通过改进的溶胶-凝胶法由纳米二氧化硅负载的铥配合物近红外荧光杂化材料

NIR-Fluorescent Hybrid Materials of Tm Complexes Carried by Nano-SiO via Improved Sol-Gel Method.

作者信息

Wang Yanxin, Sun Qiuyu, Huang Linjun, Lu Peng, Wang Xiaozhen, Zhang Zhe, Wang Yao, Tang Jianguo, Belfiore Laurence A

机构信息

Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Tech. Cooperation on Hybrid Materials, College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.

Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80523, USA.

出版信息

Nanomaterials (Basel). 2020 Oct 3;10(10):1964. doi: 10.3390/nano10101964.

Tm has obvious emission characteristics in the near-infrared band. Thulium ions combined with different organic ligands lead to different fluorescent properties. In the near-infrared region, Tm is a down-conversion fluorescent material that is unstable under high temperature and acidic conditions. Moreover, in those complex environments, the fluorescence from Tm complex is usually degraded. In this work, two kinds of near-infrared fluorescent complexes, Tm(TTA)phen and Tm(DBM)phen, were prepared, and the intensity of their fluorescence is compared. The fluorescence intensity at 802 nm is greatly improved compared with Tm(TTA)phen, and the intensity of the emission at 1235 nm and 1400-1500 nm is also enhanced. Moreover, the emission lifetime of SiO-Tm(TTA)phen is 50.38 μs. Tm(TTA)phen complex and SiO-Tm(TTA)phen hybrid materials have better fluorescence than Tm(DBM)phen and SiO-Tm(DBM)phen. Therefore, HTTA is a better choice of organic ligands for Tm. The NIR-fluorescent hybrid materials prepared have stronger fluorescence after combining with nano-SiOcompared with pure Tm complexes, and have stronger structural stability compared with pure nano-SiO.

铥（Tm）在近红外波段具有明显的发射特性。铥离子与不同的有机配体结合会导致不同的荧光性质。在近红外区域，铥是一种下转换荧光材料，在高温和酸性条件下不稳定。此外，在那些复杂环境中，铥配合物的荧光通常会降解。在这项工作中，制备了两种近红外荧光配合物，即铥（噻吩甲酰三氟丙酮）邻菲啰啉（Tm(TTA)phen）和铥（二苯甲酰甲烷）邻菲啰啉（Tm(DBM)phen），并比较了它们的荧光强度。与Tm(TTA)phen相比，802nm处的荧光强度有了很大提高，1235nm以及1400 - 1500nm处的发射强度也增强了。此外，二氧化硅 - 铥（噻吩甲酰三氟丙酮）邻菲啰啉（SiO-Tm(TTA)phen）的发射寿命为50.38微秒。铥（噻吩甲酰三氟丙酮）邻菲啰啉配合物和二氧化硅 - 铥（噻吩甲酰三氟丙酮）邻菲啰啉杂化材料比铥（二苯甲酰甲烷）邻菲啰啉和二氧化硅 - 铥（二苯甲酰甲烷）邻菲啰啉具有更好的荧光。因此，噻吩甲酰三氟丙酮（HTTA）是铥更好的有机配体选择。制备的近红外荧光杂化材料与纯铥配合物相比，与纳米二氧化硅结合后具有更强的荧光，并且与纯纳米二氧化硅相比具有更强的结构稳定性。