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Optically hybrid lanthanide ions (Eu 3+ , Tb 3+ )‐centered materials with novel functional di‐urea linkages
Author(s) -
Wang Q. M.,
Yan B.
Publication year - 2005
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.926
Subject(s) - chemistry , hybrid material , luminescence , triethoxysilane , lanthanide , isocyanate , moiety , intramolecular force , ion , covalent bond , condensation polymer , photochemistry , polymer chemistry , polymer , organic chemistry , physics , optoelectronics , polyurethane
The synthesis of 3‐(triethoxysilyl)‐propyl isocyanate (TEPIC) modified by (3‐aminopropyl)triethoxysilane (APS) and the preparation of the corresponding organic–inorganic molecular‐based hybrid material with the two components equipped with covalent bonds is described. The coupling agent moiety is a convolution of TEPIC and APS through NHC(O)NH groups, which is applied to coordinate to RE 3+ and further formed SiO backbones after hydrolysis and polycondensation processes. For comparison and luminescence efficiency purposes, we added 2,2‐bipyridyl to the above hybrids in order to increase the conjugating effects and sensitize rare earth ions emissions. Luminescence spectra were utilized to characterize the photophysical properties of the hybrid material obtained, and the above spectroscopic data reveal that the triplet energy of 2,2‐dipyridyl in this favorable hybrid system matches with the emissive energy level of RE 3+ . In this way, the intramolecular energy transfer process took place within these molecular‐based hybrids and strong green and red emissions of RE 3+ have been achieved. Copyright © 2005 John Wiley & Sons, Ltd.