Table 3. Transition energies and Franck–Condon integrals of transitions to different vibrational levels (‘vib’ level) of the ¹L_b states of toluene, p-cresol and 3-methylindole and the ¹L_a state of 3-methylindole. The vibrational level is denoted as MvN, where N is the assignment of the vibrational mode and M is the vibrational level of that mode. The C–C bend, C–H bend and C–C stretch mode are denoted as B_CC, B_CH and S_CC, respectively.

‘vib’ level	Energy/cm–1	FC integral
Toluene
0	37 310	0.59
1vBCC	37 830	–0.43
1vBCH	38 288	0.49
1vBCC/1vBCH	38 808	–0.35
2vBCH	39 266	0.26
1vBCC/2vBCH	39 786	–0.18
p-Cresol
0	34 965	0.52
1vBCC	35 810	0.58
1vBCH	36 221	0.17
2vBCC	36 655	0.45
1vBCH/1vBCC	37 066	0.18
3 BCC	37 500	0.28
1vBCH/2vBCC	37 911	0.14
4vBCC	38 345	0.14
3-Methylindole 1 L b
0	34 424	0.62
1vSCC	35 199	0.47
1vBCH	35 381	0.44
2vSCC	35 974	0.23
1vBCH/1vSCC	36 156	0.33
3vSCC	36 749	0.09
1vBCH/2vSCC	36 931	0.17
3-Methylindole 1 L a
0	35 088	0.57
1vSCC	35 872	0.53
1vBCH	36 135	0.32
2vSCC	36 656	0.34
1vSCC/1vBCH	36 919	0.30
3vSCC	37 440	0.18
1vSCC/2vBCH	37 966	0.19
4vSCC	38 224	0.08
1vSCC/3vBCH	39 013	0.10