INTRA-MOLECULAR EXTERNAL HEAVY-ATOM EFFECT IN BROMONORBORNENES, BENZONORBORNENES AND NAPHTHONORBORNENES
INTRA-MOLECULAR EXTERNAL HEAVY-ATOM EFFECT IN BROMONORBORNENES, BENZONORBORNENES AND NAPHTHONORBORNENES
复制标题
DOI：
10.1021/ja00484a007
复制
发表时间：
1978-01-01
影响因子：
15
通讯作者：
STONE, P
中科院分区：
文献类型：
--
作者：
CHANDRA, AK;TURRO, NJ;STONE, P
A theoretical analysis of the external heavy atom effect of a halogen atom on the radiative rate constant of phospho-rescence is examined as a function of position of a bromine atom or atoms relative to a naphthalene or a benzene chromophore for a series of mono-and dibromo-, naphtho-, and benzonorbornenes. The theoretical results are then compared to experimental data and lead to the conclusion that the enhancement of the phosphorescence process takes place through the second-order mixing of the triplet states of the chromophore with the singlet charge transfer states arising primarily from an electron trans-fer from the orbitals of the heavy atom perturber to the unfilled* orbitals of the chromophore.
