Time resolve study on isopropyl-ether porphyrindiol

Abstract

A novel fat-soluble porphyrin derivative——isopropyl-ether porphyrindiol (IPEP) has been investigated using the nanosecond laser photolysis and pulse radiolysis. In acetonitrile, IPEP-excited triplet state shows two relative absorption areas peaking at 320 and 430 nm, molar extinction coefficients by energy transfer method (in benzene solution) are proved to be e (315) = 1.07×10 5 , e (450) = 3.3×10 4 L 3 ·mol -1 ·cm -1 and the excited triplet state quantum yield by comparative method is 0.18. Laser photolysis of IPEP in dGMP-containing solution shows that the triplet state cannot excite/oxidize dGMP via the energy/electron transfer process.