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. 2020 Apr 20;59(9):6422–6431. doi: 10.1021/acs.inorgchem.0c00453

Table 1. Rate Constants (and Lifetimes) for the Excited States B and C of HOPryCbl As a Function of Solvent and Temperature.

solvent temperature (°C) η (cp) εa λexc (nm) kB ps–1 (τB ps)g kC ps–1 (τC ps)h
water 11     540 0.090 (11) 0.0142 (70)
water 19 1.027b 80.1 408 0.169 (5.9) 0.0163 (61)
water 23     540 0.156 (6.4) 0.0184 (54)
water 42     540 0.178 (5.6) 0.0278 (36)
water 56     540 0.214 (4.7) 0.0321 (31)
water 73     540 0.265 (3.8) 0.0364 (27)
ethanol 8     408 0.134 (7.5) 0.0095 (105)
ethanol 21 1.185c 24.6 408 0.189 (5.3) 0.0124 (81)
ethanol 36     408 0.305 (3.3) 0.0154 (65)
ethanol 55     408 0.448 (2.2) 0.0210 (48)
ethanol 75     408 0.584 (1.7) 0.0272 (37)
methanol 19 0.586c 32.7 408 0.254 (3.9) 0.0143 (70)
2-butanol 20 3.74d 20 408 0.375 (2.7) 0.0072 (139)
3:1 EG/H2O 20 8.07e 46f 408 0.139 (7.2) 0.0072 (139)
ethylene glycol 19 22.3e 37 408 0.040 (25) 0.0060 (167)
a

Dielectric constants at 20 °C57 unless otherwise indicated.

b

Ref (55).

c

Viscosity at 20 °C.56

d

Ref (58).

e

Ref (59).

f

Dielectric constant at 25 °C.60

g

The average error bars on kB are ±0.01.

h

The error bars on kC were estimated conservatively based on upper and lower limits for potential fits to the data and are included in Figure 7. These range from ±0.001 at low temperatures to ±0.0025 at the highest temperatures.