期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 178, 期 1, 页码 70-75出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2005.07.001
关键词
nanophosphors; molecular-based hybrid materials; luminescence; rare earth ions
We report a novel technology for fabricating sol-gel derived nano-scale molecular hybrid materials that contain -NHC(=O)NH- groups anchored to a silica network. The modified 2-amino pyridine is grafted by 3-(triethoxysilyl)-propyl isocyanate and applied to coordinate to RE3+ (Eu3+ Tb3+) through nitrogen atoms of the heterocycle of pyridine group and further formed Si-O backbones after hydrolysis and polycondensation processes. For analogy and luminescence efficiency purpose, we added 1,10-phenanthroline to the above hybrids in order to increase the conjugating effects and sensitize rare earth ions emissions. IR, ultraviolet absorption and luminescence spectra were utilized to characterize the structure and photophysical properties of the obtained hybrid material and the above spectroscopic data reveal that the triplet energy of 1,10-phenanthroline in this favorable hybrid system matches with the emissive energy level of RE3+. (c) 2005 Elsevier B.V. All rights reserved.
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