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Dynamic quenching of 5‐(2′‐ethyl‐hexyloxy)‐ p ‐phenylene vinylene (MEH‐PPV) by charge transfer to a C 60 derivative in solution
Author(s) -
Wang Jian,
Wang Deli,
Moses Daniel,
Heeger Alan J.
Publication year - 2001
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.2106
Subject(s) - quenching (fluorescence) , phenylene , acceptor , derivative (finance) , luminescence , diffusion , materials science , fluorescence , activation energy , photochemistry , polymer chemistry , polymer , chemistry , analytical chemistry (journal) , thermodynamics , physics , organic chemistry , optics , optoelectronics , financial economics , economics , condensed matter physics
The fluorescence of 5‐(2′‐ethyl‐hexyloxy)‐ p ‐phenylene vinylene (MEH‐PPV) quenched in solution in 1,2‐dichlorobenzene by a soluble derivative of C 60 [1‐(3‐methoxycarbonyl)propyl‐1‐phenyl[6,6]C 61 ; [6,6]PCBM] is studied by changing the concentration of the quencher and by varying the temperature. For MEH‐PPV and PCBM dissolved in 1,2‐dichlorobenzene, the Stern–Volmer constant (K SV ) is 2 × 10 3 M −1 . At high temperature, K SV is enhanced because thermal energy facilitates the diffusion of PCBM. The results show that dynamic quenching (rather than static quenching) is the basic mechanism. Comparison with data obtained from quenching studies of trans ‐stilbene indicates that a single acceptor in contact with an MEH‐PPV macromolecule quenches the luminescence from hundreds of repeat units. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2553–2557, 2001