Table 2.

UV-Visible Spectroscopic Data for DHP B Halophenol Complexes at pH 7

	λmax (nm)	ASoret/A380
Ferric DHP B	407, 508, 540 (sh), 633	1.81
+ phenol	406, 503, 538 (sh), 612	1.70
+ 4-fluorophenol	404, 502, 538 (sh), 612	1.53
+ 4-chlorophenol	404, 503, 538 (sh), 624	1.54
+ 4-bromophenol	404, 504, 538 (sh), 640 (sh)	1.39
+ 4-iodophenol	402, 503, 538 (sh), 640 (sh)	1.35
+ trifluorophenol	406, 500, 536 (sh), 617	1.80
+ trichlorophenol a	406, 503, 536 (sh), 624	1.57
+ trichlorophenol b	406, 504, 536 (sh), 619	1.81
+ tribromophenol	407, 506, 536 (sh), 623	1.74

^a2 mM

^b300 μM