Self-assembly and Langmuir-Blodgett (LB) film of a novel hydrogen-bonded complex: A surface enhanced Raman scattering (SERS) study

Xueliang Hou, Lixin Wu, Weiqing Xu, Lidong Qin, Chengshan Wang, Xi Zhang, Jiacong Shen

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Hydrogen-bonded complexes composed of a 1,2-bis(4-pyridyl)ethylene and two fatty acids were employed for the fabrication of organized monolayers. Surface enhanced Raman scattering (SERS) spectra demonstrated that monolayer Langmuir-Blodgett (LB) film could be directly obtained at surface pressure 5 mN m -1 by depositing the complex with one of its hexadecoic acid molecules lost due to decomposition of hydrogen bond. For the self-assembled monolayer, SERS spectra indicated that during self-assembling process, only one part of the complex was adsorbed on silver substrate, just similar to that occurring at air/water interface due to the same reason. Increasing the molar ratio of the hexadecoic acid to the mole of 1,2-bis(4-pyridyl)ethylene in the complex solution up to 16-fold, we successfully prepared a monolayer of the complex without decomposition. Under this condition the 1,2-bis(4-pyridyl)-ethylene was inferred to adopt the adsorption flat on the substrate.

Original languageEnglish (US)
Pages (from-to)135-140
Number of pages6
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume198-200
DOIs
StatePublished - Feb 18 2002

Keywords

  • 1,2-bis(4-Pyridyl)ethylene
  • Hydrogen-bonded complex
  • Self-assembly
  • SERS

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

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