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Issue 18, 2016
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A novel hexanuclear titanium(iv)-oxo-iminodiacetate cluster with a Ti6O9 core: single-crystal structure and photocatalytic activities

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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.

Graphical abstract: A novel hexanuclear titanium(iv)-oxo-iminodiacetate cluster with a Ti6O9 core: single-crystal structure and photocatalytic activities

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Supplementary files

Article information


Submitted
04 jan. 2016
Accepted
23 jan. 2016
First published
27 jan. 2016

Dalton Trans., 2016,45, 7581-7588
Article type
Paper
Author version available

A novel hexanuclear titanium(IV)-oxo-iminodiacetate cluster with a Ti6O9 core: single-crystal structure and photocatalytic activities

L. Ni, D. Liang, Y. Cai, G. Diao and Z. Zhou, Dalton Trans., 2016, 45, 7581
DOI: 10.1039/C6DT00031B

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