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2006 Fiscal Year Final Research Report Summary

Control of Photoluminescence properties of semiconductor nanoparticles through the design of surface pi-functionalities

Research Project

Project/Area Number 17350062
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional materials chemistry
Research InstitutionHokkaido University

Principal Investigator

KONISHI Katsuaki  Hokkaido Univ. Fac. of Env. Earth Sci., Asso. Prof., 大学院地球環境科学研究院, 助教授 (80234798)

Project Period (FY) 2005 – 2006
KeywordsEnivoronmental materials / Molecular recognition / supramolecular chemistry / semiconductor nanoparticles
Research Abstract

Semiconductor nanoclusters of cadmium chalcogenides have been of great interest due to their characteristic photoluminescence (PL) properties. These clusters usually bear multiple surface capping modules that potentially server as guest binding sites. Recently we have reported that Cd_10S_4(SPh)_12 (1) with twelve surface phenyl groups the easily form ionic complexes with quaternary ammonium bromide by coordination of bromide anions to the apex cadmium atoms. We have also shown that small cations such as cetyltrimethylammonium ion (CTA^+) are intercalated among the surface phenyl groups of 1 through cation-pi interaction and such intercalative binding causes notable positive response of the cluster PL. In this project we investigated the effects of electron withdrawing and donating substituents attached to the surface phenyl groups of 1 on the cluster optical properties. When electron-withdrawing substituents, such as ester and chloro, were introduced, the cluster PL band was shifted to a higher energy (blue shift) and the quantum yield was increased. In contrast, when electron-donating substituents, such as methoxy and methyl, the PL band was reduced and red-shifted. We also investigated the PL response of an analogous cluster with hydrophilic substituents towards metal ions in aqueous solutions.

  • Research Products

    (4 results)

All 2006

All Journal Article (4 results)

  • [Journal Article] Turn-on and Selective Luminescence Sensing of Copper ion by a Water-soluble Cd10S16 Molecular Cluster2006

    • Author(s)
      Katsuaki Konishi
    • Journal Title

      Angewandte Chemie International Edition 45・31

      Pages: 5191

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Electric-Field-Induced Changes in Absorption and Emission Spectra of CdS Nanoparticles Doped in a Polymer Film2006

    • Author(s)
      Yuhki Ohara
    • Journal Title

      Journal of Physical Chemistry B 110・42

      Pages: 20927

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Turn-on and Selective Luminescence Sensing of Copper ion by a Water-soluble Cd10S16 Molecular Cluster2006

    • Author(s)
      Katsuaki Konishi, Takayuki Hiratani
    • Journal Title

      Angewandte Chemie International Edition 45

      Pages: 5191

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Electric-Field-Induced Changes in Absorption and Emission Spectra of CdS Nanoparticles Doped in a Polymer Film2006

    • Author(s)
      Yuhki Ohara, Takakazu Nakabayashi, Kentaro Iwasaki, Tsukasa Torimoto, Bunsho Ohtani, Takayuki Hiratani, Katsuaki Konishi, Nobuhiro Ohta
    • Journal Title

      J. Phys. Chem. B. 110

      Pages: 20927

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2008-05-27  

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