Excited State Properties of Donor−Acceptor Substituted trans

11664 J. Phys. Chem. A, Vol. 104, No. 49, 2000

Additions and Corrections

ADDITIONS AND CORRECTIONS

2000, Volume 104A Frederick D. Lewis* and Wilfried Weigel: Excited State Properties of Donor-Acceptor Substituted trans-Stilbenes: The meta-Amino Effect Page 8149. The vertical spacing between data entries in Table 3 is incorrect. A corrected version of the table appears below. TABLE 3: Quantum Yields for Fluorescence and Photoisomerization, Fluorescence Decay Times at 298 and 77 K, Rate Constants for Fluorescence Decay, Nonradiative Decay, Intersystem Crossing, and Internal Conversion in Solvents of Different Polarity compd 3DS

4DSd

3A3′CS

3DCS

4DCSf

solvent

Φfl

Φtc

MC MTHF EtOH ACN n-hexane Et2O EtOH ACN MC MTHF EtOH ACN MC MTHF EtOH ACN cyclohexane MTHF EtOH ACN

0.72 0.33 0.18 0.20 0.030 0.029 0.035 0.037 0.56 0.24 0.09 0.18 0.64 0.14 0.03 0.05 0.03 0.06 0.07 0.13

0.08 0.44 0.39

0.22 0.24 0.11 0.26 0.24 0.45 0.4 0.5 0.4

τfl77 K (ns)

kfl (108 s-1)

13.0 14.3 12.4 13.1

13.0 15.7 16.9

0.55 0.23 0.14 0.15

0.1 0.1

1.7 1.7e

τfl298 K (ns)

8.4 8.8 8.3 11.1 13.3 11.5 7.7 13.5 0.085g 0.46g 0.52g

8.9 11.9 13.4 12.9 14.6 16.3 1.7h 1.7i

2.9 3.5

knr (108 s-1)a 0.21 0.47 0.66 0.61

kisc (108 s-1)b

kic (108 s-1)c

0.13 0.70 0.56

97 96

0.67 0.27 0.11 0.16 0.48 0.12 0.043 0.038 3.53

0.52 0.86 1.1 0.74 0.27 0.75 1.28 0.70 114

1.52 2.5

16.7

0.53