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Crystal Structure and Surface Photovoltage Properties of Mn II Coordination Supramolecules

2007; Wiley; Volume: 2007; Issue: 24 Linguagem: Inglês

10.1002/ejic.200700202

1099-0682

Li‐Ping Sun, Shu‐Yun Niu, Jing Jin, Li Zhang,

Porphyrin and Phthalocyanine Chemistry

Abstract Three Mn II coordination supramolecular complexes [Mn(pdc)(H 2 O)] n 1 , {[Mn(pdc) (phen)(H 2 O)] · 3H 2 O} n 2 , and {[Mn(cyan) 2 (H 2 O) 4 ] · 2HCl · 2(Hcyan)} 3 (H 2 pdc = pyridine‐2,3‐dicarboxylic acid, Hcyan = cyanuric acid, phen = 1,10‐phenanthroline) were hydrothermally synthesized and their structures determined by single‐crystal X‐ray diffraction. The pdc group in complex 1 bridges the Mn II ions to form an infinite 3D structure. In complex 2 , the Mn II ion is bridged to a 1D infinite chain by pdc groups and the chain is further connected to a 2D structure by hydrogen bonds. The 3D structure of complex 3 is formed by hydrogen bonds and O ··· Cl weak interactions. Surface photovoltage spectroscopy (SPS) of complexes 1 – 3 indicate that they all possess positive SPV response in the range of 300–800 nm and show p ‐type semiconductor characteristic. The intensities of the SPV responses are obviously different, and this can mainly be attributed to the differences in their structures. Field‐induced surface photovoltage spectroscopy (FISPS) of complexes 1 – 3 confirms their p ‐type semiconductor characteristic.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)