EMISSION SPECTRA AND EXCITED-STATE GEOMETRY OF ALPHA-DIKETONES
EMISSION SPECTRA AND EXCITED-STATE GEOMETRY OF ALPHA-DIKETONES
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DOI：
10.1021/ja00993a022
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发表时间：
1967-01-01
影响因子：
15
通讯作者：
LEERMAKERS, PA
中科院分区：
文献类型：
--
作者：
EVANS, TR;LEERMAKERS, PA
测量了一系列开链和环状脂肪族和芳香族α-二酮的吸收光谱和发射光谱。从吸收，荧光和磷光数据单重态-三重态分裂已被测量，和吸收和荧光曲线的审查允许地面和发射激发态之间的构象差异的估计。复杂分子基态的几何构型可以用许多方法定性地确定，但确定同一分子激发态的构象或几何构型的方法却很少。通常情况下，组态被假设为与基态的组态相同，或者基于直觉被假设为不同，或者通过合理的精细测量推导出来。
Absorption and emissionspectra of a series of open-chain and cyclic aliphatic and aromatic a-diketones have been measured. From absorption, fluorescence, and phosphorescence data singlet-triplet splittings have been measured, and scrutiny of absorption and fluorescence curves permits an estimation of conformational differences between ground and emitting excited states. he geometry of ground states of complex molecules can be qualitatively determined by numerous meth-ods, but few ways exist for determining conformations or geometries of excited states of the same molecules. Often the configuration is assumed to be the same as that for the ground state, or is assumed to be different on the basis of intuition, 1 or is deduced by reasonably elaborate measurements.-