Zhang Guang-Lin, Wang Sheng, Hou Jin-Le, Mo Chong-Jiao, Que Chen-Jie, Zhu Qin-Yu, Dai Jie
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China.
Dalton Trans. 2016 Nov 28;45(44):17681-17686. doi: 10.1039/c6dt03034c. Epub 2016 Oct 18.
Although a lot of titanium oxo-clusters (TOCs) have been synthesized and characterized, research studies on their application properties are still limited. The work described here is not only aimed at the synthesis and crystal structures of the TOCs, but also aimed at exploration of their potential applications in molecule based fluorescence labelling and photocatalysis. Three heterometallic TOC compounds with lanthanide (Ln) elements Sm(iii) (1), Eu(iii) (2) and Gd(iii) (3) are prepared and their cluster structures are characterized as LnTi cages. Compound 2 exhibits the characteristic fluorescence of Eu(iii) and the emission intensity can be decreased upon irradiation and recovered by air oxidation, which is attributed to the energy transfer between Eu(iii) and photo-induced Ti(iii) of the oxo-TiO cluster. The fluorescence intensity of 2 can be significantly increased when treated with 1,10-phenanthroline. The catalytic properties of 2 were determined by the degradation of dyes on a paper substrate. Compound 2 has potential applications as a molecule based fluorescent labelling agent and photodegeneration catalyst.
尽管已经合成并表征了许多钛氧簇（TOC），但对其应用性能的研究仍然有限。本文所述工作不仅旨在研究TOC的合成和晶体结构，还旨在探索其在基于分子的荧光标记和光催化方面的潜在应用。制备了三种含有镧系元素Sm(iii)（1）、Eu(iii)（2）和Gd(iii)（3）的异金属TOC化合物，并将它们的簇结构表征为LnTi笼。化合物2表现出Eu(iii)的特征荧光，其发射强度在光照下会降低，并通过空气氧化恢复，这归因于Eu(iii)与氧代TiO簇的光致Ti(iii)之间的能量转移。用1,10 - 菲咯啉处理时，2的荧光强度可显著增加。通过在纸基质上对染料的降解来测定2的催化性能。化合物2作为基于分子的荧光标记剂和光降解催化剂具有潜在应用。
