Reactions and orientational control of organic nanocrystals

Shuji Okada, Hidetoshi Oikawa

    Research output: Chapter in Book/Report/Conference proceedingChapter


    Organic nanocrystals can be prepared by the reprecipitation method. The solid-state reactions within the nanocrystals and the reactions on the nanocrystal surfaces were investigated. In the nanocrystals, strain accumulated during the solidstate reactions can be released by the deformation of the shape, and Single-Crystalto- Single-Crystal transformation was achieved. In the Solid-State polymerization, the size of monomer nanocrystals was closely related to the molecular weight of the resulting polymers. Radical attacks on crystal surfaces were found to stimulate the Solid-State chain polymerization. By using excitation of the compound in the nanocrystals, metal cations can be selectively reduced on the crystal surfaces. Orientation control of nanocrystals using electric and magnetic fields was investigated. Nanocrystalswere successfully oriented according to the crystal structures, in which molecules specifically interacted with the external fields. Degree of polar orientation by a DC electric field could be improved by assistance of a DC magnetic field. Solidification of the dispersion media realized fixation of nanocrystal orientation to generate permanent macroscopic anisotropy.

    Original languageEnglish
    Title of host publicationAdvances in Organic Crystal Chemistry
    Subtitle of host publicationComprehensive Reviews 2015
    PublisherSpringer Japan
    Number of pages17
    ISBN (Electronic)9784431555551
    ISBN (Print)9784431555544
    Publication statusPublished - 2015 Aug 6


    • Field orientation
    • Organic nanocrystal
    • Solid-State reaction
    • Surface reaction

    ASJC Scopus subject areas

    • Chemistry(all)
    • Engineering(all)
    • Physics and Astronomy(all)


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