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Article
Facile deposition of gold nanoparticles on C60 microcrystals with unique shapes
Gold nanoparticles were densely deposited on the surface of C60 microcrystals having a variety of unique shapes. C60 microcrystals were prepared by a conventional liquid–liquid reprecipitation method. The shapes ...
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Chapter
New Class Materials of Organic–Inorganic Hybridized Nanocrystals/Nanoparticles, and Their Assembled Micro- and Nano-Structure Toward Photonics
A π-conjugated organic and polymer nanocrystal (NC) is an intermediate state between a single molecule and the corresponding bulk crystals, the size of which is usually in the range of several tens of nanomete...
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Article
Fabrication and luminescence properties of Eu-complex/polyimide composite nanoparticles
Nanoparticles composed of Eu-complex and polyimide were successfully fabricated through an improved reprecipitation method, followed by a chemical imidization. In this process, the excess addition of triethyla...
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Chapter
Fabrication of Organic Nanocrystals and Novel NanoHybrid Materials
Nonlinear optical (NLO) materials are required for the high-speed optical network systems dealing with a large amount of data. In particular, organic third-order NLO materials are powerful candidates for such ...
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Article
Fabrication and Characterization of Size- and Shape-Controlled C60 Nano/microcrystals by Solvent-Induced Reprecipitation Process (SIRP)
We have first developed useful Solvent-Induced Reprecipitation Process, and have first succeeded in fabricating C60 nano/microcrystals with various shape and size, using m-xylene and 2-propanol as good and poor s...
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Article
Solid-State Polymerization Behavior of 1,3-Bis(3-quinolyl)-1,4-butadiyne
1,4-Bis(3-quinolyl)-1,3-butadiyne (DQ) is known to be polymerized in solid state to give the corresponding polydiacetylene. However, the polymer yield of DQ bulk crystals is low. Thus, we prepared several type...
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Article
Fabrication of Polydiacetylene Nanocrystals Deposited with Silver Nanoparticles for a Nonlinear Optical Material
Noble metal-coated polydiacetylene (PDA) nanocrystals are expected to enlarge effective third-order nonlinear optical susceptibility, owing to the enhancement of optical electric field induced by localized sur...
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Article
Size-effect on Fluorescence Spectrum of Perylene Nanocrystal Studied by Single-particle Microspectroscopy Coupled with Atomic Force Microscope Observation
This paper presents single particle fluorescence spectroscopy of perylene nanocrystals coupled with AFM observation of their topographic shapes. The fluorescence spectra of individual nanocrystals confirmed cl...
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Article
Preparation and Solid-state Polymerization of Dipyridyloctatetrayne Derivatives
Three symmetrical dipyridyloctatetrayne monomers, i. e., 1,8-di(x-pyridyl)octatetrayne: x=2, 3 and 4, were synthesized and their solid-state polymerization was investigated. In addition, a salt prepared from 1,8-...
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Article
Solid-State Polymerization of Monomers Possessing Two Diphenylbutadiyne Moieties with Amido Groups to Form Ladder Polymers
Two series of monomers possessing two diphenylbutadiyne moieties connected by a methylene chain via amido groups, i.e., alkanedi{3-[4-(3-nitrophenyl)butadynyl]anilide} (N-n) and alkanedi{3-[4-(3-alkanoylaminophen...
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Article
Synthesis of Polydiacetylenes from Novel Monomers Having Two Diacetylene Units Linked by an Arylene Group
Three novel monomers 4BCMU4A(Ar) with chemical structures of R-C≡C-C≡C-Ar-C≡C-C≡O-R, where R=−(CH2)4-OCONHCH2COOC4H9 and Ar=1,4-phenylene (Ph) or 2,3,5,6-tetrafluoro-1,4-phenylene (PhF) or 4,4′-biphenylene (Biph)...
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Article
Linear and Nonlinear Optical Properties of Novel Ionic Chromophores
A series of novel ionic chromophores consisting of a carbazole moiety and pyridinium rings connected by a double bond have been designed and synthesized as nonlinear optical materials. Their linear and nonline...
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Article
Chemical and electrochemical polymerisation of diacetylenes containing thienyl moiety as the side group
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Chapter
Molecular Systems and Their Applications to Information Transduction
Information transduction using organic molecular systems opens up new aseas in the field of optoelectronic devices. Although at present inorganic materials dominate most electronic and optoelectronic devices, ...
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Article
A novel series of quinoline containing asymmetrically substituted polydiacetylenes for third-order nonlinear optical material
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Article
Synthesis of High-Tg Azo Polymer and the Optimization of its Poling Condition for Stable EO System
A new material for second-order nonlinear optics was synthesized, which was a copolymer of Ns-phenylmaleimide, 4s-isopropenylphenol and 4’s-[Ns-ethyls-Ns-(4-isopropenylphenoxyethyl) amino]s-4”s-nitroazobenzene...
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Article
Synthesis of polymers bearing azo-dye chromophore with photocrosslinkable moiety for nonlinear optics
Novel photocrosslinkable second-order nonlinear optical(NLO) polymers were synthesized from radical homopolymerization of 4-[N-ethyl-N-(2-methacryloyloxyethyl)]amino-4′-(2-cinnamoyloxyethyloxycarbonyl)-2′-nitr...
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Article
Second harmonic generation in a Langmuir monolayer of the new amphiphilic coordination compound pentacyano(4-octadecylaminopyridine)-ferrate(III)
Second harmonic generation experiments were carried out with a Langmuir film of the new amphiphilic coordination compound pentacyano(4-octadecylaminopyridine)ferrate(III) (POF), whose push-pull hydrophilic str...
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Article
Optical Third-Harmonic Generation in Polyaniline Cast Films
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Article
Structure and Optical Property of Polymers Obtained by Solid-State Polymerization of a Tetraacetylene Compound
The polydiacetylene having diacetylenic substituents has been prepared by γ-ray irradiated solid-state polymerization of 15, 17, 19, 21-hexatriacontatetrayne. It has been found that the polymer can be converte...
