Triplet Photophysics Of Polystyrene With And Without Selected Terminating Substituents

Richard D. Burkhart; Jon A. J. Burrows; Gregory W. Haggquist

doi:10.1117/12.951550

17 May 1989 Triplet Photophysics Of Polystyrene With And Without Selected Terminating Substituents

Richard D. Burkhart, Jon A. J. Burrows, Gregory W. Haggquist

Proceedings Volume 1054, Fluorescence Detection III; (1989) https://doi.org/10.1117/12.951550
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Polystyrene molecules selectively terminated with an acetophenone-like (AC) group at one end and a naphthyl group at the opposite end have been prepared and their triplet photophysics investigated. Photoexcitation of solid films of these polymers using a nitrogen laser (337 nm) yields phosphorescence bands attributable to the AC group and the naphthalene group. Using 337 nm excitation and viewing the emission at 0.1 msec after the excitation pulse, a broad phosphorescence band overlaps the AC signal. At longer delay times the typical structured AC emission emerges if the sample temperature is at 77 K but at ambient temperature the broad band persists. Apparently the AC emission is inhomogeneously broadened with an inhomogeneous band width large enough so that spectral diffusion can occur at 77 K. Luminescence decay kinetics provide information about possible modes of energy transfer from initially excited AC species to the naphthyl group.

Citation Download Citation

Richard D. Burkhart, Jon A. J. Burrows, and Gregory W. Haggquist "Triplet Photophysics Of Polystyrene With And Without Selected Terminating Substituents", Proc. SPIE 1054, Fluorescence Detection III, (17 May 1989); https://doi.org/10.1117/12.951550

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