Six novel pyrromethene- BF2 complexes,of which five compounds have not been reported,were synthesized and characterized.Their relationships between structure and photophysical behavior were studied with the aid of flu...Six novel pyrromethene- BF2 complexes,of which five compounds have not been reported,were synthesized and characterized.Their relationships between structure and photophysical behavior were studied with the aid of fluorescence and triplet state absorption spectra.The results indicate that,compared to 8- alkylpyrromethene- BF2 complexes,the compounds containing 8- aryl exhibit high fluorescence quantum yield and rather low triplet state absorption.展开更多
Three novel 8-alkyl pyrromethene-BF2 complexes have been synthesized. Their structures were confirmed by IR, MS, 1H NMR and elemental analysis. Their spectral behavior have been discussed in terms of UV-Vis and fluore...Three novel 8-alkyl pyrromethene-BF2 complexes have been synthesized. Their structures were confirmed by IR, MS, 1H NMR and elemental analysis. Their spectral behavior have been discussed in terms of UV-Vis and fluorescence spectral results, which indicate compound 4bhas a extremely high fluorescence quantum yield.展开更多
文摘Six novel pyrromethene- BF2 complexes,of which five compounds have not been reported,were synthesized and characterized.Their relationships between structure and photophysical behavior were studied with the aid of fluorescence and triplet state absorption spectra.The results indicate that,compared to 8- alkylpyrromethene- BF2 complexes,the compounds containing 8- aryl exhibit high fluorescence quantum yield and rather low triplet state absorption.
文摘Three novel 8-alkyl pyrromethene-BF2 complexes have been synthesized. Their structures were confirmed by IR, MS, 1H NMR and elemental analysis. Their spectral behavior have been discussed in terms of UV-Vis and fluorescence spectral results, which indicate compound 4bhas a extremely high fluorescence quantum yield.
