1028353-74-3Relevant academic research and scientific papers
Sensitized luminescence in dinuclear lanthanide(iii) complexes of bridging 8-hydroxyquinoline derivatives with different electronic properties
Xu, Hai-Bing,Li, Jia,Shi, Lin-Xi,Chen, Zhong-Ning
, p. 5549 - 5556 (2011)
Three new dinuclear lanthanide(iii) complexes {Eu(hfac)3(H 2O)}2(μ-HPhMq)2 (2) and {Ln(hfac) 3(H2O)}2(μ-HMe2NC 6H4Mq)2 (Ln = Eu, 3; Nd, 4) with 8-hydroxylquinoline derivatives in μ-phenol mode were synthesized and characterized, where hfac- = hexafluoroacetylacetonate, HPhMq = 2-methyl-5-phenylquinolin-8-ol, and HMe2C6H4Mq = 5-(4-(dimethylamino)phenyl)-2-methylquinolin-8-ol. Compared with that (400 nm) for {Eu(hfac)3}2(μ-HMq)2 (1, HMq = 2-methy-8-hydroxylquinoline), the excitation wavelength for sensitized lanthanide luminescence is extended to ca. 420 nm for 2, and 500 nm for 4 by introducing a phenyl or 4-(dimethylamino)phenyl to 8-hydroxylquinoline. These dinuclear lanthanide(iii) complexes exhibit distinctly fluoride-induced lanthanide(iii) emission enhancement in both intensity and lifetime due to replacing coordination water molecules or formation of strong O-H...F hydrogen bonds with coordinated H2O and μ-phenol, thus suppressing significantly the non-radiative O-H oscillators. The Royal Society of Chemistry.
