Table 2 Optical Data recorded at room temperature in dichloromethane for BTI, T1, T2, and T3 unless otherwise mentioned.

From: Site-selected thionated benzothioxanthene chromophores as heavy-atom-free small-molecule photosensitizers for photodynamic therapy

Compound

λmax (nm)

ε (M−1 cm−1)

λonset (nm)

Egopt (eV)

λem (nm)

φFa

τobs (ns)

φΔb

BTI

455

22200

510

2.43

502

0.99

7.48

0

T1

508

26600

580

2.13

−

−

−

1.00

T2

513

25700

592

2.09

−

−

−

0.98

T3

571

19000

684

1.81

−

−

−

0.78

  1. aMeasured using Coumarine-153 as reference (φF = 0.45 in MeOH).
  2. bOptical data recorded in deuterated chloroform, Phenalenone used as a reference (φΔ = 0.95 in chloroform).
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