Multistep photoinitiated charge separation in a molecular pentad

Thomas Moore, Devens Gust, Ana Moore, Seung Joo Lee, Edith Bittersmann, David K. Luttrull, Janice M. DeGraziano, Xiaochun C. Ma, Feng Gao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Pentads consisting of a diporphyrin moiety bearing both a carotenoid polyene and a diquinone are studied. It is shown that excitation of the porphyrin leads to the formation of a charge separated state with a quantum yield as high as 0.83 and a lifetime up to 340 μs, depending upon the structure of the pentad. The final charge separated state preserves over one-half of the initial excitation energy as chemical potential. This fact, coupled with the length of the molecules (ca. 80 angstrom), makes such photovoltaic species attractive candidates for incorporation into molecular electronic devices.

Original languageEnglish (US)
Title of host publicationBiomedical Engineering Perspectives
Subtitle of host publicationHealth Care Technologies for the 1990's and Beyond
PublisherPubl by IEEE
Pages1737-1738
Number of pages2
Editionpt 4
ISBN (Print)0879425598
StatePublished - 1990
EventProceedings of the 12th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Philadelphia, PA, USA
Duration: Nov 1 1990Nov 4 1990

Publication series

NameProceedings of the Annual Conference on Engineering in Medicine and Biology
Numberpt 4
ISSN (Print)0589-1019

Other

OtherProceedings of the 12th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
CityPhiladelphia, PA, USA
Period11/1/9011/4/90

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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