| 高分子 Vol.60 No.6 |
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特集 金属材料と有機材料の精密融合
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| 展望 COVER STORY: Highlight Reviews |
| 高分子を担体とする金クラスターの触媒作用 Catalysis by Gold Clusters Supported on Polymers |
石田 玉青・春田 正毅 Tamao ISHIDA and Masatake HARUTA |
| ＜要旨＞ 金は化学的活性に乏しいが，直径5
nm以下のナノ粒子にして卑金属酸化物上に担持すると低温で触媒作用を発現する。高分子を担体とするときは直径2 nm以下のクラスターとすれば，液相反応で優れた触媒特性を示す。また，高分子繊維表面を無機酸化物微粒子で被覆し，その上に金ナノ粒子を分散・固定したソフトな触媒材料の開発も進んでいる。 Keywords: Gold Nanoparticles / Gold Clusters / Polymer Supports / Catalysis / Alcohol Oxidation / N-Alkylation |
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| 熱応答性磁性ナノ粒子のバイオ分野への応用 Thermo-Responsive Magnetic Nanoparticles for Biomedical Applications |
近藤 昭彦・大西 徳幸 Akihiko KONDO and Noriyuki OHNISHI |
| ＜要旨＞ 刺激応答性高分子と磁性ナノ粒子の融合により，粒子径が100
nm程度の新しいタイプの刺激応答性磁性ナノ微粒子を創製し，これに生体分子を固定化した高機能複合材料の開発が活発に行われている。本稿ではとくに熱応答性磁性ナノ粒子を中心に，その開発の現状と，多様なバイオ分野（バイオ計測や医療分野）への応用について紹介する。 Keywords: Magnetic Nanoparticles / Thermo-Responsive Polymers / Biomedical Measurements / Bioseparations / Drug Delivery Systems / Biomedical Applications |
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| デンドリマー内での金属微粒子の合成と機能 Precise Synthesis of Metal Clusters in a Dendrimer Template |
今岡 享稔・山元 公寿 Takane IMAOKA and Kimihisa YAMAMOTO |
| ＜要旨＞ 単一の分子量・構造をもち，金属錯体の数を決めて精密に集積できるデンドリマーは，金属および金属酸化物微粒子（ナノ粒子）合成のテンプレートとして機能する。1
nm以下の粒径で精密合成されたサブナノ粒子は一般的なナノ粒子（1 nm以上）とは大きく異なる特性を示す。 Keywords: Dendrimers / Phenylazomethines / Metal Complexes / Supramolecules / Metal Clusters / Metal Oxide Clusters / Catalysis / Quantum-Size Effect |
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| 水中における配位高分子のアダプティブな自己組織化と機能性ナノ粒子の形成 Adaptive Self-Assembly of Coordination Nanoparticles Formed in Aqueous Media and Their Functions |
西藪 隆平・君塚 信夫 Ryuhei NISHIYABU and Nobuo KIMIZUKA |
| ＜要旨＞ 金属イオンと多官能性配位子を有機溶媒あるいは水中で混合すると，配位ネットワークからなるナノ粒子が得られる。これらのナノ粒子は，配位子と金属イオンの組み合わせに応じて多彩な機能を示す。本稿では水中におけるランタニドイオンとヌクレオチドの自発的なナノ粒子の形成，ならびにそれらが示す特性と適応型の自己集積現象について紹介する。 Keywords: Self-Assembly / Adaptive Self-Assembly / Nanoparticles / Coordination Polymer |
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| トピックス COVER STORY:Topics and Products |
| イオン液体に高分散した金属ナノ粒子の合成と光機能材料への応用 Preparation of Metal Nanoparticles Highly-Dispersed in Ionic Liquids and Their Application to Photo-Functional Materials |
岡崎 健一・鳥本 司 Ken-ichi OKAZAKI and Tsukasa TORIMOTO |
| ＜要旨＞ Ionic liquids
(ILs) have an extremely low vapor pressure that enables the handling
of ILs under vacuum. The sputter deposition of gold onto ILs resulted
in the formation of a solution containing highly dispersed Au nanoparticles.
Thus-obtained nanoparticles were densely immobilized on a glass substrate
surface-modified with imidazole functional groups. Photoexcitation of
the surface plasmon resonance peak of Au particle films caused enhancement
of the photoluminescence of CdTe quantum dots. Keywords: Ionic Liquid / Nanoparticles / Sputter Deposition / Surface Plasmon |
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| 金属錯体が形成するナノ空間内での高分子合成・物性 Coordination Nanospaces for Controlling Polymer Synthesis and Properties |
植村 卓史 Takashi UEMURA |
| ＜要旨＞ Metal-Organic
Frameworks composed of metal ions and organic ligands have been extensively
studied. Use of their regulated and tunable nanochannels for a field
of polymerization allows multi-level controls of polymerization. In addition,
polymers confined in these channels show unique properties based on only
a few-chain assembly. Keywords: Metal Organic Frameworks / Nanochannel / Controlled Polymerization / Polymer Property |
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| 高規則性陽極酸化ポーラスアルミナによる膜乳化 Membrane Emulsification Using Anodic Porous Alumina |
柳下 崇 Takashi YANAGISHITA |
| ＜要旨＞ There has
been increasing interest in the fabrication of uniform sized polymer
particles from the micrometer to nanometer scales because of their applicability
to the various types of functional devices. In this report the fabrication
of monodisperse polymer particles by membrane emulsification using highly
ordered anodic porous alumina is described. Keywords: Anodic Porous Alumina / Nanoparticle / Membrane Memulsification |
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| 金属ナノ粒子と高分子の複合材料の精密設計 Fine Structural Control of Metal Nanoparticles / Polymer Nanocomposites |
赤松 謙祐 Kensuke AKAMATSU |
| ＜要旨＞ Hybrid nanocomposites
containing metal nanoparticles dispersed in polymer matrices have attracted
much attention recently in various technological fields. Properties of
these new materials are strongly dependent on their microstructure, e.g.,
size, size distribution, and interparticle spacing of the dispersed nanoparticles.
A technique that allows precise control over film microstructure is,
therefore, indispensable for the preparation of nanocomposites with desired
properties. Keywords: Metal Nanoparticle / Nanocomposites / In Situ Synthesis / Particle-to-Particle Interaction |
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| 金属錯体反応場としてのタンパク質結晶設計 Porous Protein Crystals Designed for Metal Complexes |
上野 隆史 Takafumi UENO |
| ＜要旨＞ Protein
crystals have attracted much attention as solid materials. Our present
works demonstrate that protein crystals can be employed as porous bio-materials by site-specific modifications, in the accumulation of metal ions, and for the integration of various metal complexes. Keywords: Protein Engineering / Protein Crystals / Self-Assembly / Biomineralization / Electron Transfer |
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| グローイングポリマー Growing Polymers: A Personal Account |
| 「らせん」と「ザリガニ」をつなぐもの Polymer Chemistry Covers All Aspects of “Helix” and “Crayfish” |
西村 達也 Tatsuya NISHIMURA |
| ＜要旨＞ Postdoctoral researchers should try to switch their focuses between graduate school and postdoctoral period to improve their development capacity. When I joined Kato laboratory as a postdoctoral researcher, I changed the direction of my research field from helical polymers to a crayfish. I realized that the underlying science of both fields is polymer chemistry. |
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| 米国留学経験で得たもの Great Experience in the USA |
林 灯 Akari HAYASHI |
| ＜要旨＞ My research life is really based on great experience in the USA. I have intentionally learned various research subjects during my Ph.D. and postdoctoral work, and then developed an independent project, a “Carbon nanoreactor”. |
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| 高分子科学最近の進歩 Front-Line Polymer Science |
| 量子ビーム利用による現代の高分子結晶構造解析 Structure Analysis of Polymer Crystals Modernized with Quantum Beam Usage |
田代 孝二 Kohji TASHIRO |
| ＜要旨＞ One of the
most significant progresses in the X-ray crystal structure analysis technique
is the utilization of a synchrotron high-energy X-ray source which can
give us a tremendously large number of reflections, making it possible
to find out even the hydrogen atomic positions with high accuracy. The
wide-angle neutron diffraction method is also important for the extraction
of hydrogen atomic positions as demonstrated in the case study of fully-deuterated
polyethylene. The so-called X-N (X-ray-neutron) method has been
also applied, which successfully clarified the bonded electron density
distribution
along a polydiacetylene skeletal chain. Detailed crystal structure analysis
was performed also to observe the mechanical deformation mechanism of
a polymer crystal viewed on the atomic level. Time-dependent rapid X-ray
diffraction measurement has made it possible to trace the structural
change in a photo-induced solid-state polymerization process. An organized
combination of X-ray diffraction methods with others such as infrared
spectroscopy has shown to be important for the study of structural evolution
processes of polymer crystals. Keywords: X-Ray Crystal Structure Analysis / Wide-Angle Neutron Diffraction / Hydrogen Atomic Positions / High-Energy Synchrotron X-Ray Beam / Electron Density Distribution / X-N Method / Photo-Induced Solid-State Polymerization Reaction / Microscopic Deformation Mechanism |
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| Copyright(C) 2010 The Society of Polymer Science, Japan All Rights Reserved. |