Polyplatinayne/polyoxometalate composite Langmuir-Blodgett films: Preparation, structural characterization, and potential optoelectronic applications

Li Liu, Ling Xiang Qiao, Shi Zhong Liu, Dong Mei Cui, Chun Mei Zhang, Zheng Ji Zhou, Zu Liang Du, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

Abstract

A new family of organometallic/inorganic composite Langmuir-Blodgett (LB) films consisting of rigid-rod polyplatinayne polymer ([Pt-T(OMe-Fl)T]∞or [Pt-T(F-Fl)T]∞, where the triplet bonds are abbreviated by T, and fluorene ring by Fl) as the π-conjugated organometallic molecule, polyoxometalate (POM, POM = K3PMo12O40, H3PW12O40, or H6P2W18O62) of the Keggin and Dawson structures as the inorganic component, and dimethyldioctadecylammonium bromide (DODA) or a mixture of octadecanoic acid (OA) and docosanoic acid (DA) as the auxiliary film-forming agent were prepared and characterized by π-A isotherms, UV-Vis absorption spectra, photoluminescence spectra, atomic force microscopy imaging, scanning tunneling microscopy, and low-angle X-ray diffraction. Our experimental results indicate that steady, even, and ordered Langmuir and LB films are formed in pure water and polyoxometalate subphases. It was shown that the POM molecules are probably embedded inside the polyplatinayne molecules in the LB film structure and they can quench the luminescence of the Pt polyyne. These Pt-polyyne based LB films display interesting electric conductivity behavior. [Pt-T(OMe-Fl)T]∞/ DODAZHPW12monolayer film shows a good electrical conductivity, and the tunneling current amounts to ±100 nA when the voltage is set at ±8 V.
Original languageEnglish
Pages (from-to)3193-3206
Number of pages14
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume46
Issue number10
DOIs
Publication statusPublished - 15 May 2008
Externally publishedYes

Keywords

  • Crystal structure
  • Fluorene
  • Luminescence
  • Metal polyynes
  • Metallopolymers
  • Transition metal chemistry

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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