Mayorga Burrezo, Paula, Lin, Nai-Ti, Nakabayashi, Koji, Ohkoshi, Shin-ichi, Calzado Estepa, Eva María, Boj, Pedro G., Díaz-García, María A., Franco, Carlos, Rovira, Concepciò, Veciana, Jaume, Moos, Michael, Lambert, Christoph, López Navarrete, Juan T., Tsuji, Hayato, Nakamura, Eiichi, Casado, Juan
Bis(aminoaryl) Carbon-Bridged Oligo(phenylenevinylene)s Expand the Limits of Electronic Couplings
Angewandte Chemie International Edition. 2017, 56(11): 2898-2902. doi:10.1002/anie.201610921
URI: http://hdl.handle.net/10045/66520
DOI: 10.1002/anie.201610921
ISSN: 1433-7851 (Print)
Abstract: 
Carbon-bridged bis(aminoaryl) oligo(para-phenylenevinylene)s have been prepared and their optical, electrochemical, and structural properties analyzed. Their radical cations are class III and class II mixed-valence systems, depending on the molecular size, and they show electronic couplings which are among the largest for the self-exchange reaction of purely organic molecules. In their dication states, the antiferromagnetic coupling is progressively tuned with size from quinoidal closed-shell to open-shell biradicals. The data prove that the electronic coupling in the radical cations and the singlet–triplet gap in the dications show similar small attenuation factors, thus allowing charge/spin transfer over rather large distances.
Keywords:Absorption, Charge transfer, Oligomerization, Radicals, Structure determination
Wiley-VCH Verlag GmbH & Co. KGaA
info:eu-repo/semantics/article