RT Journal Article
T1 Fingerprints of Through-Bond and Through-Space Exciton and Charge Conjugations in Linearly Extended [2,2]Paracyclophanes
A1 Zafra, José L.
A1 Molina Ontoria, Agustín
A1 Mayorga Burrezo, Paula
A1 Peña Avarez, Miriam
A1 Samoc, Marek
A1 Szeremeta, Janusz
A1 Ramínez, Francisco J.
A1 Lovander, Matthew D.
A1 Droske, Christopher J.
A1 Pappenfus, Ted M.
A1 Echegoyen, Luis
A1 López Navarrete, Juan T.
A1 Martín, Nazario
A1 Casado, Juan
AB New stilbenoid and thiophenic compounds terminally functionalized with donor-donor, acceptor-acceptor and donoracceptor moieties and substituting a central [2,2]paracyclophane unit have been prepared and their properties interpreted in terms of through-bond and through space conjugations. A description of the excited state properties based on photophysical data and with focus on the participation of the central [2,2]paracyclophane, or “phane” state, in competition with through-bond conjugation in the arms has been conducted. To this end, one-photon absorption and emission spectroscopy, as a function of temperature, of solvent polarity in solution and of pressure in solid state have been carried out. Furthermore, the analysis of charge delocalization in the face-toface [2,2]paracyclophane part in the neutral state and in the oxidized species (dications and trications) has been assessed allowing to elucidate the vibrational Raman fingerprint of charge delocalization in these systems. Thus, a complementary approach to “intermolecular” excitation and charge delocalization has been presented in [2,2]paracyclophane model systems by means of the pertinent spectroscopic techniques.
PB ACS
SN 0002-7863 (Print) 1520-5126 (Online)
YR 2017
FD 2017-02
LK https://hdl.handle.net/20.500.14352/18371
UL https://hdl.handle.net/20.500.14352/18371
LA eng
NO Unión Europea. FP7
NO Ministerio de Economía y Competitividad (MINECO)
NO Comunidad de Madrid
NO Junta de Andalucia
NO U.S. National Science Foundation
NO the National Science Centre
NO Robert A. Welch Foundation
DS Docta Complutense
RD 11 abr 2025