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Rev. Sci. Instrum. 69, 2875 (1998); http://dx.doi.org/10.1063/1.1149028 (13 pages)

Advances in the transient dc photocurrent technique for excited state dipole moment measurements

Sergei N. Smirnov and Charles L. Braun

Department of Chemistry, Dartmouth College, 6128 Burke Laboratory, Hanover, New Hampshire 03755

(Received 27 February 1998; accepted 17 April 1998)

Recent advances in the transient dc photocurrent technique for measuring excited state dipole moments, developed in our group, are discussed. A variety of approaches with detailed analyses of their advantages and disadvantages including cell design, circuit construction tricks, the data acquisition procedure, calibration, and the theoretical treatment of different conditions, are presented. Sensitivity, time resolution limitations, and newly developed features, such as the signal’s dependence on light polarization as well as charge separation at interfaces are outlined. Dipole moments of a few molecules (diphenylcyclopropenone, bianthryl, dimethylaminonitrostilbene, Coumarin 153, and fluoroprobe) suitable for calibration purpose are reported—some of them for the first time. © 1998 American Institute of Physics.

© 1998 American Institute of Physics

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KEYWORDS and PACS

PACS

  • 33.15.Kr

    Electric and magnetic moments (and derivatives), polarizability, and magnetic susceptibility

  • 72.40.+w

    Photoconduction and photovoltaic effects

  • 31.50.Df

    Potential energy surfaces for excited electronic states

  • 07.77.-n

    Atomic, molecular, and charged-particle sources and detectors

ARTICLE DATA

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

For access to fully linked references, you need to log in.
    H. T. Choi, D. S. Sethi, and C. L. Braun, J. Chem. Phys. 77, 6027 (1982)JCPSA6000077000012006027000001.


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