The photosensitized triplet behavior of benzophenone (BP) and energy transfer from BP to naphthylalkanes were studied by nanosecond laser flash photolysis in benzene. After deoxygenation, the BP solution is excited with a 355-nm laser pulse, and its T1 ?Tn absorption band appeared around 530 nm with a decay time (triplet lifetime) of ~2.7 ms. None of the 3 naphthylalkanes can be excited with 355-nm laser light directly. After BP is added, the new T1 ?Tn absorption bands of the naphthylalkanes appear between 400 and 440 nm. The T1 ?Tn absorption of naphthylalkanes increased following the quenching of the T1 ?Tn absorption of BP. In these photosensitized processes, the triplet energy transfer efficiency and transfer constant were calculated

Key words: DIPHENYLMETHANONE, PHOTOSENSITIZATION, ABSORPTION SPECTROMETRY, MOLECULAR STRUCTURE, NAPHTHALENE P, NAPHTHALENE P, CARBOXYLIC ACID ESTER, ALKANE P, ENERGY TRANSFER, ACETIC ACID P