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Volume 37, Issue 5
Displaying 1-37 of 37 articles from this issue
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Highlight Review
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Takahiro Seki, Shusaku Nagano2008 Volume 37 Issue 5 Pages 484-489
Published: May 05, 2008
Released on J-STAGE: March 29, 2008
JOURNAL RESTRICTED ACCESSLight provides practical and versatile tools for structure formation and its tuning of soft materials. This article briefly overviews recent developments of photoalignment and phototuning of nanostructured materials focusing onto the 2D material systems. Two topics are involved; i) phototuning and alignment of microphase-separated nanostructures in block copolymers containing a photoisomerizable unit and ii) photoalignment of organic/silica nanohybrids prepared on a polymer film with photocrosslinkable unit.View full abstract
Letter
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Shinya Nomoto, Mitsuru Satou, Takahiro Yoshida, Hajime Mita, Gen Kumag ...2008 Volume 37 Issue 5 Pages 490-491
Published: May 05, 2008
Released on J-STAGE: March 29, 2008
JOURNAL RESTRICTED ACCESSEtioporphyrin, one of the most common sedimentary porphyrins, was heated at 300 to 450 °C to investigate the diagenetic formation of benzoporphyrins. Chromic acid oxidation of the resulting products afforded maleimides, as well as phthalimides, indicating the formation of benzopyrrole units in the substrate. Isomer ratios of dimethylphthalimides formed during heating were in accordance with those obtained by chromic acid oxidation of the Cretaceous/Tertiary sediments at Rumoi, Hokkaido, which suggests that alkylporphyrins could be transformed into benzoporphyrins in sediments.View full abstract -
Kun Jiang, Fangting Chi, Bo Li, Bo Jiang2008 Volume 37 Issue 5 Pages 492-493
Published: May 05, 2008
Released on J-STAGE: March 29, 2008
JOURNAL RESTRICTED ACCESSHollow polyphenylsilsesquioxane microspheres were fabricated under mild conditions from a mixture of water and phenyltriethoxysilane (PTES) with ammonia as catalyst. The pH value and the temperature of the reaction mixture are the crucial factors contributing to the formation of stable and regular polyphenylsilsesquioxane hollow spheres. A possible mechanism for the formation of hollow structure was proposed.View full abstract -
Akira Iida, Ryo Nakamura, Kenichi Komura, Yoshihiro Sugi2008 Volume 37 Issue 5 Pages 494-495
Published: May 05, 2008
Released on J-STAGE: March 29, 2008
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Supplementary materialDimethyl ether to olefin (DTO) reaction was examined over CeO2-modified Ca-MFI as a catalyst. The CeO2-modified Ca-MFI (Ce/Ca-MFI) showed excellent catalytic performance to give propene as a main product. Activity was 28 times higher than conventional MFI type zeolite and seven times higher than Ca-MFI.View full abstract -
Nishi Bhati, Kuladip Sarma, Amrit Goswami2008 Volume 37 Issue 5 Pages 496-497
Published: May 05, 2008
Released on J-STAGE: March 29, 2008
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Supplementary materialAmberlite IR-120 acidic resin, an age old polymer matrix, plays a significant role as catalyst in the oxidation of aromatic alcohols with urea–hydrogen peroxide in ionic liquid at 70 °C to disproportionate into phenols and carbonyl compounds in 30–60 min following two pathways. Under similar condition tertiary aromatic alcohol gave exclusively monohydroxyphenol accompanied by acetone. However, aliphatic and alicyclic alcohols yielded carbonyl compounds in moderate to good yields in 1–5 h.View full abstract -
Wenjie Xie, Yachong Wang, Xin Xu, Chusheng Chen2008 Volume 37 Issue 5 Pages 498-499
Published: May 05, 2008
Released on J-STAGE: March 29, 2008
JOURNAL RESTRICTED ACCESSWe discovered the stabilization effect of only 1 wt % Ba on synthesizing Eu2+-doped pure Sr–S-phase(Sr2AlxSi12−xN16−xOx+2) under a moderate condition and studied their luminescent properties. The excitation band is at UV–vis spectral region which is about 300–370 nm, and the emission band at 508–538 nm. The emission wavelength changes from 508 to 538 nm as a function of Eu2+ concentration, and the maximum emission intensity could be obtained with the Eu2+ concentration of 0.2. This phosphor can be the potential candidate for using as the green phosphor for UVLED-based white light.View full abstract -
Yoshifumi Tanimoto, Hiromi Yamamoto, Yoshihisa Fujiwara, Masao Fujiwar ...2008 Volume 37 Issue 5 Pages 500-501
Published: May 05, 2008
Released on J-STAGE: March 29, 2008
JOURNAL RESTRICTED ACCESSLiquid thin films having 13–25-mm diameter of water, ethanol, benzene, etc., which cannot be prepared under the earth’s surface gravity, were prepared on a metallic ring using magnetically simulated microgravity. In a magnetic field, poly(vinyl alcohol) and poly(acrylic acid) solid thin films of 20-mm diameter were prepared, for the first time, from liquid films of the respective aqueous solutions.View full abstract -
Junko Takaki, Hiromichi Egami, Kazuhiro Matsumoto, Bunnai Saito, Tsuto ...2008 Volume 37 Issue 5 Pages 502-503
Published: May 05, 2008
Released on J-STAGE: March 29, 2008
JOURNAL RESTRICTED ACCESSThe vanadium(V)(salalen) complex prepared in situ from the corresponding vanadium(IV) complex 4 under aerobic conditions was found to be an excellent catalyst for asymmetric transcyanation of aliphatic aldehydes with acetone cyanohydrin as the cyanide source, showing high enantioselectivity of 91–95% ee.View full abstract -
Yusuke Yoshida, Katsuya Inoue, Mohamedally Kurmoo2008 Volume 37 Issue 5 Pages 504-505
Published: May 05, 2008
Released on J-STAGE: March 29, 2008
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Supplementary materialWe report the rare occurrence of a reversible loss of crystallinity upon dehydration and regain upon rehydration by in situ X-ray diffraction on a single crystal of [MnII(enH)(H2O)][CrIII(CN)6]·H2O and the associated thermal and magnetic properties characterized by an increase of the Curie temperature of the soft ferrimagnet from 42 to 75 K.View full abstract -
Setsuo Funasaka, Koji Kato, Teruaki Mukaiyama2008 Volume 37 Issue 5 Pages 506-507
Published: May 05, 2008
Released on J-STAGE: March 29, 2008
JOURNAL RESTRICTED ACCESSThe use of pyridine-3-sulfonyl chloride (3-PSC) in dehydrating condensation was investigated. This novel reagent was successfully employed as a mild dehydrating reagent for preparing various carboxamides in good to excellent yields from the corresponding carboxylic acids and amines.View full abstract -
Toru Yoshino, Hiroyuki Kagi2008 Volume 37 Issue 5 Pages 508-509
Published: May 05, 2008
Released on J-STAGE: April 05, 2008
JOURNAL RESTRICTED ACCESSThe dissolution rate and solubility of calcite, a polymorph of CaCO3, were determined in aspartic acid (Asp) solutions: Asp inhibited the surface reaction of calcite dissolution but accelerated the transport process. The crossover of these contrastive effects caused a local maximum of the dissolution rate constant and the transition of rate-determining processes. The calcite solubility increased with increasing Asp concentration, which may reflect its association with the change of the calcite surface structure derived from the addition of Asp.View full abstract -
Jianhua Ma, Yihong Du2008 Volume 37 Issue 5 Pages 510-511
Published: May 05, 2008
Released on J-STAGE: April 05, 2008
JOURNAL RESTRICTED ACCESSNanocrystalline TaB2 has been prepared via a simple inorganic solvent thermal route by the reaction of metallic magnesium powders with tantalum pentoxide and boric acid in an autoclave at 650 °C. X-ray powder diffraction patterns indicate that the product was hexagonal tantalum diboride. Scanning electron microscopy images show that it consisted of particles with an average size of about 40 nm. The product was also studied by BET and TGA.View full abstract -
Biswanath Das, Boddu Shashi Kanth, Kongara Ravinder Reddy, Gandham Sat ...2008 Volume 37 Issue 5 Pages 512-513
Published: May 05, 2008
Released on J-STAGE: April 05, 2008
JOURNAL RESTRICTED ACCESSPPh3/CCl4 system has been employed for the stereoselective synthesis of (Z)- and (E)-allyl chlorides from Baylis–Hillman adducts in excellent yields.View full abstract -
Yingpu Bi, Gongxuan Lu2008 Volume 37 Issue 5 Pages 514-515
Published: May 05, 2008
Released on J-STAGE: April 05, 2008
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Supplementary materialThe morphologies of silver nanocrystals have been successfully tuned from wire to versatile rod, cube, and sphere by varying the molecular structure of polyols. Effects of crystal shape on the catalytic performance of silver for hydrogen generation from HCHO solution have also been investigated. It was found that silver nanocubes were more active than nanorods, nanowires, and nanospheres.View full abstract -
Kin-ya Tomizaki, Shinkichi Shimizu, Masami Onoda, Yuichi Fujioka2008 Volume 37 Issue 5 Pages 516-517
Published: May 05, 2008
Released on J-STAGE: April 05, 2008
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Supplementary materialWe describe an acid dissociation constant (pKa)-based screening of chemical absorbents to treat a gas stream containing carbon dioxide (CO2) in a wide range of partial pressures (0.1–4 MPa). The solubility differences of CO2 in aqueous amine solutions at 40 and 70 °C plotted against pKa revealed volcano-shaped profiles. The availability of amines with pKa values suitable for capture/release cycles of CO2 with targeted partial pressures shows that the pKa-based screening method would be useful to develop advanced greenhouse gas control technologies.View full abstract -
Shigetaka Hayano, Yasuo Tsunogae2008 Volume 37 Issue 5 Pages 518-519
Published: May 05, 2008
Released on J-STAGE: April 05, 2008
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Supplementary materialA new method for catalytic block copolymerization of cyclic olefins was developed for the first time. Cross metathesis was successfully utilized as a reversible chain-transfer reaction. Sequential addition of plural monomers to the polymeric terminal olefin provided a block copolymer of Mw⁄Mn≈2.0. This paper also focuses on the development of a new crystalline–amorphous block copolymer, hydrogenated stereoblock copoly(endo-dicyclopentadiene).View full abstract -
Takeaki Iwamoto, Dongzhu Yin, Sven Boomgaarden, Chizuko Kabuto, Mitsuo ...2008 Volume 37 Issue 5 Pages 520-521
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
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Supplementary material1,3-Digermabicyclo[1.1.0]butane 2 was synthesized as yellow crystals. The molecular structure, 13C NMR and UV–vis spectra, and theoretical calculations have revealed that 2 is a typical long bond isomer, similarly to the silicon congener 1. Structural comparison between 1 and 2 is achieved.View full abstract -
Takakazu Nakabayashi, Hui-Ping Wang, Kazuo Tsujimoto, Seiji Miyauchi, ...2008 Volume 37 Issue 5 Pages 522-523
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
JOURNAL RESTRICTED ACCESSEffects of an external electric field have been measured for Halobacterium salinarum loaded with fluorescent dye BCECF. Aggregates of the halobacteria are effectively formed by an electric field. The fluorescence lifetime of BCECF remains unchanged after the formation of the aggregates, suggesting that intracellular environments are not affected significantly by an external electric field in spite of the aggregate formation.View full abstract -
Sang Kyun Chae, Seong Hun Kim, Jong-Man Kim2008 Volume 37 Issue 5 Pages 524-525
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
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Supplementary materialA simple and straightforward strategy for the fabrication of layered conjugated polydiacetylene supramolecules on electrospun polymer fibers, based on the layer-by-layer deposition technique, was developed.View full abstract -
Xinyu Zhang, Sumedh P. Surwade, Vineet Dua, Ryan Bouldin, Neha Manohar ...2008 Volume 37 Issue 5 Pages 526-527
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
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Supplementary materialBulk quantities of parent polythiophene nanofibers can be synthesized rapidly and in one step by chemical oxidative polymerization of thiophene by FeCl3 using freeze-dried vanadium pentoxide nanofibers as seeds.View full abstract -
Y. Thirupathi Reddy, P. Narsimha Reddy, P. Raghotham Reddy, Peter A Cr ...2008 Volume 37 Issue 5 Pages 528-529
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
JOURNAL RESTRICTED ACCESSAn efficient method for the synthesis of simple and sterically hindered carboxamides from various carboxylic acids and amines using tetrabenzylpyrophosphate (TBPP) as a coupling agent in the presence of 4-(dimethylamino)pyridine (DMAP) is described. The reaction is operationally straightforward, proceeds under mild conditions at room temperature, and affords the desired product in high yield.View full abstract -
Feng Dang, Naoya Enomoto, Junichi Hojo, Keiji Enpuku2008 Volume 37 Issue 5 Pages 530-531
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
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Supplementary materialMonodispersed ca. 30 nm magnetite nanoparticles were synthesized in a 20/80 ethanol–water solution under ultrasonic irradiation. Both the ethanol–water solution and ultrasonic irradiation were important for the synthesis of the monodispersed magnetite nanoparticles. The ethanol–water solvent improved the monodispersibility of the magnetite particles, on the other hand, limited the formation of magnetite under mechanical stirring. The 100% cubic magnetite particles were successfully synthesized in ethanol–water solution under ultrasonic irradiation.View full abstract -
Reiko Shibata, Kazuhide Koike, Hisao Hori, Hitoshi Tamiaki2008 Volume 37 Issue 5 Pages 532-533
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
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Supplementary materialZinc chlorophyll derivatives possessing (multi)-perfluoroalkyl chain(s) in the 17-propionate residue were dissolved in liquid carbon dioxide to form their oligomers (=J-aggregates), while the alkyl-type analog was insoluble in the medium. These results indicated solubilization and stabilization of their supramolecules by an interaction between the perfluoroalkyl substituents and liquid carbon dioxide.View full abstract -
Gangyi Shen, Xinling Yang, Jian Cui, Meiyang Zhou, Yun Ling2008 Volume 37 Issue 5 Pages 534-535
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
JOURNAL RESTRICTED ACCESSA new pyridine heterocyclic β-cyclodextrin derivative, heptakis[2,6-di-O-pentyl-3-O-(2-chloro-5-pyridyl)methyl]-β-CD, was synthesized and explored as chiral stationary phase in capillary gas chromatographic separation. Cyclopropane derivatives with two chiral centers including four configurational isomers or three chiral centers including eight configurational isomers were well separated, which indicated the new pyridyl β-CD derivative possessing excellent chiral selectivity for separation of complex compounds including multichiral centers.View full abstract -
Yuki Kudo, Moeka Nishiwaki, Yoriko Inoue, Nobuko Seino, Tatsuro Nakaga ...2008 Volume 37 Issue 5 Pages 536-537
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
JOURNAL RESTRICTED ACCESSIgA ELISA was performed in a droplet using an ink-jet microchip for shortening the reaction time, saving the reaction reagents. Forty-five dimples (500-μm i.d., 100-μm depth) were prepared on a PDMS (polydimethylsiloxane) microchip plate (30×30 mm) for the reaction vessels. After the dimple was pored with nanoliter water containing glycerin, an antibody solution was firstly added for immobilization on the dimple, and then nanoliter reaction regents for ELISA (enzyme-linked immunosorbent assay) were added sequentially using an ink-jet chip. A good linear relationship between the fluorescence intensity of Ample®Red and concentration of IgA was obtained with each reaction time of 150 s.View full abstract -
Sanami Yazaki, Yuko Kamikawa, Masafumi Yoshio, Atsushi Hamasaki, Tomoh ...2008 Volume 37 Issue 5 Pages 538-539
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
JOURNAL OPEN ACCESS
Supplementary materialLiquid-crystalline (LC) behavior and ionic conductivities of imidazolium salts containing an L-glutamic acid moiety have been studied. The ionic conductivities of the (CF3SO2)2N− salt forming the columnar LC phase are higher than those of the Br− salt in the columnar LC state. The ionic conductivity shows a sudden decrease at the columnar–micellar cubic LC transition of the Br− salt.View full abstract -
Babak Kaboudin, Hazegh Zahedi2008 Volume 37 Issue 5 Pages 540-541
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
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Supplementary materialA simple, efficient, and general method has been developed for the one-pot synthesis of α-aminophosphonic esters, under solvent-free conditions, with the use of CaCl2 as a Lewis base catalyst. The esters were obtained under mild conditions and in high yield (80 to 96%) and purity. They were synthesized by the reaction of diethyl phosphite with a mixture of aldehydes and amines, in the presence of CaCl2, and under solvent-free conditions. Major advantages of this protocol are: high yields, inexpensive method, making use of a non-toxic catalyst and finally mild and solvent-free conditions.View full abstract -
Atsunori Mori, Atsushi Sugie, Hirotoshi Furukawa, Yuji Suzaki, Kohtaro ...2008 Volume 37 Issue 5 Pages 542-543
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
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Supplementary materialThe reaction of aryl(halo)platinum(II)(bpy) complexes with thiophene derivatives causes novel electrophilic substitution in the presence of AgNO3/KF as an activator to form thienyl complexes in 65–91% yields. The related reaction with (dihalo)platinum(II) also takes place to afford dithienylplatinum(II) complexes.View full abstract -
Jong-Hyung Kim, Mohamed E. El-Khouly, Yasuyuki Araki, Osamu Ito, Kwang ...2008 Volume 37 Issue 5 Pages 544-545
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
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Supplementary materialPhotoinduced processes of a newly synthesized subphthalocyanine–diazobenzene–fullerene triad have been studied by the time-resolved spectroscopic techniques. On photo-excitation of subphthalocyanine (SubPc) moiety, the fluorescence quenching of SubPc was observed, suggesting the energy-transfer process from singlet excited energy of the light-harvesting SubPc to C60 through diazobenzene. This finding is confirmed by the nanosecond transient absorption of the triplet excited state of C60.View full abstract -
Yoshifumi Yamaguchi, Shinsuke Haraguchi, Naotoshi Nakashima2008 Volume 37 Issue 5 Pages 546-547
Published: May 05, 2008
Released on J-STAGE: April 12, 2008
JOURNAL RESTRICTED ACCESSShortened single-walled carbon nanotubes having anionic charges were immobilized in a cationic vinyl monomer-photografted poly(ethylene terephthalate) film. The present method is simple and useful for preparing polymer/nanotube hybrid films via the polyion-complexation of cationic photografted polymer films and anionic CNTs.View full abstract -
Tomohisa Moriguchi, Fumisada Yamato, Kazuo Shinozuka2008 Volume 37 Issue 5 Pages 548-549
Published: May 05, 2008
Released on J-STAGE: April 19, 2008
JOURNAL RESTRICTED ACCESSThis paper deals with the synthesis and properties of novel oligodeoxynucleotide containing 6,3′-methanodeoxyuridine which is connected between C-6 of pyrimidine base and C-3′ of deoxyribose by a methylene group. The modified base was successfully introduced into the oligodeoxynucleotide by the standard method. The modified oligodeoxynucleotide formed the less stable duplex with both complementary DNA and RNA. The CD spectra indicated that the duplex formed the noncanonical duplex structure distinct from the A-form or B-form structure.View full abstract -
Darshak R. Trivedi, Yuzo Fujiki, Yuta Goto, Norifumi Fujita, Seiji Shi ...2008 Volume 37 Issue 5 Pages 550-551
Published: May 05, 2008
Released on J-STAGE: April 19, 2008
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Supplementary materialA colorimetric indicating system has been developed using solid-state charge-transfer complexation to demonstrate color changes in response to various aromatic compounds and their isomers that provide no color changes under diluted solution conditions.View full abstract -
Atsushi Shirai, Yasuhisa Ikeda2008 Volume 37 Issue 5 Pages 552-553
Published: May 05, 2008
Released on J-STAGE: April 19, 2008
JOURNAL RESTRICTED ACCESSKinetic studies on complexation reactions of LiI with cryptand C211 in N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethylsulfonyl)imide (DEMETFSI) and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMITFSI) have been carried out using 7Li NMR. It was found that the reaction rates in both solutions depend on concentrations of free LiI and that their kinetic parameters are almost same. From these results, it is proposed that the LiI complexation reactions in DEMETFSI and EMITFSI solutions proceed though bimolecular mechanism.View full abstract -
Yu Cao, Li Ming Tang, Yu Jiang Wang, Bo Yuan Zhang, Lian Kun Jia2008 Volume 37 Issue 5 Pages 554-555
Published: May 05, 2008
Released on J-STAGE: May 05, 2008
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Supplementary materialA new gelator synthesized from 1,3,5-benzenetricarboxylic acid (BTA) and 4-hydroxypyridine (PHP) was capable of gelling water under different ultrasound power. The resulting gels were investigated by gel-to-sol dissociation temperature (Tgel), SEM, DSC, and rheology measurement, which showed that the assembling structures and gel properties were correlated to the ultrasound power.View full abstract -
Kei Shimoda, Sou Sakamoto, Nobuyoshi Nakajima, Hatsuyuki Hamada, Hirok ...2008 Volume 37 Issue 5 Pages 556-557
Published: May 05, 2008
Released on J-STAGE: May 05, 2008
JOURNAL RESTRICTED ACCESSFarnesol and geraniol were glucosylated to the corresponding unnatural β-glucosides, which were two new biotransformation products, by cultured plant cells of Eucalyptus perriniana, Strophanthus gratus, and Phytolacca americana. Cultured E. perriniana cells glycosylated (S)-perillyl alcohol to two β-glycosides, i.e., β-glucoside and unnatural β-gentiobioside, whereas only perillyl β-glucoside was produced by S. gratus and P. americana. Perillyl β-glucoside was further converted into two unnatural β-maltooligosaccharides, i.e., β-maltoside and β-maltotrioside, by cyclodextrin glucanotransferase.View full abstract -
Shunsuke Kondo, Chiyo Yamamoto, Masami Kamigaito, Yoshio Okamoto2008 Volume 37 Issue 5 Pages 558-559
Published: May 05, 2008
Released on J-STAGE: May 05, 2008
JOURNAL RESTRICTED ACCESSTwo novel amylose derivatives 1a and 1b bearing different substituents at 2-, 3-, and 6-positions of a glucose ring have been successfully synthesized, and their abilities of enantiomer resolution in high-performance liquid chromatography (HPLC) have been evaluated. These derivatives exhibited the ability comparable or better to the commercial amylose-based column, Chiralpak AD.View full abstract -
Kazuya Kitada, Masafumi Kobune, Wataru Adachi, Tetsuo Yazawa, Hiroyuki ...2008 Volume 37 Issue 5 Pages 560-561
Published: May 05, 2008
Released on J-STAGE: May 05, 2008
JOURNAL RESTRICTED ACCESSBi(Ni0.5Ti0.5)O3 (BNT) ceramics with a perovskite structure, which were almost impossible to fabricate under atmospheric pressure, were synthesized at a high pressure of 6 GPa using a multianvil-type high-pressure apparatus. It was confirmed that the synthesized samples had a multidomain structure and ferroelectricity on the basis of scanning nonlinear dielectric microscopy (SNDM) and polarization–electric field (P–E) hysteresis loop measurements.View full abstract
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