| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9577521 | Chemical Physics Letters | 2005 | 6 Pages |
Abstract
Pyrrolobenzenes, with different linking and substitution patterns, 2â²-(4-cyanophenyl)-methylpyrrole (MP2-BN) and 2â²-(2,5-cyanophenyl)-methylpyrrole (MP2-B25CN), are investigated by steady-state and time-resolved UV-Vis spectroscopy and compared to the parent compound N-pyrrolobenzonitrile (PBN). Both the electron donor-acceptor linking sites and the strength of the electron acceptor moiety are found to influence the emission characteristics of these compounds. The large radiative rate constant of MP2-BN indicates an allowed emission due to mesomeric interaction between the donor and acceptor moieties (MICT), whereas in the case of PBN and MP2-B25CN, the reduced radiative rate constant indicates a forbidden emission from a twisted intramolecular charge transfer (TICT) state.
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Authors
S. Murali, P. Changenet-Barret, C. Ley, P. Plaza, W. Rettig, M.M. Martin, R. Lapouyade,