Hybrid gold-nanoparticle-cored conjugated thiophene dendrimers: Synthesis, characterization, and energy-transfer studies

Suxiang Deng, Timothy M. Fulghum, Greg Krueger, Derek Patton, Jin Young Park, Rigoberto C. Advincula

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22 Citations (Scopus)

Abstract

A series of hybrid Au-nanoparticle-dendrimer materials: nanoparticle-cored thiophene dendrimers (NCTDs) were synthesized, characterized, and investigated for their energy-transfer properties. These hybrid nanoparticles were obtained by the simultaneous and in situ reduction of gold(III) chloride and self-assembly of the thiol-containing thiophene dendritic ligands. The dendron ligands were radially attached to the gold nanoparticles and were analyzed by TEM, UV/Vis, 1H NMR, and FTIR spectroscopies. The solution fluorescence of the attached thiophene dendrons are quenched progressively. Both alkyl-chain length and dendron size have significant influence on the energy-transfer efficiency, as well as on core sizes and size distribution of the Au nanoparticles. In spite of the phenomenon's dependence on nanoparticle size, the energy transfer generally follows the 1/d2 distance dependence. Single NCTD nanoparticles were also adsorbed on highly ordered pyrolytic graphite (HOPG) and uniform aggregates were observed on mica flat substrates.

Original languageEnglish
Pages (from-to)8929-8940
Number of pages12
JournalChemistry - A European Journal
Volume17
Issue number32
DOIs
Publication statusPublished - 2011 Aug 1
Externally publishedYes

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Keywords

  • dendrimers
  • emission
  • energy transfer
  • hybrids
  • nanoparticles

ASJC Scopus subject areas

  • Chemistry(all)

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