Photophysical properties of luminescent quaternary lanthanide molecular hybrid systems with chemical bonds from the cooperative design and assembly of structure and function.
Two long chain aliphatic acyl chlorides (dodecanoyl chloride (C(10)H(19)OCl, abbreviated as DC) and stearoyl chloride (C(18)H(35)Ocl, abbreviated as SC)) were modified by means of the amidation reaction with crosslinking molecules (N-aminopropyl-triethoxylsiliane, (APES, H(2)N(CH(2))(3)Si(OC(2)H(5))(3))) and afford two kinds of structural molecular bridge DC (SC)- APES with double reactivity. Subsequently, according to the principle of coordination chemistry, ternary lanthanide (terbium and europium) molecular complex systems with two molecular bridges DC (SC)- APES and 1,10-phenanthroline (phen) of were successfully assembled. Then the modified molecular bridges behave as structural ligands to form the covalent bond Si- O network with matrix precursor (tetraethoxysilane, TEOS) through a sol-gel process (cohydrolysis and copolycondensation process), resulting in a novel quaternary molecular hybrid material (so called as phen-Tb(Eu)-DC(SC)- APES) with strong chemical bonds (N- Tb(Eu)- O coordination bonds and Si- O covalent bonds). And phen behaves as functional ligand to sensitize the luminescence of terbium or europium ions through the effective intramolecular energy transfer process, which gives rise to the characteristic emission of metal ion.
Yan
Bing
B
Department of Chemistry, Tongji University, Shanghai, 200092, PR China. byan@tongji.edu.cn
Xu
Shuai
S
Lu
Hai-Feng
HF