Li Qiu-Ping, Yan Bing
Department of Chemistry, Tongji University, Shanghai, China.
State Key Lab of Water Pollution and Resource Reuse, Tongji University, Shanghai, China.
Photochem Photobiol. 2014 Jan;90(1):22-8. doi: 10.1111/php.12149. Epub 2013 Sep 3.
Four kinds of luminescent hybrid soft gels have been assembled by introducing the lanthanide (Eu(3+) , Tb(3+) ) tetrakis β-diketonate into the covalently bonded imidazolium-based silica through electrostatic interactions. Here, the imidazolium-based silica matrices are prepared from imidazolium-derived organotriethoxysilanes by the sol-gel process, in which the imidazolium cations are strongly anchored within the silica matrices while anions can still be exchanged following application for functionalization of lanthanide complexes. The photoluminescence measurements indicated that these hybrid soft gels exhibit characteristic red and green luminescence originating from the corresponding ternary lanthanide ions (Eu(3+) , Tb(3+) ). Further investigation of photophysical properties reveals that these soft gels have inherited the outstanding luminescent properties from the lanthanide tetrakis β-diketonate complexes such as strong luminescence intensities, long lifetimes and high luminescence quantum efficiencies.
通过静电相互作用将镧系元素（Eu(3+)、Tb(3+)）四β-二酮酸盐引入到共价键合的咪唑基二氧化硅中，组装得到了四种发光杂化软凝胶。在此，咪唑基二氧化硅基质由咪唑衍生的有机三乙氧基硅烷通过溶胶-凝胶法制备，其中咪唑阳离子牢固地锚定在二氧化硅基质中，而阴离子在用于镧系配合物功能化后仍可交换。光致发光测量表明，这些杂化软凝胶表现出源自相应三元镧系离子（Eu(3+)、Tb(3+)）的特征红色和绿色发光。对光物理性质的进一步研究表明，这些软凝胶继承了镧系四β-二酮酸盐配合物的优异发光性质，如强发光强度、长寿命和高发光量子效率。
