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Two Hybrid Compounds Based on Octamolybdate and an N‐Donor Multidentate Ligand: Syntheses, Structures, and Properties
Author(s) -
Zhou Shi,
Chen YaGuang,
Liu Bo,
Li XiaoMin,
Wang DongXiao
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201301176
Subject(s) - chemistry , supramolecular chemistry , polyoxometalate , denticity , ligand (biochemistry) , crystallography , hydrogen bond , imidazole , molybdenum , thermogravimetric analysis , infrared spectroscopy , coordination complex , molecule , photochemistry , inorganic chemistry , stereochemistry , crystal structure , metal , organic chemistry , catalysis , biochemistry , receptor
Two polyoxometalate inorganic–organic hybrids based on octamolybdate and a multidentate N‐donor ligand, [Ag 4 L 4 (γ‐Mo 8 O 26 )] · 2H 2 O ( 1 ), [Ni 2 L 2 (γ‐Mo 8 O 26 )(H 2 O) 8 ] · 3H 2 O ( 2 ), in which L = 2,4,5‐tri(4‐pyridyl)imidazole, were synthesized under hydrothermal conditions. Compound 1 is constructed from octamolybdates (γ‐Mo 8 O 26 ) 4– , 1D AgL chains, and 2D AgL layers, which are held together through N–H ··· O hydrogen bonds between the chain/layer and the octamolybdates, extending into a 3D supramolecular structure. Compound 2 displays a 1D infinite chain structure. The chains are formed by coordination of the nitrogen atoms of the ligand to the five‐coordinate molybdenum atoms of (γ‐Mo 8 O 26 ) 4– and the Ni ions through the Mo–N–Ni bond and are further linked by N–H ··· O hydrogen bonds to form a 3D supramolecular architecture. Compound 2 , to the best of our knowledge, is the first example of an octamolybdate anion decorated by a big tridentate N‐donor organic molecule. The compounds were further characterized by IR spectroscopy, UV/Vis diffuse reflectance spectroscopy, photoluminescent spectroscopy, magnetic measurements, thermogravimetric analysis, and powder X‐ray diffraction. Moreover, their photocatalysis properties for degradation of methylene blue upon UV irradiation were examined.