode of L2?. 相似文献
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Karotsis G Jones LF Papaefstathiou GS Collins A Parsons S Nguyen TD Evangelisti M Brechin EK 《Dalton transactions (Cambridge, England : 2003)》2008,(36):4917-4925
We report the synthesis of a series of mixed valence Mn(II/IV) tetranuclear clusters [Mn(II)(2)Mn(IV)(2)O(2)(heed)(2)(EtOH)(6)Br(2)]Br(2) (), [Mn(II)(2)Mn(IV)(2)O(2)(heed)(2)(H(2)O)(2)Cl(4)].2EtOH.H(2)O (.2EtOH.H(2)O), [Mn(II)(2)Mn(IV)(2)O(2)(heed)(2)(heedH(2))(2)](ClO(4))(4) (), [Mn(II)(2)Mn(IV)(2)O(2)(heed)(2)(MeCN)(2)(H(2)O)(2)(bpy)(2)](ClO(4))(4) () and [Mn(II)(2)Mn(IV)(2)O(2)(heed)(2)(bpy)(2)Br(4)].2MeOH (.2MeOH). Clusters are constructed from the tripodal ligand N,N-bis(2-hydroxyethyl)ethylene diamine (heedH(2)) and represent rare examples of tetranuclear Mn clusters possessing the linear trans zig-zag topology, being the first Mn(II/IV) mixed-valent clusters of this type. The molecular clusters can then be used as building blocks in tandem with the (linear) linker dicyanamide ([N(CN)(2)](-), dca(-)) for the formation of a novel extended network {[Mn(II)(2)Mn(IV)(2)O(2)(heed)(2)(H(2)O)(2)(MeOH)(2)(dca)(2)]Br(2)}(n) (), which exhibits a rare form of the 2D herring bone topology. 相似文献
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Turn‐On Luminescence Sensing and Real‐Time Detection of Traces of Water in Organic Solvents by a Flexible Metal–Organic Framework 下载免费PDF全文
Antigoni Douvali Dr. Athanassios C. Tsipis Dr. Svetlana V. Eliseeva Prof. Stéphane Petoud Dr. Giannis S. Papaefstathiou Dr. Christos D. Malliakas Dr. Ioannis Papadas Dr. Gerasimos S. Armatas Dr. Irene Margiolaki Prof. Mercouri G. Kanatzidis Dr. Theodore Lazarides Dr. Manolis J. Manos 《Angewandte Chemie (International ed. in English)》2015,54(5):1651-1656
The development of efficient sensors for the determination of the water content in organic solvents is highly desirable for a number of chemical industries. Presented herein is a Mg2+ metal–organic framework (MOF), which exhibits the remarkable capability to rapidly detect traces of water (0.05–5 % v/v) in various organic solvents through an unusual turn‐on luminescence sensing mechanism. The extraordinary sensitivity and fast response of this MOF for water, and its reusability make it one of the most powerful water sensors known. 相似文献