Raman Study of Mixed-Stack Charge Transfer Films of 2-Octadecyl-7,7,8,8-Tetracyanoquinodimethane and 3,3′,5,5′-Tetramethylbenzidine Prepared by the Langmuir-Blodgett Technique and Donor Doping

Young Mee Jung, Shin Ichi Morita, Masanobu Ogane, Teruki Ikeda, Hideo Tashiro, Yukihiro Ozaki

Research output: Contribution to journalArticlepeer-review

Abstract

Raman, FT-Raman and ultraviolet-visible-near infrared (UV-vis-NIR) spectra have been measured for mixed-stack charge transfer (CT) films of 2-octadecyl-7,7,8,8-tetracyanoquinodimethane (octadecyl-TCNQ) doped with 3,3′,5,5′-tetramethylbenzidine (TMB) deposited on CaF2 plates and Au-evaporated glass slides. The 1064 nm-excited FT-Raman spectra can be observed clearly even for the one-layer CT films deposited on CaF2 plates because the excitation wavelength is located within a broad CT band centered near 1550 nm. The degree of the charge transfer determined by a shift of the C≡N stretching band of the TCNQ chromophore suggests that the CT complex films are in a quasi-neutral state.

Original languageEnglish
Pages (from-to)225-228
Number of pages4
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume327
DOIs
Publication statusPublished - 1999 Jan 1
Externally publishedYes

Keywords

  • Charge transfer
  • Langmure-Blodgett films
  • Raman spectroscopy
  • Tetracyanoquinodimethane

ASJC Scopus subject areas

  • Condensed Matter Physics

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