TY - JOUR
T1 - Photophysical properties of pyrrolobenzenes with different linking and substitution pattern
T2 - The transition between charge transfer states with large (MICT) and small (TICT) resonance interaction
AU - Murali, S.
AU - Changenet-Barret, P.
AU - Ley, C.
AU - Plaza, P.
AU - Rettig, W.
AU - Martin, M. M.
AU - Lapouyade, R.
PY - 2005/8/5
Y1 - 2005/8/5
N2 - Pyrrolobenzenes, with different linking and substitution patterns, 2′-(4-cyanophenyl)-methylpyrrole (MP2-BN) and 2′-(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.
AB - Pyrrolobenzenes, with different linking and substitution patterns, 2′-(4-cyanophenyl)-methylpyrrole (MP2-BN) and 2′-(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.
U2 - 10.1016/j.cplett.2005.06.019
DO - 10.1016/j.cplett.2005.06.019
M3 - Article
AN - SCOPUS:22544445595
SN - 0009-2614
VL - 411
SP - 192
EP - 197
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-3
ER -