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Dipole reversal in Langmuir–Blodgett films of an optically nonlinear dye and its effect on the polarity for molecular rectification

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<mark>Journal publication date</mark>2005
<mark>Journal</mark>Journal of Materials Chemistry
Issue number39
Volume15
Number of pages3
Pages (from-to)4203-4205
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

Langmuir–Blodgett (LB) films of isomeric donor–(π-bridge)–acceptor molecules with either a hydrophobically substituted acceptor [D–π–A–C16H33 (1)] or donor [A–π–D–C16H33 (2)] exhibit second-harmonic generation and asymmetric current–voltage characteristics: a reversed polarity for rectification arises from an inversion of the dipole orientations in the two types of monolayer.