The electronic spectra of 10, 10-dimethylanthracen-9-one crystals: Spin—orbit/vibronic coupling in 3nπ3 states |
| |
Authors: | Stephen R Wilson Richard Bramley |
| |
Institution: | Research School of Chemistry, Australian National University, Canberra, A.C T. 2600, Australia |
| |
Abstract: | 10, 10-dimethylanthracen-9-one single crystal emission and absorption spectra have been recorded at low temperatures, as well as Raman spectra on the melt. The absorption spectra of both the lowest triplet and lowest excited singlet states clearly show the absorption origins of the three different molecular sites in the triclinic unit cell of the crystal. The emission spectra indicate that substantial spin—orbit/vibronic state mixing occurs, giving rise to transitions between the z sub-level of the lowest 3nπ3 state (T1) and both totally and non-totally symmetric vibrations of the ground state. The preferred intensity stealing route is from T1 (z) to S2(1ππ3) by spin—orbit coupling with vibronic mixing of S3 and S4(1ππ3, 1B2). |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|