著者

Masaaki Yoshifuji Anthony J. Arduengo III Tatyana A. Konovalova Lowell D. Kispert Manabu Kikuchi Shigekazu Ito

出版者

The Chemical Society of Japan

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.35, no.10, pp.1136-1137, 2006 (Released:2006-09-09)

参考文献数

26

被引用文献数

40

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A sterically protected biradical species, 1-tert-butyl-3-methyl-2,4-bis(2,4,6-tri-tert-butylphenyl)-1,3-diphosphacyclobutane-2,4-diyl was allowed to react with tris(4-bromophenyl)ammoniumyl hexachloroantimonate as an oxidant and the product was analyzed by EPR to show that the biradical was oxidized to give the corresponding radical cation species. The structure of the cation radical was also supported by ab initio calculations on a model compound.

著者

SEKI Shu ACHARYA Anjali KOIZUMI Yoshiko SAEKI Akinori TAGAWA Seiichi MOCHIDA Kunio

出版者

公益社団法人 日本化学会

雑誌

Chemistry letters (ISSN:03667022)

巻号頁・発行日

vol.34, no.12, pp.1690-1691, 2005-12-05

参考文献数

14

被引用文献数

17

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The photoconductive properties of a series of oligogermanes with dendrite or linear skeleton have been studied by flash photolysis time-resolved conductivity (FP-TRMC) technique. The values of mobility (&Sigma;&mu;) and photocarrier generation yield (&phi;) have been discussed as a function of C<SUB>60</SUB> concentration. The &phi;&Sigma;&mu; values in the order of 10<SUP>&minus;4</SUP> to 10<SUP>&minus;3</SUP> cm<SUP>2</SUP>/Vs were observed for the oligogermanes upon exposure to 532, 355, and 193 nm light. The intrinsic value of mobility in the derivatives was also estimated without contribution from the additives, suggesting the presence of a highly conducting path along the Ge backbones of not only linear oligogermanes but also hyper-branched germanium dendrites.

著者

Fujii Ryosuke Kondo Mizuho Kawatsuki Nobuhiro

出版者

公益社団法人 日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.45, no.6, pp.673-675, 2016

被引用文献数

5

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Doping photosensitive <i>N</i>-benzylideneaniline (NBA) derivatives in a photoinactive polymethacrylate with benzoic acid (BA) side groups (P6BAM) produces a photoinduced orientation in a P6BAM film and its patterning upon exposure to linearly polarized (LP) 365-nm light and subsequent annealing. Two types of NBA derivatives are used: NBA1 containing a carboxylic acid substituent effectively generates a significant photoinduced reorientation. The H-bonds among the carboxylic acids of BA and NBA1 play an important role in the photoinduced orientation.

著者

D'AURIA Maurizio PIANCATELLI Giovanni

出版者

公益社団法人 日本化学会

雑誌

Chemistry letters (ISSN:03667022)

巻号頁・発行日

vol.1993, no.7, pp.1153-1156, 1993-07-05

参考文献数

14

被引用文献数

3

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The treatment of 4,5-dialkyl-4-hydroxy-6-cyclopent-2-en-1-ones with H<SUB>2</SUB>C<SUB>2</SUB> and KOH gave in high yields 2,3-epoxy-2,3-dialkyl-4-hydroxycyclopentanones. Furthermore, only one stereoisomer, characterized by <I>trans</I> relationship between the hydroxy group and the epoxide was obtained. This behaviour can be explained considering that epoxidation occurs during a base catalyzed transposition of the starting cyclopentenone.

著者

Harbuzaru Bogdan Roux Mélanie Paillaud Jean-Louis Porcher Florence Marichal Claire Chézeau Jean-Michel Patarin Joël

出版者

公益社団法人 日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.31, no.6, pp.616-617, 2002

被引用文献数

8

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X-ray powder diffraction pattern analysis and multinuclear solid state NMR studies performed on the as-synthesised Mu-26 solid, a fluorinated all-silica zeolite with the STF framework topology, have revealed unambiguously a triclinic unit cell and space group P1 for this material.

著者

LU Zonghuan SHUTAVA Tatsiana SAHINER Nurettin JOHN Vijay LVOV Yuri

出版者

公益社団法人 日本化学会

雑誌

Chemistry letters (ISSN:03667022)

巻号頁・発行日

vol.34, no.11, pp.1536-1537, 2005-11-05

参考文献数

13

被引用文献数

8

---

Multilayered polyelectrolyte poly(sodium 4-styrenesulfonate)/poly(allylamine hydrochloride) microcapsules prepared using layer-by-layer (LbL) assembly technology were filled by UV-photopolymerization of acrylamide derivatives directly into the capsule interior. Influences of component properties and polymerization conditions on the structure of the obtained composites are discussed. Mixing formed polymer chains with the capsule wall material stabilizes the initial wall conformation and lowers capsule sensitivity to environmental conditions.

著者

Su Yiguo Li Guangshe Chen Xiaobo Liu Junjie Li Liping

出版者

The Chemical Society of Japan

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.37, no.7, pp.762-763, 2008

被引用文献数

16

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A novel white-light phosphor GdVO<SUB>4</SUB>:Ho<SUP>3+</SUP> was prepared via a simple hydrothermal reaction route. Under ultraviolet excitation, the as-prepared nanocrystals showed a broad band emission and sharp lines, which are associated with the oxygen vacancies around V<SUP>4+</SUP> ions and the typical f–f transitions of Ho<SUP>3+</SUP> ions, respectively. The coexistence of broad emission and sharp lines results in the bright white light with a quantum yield of 28%.

著者

Pan Binbin Ma Juanjuan Zhang Xiaobo Li Jinpeng Liu Lin Zhang Dongen Tong Zhiwei

出版者

The Chemical Society of Japan

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

2015

被引用文献数

2

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The sandwich-structured nanocomposite of α-ZrP/CoTMPyP [5, 10, 15, 20-tetrakis (N-methylpyridinium-4-yl) porphyrinato cobalt (III)] was fabricated via electrostatic interaction between cobalt porphyrin and α-ZrP nanosheets. The obtained material was used as a modifier on the glassy carbon electrode (GCE) to test the electrocatalytic performance toward oxygen reduction, the results indicated that dioxygen was reduced to H₂O₂ via two-electron transfer.

著者

Liu Xiaobo Lin Yuhan Chen Yanming An Lijia Ji Xiangling Jiang Bingzheng

出版者

The Chemical Society of Japan

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.34, no.9, pp.1284-1285, 2005

被引用文献数

6

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High-quality CdSe quantum dots have been synthesized through an organometallic method with cadmium methoxide as a cadmium precursor. Without any size sorting, the FWHM (full width at half-maximum) in PL spectra almost for all CdSe samples is less than 30 nm and only 22 nm from the best sample. The emission peaks with different particle size in toluene can be tuned from 478 to 654 nm corresponding to a color change from blue-green to red.

著者

Jiao Jiao Kei Murakami Kenichiro Itami

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.160133, (Released:2016-02-25)

被引用文献数

14

---

Methods that can directly arylate pyridines have significant potential in synthetic chemistry. Herein, we present a palladium-catalyzed C–H arylation of pyridines with aryl triflates that occurs regioselectively at the C3 positions of pyridine core. A variety of aryl triflates and pyridines were applicable to the reaction to provide C3-arylated pyridines regardless of sterics or electronics of the pyridine cores.

著者

Yi-Chou Tsai Chih-Chieh Chang

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.39, no.4, pp.311-311, 2010-04-05 (Released:2010-04-05)

著者

Haruna Sawaguchi Hiroshi Nishida Takahiro Kawai Hiroyuki Mayama Yoshimune Nonomura

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.150005, (Released:2015-02-14)

被引用文献数

1

---

We prepared an apatite/polymer composite material with a fractal surface by transferring the hierarchical rough surface of a plaster replica onto calcium phosphate paste and immersing the paste in buffer. The rough structure (fractal dimension = 2.3) accelerated the spreading and penetration of a water droplet placed on the surface. This material can be applied in dental implants and texture testers.

著者

Yoshimune Nonomura Azusa Yamaguchi

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.151033, (Released:2015-12-16)

被引用文献数

1

---

The friction behavior of water and thickener aqueous solutions was evaluated between a contact probe with a striped rough surface and a substrate. When the probe surface is flat, the contact state is boundary lubrication and fluid film lubrication states for water and thickener aqueous solutions, respectively. In contrast, in the case of the contact probe with a striped rough surface, friction occurred under fluid lubrication state for both water and thickener solutions. These results indicate that the liquid in the depression on the striped rough surfaces change the regime of friction.

著者

Hajime Maeda Hirofumi Mukae Kazuhiko Mizuno

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.34, no.1, pp.66-67, 2005 (Released:2004-12-11)

参考文献数

26

被引用文献数

76 64

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The intramolecular photocycloaddition of a 1-cyanonaphthalene derivative in microreactors made of poly(dimethylsiloxane) (PDMS) was examined. By using the microreactors and flow system, both the efficiency and regioselectivity increased compared with those under batch conditions.

著者

Suguru Yoshida Takamitsu Hosoya

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.150839, (Released:2015-09-12)

被引用文献数

173

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Recent developments in aryne chemistry are reviewed with a particular focus on synthetic methods. This includes an overview of the precursors of arynes and their activators; the generation of arynes with functional groups and their ensuing reactivities; and the novel transformations achieved via aryne intermediates. These newly developed methods have enabled the synthesis of a variety of previously inaccessible aromatic compounds, allowing the construction of a diversity-enriched chemical library that will further facilitate future drug discoveries.

著者

KAWASAKI Tsuneomi UCHIDA Mizuki KAIMORI Yoshiyasu SASAGAWA Taisuke MATSUMOTO Arimasa SOAI Kenso

出版者

The Chemical Society of Japan

雑誌

Chemistry letters (ISSN:03667022)

巻号頁・発行日

vol.42, no.7, pp.711-713, 2013-07-05

被引用文献数

22

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5-Pyrimidyl alkanol with an enantiomeric excess of up to >99.5% was formed using chiral crystals of achiral tris(2-hydroxyethyl) 1,3,5-benzenetricarboxylate as a chiral initiator. In the enantioselective addition of diisopropylzinc to pyrimidine-5-carbaldehyde, the helicity of the molecular arrangement of achiral tricarboxylate in the crystalline state could be successfully used as a source of chirality to afford enantioenriched alkanol in conjunction with asymmetric autocatalysis with amplification of enantiomeric excess.

著者

Ryo Irie Tatsuya Uchida Kazuhiro Matsumoto

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.150747, (Released:2015-08-21)

被引用文献数

25

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The late Emeritus Professor Tsutomu Katsuki, who was leading the field of catalytic asymmetric oxidation worldwide, suddenly passed away on October 30, 2014. Here we wish to commemorate him by highlighting his representative research works particularly on his unique catalytic systems for asymmetric alkene epoxidation, sulfoxidation, alcohol oxidation, oxidative coupling reactions with a personal view and memory.

著者

Viet-Ha Tran Takeshi Yatabe Takahiro Matsumoto Hidetaka Nakai Kazuharu Suzuki Takao Enomoto Seiji Ogo

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.44, no.6, pp.794-796, 2015-06-05 (Released:2015-06-05)

参考文献数

37

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We report the first example of a Ni0 precursor that provides a contamination-free (<1%) nickel film by metal–organic chemical vapor deposition (MOCVD) using N2 as the carrier gas. The structure and physical properties of the Ni0 precursor and subsequent film are described.

著者

Takuro Niidme Masanori Fujii Naotoshi Nakashima Yoshiki Katayama Yasuro Niidome

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.150258, (Released:2015-04-17)

被引用文献数

11

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Gold nanorods were intravenously injected into tumor-bearing mice. The distribution of gold in tumor tissue sections was mapped by imaging mass spectrometry (IMS) using a MALDI mass spectrometer. IMS images of tumor tissue sections indicated that the gold nanorods were not distributed throughout tumor tissues but were localized in vasculature-rich areas.

著者

Shota Hisamitsu Nobuhiro Yanai Shigenori Fujikawa Nobuo Kimizuka

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.150261, (Released:2015-04-09)

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An ionic liquid (IL) composed of 9–anthracene carboxylate anion and ammonium cation possessing three diethylene glycol chains shows photo–triggered dimerization of anthracence chromophores. It causes segregation and crystallization of protonated 9–anthracene carboxylic acid dimer, which is associated with the concurrent liberation of the free amine in the IL. This work provides a new molecular design for photoresponsive ILs, whose first application for site–selective photo–patterning is demonstrated.