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Chemistry Letters
Vol. 34, No. 1 (January, 2005)
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Web Release Date:
November 27, 2004
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A Key Role of Orbital Interaction in the Main Group Element-containing π-Electron Systems
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Shigehiro Yamaguchi and Kohei Tamao
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Various types of main group element-containing π-electron systems have been synthesized using silole, dibenzoborole, or bis-silicon-bridged stilbene as the key building units. In these π-electron systems, the orbital interaction between the main group element moiety and the π-conjugated framework, such as pπ–π* and σ*–π* conjugation, plays a crucial role in determining their characteristic electronic structures and makes them promising materials for applications in organic electronics and optoelectronics.
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Web Release Date:
December 23, 2004
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Mesoscopic Solar Cells for Electricity and Hydrogen Production from Sunlight
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Michael Grätzel
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The quality of human life depends to a large degree on the availability of energy sources. The present annual worldwide energy consumption has already attained a level of over 400 exajoules and is expected to further augment steeply from the increase in world population and the rising demand of energy in the developing countries. This implies enhanced depletion of fossil fuel reserves leading to further aggravation of the environmental pollution. Quality of life on earth is threatened unless renewable energy resources can be developed in the near future. Chemistry is expected to make important contributions to identify environmentally friendly solutions of the energy problem. One attractive strategy discussed in this article is the development of systems that mimic natural photosynthesis in the conversion solar energy. The task to be accomplished by these systems is to harvest sunlight and convert it to electricity or drive an uphill chemical reaction. Learning from the
concepts used by green plants, we have developed a molecular photovoltaic device whose overall efficiency for solar energy conversion to electricity has already attained 11%. The system is based on the sensitization of nanocrystalline oxide films by charge-transfer sensitizers. The underlying fundamental processes of light trapping by the sensitizer, heterogeneous electron transfer from the electronically excited chromophore into the conduction band of the semiconductor oxide and the percolative migration of the injected electrons through the mesoporous film to the collector electrode, will be described below in detail. The low cost and ease of production of the new cell should benefit large scale applications. These systems will undoubtedly promote the acceptance of renewable energy technologies, not least by setting new standards of convenience and economy. The nanocrystalline semiconductor junctions developed first for dye sensitized solar cells have meanwhile found a
realm of other applications ranging from electrochromic and electroluminescent displays to high power lithium insertion batteries. They are also used in tandem cells for the cleavage of water into hydrogen and oxygen by sunlight.
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Web Release Date:
November 27, 2004
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A New Hydrothermal Route to Prism-shaped CuSeO3·2H2O Single Crystals
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Jianhua Cui, Fan Guo, and Xinzheng Liu
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Web Release Date:
November 27, 2004
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An Efficient Dye-sensitized Photoelectrochemical Solar Cell Made from CaCO3-coated TiO2 Nanoporous Film
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Nobuhiro Okada, Subbian Karuppuchamy, and Masaaki Kurihara
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Web Release Date:
November 27, 2004
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Coordination of a Water Molecule to a Square-pyramidal N2S3-type Co(III) Complex Directed to an Active Site of Nitrile Hydratase
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Tomohiro Ozawa, Tomohiro Ikeda, Takuma Yano, Hidekazu Arii, Syuhei Yamaguchi, Yasuhiro Funahashi, Koichiro Jitsukawa, and Hideki Masuda
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Web Release Date:
November 27, 2004
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Single Crystal Ni5Zn21 Nanowire Arrays Fabricated by Electrodeposition in Anodic Alumina Membranes
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Chong Jia, Weifeng Liu, Bei Zhang, Chuangui Jin, Lianzeng Yao, Weili Cai, and Xiaoguang Li
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Web Release Date:
November 27, 2004
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Chlorophyll Chemiluminescence Emitted by Chlorin Ring Cleavage with Acetonitrile and Hydrogen Peroxide
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Toshimasa Nagoshi and Shukuro Igarashi
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Web Release Date:
November 27, 2004
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Preparation of Fast Proton-Conducting Zinc Metaphosphate Hydrogel and Its Potential Application to Electric Double-layer Capacitors
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Yusuke Daiko, Takafumi Akamatsu, Toshihiro Kasuga, and Masayuki Nogami
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Web Release Date:
November 27, 2004
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Additional RNA–Protein Interactions Facilitate in vitro Selection by Ribosome Display
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Atsushi Inoue, Shinya Y. Sawata, Satoshi Fujita, and Kazunari Taira
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Web Release Date:
November 27, 2004
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A One-pot Synthesis of Terminal Alkynes from anti-3-Aryl-2,3-dibromopropanoic Acids under Microwave Irradiation
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Chunxiang Kuang, Hisanori Senboku, and Masao Tokuda
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Web Release Date:
November 27, 2004
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Synthesis and Formation Mechanism of Silver Nanowires by a Templateless and Seedless Method
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Qitao Zhao, Jianrong Qiu, Chongjun Zhao, Lisong Hou, and Congshan Zhu
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Web Release Date:
November 27, 2004
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Monooxygen-containing Analogue of BDH-TTP, DHOT-TTP [2-(1,3-Dithiolan-2-ylidene)-5-(1,3-oxathiolan-2-ylidene)-1,3,4,6-tetrathiapentalene], and Its Metallic AuI2 Salt
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Jun-ichi Yamada, Ken-ichi Kunigita, Hiroki Akutsu, Shin’ichi Nakatsuji, and Koichi Kikuchi
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Web Release Date:
November 27, 2004
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Reductive Adsorption of Gold(III) by Crosslinked Lignophenol
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Durga Parajuli, Katsutoshi Inoue, Masayuki Kuriyama, Masamitsu Funaoka, and Kenjiro Makino
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Web Release Date:
January 5, 2005
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The Intramolecular Electron Transfer between the Type 1 Cu and the Type 2 Cu in a Mutant of Hyphomicrobium Nitrite Reductase
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Shinnichiro Suzuki, Takehiko Maetani, Kazuya Yamaguchi, Kazuo Kobayashi, and Seiichi Tagawa
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Web Release Date:
December 4, 2004
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Change in Conformation of J-aggregate 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (H2TPPS) by Addition of Nonionic Surfactant (Triton X-100)
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Nattakarn Wangfuengkanagul and Masaaki Tabata
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Web Release Date:
January 5, 2005
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Schizophyllan Can Act as a One-dimensional Host to Construct Poly(diacetylene) Nanofibers
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Teruaki Hasegawa, Shuichi Haraguchi, Munenori Numata, Tomohisa Fujisawa, Chun Li, Kenji Kaneko, Kazuo Sakurai, and Seiji Shinkai
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Web Release Date:
December 4, 2004
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Alkali-guided Synthesis of Polyaniline Hollow Microspheres
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Xing Wang, Na Liu, Xue Yan, Wanjin Zhang, and Yen Wei
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Web Release Date:
December 4, 2004
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Monooxomolybdenum(IV) Complex with Extremely Bulky Dithiolate Ligands — Acceleration of O-atom Transfer by Distorted Square Pyramidal Conformation
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Koji Baba, Taka-aki Okamura, Hitoshi Yamamoto, Tetsuo Yamamoto, Mitsuo Ohama, and Norikazu Ueyama
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Web Release Date:
December 4, 2004
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Helical Aggregate of Oleic Acid and Its Dynamics in Water at pH 8
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Masako Ishimaru, Taro Toyota, Katsuto Takakura, Tadashi Sugawara, and Yoko Sugawara
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Web Release Date:
December 4, 2004
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Effect of Sm Addition on Ni–MgO Catalysts for the Synthesis of Carbon Nanotubes via Methane Decomposition
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Ke Li, Gongxuan Lu, Weiping Wang, Jianzhong Li, and Jianfu Liu
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Web Release Date:
December 4, 2004
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A Thermal Reduction–Nitridation Route to Nanocrystalline Chromium Nitride (CrN)
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Jianhua Ma and Yihong Du
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Web Release Date:
December 4, 2004
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| 52
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A Room Temperature Self-sacrificing Template Route to Ag2Te Fibers
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Li Mu, Junxi Wan, Dekun Ma, Rui Zhang, Weichao Yu, and Yitai Qian
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Web Release Date:
December 4, 2004
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Water Splitting into H2 and O2 over Cs2Nb4O11 Photocatalyst
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Yugo Miseki, Hideki Kato, and Akihiko Kudo
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Web Release Date:
December 4, 2004
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Facile Synthesis of Polycyclic Aromatic Hydrocarbons via a Trisaryne Equivalent
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Junnai Ikadai, Hiroto Yoshida, Joji Ohshita, and Atsutaka Kunai
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Web Release Date:
December 11, 2004
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Preparation of Spherical Particles with Quartz Single Crystal
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Minahiro Okabayashi, Kenji Miyazaki, Toshio Kono, Miyoko Tanaka, and Yumio Toda
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Web Release Date:
December 11, 2004
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| 60
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Effective scCO2-ionic Liquid Reaction System Based on Symmetric Aliphatic Ammonium Salts for the Rapid CO2 Fixation with Aziridine to 2-Oxazolidinone
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Hajime Kawanami, Hajime Matsumoto, and Yutaka Ikushima
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Web Release Date:
December 11, 2004
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| 62
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Thiocyanate-selective PVC Membrane Electrode Based on Tricoordinate Schiff Base Copper(II) Complex
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Jian-Yuan Dai, Ya-Qin Chai, Ruo Yuan, Yi-Sen Zhang, Yan Liu, Xia Zhong, and Dian-Ping Tang
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Web Release Date:
December 11, 2004
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| 64
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One Pot Synthesis of Photochromic Maleic Anhydride Derivatives
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Tadatsugu Yamaguchi and Masahiro Irie
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Web Release Date:
December 11, 2004
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| 66
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Enhanced Efficiency and Regioselectivity of Intramolecular (2π + 2π) Photocycloaddition of 1-Cyanonaphthalene Derivative Using Microreactors
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Hajime Maeda, Hirofumi Mukae, and Kazuhiko Mizuno
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Web Release Date:
December 11, 2004
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| 68
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Bis(ethylenedioxy)-1,4,5,8-tetraselenanaphthalene: The First Example of Tetraselenanaphthalene
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Ryoji Watanabe, Yoshihiro Miyake, Yoshiyuki Kuwatani, and Masahiko Iyoda
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Web Release Date:
December 11, 2004
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Temperature Dependence on the Activation Energy of Dechlorination in Thermal Degradation of Polyvinylchloride
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Toshiaki Yoshioka, Nobuo Saitoh, and Akitsugu Okuwaki
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Web Release Date:
December 11, 2004
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| 72
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A New Method for the Lactonization of ω-Hydroxy Carboxylic Acids with Di-2-thienyl Carbonate by the Promotion of DMAP and Iodine
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Yoshiaki Oohashi, Kentarou Fukumoto, and Teruaki Mukaiyama
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Web Release Date:
December 11, 2004
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| 74
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Preparation of Tetrahedral Pt Nanoparticles Having {111} Facet on Their Surface
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Akane Miyazaki, Shuichiro Yoshida, Yoshio Nakano, and Ioan Balint
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Web Release Date:
December 11, 2004
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| 76
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Asymmetric Synthesis of Axially Chiral cis-Arylmethylenebicyclo[3.3.0]octanes Using α-Thio- and α-Selenoorganolithium Compounds
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Libo Wang, Shuichi Nakamura, Norio Shibata, and Takeshi Toru
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Web Release Date:
December 11, 2004
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| 78
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Activation of Urea as a Leaving Group in Substitution Reactions of Formamidine Ureas
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David D. Díaz, Warren G. Lewis, and M. G. Finn
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Web Release Date:
January 5, 2005
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| 80
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Selective Extraction of Silver Ion with Proton-Switchable Calix[4]arene
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Hirotaka Higuchi, Takashi Matsufuji, Tatsuya Oshima, Keisuke Ohto, Katsutoshi Inoue, Tsermaa Tsend-Ayush, and Karsten Gloe
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Web Release Date:
December 11, 2004
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| 82
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A Novel Patterning Method of Low-resistivity Metals
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Chang-Ho Noh, Hae-Jung Son, Jin-Young Kim, Ok-Chae Hwang, Ki-Yong Song, T. V. Byk, V. G. Sokolov, and Jin-Baek Kim
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Web Release Date:
December 11, 2004
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| 84
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Lewis Base-catalyzed anti-Selective Mannich-type Reaction between Trimethylsilyl Enolates and Aldimines
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Eiki Takahashi, Hidehiko Fujisawa, and Teruaki Mukaiyama
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Web Release Date:
December 11, 2004
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| 86
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Simplified Synthesis of Cobalt Ferrite Nanotubes Using Sol–Gel Method
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G. B. Ji, H. L. Su, S. L. Tang, Y. W. Du, and B. L. Xu
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Web Release Date:
December 11, 2004
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| 88
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Lithium Acetate-catalyzed Trifluoromethylation of Carbonyl Compounds with (Trifluoromethyl)trimethylsilane
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Teruaki Mukaiyama, Yoshikazu Kawano, and Hidehiko Fujisawa
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Web Release Date:
December 18, 2004
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| 90
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A Novel Gallium/Samarium-mediated Coupling of Epoxides with Allyl Halides in Aqueous Media and Synthesis of Homoallylic Alcohols
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Mukut Gohain and Dipak Prajapati
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Web Release Date:
December 18, 2004
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| 92
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Surfactant-dependent Photoluminescence of CdTe Nanocrystals in Aqueous Solution
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Chunliang Li and Norio Murase
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Web Release Date:
December 18, 2004
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| 94
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An Approach towards Nano-size Crystals of Poly(acrylic acid): Polymerization Using Layered Double Hydroxides as Template
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Ge Wang, Fuli Cai, Lichun Si, Zhiqiang Wang, and Xue Duan
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Web Release Date:
December 18, 2004
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| 96
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Sonochemical Synthesis of Inorganic–Organic Hybrid Nanocomposite Based on Gold Nanoparticles and Polypyrrole
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Jong-Eun Park, Mahito Atobe, and Toshio Fuchigami
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Web Release Date:
December 18, 2004
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| 98
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A Highly Selective and Sensitive Fluorescent Chemosensor for Fe3+ in Physiological Aqueous Solution
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Jun Hua and Yan-Guang Wang
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Web Release Date:
December 18, 2004
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| 100
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An Improved Approach for Synthesis of Positively Charged Silver Nanoparticles
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Zhenming Sui, Xiao Chen, Luyan Wang, Yongcun Chai, Chunjie Yang, and Jikuan Zhao
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Web Release Date:
December 18, 2004
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| 102
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Copper(II) Triflate Immobilized in [bmim]BF4 Ionic liquid: An Efficient Reaction Medium for Michael Addition of β-Ketoesters to Acceptor-activated Alkenes
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J. S. Yadav, B. V. S. Reddy, Gakul Baishya, and A. Venkat Narsaiah
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Web Release Date:
December 18, 2004
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| 104
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A Helical Supramolecular Polymer Formed by Host–Guest Interactions
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Masahiko Miyauchi and Akira Harada
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Web Release Date:
January 5, 2005
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| 106
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One-pot Synthesis of Substituted Quinolines by Iridium-catalyzed Three-component Coupling Reaction
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Takeyuki Igarashi, Takashi Inada, Tadao Sekioka, Takayuki Nakajima, and Isao Shimizu
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Web Release Date:
January 5, 2005
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| 108
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Highly Efficient Ni–Ce–O Mixed Oxide Catalysts via Gel-coprecipitation of Oxalate Precursors for Catalytic Combustion of Methane
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Nan Yi, Yong Cao, Yong-Mei Liu, Wei-Lin Dai, He-Yong He, and Kang-Nian Fan
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Web Release Date:
December 18, 2004
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| 110
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Lyophilization of Lipase Together with Ionic Compounds Generates Highly Enantioselective and Solvent-sensitive Lipase in Organic Solvents
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Shin-ichi Ueji, Shu-ichi Mori, Hiromi Yumoto, Naomi Hiroshima, and Yasuhito Ebara
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Web Release Date:
December 18, 2004
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| 112
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Fabrication of Silver Nanowires by Selective Electroless Plating of DNA Stretched Using the LB Method
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Yuichi Hashimoto, Yasutaka Matsuo, and Kuniharu Ijiro
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Web Release Date:
December 18, 2004
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| 114
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Highly Dispersed Gold Nanowires within the Pore Channels of Mesoporous Silica Thin Films Prepared From Organic–Inorganic Hybrid Films Functionalized with Basic Moieties
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Jinlou Gu, Jianlin Shi, Zile Hua, Liangming Xiong, Lingxia Zhang, and Lei Li
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Web Release Date:
December 18, 2004
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| 116
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Parallel β-sheet as a Novel Template for Polymerization of Diacetylene
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Takeshi Mori, Kenji Shimoyama, Youichi Fukawa, Keiji Minagawa, and Masami Tanaka
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Web Release Date:
December 22, 2004
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| 118
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A Novel Route to Octahedral In2O3 Particles Exhibiting Near Band Emission
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Wu Zhang, Zhen Huang, Ting Li, Qun Tang, Dekun Ma, and Yitai Qian
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Web Release Date:
December 22, 2004
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| 120
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One-step Synthesis of Single-crystalline CdSe Nanorods via γ-Ray Irradiation
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Qingchun Zhao, Wenming Chen, and Qingren Zhu
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Web Release Date:
December 22, 2004
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Single Crystal Trigonal Selenium Nanoplates Converted from Selenium Nanoparticles
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Haoyong Yin, Zhude Xu, Huahui Bao, Jingyi Bai, and Yifan Zheng
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» graphical abstracts |
