Yanjie Cui, Y. Xing, Guanghua Li
Sep 1, 2004
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Journal
Journal of Solid State Chemistry
Abstract
Two novel layered organic–inorganic hybrid materials M (phen)(H 2 O)(VO)(H 2 O)(HPO 4 ) 2 ( M =Ni, Co) have been synthesized hydrothermally, their crystal structures and variable temperature magnetic susceptibilities were determined. Being characterized by single-crystal X-ray diffraction, the two compounds are isostructural and crystallize in the monoclinic system with P 2 1 /c space group with a =14.3903(7) A, b =15.5232(6) A, c =7.3943(3) A, β =90.577(2) ° , Z =4, V =1651.7(2) A 3 and R 1 =0.0358 for 1 , and a =14.3726(4) A, b =15.5078(5) A, c =7.3932(2) A, β =90.576(2) ° , Z =4, V =1647.77(8) A 3 and R 1 =0.0323 for 2 . The structure exhibits an unusual 4,12-membered rings oxovanadium phosphate (V–P–O) layer capped by [ M (phen)] 2+ complexes with phen groups projecting above and below into the interlamellar regions. Therefore, the bimetallic phosphate undulating layers extend into three-dimensional supermolecular arrays through a strong π – π stacking interaction of the phen groups between adjacent layers.