Controllable assembly, characterization and catalytic properties of a new Strandberg-type organophosphotungstate. Issue 4 (22nd December 2015)

• Record Type: Journal Article
• Authors: Ma, Hong-Xin; Du, Jing; Zhu, Zai-Ming; Lu, Ting; Su, Fang; Zhang, Lan-Cui
• Is Part Of: Dalton transactions. Volume 45:Issue 4(2016)
• Page Start: 1631
• Page End: 1637
• Publication Date: 2015-12-22
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c5dt04412j
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A new Strandberg-type organophosphotungstate was assembled under hydrothermal conditions and displayed good fluorescence properties and catalytic activity. Abstract : Using phenylphosphonic acid, simple tungstate and copper(ii ) compounds as starting materials, an organic–inorganic hybrid Strandberg-type organophosphotungstate, {[(Cu(H2 O)(μ-bipy))2 (C6 H5 PO3 )2 W5 O15 ]} n (bipy = 4, 4′-bipyridyl) (1 ), was assembled successfully under hydrothermal conditions and characterized by physico-chemical and spectroscopic methods. Compound1 represents the first example of a transition metal complex modified organophosphotungstate cluster. In the crystal structure of compound1, the polymeric 1-D {Cu-bipy} n chains are interconnected by [(C6 H5 PO3 )2 W5 O15 ] 4− (abbreviated as {(C6 H5 P)2 W5 }) units into a 3-D framework. A hollow Keggin isopolytungstate [H2 W12 O40 ] 6− ({W12 })-Cu(ii ) coordination polymer, {[Cu(bipy)2 ((μ-bipy)Cu(bipy))2 (H2 W12 O40 )]·12H2 O} n (2 ), was obtained at different molar ratios of the starting materials and pH. The two Cu(ii ) coordination polymers exhibit good acid-catalytic activity for the synthesis of cyclohexanone ethylene ketal. Their fluorescence properties were studied.