Journal
DALTON TRANSACTIONS
Volume 45, Issue 18, Pages 7581-7588Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6dt00031b
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Funding
- National Natural Science Foundation of China [21401162]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [14KJB430024]
- Jiangsu Provincial Postdoctoral Sustentation Fund [1402015B]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Natural Science Foundation of Education Committee of Jiangsu Province [12KJB150023]
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A new family of hexanuclear titanium(IV)-oxo-carboxylate cluster K7H[Ti6O9(ida)(6)]Cl-2 center dot 13H(2)O {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 mu(2)-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.
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