bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structural and Electrostatic Control of Chemical Modification of Histidine 64 Imidazole in Myoglobin with Cyanogen Bromide and Azide Ion
Authors: Shiro Yoshitsugu 
Published: March 2006

Abstract
I studied modification of the imidazole group of histidine (His) 64 in human myoglobin (Mb) and its mutant (Lys45→Arg; Mb(K45R)) with cyanogen bromide (BrCN) and azide ion (N3−). In wild-type Mb, the modified protein was not obtained, while the modification was successful for mutant Mb(K45R), possibly due to an electrostatic stabilization of the -CN moiety with the Arg45 guanidyl group. This study implies that combination of chemical and recombinant DNA methods open a new method in the protein modification, where an unnatural group can be introduced into a specific site.
Intracomplex Electron Transfer in a Hydrogen-Bonded Porphyrin–Diimide System
Authors: Osuka Atsuhiro , Shiratori Hideo , Yoneshima Ryusho , Okada Tadashi , Taniguchi Seiji , Mataga Noboru 
Published: March 2006

Abstract
Excitation of a hydrogen-bonded complex of zinc porphyrin bearing a 2,6-diacylaminopyridine binding site and N-monosubstituted 1,8:4,5-naphthalene-tetracarboxamide in benzene results in efficient electron transfer to give a charge separated state detectable by picosecond transient absorption spectroscopy.
A New Lignan, (−)-Parabenzoinol, from Parabenzoin trilobum Nakai
Authors: Takaoka Daisuke , Tani Hiroyuki , Nozaki Hiroshi 
Published: March 2006

Abstract
A new tetrahydrofuranol lignan, named (−)-parabenzoinol was isolated from the fresh leaves of Parabenzoin trilobum Nakai (Lauraceae), and its structure has been elucidated by X-ray crystallographic analysis. The isomeric properties of the compound in dimethylsulfoxide solution have been studied on the basis of 1H and 13C NMR spectroscopy.
Effects of Dynamic Process of Hydrogel on Solute Release
Authors: Yonese Masakatu , Sugie Shuichi , Nagata Tsutomu , Kiyohara Kousin 
Published: March 2006

Abstract
Releases of sodium benzoate from calcium alginate (CaAlg) gel beads were studied during deformation processes resulting from the changes of osmotic pressures. The releases were found to be suppressed concomitant with the deformation in the region of high concentrations of adding substances. The suppression was discussed from an advancing boundary.
Synthesis and Structure Determination of an Oxygen-Functionalized Ruthenacycle: Intramolecular Attack of Coordinated Hydroxide on an Acetylenic Ligand
Authors: Oshima Masato , Kobayashi Minoru , Tanaka Masako , Suzuki Hiroharu 
Published: March 2006

Abstract
The reaction of a tetranuclegar hydroxoruthenium complex [(η5-C5Me5)Ru(μ3-OH)]4 (1) with dimethyl acetylenedicarboxylate (DMAD) proceeded at 60 °C to generate a dinuclear oxygen-functionalized ruthenacycle [(η5-C5Me5)Ru]2[μ-η5-OC4(CO2Me)4] (2) via an intramolecular attack of hydroxo ligand on the coordinated C-C unsaturation. The molecular structure of 2 was determined by X-ray diffraction.
Application of Electropolymerized Poly(thiophen derivative)/NBR Composite Film to an Electroluminescence Emission Layer
Authors: Komaba Shin-ichi , Fujihana Kenichiro , Kaneko Norihiko , Osaka Tetsuya 
Published: March 2006

Abstract
A semiconducting composite film of poly(3-substituted thiophen) and insulating nitrile butadiene rubber (NBR) was applied to an emission layer of polymer electroluminescence device. The uniform composite was deposited by electropolymerization of phenyl-, hexyl- and octylthiophen onto an indium-tin oxide glass pre-coated with NBR thin film. By utilizing indium as rectifying contact, visible light was observed from the composites under forward bias. The emission color depended on the substituents in thiophen units.
A Homologation of Aldehydes and Ketones via the Formation and the Subsequent Pummerer-type Ring Fission of 2-Methylsulfinyl-5,6-dihydro-4H-1,3,4-thiadiazine Derivatives
Authors: Shimada Kazuaki , Otaki Akihiro , Yanakawa Masaki , Mabuchi Shosuke , Yamakado Naoya , Shimoguchi Takeshi , Inoue Kazuya , Kagawa Takashi , Shoji Kazutoshi , Takikawa Yuji 
Published: March 2006

Abstract
A two-carbon homologation of aldehydes and ketones was achieved by using a sequence involving the formation and the subsequent Pummerer-type ring fission of 5,6-dihydro-4H-1,3,4-thiadiazine rings possessing methylsulfinyl functionality at C-2.
A Glass Slab Optical Waveguide Detector with an Optical Position Sensor for Flow Analysis
Authors: Tsunoda Kin-ichi , Ueno Hiroko , Akaiwa Hideo 
Published: March 2006

Abstract
An optical position sensor, which converts the shift of light beam center to voltage signal, was used to detect an analyte with a glass slab optical waveguide (SOWG) detector for flow analysis. The detector responded to mixtures of ethanol and water as well as methylene blue (MB) solutions, i.e., to change in the refractive index of the surface area of the SOWG. The detection limit of this system for MB solutions was half of that with the absorbance measurement using the SOWG.
A Slab Optical Waveguide with a Thin Glass Guiding Layer as an Absorption Detector in Flow Analysis
Authors: Tsunoda Kin-ichi , Itabashi Hiromitsu , Akaiwa Hideo 
Published: March 2006

Abstract
Developed was a slab optical waveguide (SOWG) in which thin sheet glass (20 to 200 μm thick) and a poly-tetrafluoroethylene-co-hexafluoropropylene film or air were used as a guiding layer and a clad, respectively. The sheet glass SOWG was evaluated as an absorption detector of flow analysis and gave higher sensitivity than a single-mode K+ doped glass SOWG and comparative sensitivity with a radio frequency sputtered glass SOWG. Thus, this sheet glass SOWG can also be applied to flow analysis as a sensitive absorption detector.
Hydrogen Production from Wet Cellulose by Low Temperature Gasification Using a Reduced Nickel Catalyst
Authors: Minowa Tomoaki , Ogi Tomoko , Yokoyama Shin-ya 
Published: March 2006

Abstract
Wet cellulose was gasified at 350 °C for 1 h in the presence of a reduced nickel catalyst under various operating pressures (8–18 MPa). Hydrogen was obtained specifically at high operating pressures of 17–18 MPa. Under the operating pressure of 18 MPa, the gas yield increased with catalyst loading and reached 91 wt% at the catalyst loading of 20 wt%. The gas consisted of hydrogen of 50 vol%, carbon dioxide of 40 vol% and methane of 10 vol%, which was equivalent to that the hydrogen of 70% in the cellulose was recovered as hydrogen gas.
Effect of Ring Distortion upon Redox Potentials of Metalloporphyrins: Electrochemical Studies of Metallododecaphenylporphyrins
Authors: Takeda Jun , Sato Mitsuo 
Published: March 2006

Abstract
Redox potentials of nonplanar metallododecaphenylporphyrins (MDPP) are determined by cyclic voltammetry. Oxidation processes of MDPP are selectively shifted to negative potentials in comparison with those of planar metalloporphyrins.
Complexation-induced Catalysis in Zinc Insertion into Cationic Porphyrin
Authors: Mizutani Tadashi , Koyama Hiroshi , Ema Tadashi , Nomura Akiko , Yoshida Takashi , Ogoshi Hisanobu 
Published: March 2006

Abstract
Insertion of zinc to a cationic porphyrin in water was accelerated by the addition of catechols and related compounds 2-5, while decelerated by the addition of pyridine derivatives 6-7. Complexes between zinc and 2-7 with different stoichiometric ratios showed different activity toward the zinc insertion reaction. The reaction becomes slower as the ionic strength is higher in the presence of tiron, indicating that electrostatic force plays an important role in the catalysis.
Photochemical Surface Modification of Poly(hexafluoropropylene-co-tetrafluoroethylene) (FEP) Film with Triethylamine
Authors: Ichinose Nobuyuki , Maruo Masaharu , Kawanishi Shunichi , Izumi Yoshinobu , Yamamoto Tadashi 
Published: March 2006

Abstract
Thin film of poly(hexafluoropropylene-co-tetrafluoroethylene) (FEP) reacted with triethylamine (TEA) upon UV irradiation to give hydrophilic and oleophilic surface through complicated defluorination reactions such as introduction of diethylaminoethyl group and formation of unsaturated bonds. Solvent and additive effects on the photoreaction strongly suggested the involvement of an electron transfer process from TEA to FEP.
Time-delayed, Two-color Excimer Laser Photolysis of 1,8-Bis(halomethyl)naphthalenes
Authors: Ouchi Akihiko , Yabe Akira 
Published: March 2006

Abstract
Time-delayed two-color photolysis of 1,8-bis(bromomethyl)naphthalene and l,8-bis(chloromethyl)naphthalene was conducted by successive irradiation of XeCl (308 nm) and XeF (351 nm) excimer lasers. Increase in the yield of the two-photon product, acenaphthene, strongly depended on the delay time of the two lasers and showed two maxima at the delay times of 0–30 ns and 0.2–0.5 μs.
Characterization of a Supersonic N2O Beam by Using a 2m-Electric Hexapole Field
Authors: Ohoyama Hiroshi , Tsuboi Shinji , Kasai Toshio 
Published: March 2006

Abstract
Characterization of supersonic N2O beam seeded in Ar was carried out by using a 2m-electric hexapole field. The rotational, translational and vibrational distributions were determined by the analysis of the focusing curves at various stagnation temperature. Inversion of the temperature between the rotation (5 K) and the translation (9 K) was revealed. Regardless of the stagnation temperature, the vibrational temperatures were found to be lower than the stagnation temperatures by ∼70 K, indicating the constant energy release in the bending mode of N2O.
Preparation and Properties of Hexamethylphosphoramide-Coordinated Complexes of Samarium(III) Iodide
Authors: Imamoto Tsuneo , Yamanoi Yoshinori , Tsuruta Hideyuki , Yamaguchi Kentaro , Yamazaki Mikio , Inanaga Junji 
Published: March 2006

Abstract
Samarium(III) iodide complexes with hexamethylphosphoramide ligand, [SmI3(hmpa)2(H2O)5]·2hmpa and SmI3(hmpa)3(H2O)4, have been isolated and structurally characterized by X-ray diffraction analyses. The dehydrated complex, SmI3(hmpa)4, was less reactive toward n-butyllithium or samarium metal than SmI3.
Iridium(I)-Catalyzed Asymmetric Hydrogenation of Prochiral Imines; Protic Amines as Catalyst Improvers
Authors: Tani Kazuhide , Onouchi Jun-ichiro , Yamagata Tsuneaki , Kataoka Yasutaka 
Published: March 2006

Abstract
A catalytic system, Ir(I)-BINAP-protic amine, was found to be effective for asymmetric hydrogenation of imines and the highest enantioselectivity of 90% ee has been attained for the hydrogenation of the cyclic imine, 2-phenyl-3,4,5,6-tetrahydropyridine.
New Entry to Chiral Base Catalyst. Asymmetric Michael Addition of α-Substituted β-Keto Esters to Methyl Vinyl Ketone Catalyzed by Podand-type Alkali Metal 2′-Substituted 1,1′-Binaphthalen-2-oxides
Authors: Tamai Yasufumi , Kamifuku Atsushi , Koshiishi Eiji , Miyano Sotaro 
Published: March 2006

Abstract
Asymmetric Michael reactions of α-substituted β-keto esters with methyl vinyl ketone catalyzed by 10 mol% of sodium 2′-[2-(2-methoxyethoxy)ethoxy]-1,1′-binaphthalen-2-oxide gave the optically active adducts quantitatively in up to 64% enantiomeric excess.
Decomposition of Geosmin in Aqueous Solution by Sonication
Authors: Yoo Youngeok , Takenaka Norimichi , Bandow Hiroshi , Nagata Yoshio , Maeda Yasuaki 
Published: March 2006

Abstract
Geosmin was decomposed by sonication in aqueous solutions saturated with various gaseous envelopes. The order of the decomposition rate of geosmin under the atmosphere was as follows ; argon &gt; oxygen ≥ air &gt; nitrogen.
An Effect of Anodic Reaction on the Current-Voltage Characteristics of Solid Oxide Fuel Cells
Authors: Eguchi Koichi , Kunisa Yasuhiro , Adachi Kentaro , Kayano Masashi , Sekizawa Koshi , Arai Hiromichi 
Published: March 2006

Abstract
The anodic concentration overvoltage was dominant in the low current density region when high concentration of CH4 or H2 was supplied to a Ni-YSZ anode of a solid oxide fuel cell. For a dilute fuel condition, the concentration overvoltage was small at low current densities, but a limiting current appeared due to depletion of fuel at high current densities. In extremely high PO2 region, the anodic polarization became large due to surface oxidation of Ni metal particles.
Neutral-Carrier-Type Ion-Sensing Membranes Based on Sol-Gel-Derived Glass
Authors: Kimura Keiichi , Sunagawa Takenobu , Yokoyama Masaaki 
Published: March 2006

Abstract
Typical neutral carriers, valinomycin and a bis(12-crown-4) derivative have been encapsulated in sol-gel-derived glasses to afford a novel type of ion-sensing membranes based on neutral carriers for ion-sensitive field-effect transistors (ISFETs). The neutral-carrier-based sol-gel-derived glass membranes, when incorporated in the ion sensors, showed high sensitivity, high selectivities, and fast potential response.
Stereodivergent Diels-Alder Reactions Employing Cyclitols as Chiral Auxiliaries
Authors: Akiyama Takahiko , Horiguchi Naofumi , Ida Tomoaki , Ozaki Shoichiro 
Published: March 2006

Abstract
The TiCl4 or SnCl4 mediated Diels-Alder reaction of cyclopentadiene and chiral acryloyl ester derived from chiral cyclitols proceeded with excellent diastereoselectivity in Et2O via re-face attack of the acrylates. In contrast, interesting changeover of the diastereofacial selectivity was observed by use of toluene or hexane as a solvent to afford the cycloadducts derived from si-face attack of the acrylates.
Microscopic Observation of Photocatalytic Reaction Using Microelectrode: Spatial Resolution for Reaction Products Distribution
Authors: Ikeda Katsuyoshi , Sakai Hideki , Baba Ryo , Hashimoto Kazuhito , Fujishima Akira 
Published: March 2006

Abstract
We employed a Pd-loaded TiO2 film as a simple model for the metal-deposited photocatalyst and carried out spatial mapping of reaction products formed by the photocatalytic reactions in a Fe(CN)63−⁄4− aqueous solution using a microelectrode. The experimental data were simulated with a diffusion model solved by the finite difference method. The results indicate that the spatial resolution of ca. 70 μm can be obtained with a distance of 30 μm between the sample surface and the microelectrode.
Synthesis, Characterization, and Reactivities of Heterobimetallic μ-Aryl Isocyanide Complexes with an Unusual Bridging Structure
Authors: Ishii Youichi , Kawaguchi Masayuki , Hidai Masanobu 
Published: March 2006

Abstract
Reaction of [NBu4][W(CN)(N2)(dppe)2] with [RuCp(η6-p-FC6H4R)][PF6] gave novel μ-aryl isocyanide complexes [WF{CN(η5-p-C6H4R)RuCp}(dppe)2] (3) through the arylation of the CN ligand concurrent with the loss of the dinitrogen ligand. The X-ray crystallographic study of 3a (R = H) revealed the unusual η1:η5-μ2-coordination of the phenyl isocyanide behaving as an iminocarbyne-cyclohexadienyl ligand.
Generation of α-Nitroalkyl Radicals by Oxidation of Nitronate Anions with Cerium(IV) Ammonium Nitrate and Their Addition Reaction to Electron-Rich Olefins
Authors: Arai Noriyoshi , Narasaka Koichi 
Published: March 2006

Abstract
α-Nitroalkyl radicals are generated by oxidation of nitronate anions with cerium(IV) ammonium nitrate. When the reactions are carried out in the presence of electron-rich olefins, such as silyl enol ethers, intermolecular addition of the radicals proceeds to afford β-nitroketones, which are further converted to α,β-unsaturated ketones in good yield.
Raman Spectroscopic Observations of Anomalous Conformational Behavior of Short Poly(oxyethylene) Chains in Water
Authors: Masatoki Sei , Takamura Motomu , Matsuura Hiroatsu , Kamogawa Keiji , Kitagawa Teizo 
Published: March 2006

Abstract
The Raman spectra of aqueous solutions of CH3(OCH2CH2)mOCH3 (m = 1−4) were measured for mole fractions down to 0.005. The spectral observation for the compounds with m ≥ 2 indicates that, on addition of water, the POE chain progressively prefers the gauche conformation for the OCH2–CH2O segment at the first stage, but this direction of the conformational preference is reversed for concentrations lower than a particular solution composition. This anomalous conformational behavior is suggestive of a new structural aspect of the POE–water system.
Synthesis and Properties of 1-(Tropon-2-yl)-1-aza-4,7,10,13-tetraoxacyclopentadecanes. Preferential Complexation of Lithium Salt among the Alkali Salts
Authors: Takeshita Hitoshi , Wang Qian Fan , Kubo Kanji , Mori Akira 
Published: March 2006

Abstract
1-(Tropon-2-yl)-1-aza-l5-crown-5 ether and 1-(7-bromotropon-2-yl)-1-aza-15-crown-5 ether were prepared by condensation of 1-aza-15-crown-5 ether and appropriate derivatives. Spectrophotometric titration of the 1:1-complexes of these crown derivatives showed a preferential complexation with lithium salt over other alkali metal salts. Thus, structural modification by capping with tropone system altered the selectivity.
Chiral Assembly of Porphyrins Regulated by Amphiphilic α-Helix Peptides
Authors: Mihara Hisakazu , Haruta Yasuaki , Sakamoto Seiji , Nishino Norikazu , Aoyagi Haruhiko 
Published: March 2006

Abstract
Amphiphilic α-helix peptides carrying porphyrin moieties were designed and synthesized. The tetraphenylporphyrins were able to be fixed and arranged with a chiral twist in a three-dimensional structure constructed by the amphiphilic assembly of the α-helices.
Synthesis of BEDT-BDTBS and Crystal Structures of Its Conducting Cation Radical Salts
Authors: Takahashi Kazuko , Ise Toshihiro , Mori Takehiko , Mori Hatsumi , Tanaka Shoji 
Published: March 2006

Abstract
1,3-Bis(4,5-ethylenedithio-1,3-dithiol-2-ylidene)-1,3-dihydrobenzo[c]selenophene (BEDT-BDTBS) has been synthesized by a convenient method and the electric properties and X-ray crystal structures of its single-crystalline cation radical salts have been clarified.
Substituent-Dependent Selective Replacement of Alkyne Moieties of Zirconacyclopentadienes via C-C Bond Cleavage Reaction
Authors: Hara Ryuichiro , Xi Zhenfeng , Kotora Martin , Xi Chanjuan , Takahashi Tamotsu 
Published: March 2006

Abstract
Replacement of an alkyne moiety of zirconacyclopentadienes via β,β′-carbon-carbon bond cleavage was highly dependent on their substituents. Complete differentiation between diphenylacetylene and 4-octyne in the reaction with butyronitrile was demonstrated.
Mediated Electrocatalytic Reduction of Nitrate and Nitrite Based on the Denitrifying Activity of Paracoccus denitrificans
Authors: Takayama Katsumi , Kano Kenji , Ikeda Tokuji 
Published: March 2006

Abstract
A carbon electrode modified with immobilized cells of Paracoccus denitrificans has been found to produce catalytic currents for the reduction of nitrate and nitrite in the presence of durohydroquinone. It has been shown that durohydroquinone functions as an electron transfer mediator between the electrode and the bacterial cells to drive electrochemically the denitrifying reaction of Paracoccus denitrificans.
Preparation and Crystal Structure of [Ni(H2tmtaa)][AlCl4]2: A Tetraazamacrocyclic Complex with Isolated Diimine Units in the Six-Membered Chelate Rings
Authors: Tsai Yaw-Huei , Lin Chu-Chieh 
Published: March 2006

Abstract
A nickel-tetraazamacrocyclic complex, Ni(H2tmtaa), with a novel structure was synthesized from the reaction of Ni(tmtaa) with 1,3-dibenzenedicarbonyl dichloride in the presence of AlCl3. The title compound losses proton readily in basic solution.
Hydrosilylation of Olefins with Monosilane in the Presence of Lithium Aluminum Hydride
Authors: Kobayashi Mineo , Itoh Masayoshi 
Published: March 2006

Abstract
Hydrosilylation reactions of 1-hexene and ethylene with SiH4 occurs in the presence of LiAlH4 as a catalyst. Hexylsilane and dihexylsilane were produced from 1-hexene and SiH4. Ethylsilane was produced from ethylene and SiH4. The reaction mechanism involving SiH4 and the alkyl anion, which is formed by the interaction between LiAlH4 and the olefin, has been proposed.
Intrapore Catalysis in NO Reduction with Methane on Ir/In/H-ZSM-5 Catalyst
Authors: Ogura Masaru , Kikuchi Eiichi 
Published: March 2006

Abstract
Chemisorption of NOx on In/H-ZSM-5, Ir/In/H-ZSM-5, and the physical mixture of Ir/H-ZSM-5 and In/H-ZSM-5, and the catalytic activities of these catalysts for NO reduction with methane are studied to understand the role of Ir onto In/H-ZSM-5. The amount of NOx chemisorption on Ir/In/H-ZSM-5 was largest among the catalysts tested. The catalytic activities for NOx reduction on these catalysts were well correlated to the amount of chemisorbed NOx. The dual-functional mechanism, that is, NO oxidation and NO2 reduction with CH4 works effectively on Ir and [InO]+ sites, respectively, in the same zeolite pore, as an intrapore catalysis.
Palladium-Catalyzed C-Allylation of Naphthols by Direct Use of Allylic Alcohols under Neutral Conditions
Authors: Tada Yuzuki , Satake Akiharu , Shimizu Isao , Yamamoto Akio 
Published: March 2006

Abstract
C-Allylation of 1- or 2-naphthols to give mono-, di-, and triallylnaphthols selectively using allylic alcohols directly under neutral conditions has been realized by employing palladium catalysts in the presence of molecular sieve 4A. This method is also applicable for the multiple allylation of 2,6-dihydroxynaphthalene.
Action Spectra of Non-Resonant Two-Photon (NRTP) Isomerization of α,ω-Diphenylpolyenes
Authors: Miyazawa Takashi , Liu Zhenlin , Liu Chengyou , Koshihara Shin-ya , Kira Mitsuo 
Published: March 2006

Abstract
The efficiency of the non-resonant two-photon (NRTP) isomerizations of stilbenes and 1,4-diphenyl-1,3-butadienes were found to depend strongly on the wavelength of the laser pulses. The results not only confirm the 21Ag nature of the excited states responsible for the cis-trans isomerizations but also demonstrate that the action spectra of the NRTP reactions correspond to the two-photon allowed absorption bannds.
Useful Synthesis of 2,3,6-Polythiazolesubstituted Pyridine Skeleton [Fragment A-C] of Peptide Antibiotic, Micrococcin P
Authors: Okumura Kazuo , Shigekuni Masashi , Nakamura Yutaka , Shin Chung-gi 
Published: March 2006

Abstract
Practical synthesis of 2,3,6-trithiazolesubstituted pyridine skeleton [Fragment A-C] of peptide antibiotic micrococcin P was achieved from 3-cyano-6-dimethoxymethyl-2-pyridone in twelve steps.
Partial Oxidation of Methane to Synthesis Gas with Iridium-loaded Titania Catalyst
Authors: Nakagawa Kiyoharu , Suzuki Toshimitsu , Kobayashi Tetsuhiko , Haruta Masatake 
Published: March 2006

Abstract
Ir(5 wt%) supported on TiO2 afforded a high activity for the partial oxidation of methane into CO and H2 with the selectivity of above 80% at 600 °C.
A Highly Sensitive Ammonia Gas Sensor Based on an Ag+/K+ Composite Ion Doped Glass Optical Waveguide System
Authors: Chen Xiao-Min , Itoh Kiminori , Murabayashi Masayuki , Igarashi Chiaki 
Published: March 2006

Abstract
A highly sensitive optical waveguide sensor was developed for gaseous ammonia detection. It was based on an Ag+/K+ composite ion doped glass optical waveguide (OWG). A thin sensing film, consisting of a polymer matrix and a dye, was coated onto the optical waveguide (OWG) surface. Its response was reversible and quick (&lt; 2.5 min), and detection limit was less than 100 ppb.
Metalloporphyrin as an Efficient Catalyst in the Regioselective Isomerization of Epoxides to Carbonyl Compounds
Authors: Takanami Toshikatsu , Hirabe Rina , Ueno Masayoshi , Hino Fumio , Suda Kohji 
Published: March 2006

Abstract
Regioselective ring-opening isomerization of epoxides to carbonyl compounds can effectively be catalyzed by iron (III) tetraphenylporphyrin, Fe(tpp)ClO4.
Tracer Diffusion of a Ligand-Stabilized Two-Shell Gold Cluster
Authors: Tominaga Toshihiro , Tenma Shoji , Watanabe Hiroshi , Giebel Ursula , Schmid Günter 
Published: March 2006

Abstract
Diffusion coefficients have been measured for the two-shell cluster of Au55(Hdpbs) 12Cl6 (Hdpbs = diphenylphosphino-benzene-3-sulfonic acid) in water at varying ionic strengths. Hydrodynamic radius of the particles are found to be 1.44 nm as calculated from the diffusion coefficient at sufficiently high ionic strengths. This is a little larger than the radius obtained from the AFM image. The diffusion coefficients decrease with decreasing ionic strength, indicating the electrostatic drag due to the ionic atmosphere.