title: Luminescence studies of europium chelates with increasing benzene ring substituents ligand-doped polymer.
abstract: The luminescence properties of four europium chelates with increasing benzene ring substituents ligand in poly(methylmethacrylate) (PMMA) have been investigated by fluorescence emission spectra and lifetime measurements. According to the fluorescence emission spectra, the Judd-Ofelt parameters Omega2, Omega4 of europium chelates-doped PMMA have been calculated and the radiative properties were also presented. It showed that the increase of benzene ring substituents in ligand can increase the metastable state lifetime tau(m), the luminescence quantum yield eta and the stimulated emission cross-section sigma of 5D0-->7F2 transition.
authors: Department of Chemical Engineering, Huizhou University, Huizhou, Guangdong 516007, PR China. lianghao@ustc.edu
authors: Hao
authors: H
authors: Liang
authors: Fang
authors: F
authors: Xie
authors: Min
authors: M
authors: Liu
authors: Zhen
authors: Z
authors: Jin
authors: Fusheng
authors: F
authors: Luo
authors: Zongyong
authors: Z
authors: Zhang
mesh_terms: D001554:Benzene / Q000737:chemistry*; D008024:Ligands; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; C475854:europium(III) chelate-2,2',2'',2'''-((4-((4-isothiocyanatophenyl)ethynyl)pyridine-2,6-diyl)bis(methylenenitrilo))tetrakis(acetic acid); D019904:Polymethyl Methacrylate; D001554:Benzene