Triplet state properties of N-mTEG[60]fulleropyrrolidine mono and bisadduct derivatives

Laser flash photolysis and pulse radiolysis techniques were used to determi ne triplet stale properties of N-mTEG[60]fulleropyrrolidine mono and bisadd uct derivatives (FP) (mTEG = CH2CH2OCH2CH2OCH2CH2OCH3) in benzene. These pr operties include the triplet absorption spectra between 550 and 900 nm, qua ntum yields of triplet photosensitized singlet oxygen production (Phi (Delt a)) and triplet molar absorption coefficients (epsilon (T)) With the assump tion that the quantum yield of triplet formation (Phi (T)) is equal to Phi (Delta). Our results demonstrate that the triplet properties depend on the number of addends and the addition pattern. (C) 2001 Elsevier Science B.V. All rights reserved.