Construction of organic-inorganic hybrid molybdophosphonate clusters with copper-bipyridine.
An organic-inorganic hybrid polyoxomolybdate with formula as [Cu(2,2'-bpy)(H2O)]2[Cu(2,2'-bpy)(H2O)3][(O3PCCH3(OH)PO3)2Mo(VI)4O11(H2O)2]·7H2O (1) (2,2'-bpy=2,2'-bipyridine) has been successfully synthesized constructing by diphosphonate H2O3PC(CH3)(OH)PO3H2 (1-hydroxyethylidene-1,1-bisphosphonic acid, noted as HEDP or etidronate) under conventional aqueous solution. 1 was characterized by single-crystal X-ray diffraction, elemental analysis, IR spectroscopy, thermogravimetric (TG) analysis, and X-ray photoelectron spectroscopy (XPS). Each anion cluster of 1 can be regarded as the fusion of two [{Cu(2,2'-bpy)(H2O)}(O3PCCH3(OH)PO3)Mo(VI)2O6](2-) subunits with an additional six-coordinated [Cu(2,2'-bpy)](2+) coordination cation linking on one side and there exist weak π-π interactions among the bipyridine groups. The XPS spectra indicate that the oxidation states of Mo and Cu in 1 are +6 and +2, respectively. Photoluminescence properties of 1 and the free 2,2'-bipyridine ligand have been both analyzed, showing that the presence of ligand-to-metal-charge-transfer (LMCT) transitions and metal-ligand coordination have an important effecting on the photoluminescence.
Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475001, PR China.
Yu
Y
Huo
Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475001, PR China.
Lu
L
Yang
Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475001, PR China. Electronic address: jyniu@henu.edu.cn.
Jingyang
J
Niu
Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475001, PR China. Electronic address: jpwang@henu.edu.cn.
Jingping
J
Wang
D015082:2,2'-Dipyridyl / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004164:Diphosphonates / Q000737:chemistry*; D049449:Luminescence; D008958:Models, Molecular; D008982:Molybdenum / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D056951:Photoelectron Spectroscopy; D013055:Spectrophotometry, Infrared
D004164:Diphosphonates; D009942:Organometallic Compounds; D015082:2,2'-Dipyridyl; D003300:Copper; D008982:Molybdenum
Bipyridine; Copper; Diphosphonate; Photoluminescence; Polyoxomolybdate