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
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.
文摘需要计算空间某一点的热辐射环境,由于其主要影响因素是地球和大气的背景以及太阳,而MODTRAN 是一个比较有效可靠的大气辐射传输计算程序,于是主要考虑采用 MODTRAN 程序来计算空中某一点的热辐射环境.然后需要确定 MODTRAN 程序的输入数据,另一方面 MODTRAN 程序只能计算100 km 以下的大气辐射情况,于是先要解决观测点的转换问题,这里建立了一个模型可以使100 km 以上的情况转换成100 km 的情况;第二个需要解决的问题是下垫面的边界条件确定,这里根据地球表面的基础数据,得到了下垫面的边界条件.依照上述思路和理论计算了空中某一点的辐射环境,获得了初步的计算结果.
