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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A novel hexanuclear titanium(IV)-oxo-iminodiacetate cluster with a Ti6O9 core: single-crystal structure and photocatalytic activities
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A novel hexanuclear titanium(IV)-oxo-iminodiacetate cluster with a Ti6O9 core: single-crystal structure and photocatalytic activities

机译：具有Ti6O9核的新型六核钛（IV）-氧代-亚氨基二乙酸酯簇：单晶结构和光催化活性

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摘要

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.
机译：通过TiCl4和亚氨基二乙酸酯之间的H2O2辅助反应合成了一个新的六核钛-氧代羧酸钛簇簇K7H [Ti6O9（ida）（6）] Cl-2中心点13H（2）O {Ti6O9}配体。该团簇通过单晶X射线衍射和广泛的分析方法（包括FT-IR，UV / vis光谱以及电化学和热重分析）进行了全面表征。作为一种新型的羧酸取代的Ti-oxo簇，{Ti6O9}簇的结构图案由一个对称的{Ti6O6}六角棱镜和两个交错的三角形{Ti3O3}亚基组成，这些亚基通过三个mu（2）-O桥连接。 {Ti6O9}聚阴离子通过K +阳离子连接形成新颖的3D结构。通过固态/溶液NMR，ESI-MS光谱研究了{Ti6O9}聚阴离子在水溶液中的结构信息和稳定性。而且，该Ti-氧代簇具有作为​​可见光均相光催化剂降解罗丹明B（RhB）的显着潜力。最后，光谱数据说明了拟议的过氧钛（IV）介导的光催化途径。

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