Direct observation of the intermolecular triplet-triplet energy transfer from UV-A absorber 4-tert-butyl-4 '-methoxydibenzoylmethane to UV-B absorber octyl methoxycinnamate

作者：Kikuchi Azusa^*; Yagi Mikio

来源：Chemical Physics Letters, 2011, 513(1-3): 63-66.

DOI：10.1016/j.cplett.2011.07.067

Triplet energy transfer (TET) is an important photostabilization process for organic UV absorbers, such as 4-tert-butyl-4'-methoxydibenzoylmethane (BM-DBM) and octyl methoxycinnamate (OMC). To characterize interactions between UV absorbers as TET the interactions between BM-DBM and OMC have been studied through measurements of EPR and time-resolved phosphorescence spectra. The EPR B(min) signals and the phosphorescence of OMC were observed through the selective excitation of BM-DBM at 365 nm in EtOH at 77 K. These results indicate that the intermolecular TET occurs from BM-DBM to OMC. This is the first report of the experimental evidence of the TET between the organic UV absorbers.

• 出版日期2011-9-6