At 77 K excitation spectra,luminescence and time-resolved spectra of Eu(o-MBA)2NO3 Phen and Eu(m-MBA)2NO3 Phen (MBA:methylbenzoate,Phen 1,10-phenanthroline) complexes were measured. Spectral data show that because of ...At 77 K excitation spectra,luminescence and time-resolved spectra of Eu(o-MBA)2NO3 Phen and Eu(m-MBA)2NO3 Phen (MBA:methylbenzoate,Phen 1,10-phenanthroline) complexes were measured. Spectral data show that because of steric effect of ortho-methyl substituent there occur two Eu3+ sites with slightly different chemical environment in the Eu(o-MBA)2NO3Phen complex.The local symmetnes for the central metal ions are C2v and C1,C2 or Cs,respectively.However,there is only one Eu3+ site in the Eut(m-MBA)2NO3Phen complex which is similar to the C2v Eu3+ site of the previous complex.This demonstrates that the Eu3+ ion can be used as a conformational probe in the solid state compounds.展开更多
用6-氯香豆素-3-甲酰氯(Ⅰ)和5-(取代)-2-氨基-1,3,4-噻二唑(Ⅱa-Ⅱi)作用合成了9种新的目标化合物(Ⅲa-Ⅲi),用HRMS,IR和1 H NMR对化合物结构进行了表征,确定了化合物的结构,并对其紫外吸收光谱和荧光光谱进行了分析.研究发现:在紫外...用6-氯香豆素-3-甲酰氯(Ⅰ)和5-(取代)-2-氨基-1,3,4-噻二唑(Ⅱa-Ⅱi)作用合成了9种新的目标化合物(Ⅲa-Ⅲi),用HRMS,IR和1 H NMR对化合物结构进行了表征,确定了化合物的结构,并对其紫外吸收光谱和荧光光谱进行了分析.研究发现:在紫外光谱中,新化合物(Ⅲa-Ⅲi)和2种原料化合物相比,因共轭链的增长而使其最大吸收波长(λmax)红移;9种化合物表现出比原料化合物(Ⅰ)较强的荧光性能.展开更多
文摘At 77 K excitation spectra,luminescence and time-resolved spectra of Eu(o-MBA)2NO3 Phen and Eu(m-MBA)2NO3 Phen (MBA:methylbenzoate,Phen 1,10-phenanthroline) complexes were measured. Spectral data show that because of steric effect of ortho-methyl substituent there occur two Eu3+ sites with slightly different chemical environment in the Eu(o-MBA)2NO3Phen complex.The local symmetnes for the central metal ions are C2v and C1,C2 or Cs,respectively.However,there is only one Eu3+ site in the Eut(m-MBA)2NO3Phen complex which is similar to the C2v Eu3+ site of the previous complex.This demonstrates that the Eu3+ ion can be used as a conformational probe in the solid state compounds.
文摘用6-氯香豆素-3-甲酰氯(Ⅰ)和5-(取代)-2-氨基-1,3,4-噻二唑(Ⅱa-Ⅱi)作用合成了9种新的目标化合物(Ⅲa-Ⅲi),用HRMS,IR和1 H NMR对化合物结构进行了表征,确定了化合物的结构,并对其紫外吸收光谱和荧光光谱进行了分析.研究发现:在紫外光谱中,新化合物(Ⅲa-Ⅲi)和2种原料化合物相比,因共轭链的增长而使其最大吸收波长(λmax)红移;9种化合物表现出比原料化合物(Ⅰ)较强的荧光性能.