Photofunctional terbium centered inorganic/organic hybrid material with the functionalized 5-dihydroxybenzoate linkage
Photofunctional terbium centered inorganic/organic hybrid material with the functionalized 5-dihydroxybenzoate linkage
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具有功能化5-二羟基苯甲酸酯键的光功能铽中心无机/有机杂化材料
DOI：
10.2478/s13536-012-0006-3
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发表时间：
2012-06
期刊：
影响因子：
--
通讯作者：
Bing Yan
中科院分区：
文献类型：
--
作者：
Ying Li;Yulong Sui;Bing Yan
本研究采用溶胶-凝胶法制备了硅基有机-无机杂化材料。通过3-（三乙氧基硅基）丙基异氰酸酯（TESPI）对3，5-二羟基苯甲酸（DHBA）的双羟基进行加成改性，得到了一种新型单体（DHBA-TESPI）。然后，将所得化合物和正硅酸乙酯（TEOS）分别用作无机和有机对应物。Tb ~（3+）与单体的羧基同时发生配位反应。采用红外光谱、核磁共振谱、紫外/维斯吸收光谱、低温磷光光谱和荧光光谱对杂化物进行了表征。最终的材料表现出强烈的绿色荧光（Tb 3+），这可以解释由有机对应物的配位引起的分子内能量转移。光谱数据还表明，三重态能量的有机配体匹配的发射能级的Tb 3+。
In this study, silica-based organic-inorganic hybrids were prepared using sol-gel methods. A new kind of monomer (DHBA-TESPI) was derived by modifying the double hydroxyl groups of 3, 5-dihydroxybenzoic acid (DHBA) with 3-(triethoxysilyl)-propyl isocyanate (TESPI) through the addition reaction. Then, the obtained compound and tetraethoxysilane (TEOS) were used as the inorganic and organic counterparts respectively. Coordination reaction between Tb3+ and the carboxylic groups of the monomer happen simultaneously. IR, NMR, UV/Vis absorption, low-temperature phosphorescence spectroscopy and fluorescence spectroscopy were used to characterize the hybrids. The final materials exhibited strong green-colored fluorescence (Tb3+), which can be explained by the intramolecular energy transfer caused by coordination of the organic counterpart. The spectroscopic data also revealed that the triplet state energy of the organic ligand matches the emissive energy level of Tb3+.
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