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Volume 39, Issue 10
Displaying 1-36 of 36 articles from this issue
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Highlight Review
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Xiaobin Peng, Feng Wang, Ajoy Kumar Bauri, A. F. M. Mustafizur Rahman, ...2010 Volume 39 Issue 10 Pages 1022-1027
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
JOURNAL OPEN ACCESSSingle-walled carbon nanotubes (SWNTs) have either chiral or achiral form, and synthesized chiral SWNTs include both left- and right-handed structures in equal amounts. Recently, a racemic mixture was found to be resolved through molecular recognition with gable-type chiral diporphyrins, namely, nanotweezers. This novel separation method for SWNTs allowed optical resolution of SWNTs for the first time. The chiral nanotweezers consist of two chiral porphyrins and rigid spacer in between. Therefore, they have potential to discriminate not only the handedness but also the diameters or alignments of the hexagons of SWNTs. We have prepared the following three types of chiral nanotweezers; m-phenylene-, 2,6-pyridylene-, and 3,6-carbazolylene-bridged diporphyrins. In the extraction of SWNTs, different selectivities have been observed among the nanotweezers. This can be attributed to the differences in their structures; namely, the dihedral angles and the distance of the two porphyrins. In this review, we would like to discuss the relationship between the structures of the nanotweezers and the results of the optical and (n,m) enrichments of the extracted SWNTs.View full abstract
Editor's Choice
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Kaori Matoishi, Shiro Nakatsuka, Kazuoki Nakai, Motoaki Isokawa, Naosh ...2010 Volume 39 Issue 10 Pages 1028-1029
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
JOURNAL OPEN ACCESS
Supplementary materialNew well-defined polyethylene/poly(ethylene glycol) AB3-type hybrid materials have been developed, and the materials form nanosized particles in water (water dispersion, average particle size 18 nm) as a result of the self-assembly. This is the first example of nanosized particles comprised of polyolefin/polar polymer hybrid materials, which display unprecedented material properties.View full abstract
Letter
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Ping-Jyun Sung, Mei-Ru Lin, Michael Y. Chiang, I-Chu Huang, Siou-Ming ...2010 Volume 39 Issue 10 Pages 1030-1032
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
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Supplementary materialChemical investigation on a cultured octocoral identified as Briareum sp. has led to the isolation of a new 12-hydroperoxybriarane, briarenolide D (1) and a known briarane, 2β-acetoxy-2-(debutyryloxy)stecholide E (2). The structure of briarane 1 was established by spectroscopic methods and the structure of 2 was further confirmed by X-ray data analysis for the first time. Cytotoxicity of hydroperoxybriarane 1 toward various tumor cell lines is also described.View full abstract -
Keigo Tanaka, Satoshi Inoue, Norio Murai, Syuji Shirotori, Kazutaka Na ...2010 Volume 39 Issue 10 Pages 1033-1035
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
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Supplementary materialWe described a rare example of an effective isoxazole synthesis via a 1,3-dipolar cycloaddition using ZnCl2, which allowed us to synthesize novel (2-aminopyridin-3-yl)isoxazole derivatives effectively. In addition, these compounds demonstrated potent antifungal activity in vitro against both Candida albicans and Aspergillus fumigatus.View full abstract -
Katsuyoshi Tanaka, Tomomitsu Kato, Shuhei Fujinami, Yutaka Ukaji, Kats ...2010 Volume 39 Issue 10 Pages 1036-1038
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
JOURNAL RESTRICTED ACCESSThe asymmetric 1,3-dipolar cycloaddition of azomethine imines to homoallylic alcohols was achieved by utilizing diisopropyl (R,R)-tartrate as a chiral auxiliary to give the corresponding optically active trans-pyrazolidines with excellent regio-, diastereo-, and enantioselectivities. The catalytic use of diisopropyl (R,R)-tartrate was also effective in the presence of MgBr2.View full abstract -
Kazuhiro Omori, Yoshihiro Kikkawa, Masatoshi Kanesato, Kazuhisa Hirata ...2010 Volume 39 Issue 10 Pages 1039-1041
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
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Supplementary materialTwo-dimensional structures of noncyclic isobutenyl compounds containing ester moieties were investigated by scanning tunneling microscopy. Folded alignment of the molecule was transformed into open extended-structure after a simple thermal reaction of tandem Claisen rearrangement. The drastic change in the two-dimensional structures was caused by the intramolecular hydrogen bonds.View full abstract
Editor's Choice
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Tomohiro Yoshinari, Ken Ohmori, Keisuke Suzuki2010 Volume 39 Issue 10 Pages 1042-1044
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
JOURNAL OPEN ACCESS
Supplementary materialDiastereoselective vinylogous aldol reaction is reported by exploiting a silylated dioxinone to give anti-adducts in high selectivity.View full abstract
Letter
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Shin-ya Kuwahara, Kazuya Yamamoto, Jun-ichi Kadokawa2010 Volume 39 Issue 10 Pages 1045-1047
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
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Supplementary materialIn this study, we synthesized an amphiphilic polyhedral oligomeric silsesquioxane (POSS) having controlled numbers of hydrophilic and fluorescent hydrophobic groups (seven and one, respectively) by the successive reactions of a starting compound, octa(3-aminopropyl)-POSS, with gluconolactone and with dansyl chloride under appropriate conditions. The product formed fluorescent nanoparticles with relatively well-defined morphology in water by self-aggregation, which was confirmed by SEM, DLS, and fluorescence measurements.View full abstract -
Takao Saito, Hiromu Goto, Makoto Yagihashi, Atsushi Hozumi2010 Volume 39 Issue 10 Pages 1048-1049
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
JOURNAL RESTRICTED ACCESSA superhydrophobic surface of a perfluoroalkyl isocyanate (RF-NCO) layer on oxidized aluminum (BWAlAl2O3) was photolithographed using masked 172-nm vacuum ultraviolet light to fabricate a superhydrophobic/superhydrophilic micropattern. Cell-adhesion experiments revealed complete cell repellency on the superhydrophobic region of the RF-NCO layer and cell adhesiveness on the superhydrophilic region of BWAlAl2O3 surface.View full abstract -
Motoi Kawatsura, Kosuke Kamesaki, Mitsuaki Yamamoto, Shuichi Hayase, T ...2010 Volume 39 Issue 10 Pages 1050-1051
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
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Supplementary materialRu(cod)(2-methylallyl)2 was found to catalyze the Suzuki–Miyaura cross-coupling reaction of aryl bromides and aryl iodides with arylboronic acids. The reaction was catalyzed by 10 mol % Ru(cod)(2-methylallyl)2 at 60 °C, and afforded the biaryls in moderate to good yields.View full abstract -
Makoto Shimizu, Kanako Okura, Takuya Arai, Iwao Hachiya2010 Volume 39 Issue 10 Pages 1052-1054
Published: October 05, 2010
Released on J-STAGE: August 21, 2010
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Supplementary materialIn the presence of titanium tetraiodide, a tandem Prins reaction of alkynes proceeded with acetals to give (Z,Z)-1,5-diiodo-1,3,5-triarylpenta-1,4-dienes in good yields, where an intriguing reversal of the stereoselectivity was observed among titanium tetrahalides.View full abstract -
Yasutaka Nagaoka, Tribidasari A. Ivandini, Daisuke Yamada, Shinoka Fuj ...2010 Volume 39 Issue 10 Pages 1055-1057
Published: October 05, 2010
Released on J-STAGE: August 28, 2010
JOURNAL RESTRICTED ACCESSElectrochemical selective detection of not only As(III) but also As(V) has been investigated by anodic stripping voltammetry. Here, instead of using modified working electrodes, simple as-deposited boron-doped diamond (BDD) electrodes were used with the addition of gold ions in the sample solution as a catalyst for the electrochemical reaction. A potential-step technique was performed to minimize the hydrogen evolution effect that occurs at the highly negative potential such as −1.5 V (vs. Ag/AgCl) for the reduction of As(V). The present method realized very high sensitivity with an experimental detection limit of 12 ppb and excellent stability for the detection of both As(III) and As(V) as well as mixed solutions of these forms.View full abstract -
Nagayoshi Miyanari, Takateru Yamamuro, Masashi Kunitake, Katsuhiko Nis ...2010 Volume 39 Issue 10 Pages 1058-1059
Published: October 05, 2010
Released on J-STAGE: August 28, 2010
JOURNAL RESTRICTED ACCESSA simple and useful technique for preparing an oxidation-resistant film on a Pb electrode is reported. By dipping a Pb electrode into a mixed solution of 1% ascorbic and 5% boric acids at 40 °C and then drying in air, the film was coated on the surface to protect the Pb electrode from oxidation. EPMA results clearly showed that no oxidation of the Pb surface took place even after one week in air. In addition, the discharge curve of a Pb plate treated with the reported method was as good as that obtained from conventional methods.View full abstract -
Aki Hayashi, Hirokazu Nakayama2010 Volume 39 Issue 10 Pages 1060-1062
Published: October 05, 2010
Released on J-STAGE: August 28, 2010
JOURNAL RESTRICTED ACCESSThe intercalation of sodium valproate, a hygroscopic antiepileptic drug, was successful for the first time in the interlayer region of nitrate-type LDH simply by mixing both powders in a mortar at room temperature. The addition of a small amount of water accelerated the reaction.View full abstract -
Kenji Kakiage, Emi Fujimura, Hiroyuki Mine, Takenori Izumizawa, Takash ...2010 Volume 39 Issue 10 Pages 1063-1065
Published: October 05, 2010
Released on J-STAGE: August 28, 2010
JOURNAL RESTRICTED ACCESSThe effects of the introduction of alkylsilyl groups to porphyrin dyes on their sensitizing property in dye-sensitized solar cells were investigated by using a newly synthesized tetraphenylporphyrincarboxylic acid containing trimethylsilyl groups. The cell with the porphyrin showed higher photovoltaic performance than that with a tert-butyl-containing analog, and the zinc complex of the porphyrin exhibited remarkably high sensitizing performance comparable to N3 dye.View full abstract -
Atsushi Okada, Satoshi Kikuchi, Koji Nakano, Kiyoshi Nishioka, Kyoko N ...2010 Volume 39 Issue 10 Pages 1066-1068
Published: October 05, 2010
Released on J-STAGE: August 28, 2010
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Supplementary materialDi(ketoiminato)cobalt complexes have been employed for the alternating copolymerization of alkylene oxide and carbon dioxide. These complexes exhibited not only good catalytic activity for polycarbonate synthesis, but also an excellent selectivity for the formation of carbonate linkages without any ether linkage in the reaction of several alkylene oxides, especially for ethylene oxide.View full abstract -
Yoshiro Oda, Koji Hirano, Kazuki Yoshii, Susumu Kuwabata, Tsukasa Tori ...2010 Volume 39 Issue 10 Pages 1069-1071
Published: October 05, 2010
Released on J-STAGE: August 28, 2010
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Supplementary materialPalladium nanoparticles in an ionic liquid prepared readily by sputter deposition efficiently catalyze the Suzuki–Miyaura coupling of hydrophobic as well as hydrophilic aryl halides in water.View full abstract -
Toshimasa Suzuki, Shushi Suzuki, Yousuke Tomita, Ken-ichi Okazaki, Tam ...2010 Volume 39 Issue 10 Pages 1072-1074
Published: October 05, 2010
Released on J-STAGE: September 04, 2010
JOURNAL RESTRICTED ACCESSSputter deposition of transition metals W, Mo, Nb, and Ti into ionic liquids (ILs) produced corresponding metal oxide nanoparticles (NPs) smaller than 6 nm. The NPs were obtained in a highly dispersed manner without any additional stabilizing agent in ILs.View full abstract -
Masayuki Tsuchiya, Yasumasa Kanekiyo2010 Volume 39 Issue 10 Pages 1075-1077
Published: October 05, 2010
Released on J-STAGE: September 04, 2010
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Supplementary materialA new stimuli-responsive supramolecular system has been established based on the inclusion complex of boronic acid-modified amylose with iodine. When iodine was mixed with the boronic acid-modified amylose in water, it encapsulated iodine within the helical cavity of amylose. The encapsulated iodine was dissociated from the amylose cavity by the addition of polyhydroxy compounds, and the process could be conveniently monitored by distinct color changes.View full abstract -
Kiran Pradhan, Kaliaperumal Selvaraj, Ashis K. Nanda2010 Volume 39 Issue 10 Pages 1078-1079
Published: October 05, 2010
Released on J-STAGE: September 04, 2010
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Supplementary materialVarious metal complexes derived from different Schiff bases are conveniently prepared using solvent-free condensation reactions in one-pot synthesis, resulting in significantly enhanced yields. Initial calorimetric studies, and/or TGA of reaction mixtures, led to better optimization of reaction conditions. The ligands like imines, hydrazones, semicarbazones, and nitrones are also synthesized by this method; thus this process is general and expedient.View full abstract -
Takeshi Kimijima, Takafumi Sasaki, Masafumi Nakaya, Kiyoshi Kanie, Ats ...2010 Volume 39 Issue 10 Pages 1080-1081
Published: October 05, 2010
Released on J-STAGE: September 04, 2010
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Supplementary materialPhotocatalytic activity of anatase-type TiO2 nanoparticles with different shape, prepared by gel–sol method, was evaluated. Particle morphology, that is, the main surface crystal plane was found critically decisive for the photocatalytic activity for H2 evolution from aqueous ethanol. Namely, the activity of cubic particles bound by {100} and {001} faces, estimated from high-resolution TEM images, showed highest activity among one tested.View full abstract -
Yoshiteru Kawakami, Yoshio Kabe2010 Volume 39 Issue 10 Pages 1082-1083
Published: October 05, 2010
Released on J-STAGE: September 04, 2010
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Supplementary materialThe Friedel–Crafts acylation of octaphenylsilsesquioxane (T8Ph8) (1) with Cl2CHOCH3 or CH3COCl at low temperature followed by subsequent hydrolysis provided the octakis(m-acylphenyl)octasilsesquioxanes (T8(C6H4R-m)8); R = CHO (2a) and R = COCH3 (2b) in high yields. The remarkable meta-selectivity of 2a and 2b in more than 99:1 and 93:7 meta/para ratios was confirmed by 1H NMR and X-ray analyses, and further elucidated via theoretical calculations.View full abstract -
Takuya Tamaki, Nozomi Miyoshi, Takeaki Uehara, Yuichi Ohya2010 Volume 39 Issue 10 Pages 1084-1085
Published: October 05, 2010
Released on J-STAGE: September 04, 2010
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Supplementary materialA simple and conventional method to isolate gold nanoparticle (GNP)/oligo-DNA conjugates having defined number of oligo-DNAs by gel electrophoresis was developed using extension oligo-DNAs. Formation of self-organized assemblies of GNPs in two different sizes using the conjugates having one or two complementary oligo-DNAs was demonstrated. This method to prepare GNP/oligo-DNA conjugates with controlled number of DNA strands should be useful to build up functional nanoarrays of GNPs on DNA scaffolds.View full abstract
Editor's Choice
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Takamichi Oishi, Kazuaki Yoshimura, Kazuya Yamaguchi, Noritaka Mizuno2010 Volume 39 Issue 10 Pages 1086-1087
Published: October 05, 2010
Released on J-STAGE: September 04, 2010
JOURNAL OPEN ACCESS
Supplementary materialA simple dinuclear copper complex [Cu(μ-OH)(tmen)]2Cl2 (tmen = N,N,N′,N′-tetramethylethylenediamine) could act as an effective precatalyst for the 1,3-dipolar cycloaddition of pyrazolidinone-based dipoles to terminal alkynes to produce the corresponding N,N-bicyclic pyrazolidinone derivatives.View full abstract
Letter
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Ryushin Mizuta2010 Volume 39 Issue 10 Pages 1088-1089
Published: October 05, 2010
Released on J-STAGE: September 04, 2010
JOURNAL OPEN ACCESSThe direct visualization of transcribed RNA-dependent DNA structural change by atomic force microscopy revealed that guanine-rich RNA acts as a molecular switch for changing DNA conformation and the changed DNA structure is stably maintained, suggesting the possibility that DNA can memorize past transcription action in terms of shape.View full abstract -
Tsutomu Furuta, Munetoshi Sakai, Toshihiro Isobe, Akira Nakajima2010 Volume 39 Issue 10 Pages 1090-1092
Published: October 05, 2010
Released on J-STAGE: September 04, 2010
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Supplementary materialA highly hydrophobic surface with nanoscale roughness was prepared by coating with a short-chained fluoroalkylsilane. The freezing behavior of a water droplet on the surface was then investigated. Freezing initiated in the vicinity of the three-phase contact line, producing a sharpened onion-like top on the droplet. The result of the freezing ratio at each time and the volume ratio at each height demonstrates the possibility that freezing advanced linearly in a vertical direction.View full abstract -
Minoru Ashizawa, Ken-ichi Ishidzu, Masaki Watanabe, Tetsuhiko Tanahash ...2010 Volume 39 Issue 10 Pages 1093-1095
Published: October 05, 2010
Released on J-STAGE: September 11, 2010
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Supplementary materialA new donor (ST-STP), in which tetrathiafulvalene and tetraselenafulvalene are fused, has been synthesized. This donor shows unexpectedly large on-site Coulomb repulsion compared with other bis-fused TTF systems. In (ST-STP)ReO4, intramolecular charge disproportionation is suggested by the crystal structure and transport properties.View full abstract -
Ken-ichi Suzuki, Takeshi Kodama, Koichi Kikuchi, Wataru Fujita2010 Volume 39 Issue 10 Pages 1096-1098
Published: October 05, 2010
Released on J-STAGE: September 11, 2010
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Supplementary materialA new molecule-based magnet, α-(benzo[1,2-d:4,5-d′]bis[1,3,2]dithiazole (BBDTA))2ReBr6, comprised a one-dimensional network composed of an alternative alignment of BBDTA+ (S = 1/2) and ReBr62− (S = 3/2) and an S = 1/2 regular chain network of the other BBDTA+. This material became a ferromagnet below 12.2 K. The magnetization curve showed complex field dependence, which might be related to the orientation of the one-dimensional alternative network in its crystal.View full abstract -
Nantanit Wanichacheva, Anyanee Kamkaew, Supranee Watpathomsub, Vannaja ...2010 Volume 39 Issue 10 Pages 1099-1101
Published: October 05, 2010
Released on J-STAGE: September 11, 2010
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Supplementary materialA novel fluorometric sensor possessing two dansyl moieties based on 2-[3-(2-aminoethylsulfanyl)propylsulfanyl]ethanamine 1 was prepared by a ready synthetic approach using a conventional two-step synthesis. 1 exhibits highly sensitive and selective on–off Hg2+ fluorescence quenching behavior in aqueous acetonitrile solutions and is shown to discriminate various competing metal ions such as Cu2+, Ag+, Ca2+, Mn2+, Zn2+, Ba2+, Cd2+, Co2+, Na+, and K+ exhibiting a detection limit of 7 nM or 1.4 ppb with a working range of 1.8–15 ppb.View full abstract -
Hideo Takeda, Hiroki Tanaka, Kazuo Nomura2010 Volume 39 Issue 10 Pages 1102-1103
Published: October 05, 2010
Released on J-STAGE: September 11, 2010
JOURNAL RESTRICTED ACCESSAcid phosphatase from sweet potato was immobilized on the external-solution side surface of a perfluorocarboxylate ion-exchange membrane. Two membranes of different enzyme amounts were prepared without any crosslinking reagents. The effect of the immobilized-enzyme amount on the enzymatic reaction rate across the membrane was investigated for the hydrolysis of 4-nitrophenyl phosphate. The flux of the reaction product, 4-nitrophenol, was found to obey a Michaelis–Menten equation. As the amount of the immobilized enzyme increased, the Michaelis constant decreased whereas the maximum flux did not increase.View full abstract -
Shoko Furuhashi, Hirosuke Tatsumi, Takashi Kimoto, Teruo Hinoue2010 Volume 39 Issue 10 Pages 1104-1105
Published: October 05, 2010
Released on J-STAGE: September 11, 2010
JOURNAL RESTRICTED ACCESSWe found that currents flowed across an interface, when a nitrobenzene solution containing fullerene, C60, and tetraoctylammonium tetraphenylborate was illuminated. Expecting that a photochemical reaction of C60 would be responsible for the currents, we investigated its mechanism. Voltammetric and spectroscopic experiments suggested that the currents were generated through ion transfer of anions produced during the photochemical reaction and/or electron transfer between anion radical of C60 and oxygen. Further, we propose a galvanic cell based on the photochemical reaction.View full abstract -
Takashi Hamada, Toshio Takayama, Kazuaki Kudo2010 Volume 39 Issue 10 Pages 1106-1107
Published: October 05, 2010
Released on J-STAGE: September 11, 2010
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Supplementary materialAlicyclic poly(amide acid) triethylammonium salts having alkyl ester side chains spontaneously self-assembled to form nanoaggregates in water. The nanoaggregates of poly(amide acid)s encapsulated a hydrophobic guest molecule, Nile red, within their apolar microenvironment. The size of the aggregates and the critical aggregation concentration (CAC) were considerably affected by both side chain length and Mw, of the polymers.View full abstract -
Yasuhiro Yamasaki, Tomohiro Mori2010 Volume 39 Issue 10 Pages 1108-1109
Published: October 05, 2010
Released on J-STAGE: September 11, 2010
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Supplementary materialA novel synthetic methodology and the characterization of subphthalocyanines (SubPcs) having an axial substituent with a direct boron–carbon bond are reported. The SubPcs are found to be more light- and/or heat resistant than analogs with a heteroatom between boron and carbon, thereby making SubPcs suitable for application to functional dyestuff in display devices.View full abstract -
Takahiro Yano, Weng On Yah, Hiroki Yamaguchi, Yuki Terayama, Masamichi ...2010 Volume 39 Issue 10 Pages 1110-1111
Published: October 05, 2010
Released on J-STAGE: September 11, 2010
JOURNAL OPEN ACCESS
Supplementary materialWe developed a surface modification of electrospun nonwoven nanofiber mat by surface-initiated atom transfer radical polymerization (ATRP). Nanofibers of poly(methyl methacrylate)-co-poly[2-(2-bromoisobutyryloxy)ethyl methacrylate] were prepared by electrospinning to form a nonwoven nanofiber mat containing bromoalkyl groups, which initiated ATRP of 3-[dimethyl(methacryloyloxyethyl)ammonio]propanesulfonate (DMAPS) and 2-(perfluorooctyl)ethyl acrylate (FA-C8), respectively, without deformation of nanofiber structure. The surface of the obtained electrospun nonwoven nanofiber mat was characterized by XPS, SEM, AFM, and contact angle measurement before and after surface modification.View full abstract -
Wenjun Xiao, Xiaoxing Wang, Qin Chen, Tinghua Wu, Ying Wu, Lizong Dai, ...2010 Volume 39 Issue 10 Pages 1112-1113
Published: October 05, 2010
Released on J-STAGE: October 05, 2010
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Supplementary materialA novel and green method for the synthesis of dialkylimidazolium ionic liquids (ILs) has been developed. It was through a one-step alkylation of dialkyl carbonate with the corresponding acidic ionic liquid precursors (AILPs) prepared from the neutralization of imidazole derivatives with acids.View full abstract -
Di Liu, Yang Tian, Anwei Zhu, Yongping Luo2010 Volume 39 Issue 10 Pages 1114-1116
Published: October 05, 2010
Released on J-STAGE: September 11, 2010
JOURNAL RESTRICTED ACCESSIn this letter, a low-cost, procedurally simple, and environmentally friendly strategy has been developed for in situ electrodeposition of FePt nanoparticles on L-cysteine-modified gold electrode surfaces. The as-prepared 20 nm FePt nanoparticles show high activity toward ORR, which is comparable with that of commercial Pt catalyst. In addition, the electrodeposited FePt nanoparticles exhibit relatively long-term stability, possibly because the alloyed Fe may prevent the dissolution of small Pt nanoparticles in the ORR.View full abstract
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