研究成果がNature Nanotechnology誌に掲載

当研究室で佐藤宗英 研究員、中島聡夫 君らが中心となって行った酸化チタンナノドットに関する研究成果が、Nature Nanotechnology誌に掲載されました。

Quantum size effect in TiO2 nanoparticles prepared by finely controlled metal assembly on dendrimer templates

N. Satoh, T. Nakashima, K. Kamikura, K. Yamamoto
Nature Nanotechnol. 2008, 3, 106-111.

The use of dendrimer templates to make metal-based nanoparticles of controlled size has attracted much interest. These highly branched macromolecules have well-defined structures that enable them to bind metal ions to generate precursors that can be converted into nanoparticles. We describe the sub-nanometre size control of both anatase and rutile forms of TiO2 particles with phenylazomethine dendrimers, leading to samples with very narrow size distributions. Such fine tuning is possible because both the number and location of metal ions can be precisely controlled in these templates. Quantum size effects are observed in the particles, and the energy gap between the conduction and valence bands exhibits a blueshift with decreasing particle size and is dependent on the crystal form of the material. The dependency of the bandgap energy on these factors is explained using a semi-empirical effective mass approximation.

山元教授が日本化学会学術賞を受賞

日本化学会より顕著な業績を挙げた研究者に対して贈られる第25回学術賞を本年度、山元教授が受賞しました。

(受賞祝賀会兼研究室10周年記念同窓会にて)

PPC10にてYoung Scientist Poster Awardを受賞

当研究室の越智庸介君(M2)が神戸で行われた国際学会PPC-10 (10th Pacific Polymer Conference)にてYoung Scientist Poster Awardを受賞しました。

早慶ワークショップにて優秀賞を受賞

当研究室の中島聡夫君(M2)が早稲田大学にて行われた早慶ワークショップにて優秀賞を受賞しました。

Additive-Free Synthesis of Poly(phenylene oxide): Aerobic Oxidative Polymerization in a Base-Condensed Dendrimer Capsule

K. Yamamoto, Y. Kawana, M. Tsuji, M. Hayashi, T. Imaoka
J. Am. Chem. Soc. 2007, 129, 9248-9532.

Additive-Free Synthesis of Poly(phenylene oxide):  Aerobic Oxidative Polymerization in a Base-Condensed Dendrimer Capsule

The additive-free synthesis of poly(phenylene oxides) by aerobic oxidation was achieved using a copper complex in a dendritic phenylazomethine structure. The outer shell composed of Schiff base units assists the catalytic function of the inner Cu complex moiety. It is important that the hybrid structure should be designed with a rigid architecture not to deactivate the catalytic center. Due to the rigid π-conjugating structure of the phenylazomethine dendrimer, the metal center can retain its fine conformation. This catalyst drastically decreased the total waste required to produce the PPO derivatives and provided a new approach to green polymerization.

日本化学会第87春季年会にて講演奨励賞を受賞

当研究室の越智庸介君(M1)が、日本化学会第87春季年会(2007年3月開催)にて優秀講演賞を受賞しました。