Table 2. Rate and Time Constants for the Excited States of F₂PhEtyCbl and PhEtyCbl in Water As a Function of Temperature.

temperature (°C)	λexc (nm)	kB (ps–1)a	τB ps	kC (ps–1)b	τC ps
F2PhEtyCbl
RT (ca. 18)	406	0.145	6.9	0.0139	72.5
10	550	0.102	9.8	0.0128	78.0
13	550	0.087	11.5	0.0137	72.9
23	550	0.148	6.8	0.0168	59.4
39	550	0.127	7.9	0.0204	49.0
53	550	0.167	6.0	0.0260	38.5
68	550	0.187	5.3	0.0352	28.4
PhEtyCbl8
18	406	0.117	8.5	0.0162	61.7
22	550	0.117	8.6	0.0179	55.9
31	550	0.128	7.8	0.0225	44.5
41	550	0.159	6.3	0.0236	42.4
53	550	0.151	6.6	0.0291	34.4

^aThe average error bars on k_B are ±0.01.

^bThe error bars on k_C 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 ±0.003 at the highest temperatures.