-
Ilsin An, Deokkyeong Seong
2004 Volume 33 Issue 10 Pages
1232-1233
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
Gold thin film is found to be soluble in chlorine-containing liquid such as 1,2-dichloroethane, NaCl, or HCl solution under illumination, especially UV shorter than 310 nm. We attribute this to the formation of gold chloride and its desorption from the surface. Atomic force microscopy study shows that the grain-like surface morphology evolves during the etch process.
View full abstract
-
Akito Hoshino, Mikio Nakamura
2004 Volume 33 Issue 10 Pages
1234-1235
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
Weakness of various neutral ligands having oxygen as coordination atom was ranked on the basis of the pyrrole proton chemical shifts of planar [Fe(TPP)L
2]
+. Furthermore, weakness of the ligands, which is difficult to determine from the NMR data of planar [Fe(TPP)L
2]
+, was successfully differentiated by the use of highly ruffled [Fe(T
iPrP)L
2]
+. Among the 10 ligands examined, THF turned out to be the weakest ligand.
View full abstract
-
Kensuke Naka, Hideaki Itoh, Yoshiki Chujo
2004 Volume 33 Issue 10 Pages
1236-1237
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
Wire-like aggregates of palladium nanoparticles with a length up to several micrometer were produced by stirring palladium(II) acetate with the G1.0 poly(amidoamine) (PAMAM) dendrimer in methanol at room temperature via self-organized wire-like templates of palladium ions and the PAMAM dendrimer.
View full abstract
-
A. Benhmid, K. V. Narayana, A. Martin, B. Lücke, M.-M. Pohl
2004 Volume 33 Issue 10 Pages
1238-1239
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
Extremely high benzyl acetate selectivity (ca. 94%) at a toluene conversion of ca. 60% was achieved over Pd–Cu–TiO
2 catalyst for the first time by gas phase acetoxylation of toluene with good long-term stability.
View full abstract
-
Hirohisa Ohmiya, Hideki Yorimitsu, Koichiro Oshima
2004 Volume 33 Issue 10 Pages
1240-1241
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
Treatment of 2-chloropyridine with benzylmagnesium chloride in the presence of a catalytic amount of cobalt(II) acetylacetonate in dioxane afforded the corresponding cross-coupling product in excellent yield. Trimethylsilylmethyl and phenyl Grignard reagents also participated in similar cross-coupling reactions.
View full abstract
-
Pengyi Zhang, Juan Liu, Zhongliang Zhang
2004 Volume 33 Issue 10 Pages
1242-1243
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
The photocatalytic degradation rate of gaseous toluene under irradiation of vacuum ultraviolet (185 nm) was 2–3 times faster than that under irradiation of 254 nm. The 185-nm VUV photolysis was greatly improved by the presence of TiO
2 photocatalyst.
View full abstract
-
Tsutomu Ishi-i, Kentaro Yaguma, Thies Thiemann, Masataka Yashima, Kazu ...
2004 Volume 33 Issue 10 Pages
1244-1245
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
Supplementary material
2,4,6-Tris[4-(1-naphthyl)phenyl]-1,3,5-triazine exhibited a high electron drift mobility of 8.0 × 10
−4 cm
2 V
−1 s
−1.
View full abstract
-
Takashi Jobashi, Masaomi Takano, Tetsuo Hino, Katsuya Maeyama, Keigo F ...
2004 Volume 33 Issue 10 Pages
1246-1247
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
In the presence of boron trifluoride etherate, some kinds of aliphatic ethers have been found to react with benzaldehyde dimethyl acetal yielding α,β-unsaturated carbonyl compounds with evolution of H
2. In this reaction, dehydrogenation of the ether undergoes in cooperation with the acetal and BF
3, which enables the ether molecule to behave as enol ether equivalent affording crossed aldol adduct via nucleophilic attack to oxycarbenium ion electrophile formed from the acetal.
View full abstract
-
Wei Shan, Bo Wang, Ya-Hong Zhang, Bi-Yun Wu, Yi Tang
2004 Volume 33 Issue 10 Pages
1248-1249
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
A new approach involving the in situ hydrolysis of diethyl carbonate in calcium-containing solution was proposed for the controlled precipitation of CaCO
3. CaCO
3 crystals with exquisite morphologies and colors have been fabricated through this approach in the presence of organic molecules.
View full abstract
-
Atsushi Satsuma, Hitoshi Yokoi, Hiroyuki Nishiyama, Shiro Kakimoto, Sa ...
2004 Volume 33 Issue 10 Pages
1250-1251
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
Direct observation of WO
3/ZrO
2 by using high-resolution TEM images revealed the formation of polytungstate cluster with a narrow size distribution ranging in 0.4–0.7 nm, and the agglomeration into monolayer tungstate after the aging at 1073 K for 100 h.
View full abstract
-
Ken-ichi Aika, Hidenobu Kobayashi, Kenji Harada, Koji Inazu
2004 Volume 33 Issue 10 Pages
1252-1253
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
A thermo-stable anion exchange resin–Raney Cu system was found as the most effective solid catalyst for low-temperature liquid-phase methanol synthesis at 373 to 393 K under 5.0 MPa of syngas (2H
2/CO). With the catalyst (20 mL of the resin and 2.0 g of Cu) suspended in methanol solution 72% of CO was converted to methanol (70%) and methyl formate (HCOOCH
3) (30%) in 4 h.
View full abstract
-
Haijun Chen, Masaya Matsuoka, Jinlong Zhang, Masakazu Anpo
2004 Volume 33 Issue 10 Pages
1254-1255
Published: 2004
Released on J-STAGE: August 28, 2004
JOURNAL
RESTRICTED ACCESS
Cu(I)SAPO-5 catalysts prepared by a combination of ion-exchange and an evacuation treatment at high temperatures were found to exhibit a fairly high photocatalytic activity for the decomposition of N
2O into N
2 and O
2 under UV-light irradiation at 298 K. In contrast to other Cu(I) catalysts, such as Cu(I)ZSM-5, the coexistence of H
2O in the reaction system of the Cu(I)SAPO-5 scarcely affected the photocatalytic activity. The relationship between the photoluminescence behavior due to the presence of Cu(I) species and the photocatalytic activity of Cu(I)SAPO-5 have been investigated as a function of the Si/Al ratio, showing that the excited state of the Cu(I) species plays a significant role in the photocatalytic reaction as an active site for the reaction.
View full abstract
-
Kazuaki Matsumoto, Ryotaro Tsuji, Yoshiharu Yonemushi, Tatsushi Yoshid ...
2004 Volume 33 Issue 10 Pages
1256-1257
Published: 2004
Released on J-STAGE: October 05, 2004
JOURNAL
RESTRICTED ACCESS
A mercapto-terminated linear polymer, which was prepared by a reversible addition-fragmentation chain transfer (RAFT) technique, was used to modify semiconductor nanoparticle surfaces. This modification resulted in an easier dispersion of the nanoparticles in the resins by a simple mixing process, as confirmed by transmission electron microscopy.
View full abstract
-
Mostafa A. S. Hammam, Yasue Murata, Hideki Kinoshita, Katsuhiko Inomat ...
2004 Volume 33 Issue 10 Pages
1258-1259
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
A sterically locked biliverdin derivative was synthesized by developing an efficient method for the preparation of
Z-
anti C/D-ring component toward investigation of the stereochemistry and function of the phytochrome chromophores.
View full abstract
-
Akihide Iwase, Hideki Kato, Hiroaki Okutomi, Akihiko Kudo
2004 Volume 33 Issue 10 Pages
1260-1261
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
Powders of NaTaO
3 doped with alkaline earth metal ions were prepared. Scanning electron microscopy observation revealed that NaTaO
3 crystals doped with Ca, Sr, and Ba became smaller than nondoped NaTaO
3 crystals. In addition, nano-step structures were constructed on the surfaces of NaTaO
3 doped with Ca, Sr, and Ba. The photocatalytic activity of water splitting on NaTaO
3 was improved by the doping of Ca, Sr, and Ba. It is due to the small particle size and the formation of surface nano-step structures as observed for La doping.
View full abstract
-
Keiko Kobayashi, Hiroki Shimogawa, Akira Sakakura, Toshiaki Teruya, Ki ...
2004 Volume 33 Issue 10 Pages
1262-1263
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
A novel cysteine derivative, spongiacysteine (
1), was isolated from marine sponge
Spongia sp. The gross structure was elucidated by detailed spectroscopic analysis, and the absolute stereostructure was established by its total synthesis. This compound showed moderate antimicrobial activity against rice blast fungus
Pyricularia oryzae.
View full abstract
-
Katsuyuki Aoki, Toshiki Nagae, Rei Matsubara, Ikuhide Fujisawa
2004 Volume 33 Issue 10 Pages
1264-1265
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
Tetramethylated resorcin[4]arene (MRCT) forms ‘head-to-head’ arranged self-dimers incorporating neutral guest molecules methanol, ethanol, and imidazole within the cavity, with the MRCT:guest composition of 2:2, while unsubstituted resorcin[4]arene forms 1:1 monomers, showing the significance of the methyl substituents of the MRCT rings in the capsule formation through methyl···methyl hydrophobic interactions between the facing substructures, as evidenced by X-ray diffraction.
View full abstract
-
Hitoshi Ohishi, Masatake Tanaka, Hiroshi Kageyama, Yasuhiko Shirota
2004 Volume 33 Issue 10 Pages
1266-1267
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
A novel class of amorphous molecular materials, thiophene- and selenophene-containing tris(oligoarylenyl)amines, were developed. They were found to exhibit high hole drift mobilities greater than 10
−2 cm
2V
−1s
−1 at an electric field of 1.0 × 10
5 Vcm
−1 at 293 K in their amorphous glassy states. These values are of the highest level among those reported for organic disordered systems.
View full abstract
-
Toshio Itoh, Tetsuya Shichi, Tatsuto Yui, Hiroki Takahashi, Katsuhiko ...
2004 Volume 33 Issue 10 Pages
1268-1269
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
Variation in the coloration of LDH clay-intercalated poly(diacetylenecarboxylates), i.e., poly-[
m,
n]/LDH, was found to be dependent on the conformations of the carboxylates within the hybrid which were quite sensitive to the carbon numbers,
m and
n, in the alkyl chains.
View full abstract
-
Youwei Yao, Qiang Cai, Huizhong Kou, Hengde Li, Dan Wang, Ranbo Yu, Yu ...
2004 Volume 33 Issue 10 Pages
1270-1271
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
A novel coordination polymer, [(NA)(ONA) Mn(II)]
n (HNA = nicotinic acid; H
2ONA = 2-hydroxynicotinic acid) has been hydrothermally synthesized. Its structure is constructed by mixed-ligands and chains of hexa-coordinated Mn(II) linkers: ONA groups bridge Mn ions to give the right-handed and left-handed helical [(ONA)Mn]
n chains running along (010). The helical chains are further held together by NA groups to form a novel 3-D framework.
View full abstract
-
Hongwei Hou, Qing Yang, Chenrong Tan, Guangbin Ji, Benxi Gu, Yi Xie
2004 Volume 33 Issue 10 Pages
1272-1273
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
A solution-phase route has been developed for the synthesis of cobalt phosphide nanorods, which have been characterized by techniques of X-ray diffraction (XRD), electron microscope (SEM), and X-ray photoelectron spectroscope (XPS). The microscope analysis reveals that the nanorods have width of about 10 nm and length of 200–300 nm, which exhibit paramagnetic behavior down to 2 K, determined by a commercial superconducting quantum interference device (SQUID) magnetometer.
View full abstract
-
Akira Katoh, Mika Yamaguchi, Ryota Saito, Yusuke Adachi, Hiromu Sakura ...
2004 Volume 33 Issue 10 Pages
1274-1275
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
Four kinds of vanadyl–hydroxythiazolethione complexes with VO(S
2O
2) coordination mode were newly synthesized, and demonstrated for the first time that the insulinomimetic activity apparently correlates to the Hammett’s substituent constant of the ligands.
View full abstract
-
Bunpei Hatano, Akiko Aikawa, Hideyuki Tagaya, Hiroki Takahashi
2004 Volume 33 Issue 10 Pages
1276-1277
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
The simple inclusion complex of bisphenol A (
3) with quinoline (
4) was obtained from the several solutions, and this method was useful for the recovery of
3 from the water solution.
View full abstract
-
Sang Hyun Park, Hui Jeong Gwon, Kyung Bae Park
2004 Volume 33 Issue 10 Pages
1278-1279
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
A facile one-pot synthesis of
188Re-complex as a bifunctional chelating agent for the preparation of therapeutic radiopharmaceuticals was accomplished with good labeling yields and radiochemical purity by using a tetrahydroborate exchange resin as a reducing agent for a disulfide ligand as well as the [
188Re]perrhenate ion under microwave irradiation.
View full abstract
-
Kazunori Hirabayashi, Yoshiko Nara, Toshio Shimizu, Nobumasa Kamigata
2004 Volume 33 Issue 10 Pages
1280-1281
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
A Mizoroki–Heck-type reaction of telluronium iodides with olefins proceeded under mild conditions to produce substituted olefins in high yields. The reaction required a catalytic amount of palladium(II) species and a stoichiometric amount of silver(I) acetate as an additive.
View full abstract
-
Wei Liu, Hao-Hong Chen, Xin-Xin Yang, Man-Rong Li, Ming-Hui Ge, Jing-T ...
2004 Volume 33 Issue 10 Pages
1282-1283
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
A new organically templated cadmium chlorophosphate, (C
3H
6N
2)[Cd
2Cl
2(HPO
4)
2] (C
3H
6N
2 = diprotonated imidazole) with a novel layered structure, was synthesized hydrothermally in the presence of imidazole as a structure-directing agent. This is the first example of a cadmium chlorophosphate with polymeric chains that consist of Cd–O/Cl–Cd units.
View full abstract
-
Xinzheng Liu, Fan Guo
2004 Volume 33 Issue 10 Pages
1284-1285
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
Cadmium sulfide tubular crystals, with the range of 0.5–2 mm in length, 10–20 μm in the external diameter and 3–6 μm in the wall thickness, were successfully grown in sodium hydroxide solution via a hydrothermal method at 350 °C. XRD, SEM, and XPS methods characterized the products. A possible growth mechanism for the tubular structure was also proposed.
View full abstract
-
Sen-ichi Aizawa, Tatsuya Kawamoto, Kenji Saito
2004 Volume 33 Issue 10 Pages
1286-1287
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
The phosphine-bridged Pd(II)–Pt(II)–Pd(II) trinuclear and Rh(III)–Pd(II)–Pt(II)–Pd(II)–Rh(III) pentanuclear complexes with tris[2-(diphenylphosphino)ethyl]phosphine (pp
3) ligands were successfully prepared by stepwise phosphine-bridging reaction of the terminal phosphino groups of the pp
3 ligands on the Pd(II) cores.
View full abstract
-
Chawalit Ngamcharussrivichai, Peng Wu, Takashi Tatsumi
2004 Volume 33 Issue 10 Pages
1288-1289
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
ε-Caprolactam was selectively produced through the liquid-phase Beckmann rearrangement of cyclohexanone oxime over HUSY catalyst when the by-products formation was effectively retarded by blockage of the corresponding active centers of pre-adsorbed water and benzonitrile molecules.
View full abstract
-
Yoshiko Koizumi, Shu Seki, Anjali Acharya, Akinori Saeki, Seiichi Taga ...
2004 Volume 33 Issue 10 Pages
1290-1291
Published: 2004
Released on J-STAGE: September 04, 2004
JOURNAL
RESTRICTED ACCESS
Oligofluorenes with well-defined chain length (
n = 1–5) have been synthesized by step-by-step Suzuki coupling reaction as the basis sets of conjugated segments in polyfluorenes. Cation and anion radicals of oligofluorenes (
n > 2) showed intense and clear three infrared absorptions attributed to transitions between SOMO state delocalized over fluorene moieties and valence (HOMOs) or conduction states (LUMOs) in the backbone. The transition energies of the IR band decreased linearly from 1.2 to 0.55 eV in the range of unit number while 1-D exciton transition energies showed apparent saturation at
n > 5. This implied that delocalization degree of excess electrons or holes along fluorene chains would saturate at larger number of units than that of neutral excitons.
View full abstract
-
Sujin Kim, Hyun-Seung Ryu, Hyunho Shin, Hyun Suk Jung, Kug Sun Hong
2004 Volume 33 Issue 10 Pages
1292-1293
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Nucleation of hydroxyapatite (HAP) nanocrystals from amorphous calcium phosphate (ACP) nanoparticles in a stoichiometric calcium/phosphate aqueous solution was directly observed by dark field transmission electron microscopy. This observation is a direct evidence of internal arrangement process for the ACP–HAP conversion, while it is against the view of ACP dissolution/reprecipitation for HAP formation in a stoichiometric calcium/phosphate aqueous solution.
View full abstract
-
Xiangying Chen, Zhenghua Wang, Xiong Wang, Junxi Wan, Jianwei Liu, Yit ...
2004 Volume 33 Issue 10 Pages
1294-1295
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Metastable Ni
3S
4 with good crystallinity has been firstly synthesized via a single-source approach using nickel diethyldithiocarbamate as precursor under hydrothermal conditions. The optical properties of the as-prepared Ni
3S
4 are evaluated. It is found that the reaction temperature is of importance to the formation of Ni
3S
4 crystallites.
View full abstract
-
Jean-Cyrille Hierso, Vladimir V. Ivanov, Régine Amardeil, Phili ...
2004 Volume 33 Issue 10 Pages
1296-1297
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
As a powerful route to multidentate ferrocenylphosphines, the synthetic strategy which consists in successively reacting FeCl
2 with the suitably substituted cyclopentadienyllithium salts was carried out. The new mixed diaryl/alkyl triphosphine 1,2-bis(diphenylphosphino)-1′-(diisopropylphosphino)-4-
tert-butylferrocene, Fc(P)
2tBu(P
iPr), was obtained in good yield (70%). A very rare
through-space nuclear spin–spin coupling
JCP = 5.5 Hz was evidenced from its reported
13C NMR and X-ray molecular structure characterizations.
View full abstract
-
Akihiro Orita, Takehiko Nakano, Taisaku Yokoyama, Govindarajulu Babu, ...
2004 Volume 33 Issue 10 Pages
1298-1299
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
The arylene–ethynylene arrays involving pyridine were constructed successfully by taking advantage of double elimination reaction of β-substituted sulfones (sulfoximines) which are easily accessible from arylmethyl sulfones (sulfoximines) and aromatic aldehydes. This protocol was utilized for synthesis of an enantiopure arylene–ethynylene framework bearing a binaphthyl stereogenic core.
View full abstract
-
Keiko Nunokawa, Tetsuya Sunahara, Satoru Onaka, Kazuya Okazaki, Hiroyu ...
2004 Volume 33 Issue 10 Pages
1300-1301
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
A novel Au
12 supramolecule (
12) composed of two-, three-, and four-coordinated Au(I) centers was constructed on the S
3 scaffolding (trithiocyanurate, S
3C
3N
33−).
12 can be regarded as a tetramer of the Au
3 unit, [AuP(3-CF
3–C
6H
4)
3]
3(S
3C
3N
3) by losing four P(3-CF
3–C
6H
4)
3 ligands upon tetramerization. A congener of the monomer unit [AuP(2-py)(C
6H
5)
2]
3(S
3C
3N
3) (
2) was also synthesized; X-ray study on
2 revealed in turn a monomer structure.
View full abstract
-
Koichiro Jitsukawa, Mamoru Mizutani, Hidekazu Arii, Ichiro Kubo, Yasuy ...
2004 Volume 33 Issue 10 Pages
1302-1303
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Characteristics of pyrimidine bases are demonstrated on the crystals of the ternary copper(II) complexes consisting of bpy and pyrimidine-amino acid. Hemiprotonated CH
+:C pair is important for the formation of intermolecular triple hydrogen bonding interaction, mimicking
i-motif of DNA. The electron-donating effect in thymine ring among pyrimidine bases also promotes intermolecular π–π stacking interaction.
View full abstract
-
Mitsuo Sato, Yasuhiko Gunji, Taketo Ikeno, Tohru Yamada
2004 Volume 33 Issue 10 Pages
1304-1305
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Aerobic oxidation with the combined use of phenylsilane and a manganese complex catalyst was successfully applied to the α,β-unsaturated carboxamide containing a
C2-symmetrical chiral auxiliary to afford the corresponding α-hydroxycarboxamide in good-to-high yield with high stereoselectivity.
View full abstract
-
Kazumasa Yazu, Mitsunori Makino, Koji Ukegawa
2004 Volume 33 Issue 10 Pages
1306-1307
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Dibenzothiophenes are oxidized effectively with H
2O
2 in the presence of acid catalysts in a tetradecane/AcOH biphasic system. The oxidation proceeds in the AcOH phase and most of the oxidation products stay there, resulting in the successive removal of the dibenzothiophenes from the tetradecane phase. Using this biphasic oxidation system can effectively reduce the sulfur content in diesel oil.
View full abstract
-
Sandra Lock, Norikazu Miyoshi, Makoto Wada
2004 Volume 33 Issue 10 Pages
1308-1309
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
A new solvent-free procedure for the synthesis of β-amino carbonyl compounds in generally moderate to excellent yields has been developed. Three-component Mannich-type couplings between aldehydes (aromatic, aliphatic, alicyclic, and heterocyclic), aromatic amines and silyl enol equivalents proceeded smoothly on a conveniently prepared and reusable phosphoric acid-silica gel solid support.
View full abstract
-
Seungdo Kim, Young-Chun Kim, Eun-Suk Jang
2004 Volume 33 Issue 10 Pages
1310-1311
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
This paper demonstrates how to derive Arrhenius parameters as well as reaction model of pyrolysis reaction of high density polyethylene (HDPE) from isothermal kinetic data. We introduced a state-of-the-art thermobalance that enables to record a weight decrease with time under pure static condition. As a result of comparing experimental reduced time plots (RTPs) with theoretical ones, the pyrolysis reaction of HDPE accommodates “contracting cylinder” model, allowing its model to be 2(1−α)
1/2. The reaction model derive here was used to evaluate each Arrhenius parameters from isothermal and non-isothermal data. A couple of evidences strongly support the properness of the reaction model derived from RTP and the corresponding Arrhenius parameters.
View full abstract
-
Toru Odani, Shuji Okada, Chizuko Kabuto, Tatsumi Kimura, Hiro Matsuda, ...
2004 Volume 33 Issue 10 Pages
1312-1313
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Solid-state polymerization of 4,4′-butadiynedibenzylammonium disorbate was investigated. The quantitative polymer yield of the diene moieties was achieved under UV-, X-ray, and γ-ray irradiation, whereas the conversion of diyne moieties was low. X-ray crystal structure analyses of monomer and polymer crystals show the polymerization proceeded under topochemical polymerization mechanism indeed.
View full abstract
-
Zhen-Hua Liang, Ying-Jie Zhu
2004 Volume 33 Issue 10 Pages
1314-1315
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Single-crystalline CuO nanoleaves with an average thickness of about 10 nm and with lateral sizes of hundreds of nanometers to several micrometers have been successfully synthesized by microwave-heating of an aqueous solution containing copper salt and sodium hydroxide. CuO nanoleaves were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and UV–vis absorption spectrum. The band gap of CuO nanoleaves was estimated to be ≈2.13 eV, which shows significant blue-shift compared with that of the bulk.
View full abstract
-
Yusuke Yamazaki, Ken-ichi Fujita, Ryohei Yamaguchi
2004 Volume 33 Issue 10 Pages
1316-1317
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Addition reactions of ethynyltrimethylsilane to various quinolines and isoquinolines activated by acyl chloride are catalyzed with a few Ir-complexes to afford 2-trimethylsilylethynyl-1,2-dihydroquinolines and 1-trimethylsilylethynyl-1,2-dihydroisoquinolines in good to high yields.
View full abstract
-
Lianhai Lu, Roland A. Fischer
2004 Volume 33 Issue 10 Pages
1318-1319
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Nano Cu
2O particles with size of about 7 nm were directly coated on the surface of ZnO seeds by UV light-induced photoreduction of Cu(NO
3)
2·3H
2O, forming Cu
2O/ZnO nanocomposites with a core-shell structure.
View full abstract
-
Yue Zhang, Qing Peng, Xun Wang, Yadong Li
2004 Volume 33 Issue 10 Pages
1320-1321
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
The monodisperse ZnS nanospheres were synthesized by a solvothermal method. The nanospheres were characterized using XRD, TEM, UV–vis, and photoluminescence spectra. The results demonstrate that ZnS nanospheres are highly crystalline. The strong photoluminescence emission at 450 nm (blue) can be observed in the ZnS nanospheres.
View full abstract
-
Kohei Gotoh, Yasutaka Matsuura, Fuminori Hatanaka, Setsuko Sato, Shinz ...
2004 Volume 33 Issue 10 Pages
1322-1323
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
We have studied in detail the electronic effect on the reactions of π-allylpalladium with nucleophiles during the reactions of 2-arylsulfonyloxy-3-chloroprop-1-ene with diethyl malonate. The reaction rates increase increasing with the electron-withdrawing effects. We have also shown some synthetic utilization using these 2-arylsulfonyloxyprop-1-enes.
View full abstract
-
Katsuyuki Iwanami, Takeshi Oriyama
2004 Volume 33 Issue 10 Pages
1324-1325
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
A variety of cyanohydrin alkyl ethers were readily prepared from aldehydes with trimethylsilyl cyanide and alkoxy-trimethylsilane under the influence of a catalytic amount of iron(III) chloride in a convenient one-pot procedure.
View full abstract
-
Seung Hoon Han, Tae Sung Si, Sang Man Koo
2004 Volume 33 Issue 10 Pages
1326-1327
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Using aromatic desilylation reaction, monodispersed porous hollow silica particles with spherical shape could be prepared from hollow PPSQ particles via simple treatment with fuming sulfuric acid.
View full abstract
-
Yoshihiro Mizukami
2004 Volume 33 Issue 10 Pages
1328-1329
Published: 2004
Released on J-STAGE: September 11, 2004
JOURNAL
RESTRICTED ACCESS
Electron densities of highest occupied molecular orbitals (HOMO) of 75 congeners of chlorinated dibenzo-
p-dioxins and a nonchlorinated dibenzo-
p-dioxin were calculated. HOMO electron densities are localized mainly in out of plane π orbitals of the 12 carbons and 2 oxygens. These HOMO densities were used as variables in a multivariate statistical analysis. By principal component analysis, the 76 dioxins were classified according to their character. The most toxic dioxins have large negative values of the third principal component scores.
View full abstract
