Preparation, luminescence and photoelectric properties of Langmuir-Blodgett films of alkynylplatinum(II)-zinc(II) porphyrinate/heteropolyoxometalate hybrid composites

Li Liu, Lei Hu, Hui Fu, Qiao Min Fu, Shi Zhong Liu, Zu Liang Du, Wai Yeung Wong, Pierre D. Harvey

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

A new class of organometallic/inorganic hybrid Langmuir-Blodgett (LB) films, consisting of rigid-rod alkynylplatinum(II)-zinc(II) porphyrinate complex (OMA) as the π-conjugated donor-acceptor-type molecule and tungsto(molybdo)phosphoric heteropolyacids (HPA) (HPA = H3PMo12O40and H3PW12O40, abbreviated as HPMo12and HPW12, respectively) of the Keggin structure as the inorganic component, were prepared and characterized by π-A isotherms, UV-vis absorption and luminescence spectra, low-angle X-ray diffraction, scanning tunneling microscopy and surface photovoltage spectroscopy. Our experimental results indicate that stable, well-defined and well-organized Langmuir and LB films have been formed in pure water and heteropolyacid subphase. They typically have a highly organized lamellar structure in which a monolayer of HPA is most likely embedded inside the OMA molecular space formed by long chains of PBu3. Luminescence spectra of these hybrid LB films show that HPMo12and HPW12can enhance the emission of OMA to some extent. These LB composites show good photovoltage responses and a photovoltage of 79 μV can be obtained for the OMA/HPMo12system when it is excited by light. The monolayer LB films on ITO wafer can also display interesting electrical conductivity.
Original languageEnglish
Pages (from-to)1319-1324
Number of pages6
JournalJournal of Organometallic Chemistry
Volume696
Issue number6
DOIs
Publication statusPublished - 15 Mar 2011
Externally publishedYes

Keywords

  • Alkyne
  • Heteropolyacid
  • Photoluminescence
  • Platinum
  • Porphyrin
  • Zinc

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this