Delocalization of positive charge in π-stacked multi-benzene rings in multilayered cyclophanes

Mamoru Fujitsuka, Sachiko Tojo, Masahiko Shibahara, Motonori Watanabe, Teruo Shinmyozu, Tetsuro Majima

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

In the present study, delocalization of a positive charge in π-stacked multi-benzene rings in multilayered para-and meta-cyclophanes, in which benzene rings are connected by propyl chains to form a chromophore array with the face-to-face structure, was investigated by means of transient absorption spectroscopy during the pulse radiolysis using dichloroethane as a solvent. The local excitation and charge resonance (CR) bands were successfully observed. It was revealed that the CR band shifted to the longer wavelength side with the number of the benzene rings. The stabilization energy estimated from the peak position of the CR band showed the efficient charge delocalization over the cyclophanes. Furthermore, the CR bands showed the slight spectral change attributable to the change in distribution of the conformers. The substantially long lifetime of the CR band can be explained on the basis of the smaller charge distribution on the outer layers of the multilayered cyclophanes.

Original languageEnglish
Pages (from-to)741-746
Number of pages6
JournalJournal of Physical Chemistry A
Volume115
Issue number5
DOIs
Publication statusPublished - Feb 10 2011

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Delocalization of positive charge in π-stacked multi-benzene rings in multilayered cyclophanes'. Together they form a unique fingerprint.

Cite this