Geometric influence on intramolecular photoinduced electron transfer in platinum(II) acetylide-linked donor-acceptor assemblies

Molina-Ontoria A, Rivera-Nazario DM, Tigreros A, Ortiz A, Nunez JE, Insuasty B, Lüders D, Wolfrum S, Guldi DM, Echegoyen L (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Chemistry - A European Journal Wiley

Book Volume: 20

Pages Range: 11111-11119

Journal Issue: 35

DOI: 10.1002/chem.201402616

Abstract

A new donor-acceptor system, in which the electron donor triphenylamine (TPA) and the electron acceptor C60 are bridged through a cis- or trans-platinum(II) acetylide spacer have been prepared. Ground-state studies were conducted using electrochemistry and UV/Vis spectroscopy. Fluorescence studies suggested that charge transfer is the deactivation mechanism for the singlet excited state, and this was verified by transient absorption spectroscopy. Selective photoexcitation of 1 and 2 at 387 nm leads to a fast charge transfer between the TPA and C60, which gives rise to a radical ion-pair state (TPA.+-Pt-C60.-). Our results suggest that charge transfer is favored for the cis configuration while the presence of the trans configuration in the PtII diacetylide results in a longer-lived charge separated states. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Authors with CRIS profile

Daniela Lüders Lehrstuhl für Physikalische Chemie I Silke Wolfrum Lehrstuhl für Physikalische Chemie I Dirk Michael Guldi Lehrstuhl für Physikalische Chemie I

Involved external institutions

The University of Texas at El Paso US United States (USA) (US) University of Valle / Universidad del Valle (Univalle) CO Colombia (CO)

How to cite

APA:

Molina-Ontoria, A., Rivera-Nazario, D.M., Tigreros, A., Ortiz, A., Nunez, J.E., Insuasty, B.,... Echegoyen, L. (2014). Geometric influence on intramolecular photoinduced electron transfer in platinum(II) acetylide-linked donor-acceptor assemblies. Chemistry - A European Journal, 20(35), 11111-11119. https://doi.org/10.1002/chem.201402616

MLA:

Molina-Ontoria, Agustin, et al. "Geometric influence on intramolecular photoinduced electron transfer in platinum(II) acetylide-linked donor-acceptor assemblies." Chemistry - A European Journal 20.35 (2014): 11111-11119.

BibTeX: Download