Triplet reactivity of psoralens containing a benzo-fused furan ring: A laser flash photolysis study
作者:Julio Eduardo Paiva Sena Maia、Nanci Camara de Lucas、Dari Cesarin-Sobrinho、Antonio Eduardo da Hora Machado、José Carlos Netto-Ferreira
DOI:10.1016/j.jphotochem.2016.04.013
日期:2016.7
the corresponding triplet excited state which is efficiently quenched by DABCO, triethylamine and phenols containing polar substituents. The reaction of the triplet state of 1 and 2 with electron donors (DABCO and triethylamine) leads to the formation of the corresponding anion radical whereas with phenols the corresponding aryloxyl radical was easily detected. Quenching rate constants for psoralen
为了研究苯并呋喃呋喃补骨脂素3-乙氧基羰基-2 H-苯并呋喃[2,3-e] -1-苯并吡喃-2对氢和电子供体的三重反应性,已经进行了激光闪光光解(LFP)研究。-1(1)和3-乙氧基羰基-2 H-苯并呋喃[3,2-d] -1-苯并吡喃-2-酮(2)。补骨脂素1和2的光解导致形成相应的三重激发态,其被DABCO,三乙胺和含有极性取代基的酚有效地淬灭。三重态1和2的反应用电子给体(DABCO和三乙胺)导致形成相应的阴离子基团,而使用苯酚则容易检测到相应的芳氧基基团。补骨脂素2的淬灭速率常数比1的大至少一个数量级。1和2与酚的反应的哈米特图分别得出反应常数ρ为-1.88±0.29和-1.60±0.21,这反映了两种补骨脂素的羰基具有高亲电性。