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• W2048471327 abstract "This work is devoted to the preparation of trans-[Re6S8(CN)4(OH)(H2O)]3− and trans-[Re6S8(CN)4(H2O)2]2− cluster complexes starting from trans-[Re6S8(CN)4(OH)2]4− and a study of their luminescence properties. The controlled separation of each species could be achieved by pH adjustment: pH > 10, 5.5 < pH < 9 and pH < 3.5 for the dihydroxo trans-[Re6S8(CN)4(OH)2]4−, aquahydroxo trans-[Re6S8(CN)4(OH)(H2O)]3− and the diaqua trans-[Re6S8(CN)4(H2O)2]2− complexes, respectively. The stepwise acid dissociation constants of trans-[Re6S8(CN)4(H2O)2]2− were determined to be pKa1 = 3.3 and pKa2 = 6.6. Five novel compounds built up from the title cluster units were isolated and characterized: (Bu4N)4[Re6S8(CN)4(OH)2]·Bu4NOH (1), (Ph4P)3[Re6S8(CN)4(OH)(H2O)]·3.5H2O (2), (Bu4N)3[Re6S8(CN)4(OH)(H2O)]·2H2O (3), (Bu4N)2K[Re6S8(CN)4(OH)(H2O)]·6H2O (4) and (Bu4N)2[Re6S8(CN)4(H2O)2] (5). Compounds 2, 3 and 4 were characterized by single-crystal X-ray diffraction analysis. For 2 and 3, it was found that the availability of the OH− and H2O ligands in the trans-positions of the complex [Re6S8(CN)4(OH)(H2O)]3− leads to the formation of H3O2- intercluster bridging groups through strong hydrogen bonding. The trans disposition of the H3O2- groups around Re6 enables the formation of polymeric linear chains of cluster complexes." @default.
• W2048471327 created "2016-06-24" @default.
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• W2048471327 date "2014-01-01" @default.
• W2048471327 modified "2023-09-23" @default.
• W2048471327 title "Controlled synthesis and luminescence properties of trans-[Re6S8(CN)4(OH)2−n(H2O)n]n−4 octahedral rhenium(III) cluster units (n=0, 1 or 2)" @default.
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• W2048471327 doi "https://doi.org/10.1016/j.poly.2013.09.015" @default.
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