bluuebunny/crossref_metadata_2025_split huggingface dataset:
Highly Fluorescent Naphthalimide Derivatives for Two-photon Absorption Materials
Authors: Li Jing , Meng Fanshun , Tian He , Mi Jun , Ji Wei 
Published: June 2005

Abstract
Novel multi-branched naphthalimide derivatives (TPA-NA1, TPA-NA2, and TPA-NA3) were synthesized by the Sonogashira reaction of N-butyl-4-bromo-1,8-naphthalimide with mono-, di-, and tri-ethynylated triphenylamine. The fluorescence increases with the increase of branch number and the quantum yield is as high as 0.87 for TPA-NA3 in toluene. Two-photon absorption cross sections of TPA-NA1, TPA-NA2, and TPA-NA3 were determined to be 0.42 × 10−20 cm4/GW, 1.4 × 10−20 cm4/GW and 1.0 × 10−20 cm4/GW (open aperture Z-scan, 120 fs, 780 nm), respectively.
New Approach for Preparation of Silver–Polystyrene Heterogeneous Nanocomposite by Polyol Process
Authors: Lee Jong-Min , Kim Dae-Wook , Lee Young-Ho , Oh Seong-Geun 
Published: June 2005

Abstract
Silver nanoparticles are homogeneously immobilized onto the polystyrene surface using polyol process for the first time. The formation mechanism of composite materials was discussed briefly. This novel method can be extended to the preparation of other metal–polymer nanocomposites.
A Facile Route to Fabricate Single-crystalline Antimony Nanotube Arrays
Authors: Li Liang , Xiao Yanhe , Yang Youwen , Huang Xiaohu , Li Guanghai , Zhang Lide 
Published: June 2005

Abstract
Single-crystalline antimony nanotube arrays are fabricated in the anodic alumina membranes using the pulsed electrodeposition technique for the first time. The thickness of Au layer sputtered on the anodic alumina membrane and the pulsed electrodeposition technique are two key factors to produce single-crystalline nanotubes.
A Highly Selective Fluorescent Chemosensor for Hg2+ in Aqueous Solution
Authors: Wang Lei , Wong Wai-kwok , Wu Lei , Li Zao-ying 
Published: June 2005

Abstract
A novel selective chemosensor (quinoxaline-bridged Schiff-base macrocycle) for mercury ion has been designed and synthesized, and it exhibited a remarkable selective fluorescent quench toward Hg2+ in the presence of other metal ions in aqueous solution.
Synthesis, Characterization, and Intramolecular Diels–Alder Reaction Tandem Dehydroaromatization of a Diene-diyne
Authors: Liu Shu-Zhi , Tang Guang-Shi , Wang Jing , Li Xue-Hua 
Published: June 2005

Abstract
5-(2-Methylthio-4-methyl-5-pyrimidinyl)-2,4-pentadiynyl sorbate 2 was synthesized and characterized. It had two conjugating systems, which made its 5J and 6J 1H–13C correlating signals be obtained in gHMBC spectra. Intramolecular Diels–Alder reaction tandem dehydroaromatization of diene-diyne 2 under heating and irradiating resulted in formation of benzolactone. The reaction underwent the two steps: thermochemistry and photochemistry. The intermediate was confirmed using C60 as an intermediate catcher. This reaction represents a rare example of intramolecular Diels–Alder reaction tandem dehydroaromatization of diene-diyne under mild conditions without catalyst and oxidant.
Selective Detection of the Solid-state NMR Signals from the Bacteriochlorophyll a Dimers in a Reconstituted Light-harvesting 1 Complex
Authors: Umetsu Mitsuo , Kadota Tomoyuki , Wang Zheng-Yu , Tanaka Yoshikazu , Adschiri Tadafumi , Nozawa Tsunenori 
Published: June 2005

Abstract
High resolution solid-state 13C NMR spectra have been obtained for bacteriochlorophyll (BChl) a in a light-harvesting (LH) 1 complex utilizing a reconstitution method. The LH 1 complexes were reconstituted with 13C-enriched BChl a and the apo-LH1 polypeptide from Rhodospirillum rubrum. Measurement of the 2-dimentional 13C–13C dipole correlation NMR spectra enabled the selective assignment of the 13C resonance from the BChl a molecules in the reconstituted LH1.
Synthesis of Novel Dimeric Steroidal-nucleoside Phosphoramidates
Authors: Ji Sanhao , Xiao Qiang , Ju Yong , Zhao Yufen 
Published: June 2005

Abstract
Some dimeric steroidal conjugated with 3′-azido-3′-deoxythymidine (AZT) as potential membrane-soluble prodrugs of the phosphate forms were synthesized in good yields and the structures were confirmed on the basis of 1H, 13C, and 31P NMR and ESI-MS.
A Novel Photodeposition Method in the Presence of Nitrate Ions for Loading of an Iridium Oxide Cocatalyst for Water Splitting
Authors: Iwase Akihide , Kato Hideki , Kudo Akihiko 
Published: June 2005

Abstract
IrO2 cocatalysts for water splitting were photodeposited from aqueous solution of (NH4)2[IrCl6] or Na3[IrCl6] in the presence of nitrate ions on La-doped NaTaO3 (denoted as NaTaO3:La) photocatalysts, while metallic iridium particles were deposited in the absence of nitrate ions. The IrO2-loaded NaTaO3:La showed the activity for water splitting 2.5 times higher than the nonloaded NaTaO3:La. In contrast, the steady activity was not obtained for the metallic iridium-loaded photocatalyst, because the back reaction quickly proceeded.
The Electroluminescence Spectrum of Chlorophyll a
Authors: Shimatani Kazuhiro , Tajima Hiroyuki , Komino Takeshi , Ikeda Shingo , Matsuda Masaki , Ando Yoriko , Akiyama Hidefumi 
Published: June 2005

Abstract
We fabricated organic-light-emitting diode (OLED) from chlorophyll a, and measured electroluminescence (EL) and photoluminescence (PL) spectra. The EL spectrum exhibits a peak at 700 nm and a shoulder at 750 nm, while the PL spectrum exhibits a peak at 750 nm. The external quantum efficiency of the fabricated OLED linearly increases for the applied voltage above V = 4 V and reaches to 9 × 10−8 at V = 8 V.
Structure of Bis(iodozincio)methane in THF Solution
Authors: Matsubara Seijiro , Oshima Koichiro , Matsuoka Hideki , Matsumoto Kozo , Ishikawa Kazuhiko , Matsubara Eiichiro 
Published: June 2005

Abstract
Bis(iodozincio)methane, which has been shown to be an efficient reagent for organic synthesis, is obtained as THF solution. The structural information about the reagent as THF solution was corrected by small angle neutron scattering and by anomalous X-ray scattering. Those scattering experiments implied that the prepared bis(iodozincio)methane exists without forming any oligomer or aggregate.
Steep Spin-crossover and LIESST Effect of a New Fe(II) Complex with a Tridentate Ligand Derived from 2-Phenyl-4-formylimidazole and N-Methylethylenediamine
Authors: Torigoe Haruna , Hagiwara Hiroaki , Arata Shinobu , Yamada Masahiro , Matsumoto Naohide 
Published: June 2005

Abstract
A novel FeII spin-crossover (SC) complex, [FeII(HL)2](ClO4)2, has been synthesized, where HL denotes tridentate N3 ligand N-methyl[2-[[(2-phenylimidazol-4-yl)methylidene]amino]ethyl]amine). The FeII complex showed a steep SC at T1/2 = 175 K without frozen-in effect and hysteresis. The crystal structures at the high-spin (HS) and low-spin (LS) states were determined. Though there is no intermolecular interaction and no frozen-in effect, LIESST (light-induced excited spin state trapping) and reverse-LIESST effects were observed.
Novel Carbon Molecular Sieve Membranes Derived from Poly(phenylene oxide) and Its Derivatives for Gas Separation
Authors: Yoshimune Miki , Fujiwara Ichiro , Suda Hiroyuki , Haraya Kenji 
Published: June 2005

Abstract
We succeeded in fabricating new carbon molecular sieve (CMS) membranes as hollow fibers using poly(phenylene oxide) (PPO) and its functionalized derivatives (R-PPO). Gas transport properties were measured for He, H2, CO2, O2, and N2. PPO CMS membranes exhibited higher performances than those of polymeric precursors. The highest performance was attained by trimethylsilyl-PPO (TMSPPO) CMS membrane pyrolyzed at 923 K, of which O2 permeability was 125 Barrer and O2/N2 permselectivity was 10.0 at 298 K.
Functional Group Transformations and Stereochemistry of Silicon-functionalized 7-Silabenzonorbornadienes
Authors: Kawachi Atsushi , Okimoto Masahiro , Yamamoto Yohsuke 
Published: June 2005

Abstract
Functional group transformations of 7-silabenzonorbornadiene derivatives have been investigated. The 7-mesityl-7-silanorbornadiene 1 was prepared and converted into the 7-chloro derivative 5. Reductive lithiation of 5 with lithium naphthalenide afforded the silyllithium 6, which reacted with Me3SiCl and MeI. The reactions of 5 with n-BuLi and PhNHLi gave the 7-butyl derivative 9 and the 7-amino derivative 10, respectively. Each stereochemistry during these transformations was determined by X-ray crystallographic analysis.
Low-temperature Synthesis of Crystalline TiO2 Nanorods: Mass Production Assisted by Surfactant
Authors: Yang Songwang , Gao Lian 
Published: June 2005

Abstract
Crystalline and dispersed rutile TiO2 nanorods with diameters of ≈6–8 nm and lengths of 40–100 nm were synthesized via a low-temperature solution process in the presence of nonionic surfactant P123.
A Bromine Adduct of 2,3,6,7,14,15-Hexamethyl-9,10-distibatriptycene. The First Stibonium–Stiborate Zwitterion
Authors: Uchiyama Yosuke , Yamamoto Gaku 
Published: June 2005

Abstract
2,3,6,7,14,15-Hexamethyl-9,10-distibatriptycene (3) reacted with bromine to give an adduct 4 with the composition of 3·2Br2. X-ray structure analysis and 1H NMR studies revealed that the bromine adduct 4 forms an intramolecular salt composed of a tetracoordinate bromostibonium ion moiety, R3SbBr+, and a hexacoordinate tribromostiborate ion moiety, R3SbBr3−, both in the crystalline state and in solution.
Large-scale, Solution-phase Production of Microsized, Single-crystalline, Hexagonal Gold Microplates by Thermal Reduction of HAuCl4 with Oxalic Acid
Authors: Sun Xuping , Dong Shaojun , Wang Erkang 
Published: June 2005

Abstract
Heating an aqueous oxalic acid/HAuCl4 solution results in the formation of microsized, single-crystalline, hexagonal gold microplates on a large scale.
Selective Conversion of Dimethyl Ether to Propylene and Light Olefins over Modified H-ZSM-5
Authors: Zhao Tian-Sheng , Takemoto Tomokazu , Yoneyama Yoshiharu , Tsubaki Noritatsu 
Published: June 2005

Abstract
Light olefins especially propylene was formed selectively with a propylene/ethylene ratio of 10, from direct conversion of dimethyl ether over ZrO2 and H3PO4-modified H-ZSM-5 catalyst at atmospheric pressure. The improved propylene selectivity was due to adjusted acid property and shape-selective microspores of the modified H-ZSM-5.
A Facile and One-pot Synthesis of High Aspect Ratio Anatase Nanorods Based on Aqueous Solution
Authors: Yang Songwang , Gao Lian 
Published: June 2005

Abstract
Single-crystalline anatase nanorods with high aspect ratios have been synthesized through a facile and one-pot method based on an aqueous solution. The synthesized anatase nanorods have pits, crevices, and dislocations on the surfaces besides the steps, kinks, and terraces on the side walls.
Pressure Effect on the Magnetic Phase Transition of Guest-tunable Weak Ferromagnets [Fe{N(CN)2}2(pyrimidine)](guest) (Guest = Ethanol and Pyrimidine)
Authors: Yuza Kenji , Ishida Takayuki , Nogami Takashi 
Published: June 2005

Abstract
The spontaneous magnetization of [Fe{N(CN)2}2(pm)](ethanol) (pm = pyrimidine) was suppressed under pressure up to 0.5 GPa and finally behaved as a paramagnet at 0.6 GPa. The loose packing of the host–guest complex structure seems responsible for the pressure-sensitive magnetism. On the other hand, [Fe{N(CN)2}2(pm)](pm) exhibited relatively small pressure dependence of the phase transition behavior.
Fabrication of 2D Ordered Porous ZnO Films Using 3D Opal Templates by Electrodeposition
Authors: Yan Hongwei , Yang Yingling , Fu Zhengping , Yang Beifang , Wang Zhen , Xia Linsheng , Yu Shijun , Fu Shengquan , Li Fanqing 
Published: June 2005

Abstract
The fabrication of two-dimensionally ordered porous zinc oxide films using three-dimensional colloidal crystal templates by electrodeposition is reported. The hydrophilicity of the substrate and the hydrophobicity of the template are utilized to control the generated structures.
Coupling of ICP-MS and Multitracer Technique as a New Method to Investigate Dynamics of Various Elements in Soil-water System
Authors: Mitsunobu Satoshi , Takahashi Yoshio , Hirunuma Rieko , Haba Hiromitsu , Enomoto Shuichi 
Published: June 2005

Abstract
Coupled application of multitracer method for the sorption experiments and ICP-MS for leaching experiments was proposed as a new method to study the dynamics of various elements in soil–water systems. This method enables us to obtain reversibility and the time required to attain the steady-state simultaneously for various elements in soil–water system. An example of the results obtained by this method was shown for the case of Co in this letter.
Fabrication of Hierarchical Zeolitic Material from Zeolite Nanoprecursors and Macromolecular Template
Authors: Naik Sajo P , Chiang Anthony S T , Sasakura Hideshi , Yamaguchi Yukio , Okubo Tatsuya 
Published: June 2005

Abstract
Hierarchical zeolitic material possessing three generations of micro-, meso-, and macroporosities was fabricated under controlled steaming at 145 °C through a dual-template approach using tetrapropylammonium hydroxide (TPAOH) and poly(methyl methacrylate) (PMMA) latex particles as micropore and macropore templates, respectively.
Micro-patterning of LiMn2O4 Electrode Using Sol–Gel Process for Lithium Micro-batteries
Authors: Dokko Kaoru , Sugaya Jun-ichi , Munakata Hirokazu , Kanamura Kiyoshi 
Published: June 2005

Abstract
Micro-dot array of LiMn2O4 on Au substrate was prepared by sol–gel process combined with a micro-injection technology. The size of a dot of LiMn2O4 was 50 μm, and dot population density on the substrate was 5000 dots cm−2. Electrochemical properties of micro-dots of LiMn2O4 in a PMMA-gel electrolyte were characterized as cathode for lithium micro-batteries. A micro-dot of LiMn2O4 exhibited a discharge capacity of 1.8 μC dot−1, and the capacity fade was only 21% over 200 charge–discharge cycles.
Synthesis of β-MoO3 by Simple Evaporation of Molybdic Acid Solution Containing Nitric Acid
Authors: Mizushima Takanori , Fukushima Kazuya , Huong Tran Mai , Ohkita Hironobu , Kakuta Noriyoshi 
Published: June 2005

Abstract
β-MoO3 was successfully synthesized through a simple evaporation of a molybdic acid solution prepared by a cation exchange of an aqueous solution of Na2MoO4·2H2O. The key was an addition of a small amount of nitric acid before the evaporation. Heating the dried molybdic acid at 573 K in oxygen resulted in a formation of a bright yellow powder, which was confirmed to be β-MoO3 free from α-MoO3 by XRD and Raman spectroscopy.
Experience with radiofrequency closure of varicose veins (VNUS)
Authors: Das S K , Sahoo N , Shanaz M 
Published: June 2005

Objective: The aim of this study was to reproduce the results of VNUS closure in our setting; to minimize the cost associated with the procedure; and to reduce the need for an experienced ultrasonographer during the procedure. Methods: Over a two-year period, 26 patients (42 limbs) were treated. A VNUS radio-frequency machine was used and assisted by intraoperative localization using Sonosite ultrasound, which was operated by the surgeon. All patients were treated under general anaesthetic. Nine patients were operated as a day case and 17 others stayed overnight. Median follow-up period was seven months. Results: The mean age of the patients was 37 years (range 19–69). Eighteen patients had primary and eight had recurrent varicose veins. Sixteen patients underwent bilateral and 10 underwent the unilateral procedure. Long saphenous vein (LSV) closure was performed in 41 limbs and short saphenous vein closure in two limbs. The LSV was accessed at the ankle in 36 and at knee in three limbs. In two other limbs, groin exploration with retrograde closure of the LSV was achieved. One patient developed numbness at phlebectomy site. None of the patients had deep vein thrombosis and all the treated veins were closed at the one-week scan. In bilateral cases, one catheter was used instead of two for closure in 12 of the 16 limbs. Using our approach, we were able to make a cost savings of £8,600.00. Conclusion: Technical success in radiofrequency vein closure can be achieved without the need for an additional ultrasonographer. We have shown that our approach is safe, effective and less expensive to deliver.
The outcome of recurrent varicose vein surgery: the patients' perspective
Authors: Edwards A G , Donaldson O , Bennetts C , Mitchell D C 
Published: June 2005

Objectives: This study was performed to assess the patient's perception of the outcome of recurrent varicose vein surgery. Methods: Patients who underwent surgery for recurrent varicose veins between 1 January 1995 and 31 December 1998 were sent a questionnaire and Aberdeen Varicose Vein Severity Score (AVVSS) in September 2003. Results: A total of 48 questionnaires were distributed and 40 responses (83%) were received. The mean length of follow-up was 81.78 months. Outcome was 'excellent' (no varicose veins) for four patients, 'satisfactory' for 22 (small, asymptomatic recurrence), 'unsatisfactory' for 10 (symptomatic recurrence) and 'worse' for four patients; 65% thought that the outcome was successful (excellent or satisfactory) and 35% a failure. The median AVVSS in the success group was 11.50 (IQR 7.94–19.69) compared with 29.63 (IQR 18.46–40.31) in the failure group ( P = 0.0009, Wilcoxon). Conclusions: Two-thirds of patients undergoing surgery for recurrent varicose veins are satisfied with the outcome, nearly seven years after surgery. One-third will regard surgery as having failed. Patients should be advised of these potential outcomes prior to surgery.
Effect of leg elevation on healing, venous velocity and ambulatory venous pressure in venous ulceration
Authors: Dix F P , Reilly B , David M C , Simon D , Dowding E , Ivers L , Bhowmick A , McCollum C N 
Published: June 2005

Objective: Current treatment of venous leg ulcers (VLU) includes four-layer bandaging, appropriate superficial venous surgery and leg elevation. The aims of this study were to: investigate a device designed to measure leg elevation; assess how long patients elevate; and to assess the effect of elevation on ulcer healing, femoral vein velocity (FVV) and popliteal vein cross-sectional area (PVCSA), and venous pressure. Patients and methods: A datalogger and accelerometer were manufactured to measure leg elevation. The device was validated in eight control subjects; elevation was measured in 24 patients with VLU. Ulcers were traced over six weeks in 29 patients and elevation measured to correlate healing with elevation. Ten patients and 10 controls underwent duplex measurement of FVV and PVCSA to measure flow in relation to posture; nine patients underwent measurement of venous pressure with postural changes. Non-parametric statistical analysis was used. Results: The datalogger accurately recorded all episodes of elevation. Median (range) elevation time was 53 (0–350) mins/24 h; correlation between ulcer healing and elevation was poor at 0.103 ( P=0.616, Spearman); change in posture from sitting to supine produced a significant increase in median (range) FVV from 11 (7–24) to 34 (22–66) in VLU ( P=0.005) and 15 (12–34) to 38 (16–69) in controls ( P=0.005, Wilcoxon). Change in posture from supine to 25 degrees elevation produced no change in FVV in either group ( P=0.173 in VLU, P=0.327 in controls, Wilcoxon). In VLU, sitting PVCSA was 1.07 (0.51–1.45) cm2. Supine position significantly reduced the area to 0.46 (0.27–1.01) cm2 ( P=0.005, Wilcoxon). On elevation to 25°, PVCSA was further reduced to 0.28 (0.07–0.63) cm2 ( P=0.058, Wilcoxon). In controls, sitting PVCSA was 0.79 (0.31–1.56) cm2, supine was reduced to 0.46 (0.27–1.09) cm2 ( P=0.047, Wilcoxon) and on elevation was reduced to 0.23 (0.10–0.44) cm2 ( P=0.005, Wilcoxon). Venous pressure standing was 99 (73–116) mmHg, reduced to 76 (53–113) mmHg on sitting ( P=0.084), and further reduced to 23 (7–36) mmHg supine ( P=0.008, Wilcoxon). Conclusions: Leg elevation in patients with VLU is poor but can be accurately measured. Elevation in the presence of compression may not improve ulcer healing. Postural changes of the leg can produce an increase in deep venous flow and a reduction in venous pressure.
Management of venous malformations in Klippel–Trenaunay syndrome with ultrasound-guided foam sclerotherapy
Authors: McDonagh B , Sorenson S , Cohen A , Eaton T , Huntley D E , La Baer S , Campbell K , Guptan R C 
Published: June 2005

Objective: To study the clinical profile of Klippel–Trenaunay syndrome (KTS) and the management of venous malformations (VMs) with ultrasound-guided foam sclerotherapy using the compass technique. Methods: In this open prospective series, 11 consecutive patients with KTS seeking therapy at a phlebology group practice were included. Seven (64%) of them were post-surgical recurrences. Results: Pain was the commonest presenting complaint (100%), accompanied with VMs/ varicose veins in all except one (91%). Chronic venous insufficiency (CVI) was seen in seven (64%). Soft tissue and bone deformity was present in all (100%). Limb lengthening was frequent and detected in eight (73%), thickening in six (54%); unusually, one patient (9%) presented with severe thinning and shortening of the leg. Venous malformation was the primary vascular problem in nine patients (82%), with capillary malformation (CM)/port wine stain in seven (64%) and isolated lymphatic malformation (LM) in two (18%). The lateral embryonic/Klippel–Trenaunay (KT) vein was detected in 10 patients (91%). Deep vein deformity was not detected in any of them. All the deformities were of the lower limb (100%), while two (18%) had deformities of the thorax and one (9%) had gastrointestinal (GI) malformation. None of the patients gave family history of KTS, while five (45%) had history of varicosities in the family. Eight patients (73%) completed the therapeutic plan with a mean follow-up of 5±3.9 years. An excellent to good type result could be documented in six of the eight cases (75%). These patients had an event-free, good quality of life. Follow-up duplex studies revealed the evolving refluxing tracts requiring sequential therapies. Conclusions: The results in this series demonstrate the utility of foam sclerotherapy using the compass technique in the management of KTS. Chronicity of the VMs in KTS necessitates strict clinical monitoring and sequential therapies.
Objective non-invasive technique for quantification of superficial varicose veins
Authors: de Zeeuw R , Noordmans H J , Verdaasdonk R M , Wittens C H A 
Published: June 2005

Introduction: Non-invasive methods for imaging varicose veins allow quantification and evaluation of venous diseases. This paper will describe a technique to visualize superficial (subdermal) varicose veins using digital infrared imaging and analysis with special software. Method: After image acquisition, the pictures were analysed with special software that segmented the varicose veins and calculated the surface area (per gridblock) occupied by varicose veins. By comparing the surfaces occupied by varices before and after a specific treatment, one can establish which treatment method performs the best. Aim for the future: Validation of this technique and quantification of the effects of treatment modalities for superficial (subdermal) varicose veins. We also investigate the use of this technique for the other clinical CEAP stages and the potential resemblance with duplex scanning.