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. 2015 Sep 29;7(1):286–294. doi: 10.1039/c5sc03280f

Table 1. Optical properties of 5a, 9b and their oxidized states.

Absorption a
Emission a
λ max (ε) nm (103 M–1 cm–1) HLG b eV λ 0–0 nm Stokes shift cm–1 Φ F c τ F d ns
5a 595 (0.9), 550 (2.4), 520 (2.7), 450 e , 430 (11.8) 2.08 630 (615) 678 0.005 4.1
5a+ 2050 (5.9), 1560 (6.0), 1285 (9.3), 1120 (8.8), 805 (7.9), 658 (6.8), 516 (10.8), 484 (12.5) 0.60
5a2+ 1525 (10.3), 1270 (10.3), 1080 (18.3), 656 (12.8), 566 (15.3), 520 (20.0), 498 (20.5) 0.81
9b 475 e 2.61 ∼520 e (510) 926 f 0.006 5.9
9b+ 1540, 1275, 1090, 712, 647, 586 0.81
9b2+ 1530 (1.5), 1140 (24.0), 1020 (17.4), 705 (13.6), 572 (10.6), 439 (22.8) 0.81

aIn dichloromethane solutions.

bOptical HOMO–LUMO gap determined from the lowest energy band.

cFluorescence quantum yield.

dFluorescence decay time.

eShoulder.

fDetermined from emission and excitation spectra at 77 K.