A new luminescent molecular based terbium hybrid material containing both organic polymeric chains and inorganic silica networks
A new luminescent molecular based terbium hybrid material containing both organic polymeric chains and inorganic silica networks
复制标题
DOI：
10.1007/s10854-009-9871-x
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Kai Sheng;B. Yan
中科院分区：
文献类型：
--
作者：
Kai Sheng;B. Yan
合成了三元有机/无机/聚合物铽杂化材料（ACAC-Si）-Tb-PVP [ACAC =乙酰丙酮; PVP =聚4-乙烯基吡啶]。首先，通过氢转移加成反应，以交联剂3-（三乙氧基甲硅烷基）-丙基异氰酸酯（特匹克），得到功能性分子桥ACAC-Si，其随后与Tb 3+配位，从而与TEOS形成无机Si-O-Si网络（四乙氧基硅烷）通过水解和缩聚过程，以4-乙烯基吡啶为单体，在过氧化苯甲酰（BPO）存在下与Tb（III）配位，合成了PVP作为有机高分子链。为了比较，还制备了Tb-（ACAC-Si）二元杂化材料。对两种杂化材料的性能进行了详细的表征。结果表明，铽配合物以共价键的形式嵌入到有机聚合物基体中，微观结构均匀。此外，二元和三元杂化材料之间的激发光谱的区别表明，聚合物有机链组分的引入改变了铽配位球周围的微环境。发射光谱显示出Tb 3+强烈的特征荧光，说明两种杂化材料中发生了有效的分子内能量转移。
We have synthesized the ternary organic/inorganic/polymeric terbium hybrid material (ACAC-Si)-Tb-PVP [ACAC = acetylacetone; PVP = poly(4-vinylpyridine)]. Firstly, the ACAC was modified through the hydrogen transfer addition reaction with a cross-linking reagent 3-(triethoxysilyl)-propyl isocyanate (TEPIC) to obtain a functional molecular bridge ACAC-Si which subsequently coordinated with Tb3+and thus formed the inorganic Si-O-Si networks with TEOS (tetraethoxysilane) through hydrolysis and polycondensation process, and PVP acted as organic polymeric chains was synthesized using 4-vinylpyridine as the monomer after coordination with Tb(III) in the presence of BPO (Benzoyl Peroxide). For comparison, the binary hybrid material Tb-(ACAC-Si) was also prepared. The properties of the two hybrid materials were characterized in detail. The results reveal that the terbium complex was embedded into the organic polymer matrix by covalent bond with uniform microstructure. Furthermore, the distinction of the excitation spectrum between the binary and ternary hybrid materials suggests that the introduction of the polymeric organic chain component changed the microenvironment around the coordination sphere of the terbium. The emission spectrum exhibit the strong characteristic fluorescence of Tb3+, which accounts for the efficient intro-molecular energy transfer taken place in the two hybrid materials.