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Triplet state dynamics on isolated conjugated polymer chains
Burrows, H. D.; Seixas de Melo, J.; Serpa, C.; Arnaut, L. G.; Miguel, M. da G.; Monkman, A. P.; Hamblett, I.; Navaratnam, S.http://www.sciencedirect.com/science/article/B6TFM-46MD9J0-5/1/ad58ae25c92bd62f507ea5a6a04f467d
Transient absorption spectra of triplet states and charge carriers of conjugate...
Burrows, H. D.; Miguel, M. da G.; Monkman, A. P.; Hamblett, I.; Navaratnam, S.The use of pulse radiolysis to study transient species in conjugated polymers in solutions is discussed, with particular reference to poly(2-methoxy-5-(2'-ethylhexoxy)-p-phenylenevinylene) (MEH-PPV). The excited triplet state is specifically generated by energy transfer on radiolysis of benzene solutions in the presence of suitable sensitisers, and its spectrum is reported. The presence of vibronic structure su...
Triplet state spectroscopy of conjugated polymers studied by pulse radiolysis
Monkman, A. P.; Burrows, H. D.; Miguel, M. da G.; Hamblett, I.; Navaratnam, S.Using the technique of pulse radiolysis we have elucidated the energies and kinetics of triplet states in soluble luminescent conjugated polymers. Using poly(2-methoxy,5-(2'-ethyl-hexoxy)-p-phenylenevinylene) MEH-PPV as an example we explain this technique and show how it can be used to study the triplet states in conjugated polymers. Triplet energy transfer is used to determine 11Ag-13Bu energy gaps and the ki...
The triplet state of the ladder-type methyl-poly(p-phenylene) as seen by pulse ...
Monkman, A. P.; Burrows, H. D.; Hamblett, I.; Navaratnam, S.; Scherf, U.; Schmitt, C.The lowest triplet state of a ladder poly(p-phenylene) (MeLPPP) has been produced by sensitised energy transfer following pulse radiolysis of benzene solution, and absorbs at 1.34 eV with a lifetime [greater-or-equal, slanted]170 [mu]s. An S0-T1 energy separation of 2.15 ± 0.07 eV was determined, in excellent agreement with recent phosphorescence measurements, confirming the validity of the technique for the de...
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