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Spectrophotometric determination of anionic micellar binding constants of ionized and non‐ionized phenyl and methyl salicylates
Author(s) -
Niyaz Khan M.
Publication year - 1996
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/(sici)1099-1395(199605)9:5<295::aid-poc774>3.0.co;2-r
Subject(s) - chemistry , micelle , ionization , absorption (acoustics) , sodium , ion , organic chemistry , aqueous solution , physics , acoustics
The ionized (S − ) and non‐ionized (SH) phenyl (PSH) and methyl (MSH) salicylates exhibit strong and undetectable absorption at 350 nm, respectively. These molecular absorption properties were used to determine the binding constants of S − and SH with the micelles of sodium dodecyl sulphate in terms of the pseudophase model of micelles. The binding constants ( K 1 ) of S − are 4·0 ± 2·0 dm 3 mol −1 for PSH and 5·7 ± 1·2 dm 3 mol −1 for MSH and those ( K 2 ) of SH are 2350 ± 90 dm 3 mol −1 for PSH and 100 ± 10 dm 3 mol −1 for MSH at 30°C.