TY - JOUR
T1 - On the photolysis of phthalic acid dialkyl esters
T2 - a product analysis study
AU - Hizal, G.
AU - Zhu, Q. Q.
AU - Fischer, Ch H.
AU - Fritz, P. M.
AU - Schnabel, W.
PY - 1993/5/15
Y1 - 1993/5/15
N2 - The following phthalic acid dialkyl esters were subjected to UV irradiation (λinc = 254 nm at 22 °C or λinc = 240-440 nm at 40 °C): phthalic acid di(2-ethylhexyl) ester (DOP), phthalic acid di(n-octyl) ester (DNOP), phthalic acid di(n-decyl) ester (DDP) and phthalic acid dimethyl ester (DMP). In all cases (except DMP) analogous major photoproducts identified by the gas chromatography-mass spectrometry (GCMS) method are formed: 1-alkenes, alkyl alcohols, phthalic acid anhydride, 2-formyl benzoic acid esters and benzoic acid esters. Generally, the quantum yields of decomposition are quite low: φ </0.03. Extension of the linear alcohol chains decreases the stability: φ,(-DMP)<φ(-DNOP)<φ(-DDP). In the absence of O2, DOP, which contains branches in the alcohol chains, is more stable than the isomeric DNOP containing linear alcohol chains: φ(-DOP) <φ(-DNOP).
AB - The following phthalic acid dialkyl esters were subjected to UV irradiation (λinc = 254 nm at 22 °C or λinc = 240-440 nm at 40 °C): phthalic acid di(2-ethylhexyl) ester (DOP), phthalic acid di(n-octyl) ester (DNOP), phthalic acid di(n-decyl) ester (DDP) and phthalic acid dimethyl ester (DMP). In all cases (except DMP) analogous major photoproducts identified by the gas chromatography-mass spectrometry (GCMS) method are formed: 1-alkenes, alkyl alcohols, phthalic acid anhydride, 2-formyl benzoic acid esters and benzoic acid esters. Generally, the quantum yields of decomposition are quite low: φ </0.03. Extension of the linear alcohol chains decreases the stability: φ,(-DMP)<φ(-DNOP)<φ(-DDP). In the absence of O2, DOP, which contains branches in the alcohol chains, is more stable than the isomeric DNOP containing linear alcohol chains: φ(-DOP) <φ(-DNOP).
UR - http://www.scopus.com/inward/record.url?scp=0000983104&partnerID=8YFLogxK
U2 - 10.1016/1010-6030(93)85021-Y
DO - 10.1016/1010-6030(93)85021-Y
M3 - Article
AN - SCOPUS:0000983104
SN - 1010-6030
VL - 72
SP - 147
EP - 152
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
IS - 2
ER -