Effect of ultraviolet light absorbers on photostabilization of azadirachtin-A in solution (part: II).
The effect of photostabilization of azadirachtin-A (Aza-A) was examined in solutions when exposed to UV radiation, in the presence of four structurally different UV absorbers namely, p-aminobenzoic acid, 2,4-dihydroxybenzophenone, 4,4'-dihydroxybenzophenone and phenyl salicylate. The percentages of Aza-A recovered from the solutions after 6 h exposed to UV radiation in the presence and absence of UV absorbers indicated that the order of stabilization of Aza-A by these absorbers was similar to that obtained in the solid phase experiments in accordance with our previous observations. It is observed that the addition of phenyl salicylate in Aza-A (in 1:1 mole ratio) provides the excellent photostabilization of Aza-A molecule in solid phase as well as in solution among the four absorbers studied.
Deota
P T
PT
Department of Applied Chemistry, Faculty of Technology and Engineering, M.S. University of Baroda, Vadodara-390 001, India. deotaptad1@sancharnet.in
Upadhyay
P R
PR
Valodkar
V B
VB
D010129:4-Aminobenzoic Acid / Q000737:chemistry; D031601:Azadirachta / Q000737:chemistry; D001577:Benzophenones / Q000737:chemistry; D004355:Drug Stability; D036701:Limonins / Q000737:chemistry*; D010572:Pest Control, Biological; D010782:Photolysis; D012459:Salicylates / Q000737:chemistry; D012996:Solutions; D014466:Ultraviolet Rays
D001577:Benzophenones; D036701:Limonins; D012459:Salicylates; D012996:Solutions; C026041:phenyl salicylate; C010329:azadirachtin; D010129:4-Aminobenzoic Acid