Formation and decay of exciplexes between 9-cyanophenanthrene and mono- and diaminoalkanes

Siegfried Schneider; Peter Geiselhart; Günter Seel; Frederick D Lewis; Ruth E. Dykstra; Marshall J. Nepras

doi:10.1021/j100345a047

Formation and decay of exciplexes between 9-cyanophenanthrene and mono- and diaminoalkanes

Siegfried Schneider^*, Peter Geiselhart, Günter Seel, Frederick D Lewis, Ruth E. Dykstra, Marshall J. Nepras

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

The interaction of singlet 9-cyanophenanthrene with mono- and diaminoalkanes in hexane solution yields weakly fluorescent exciplexes. Whereas the fluorescence quenching constant for 9-cyanophenanthrene is nearly the same for all mono- and diamines (1.5 × 10¹⁰ M^-1 s^-1), the lifetime of the exciplexes appears to be highly dependent upon the diamine chain length. The pronounced shortening of the exciplex lifetimes from about 15 ns to 300 ps for diamines with less than five methylene groups is interpreted in terms of the formation of a triplex between the 9-cyanophenanthrene anion radical and a σ-bonded amine dimer cation radical.

Original language	English (US)
Pages (from-to)	3112-3117
Number of pages	6
Journal	Journal of Physical Chemistry
Volume	93
Issue number	8
DOIs	https://doi.org/10.1021/j100345a047
State	Published - Jan 1 1989

ASJC Scopus subject areas

General Engineering
Physical and Theoretical Chemistry

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title = "Formation and decay of exciplexes between 9-cyanophenanthrene and mono- and diaminoalkanes",

abstract = "The interaction of singlet 9-cyanophenanthrene with mono- and diaminoalkanes in hexane solution yields weakly fluorescent exciplexes. Whereas the fluorescence quenching constant for 9-cyanophenanthrene is nearly the same for all mono- and diamines (1.5 × 1010 M-1 s-1), the lifetime of the exciplexes appears to be highly dependent upon the diamine chain length. The pronounced shortening of the exciplex lifetimes from about 15 ns to 300 ps for diamines with less than five methylene groups is interpreted in terms of the formation of a triplex between the 9-cyanophenanthrene anion radical and a σ-bonded amine dimer cation radical.",

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T1 - Formation and decay of exciplexes between 9-cyanophenanthrene and mono- and diaminoalkanes

AU - Schneider, Siegfried

AU - Geiselhart, Peter

AU - Seel, Günter

AU - Lewis, Frederick D

AU - Dykstra, Ruth E.

AU - Nepras, Marshall J.

PY - 1989/1/1

Y1 - 1989/1/1

N2 - The interaction of singlet 9-cyanophenanthrene with mono- and diaminoalkanes in hexane solution yields weakly fluorescent exciplexes. Whereas the fluorescence quenching constant for 9-cyanophenanthrene is nearly the same for all mono- and diamines (1.5 × 1010 M-1 s-1), the lifetime of the exciplexes appears to be highly dependent upon the diamine chain length. The pronounced shortening of the exciplex lifetimes from about 15 ns to 300 ps for diamines with less than five methylene groups is interpreted in terms of the formation of a triplex between the 9-cyanophenanthrene anion radical and a σ-bonded amine dimer cation radical.

AB - The interaction of singlet 9-cyanophenanthrene with mono- and diaminoalkanes in hexane solution yields weakly fluorescent exciplexes. Whereas the fluorescence quenching constant for 9-cyanophenanthrene is nearly the same for all mono- and diamines (1.5 × 1010 M-1 s-1), the lifetime of the exciplexes appears to be highly dependent upon the diamine chain length. The pronounced shortening of the exciplex lifetimes from about 15 ns to 300 ps for diamines with less than five methylene groups is interpreted in terms of the formation of a triplex between the 9-cyanophenanthrene anion radical and a σ-bonded amine dimer cation radical.

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Formation and decay of exciplexes between 9-cyanophenanthrene and mono- and diaminoalkanes

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