A novel hexanuclear titanium(IV)-oxoiminodiacetate cluster with a Ti6O9 core: singlecrystal structure and photocatalytic activities

Lubin Ni,aDashuai Liang,aYin Cai,aGuowang Diao*aand Zhaohui Zhou*b

aCollege of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, Jiangsu, People’s Republic of China.

bState Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China.

Abstract:A new family of hexanuclear titanium(IV)-oxo-carboxylate cluster K7H[Ti6O9(ida)6]Cl2·13H2O {Ti6O9} has been synthesized via the H2O2-assisted reaction between TiCl4 and iminodiacetate ligands. This cluster was fully characterized by single-crystal X-ray diffraction and a wide range of analytical methods, including FT-IR, UV/vis spectroscopy as well as electrochemistry and thermogravimetric analysis. As a new type of carboxylate substituted Ti-oxo-cluster, the structural motif of the {Ti6O9} cluster consists of one symmetric {Ti6O6} hexagonal prism with two staggered triangular {Ti3O3} subunits linked by three μ2-O bridges. The {Ti6O9} polyanions are linked by K+ cations to form a novel 3D architecture. The structural information and stability of the {Ti6O9} polyanion in aqueous solution were thoroughly investigated by solid-state/solution NMR, ESI-MS spectroscopy. Moreover, this Ti-oxo cluster exhibits remarkable potential as a visible-light homogeneous photocatalyst for degradation of rhodamine B (RhB). Finally, a proposed peroxotitanium(IV)-mediated photocatalytic pathway involved is illustrated by spectroscopic data.

Dalton Trans.,2016, 45, 7581–7588.

文章链接:http://pubs.rsc.org/en/Content/ArticleLanding/2016/DT/C6DT00031B#!divAbstract

Dalton Trans-2016-45-7581