James K. McCusker、Arnold L. Rheingold、David N. Hendrickson1996-01-01Inorganic Chemistry
Results are presented from a variable-temperature solution-phase laser photolysis study of the 5 T 2 → 1 A 1 intersystem crossing in a series of related complexes: [Fe(tpen)](ClO 4 ) 2, [Fe(tppn)](ClO 4 ) 2, [Fe(tptn)](ClO 4 ) 2, [Fe( t -tpchxn)](ClO 4 ) 2, and [Fe(dpa) 2 ](ClO 4 ) 2 . The hexadentate ligands are form…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
D. R. Iyengar、S. Perutz、Chi‐An Dai 等 5 位作者1996-01-01Macromolecules
A diblock copolymer of deuterated styrene and isoprene (dPS−PI) with a small volume fraction of isoprene was chemically modified to incorporate pendant fluorinated side chains (“fingers”). The composition distribution of the diblock copolymers within a high molecular weight polystyrene (PS) homopolymer was determined…
Surface Modification and SuperhydrophobicityBlock Copolymer Self-AssemblyAdhesion, Friction, and Surface Interactions
Temer S. Ahmadi、Zhiling Wang、A. Henglein 等 4 位作者1996-01-01Chemistry of Materials
Cubic platinum nanoparticles (4−18 nm) have been synthesized for the first time in solution by the controlled reduction of K2PtCl4 with hydrogen gas in the presence of sodium polyacrylate as a capping material. The nanoparticles are found to have fcc structures, similar to the bulk metal with {100} facets.
Gold and Silver Nanoparticles Synthesis and ApplicationsCatalytic Processes in Materials Sciencenanoparticles nucleation surface interactions
James H. Clark、Duncan J. Macquarrie1996-01-01Chemical Society Reviews
J. H. Clark and D. J. Macquarrie, Chem. Soc. Rev., 1996, 25, 303 DOI: 10.1039/CS9962500303
Mesoporous Materials and CatalysisCatalysis for Biomass ConversionCatalysis and Hydrodesulfurization Studies
Claude Piguet、Jean‐Claude G. Bünzli、Gérald Bernardinelli 等 6 位作者1996-01-01Journal of the American Chemical Society
The segmental ligand 2-{6-[ N, N -diethylcarbamoyl]pyridin-2-yl}-1,1‘-dimethyl-5,5‘-methylene-2‘-(5-methylpyridin-2-yl)bis[1 H -benzimidazole] (L 2 ) reacts with stoichiometric amounts of Ln(III) (Ln = La−Nd, Sm−Tb, Tm−Lu, Y) and Zn(II) in acetonitrile to yield quantitatively and selectively the heterodinuclear triple…
Advanced MRI Techniques and ApplicationsMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Ping Zhao1996-01-01Journal of the Chemical Society Faraday Transactions
Emeraldine refers to the semi-oxidized state of polyaniline and it can exist in the base form or the protonated form (salt) generated by treatment of the base form with an acid. Using a newly applied doping system NaReO4/HReO4, the investigation of the base–acid transition process of emeraldine has been carried out by…
Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors
María D. Alba、Zhaohua Luan、Jacek Klinowski1996-01-01The Journal of Physical Chemistry
The location and coordination of titanium in the titanosilicate mesoporous molecular sieve MCM-41 prepared from Ti(IV) ethoxide as the source of titanium was studied by XRD, IR spectroscopy, 29 Si MAS NMR, and XANES. The results are interpreted on the basis of isomorphous substitution of Ti for Si. XANES shows that ti…
Catalytic Processes in Materials ScienceZeolite Catalysis and SynthesisMesoporous Materials and Catalysis
Steven W. Taylor、D. Bruce Chase、M H Emptage 等 5 位作者1996-01-01Inorganic Chemistry
Iron(III) binding to the DOPA-containing Mytilus edulis adhesive protein (Mefp1) has been studied by spectrophotometric titrations, electron paramagnetic resonance (EPR), and resonance Raman spectroscopies. At pH 7.0, two different forms of the iron−protein complex exist: one purple (λ max = 548 nm) and one pink (λ ma…
Polymer Surface Interaction StudiesEnzyme Structure and FunctionHemoglobin structure and function
Josè L. Espartero、Iliya Rashkov、Suming Li 等 5 位作者1996-01-01Macromolecules
1 H and 13 C NMR analyses of l - and d . l -lactic acid oligomers were found considerably improved by recording spectra in DMSO- d 6 instead of CDCl 3 . Systematic comparison of oligomer spectra led to the identification of a neighboring effect which was shown to be linearly additive. Assignment of all the 13 C NMR ch…
Drug Solubulity and Delivery Systemsbiodegradable polymer synthesis and propertiesBiopolymer Synthesis and Applications
Christian C. Honeker、Edwin L. Thomas1996-01-01Chemistry of Materials
In contrast to other types of segmented multiblock thermoplastic elastomers, simple ABA block copolymers represent a class of well-defined nanostructured materials. Due to the inherent block lengths built in during the polymerization, the microdomain structure of block copolymers exhibits a size scale of typically 10−…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesBlock Copolymer Self-Assembly
Richard A. Bley、Susan M. Kauzlarich1996-01-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA Low-Temperature Solution Phase Route for the Synthesis of Silicon NanoclustersRichard A. Bley and Susan M. KauzlarichView Author Information Department of Chemistry University of California Davis, California 95616 Cite this: J. Am. Chem. Soc. 1996, 118, 49, 12461–124…
Carbon Nanotubes in CompositesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
Maurizio Bellotto、B. Rebours、O. Clause 等 6 位作者1996-01-01The Journal of Physical Chemistry
The structure of the phases obtained upon dehydration and decomposition of hydrotalcite-like compounds is investigated by several experimental techniques. A reaction mechanism is proposed encompassing a change in coordination of the M(III) cations during the dehydration step. The formation of a 3-dimensional structure…
Layered Double Hydroxides Synthesis and ApplicationsInorganic Chemistry and MaterialsThermal Expansion and Ionic Conductivity
Donald T. Morelli、Andrew M. Mance、J. V. Mantese 等 4 位作者1996-01-01Journal of Applied Physics
LaMnO3 films doped with Ca, Ba, or Sr have been fabricated using the metalorganic decomposition technique. These films exhibit paramagnetic-to-ferromagnetic phase transitions at 250, 300, and 350 K, respectively. By measuring the film magnetization as a function of field and temperature we have determined the entropy…
Magnetic and transport properties of perovskites and related materialsShape Memory Alloy TransformationsAdvanced Condensed Matter Physics
Guy Louarn、Miroslaw Trznadel、J.P. Buisson 等 7 位作者1996-01-01The Journal of Physical Chemistry
Raman spectra of neutral and electrochemically doped regioregular poly(3-decylthiophene) were studied using different excitation lines, namely, 457.9, 514.5, 676, and 1064 nm. Contrary to the case of nonregioregular poly(3-decylthiophene) obtained by polymerization with FeCl 3, in regioregular polymer the position of…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsElectrochemical Analysis and Applications
Hisashi Tamai、Takuhiro Kakii、Yoshifumi Hirota 等 5 位作者1996-01-01Chemistry of Materials
The steam invigoration of pitches (softening points 85 and 280 °C) homogenized with 1−3 wt % of organo rare-earth metal complexes such as Ln(C 5 H 5 ) 3 or Ln(acac) (Ln = Y, Yb) at 930 °C provided activated carbons with an extremely high mesopore ratio, >70%. The resulted activated carbon selectively adsorbs giant mol…
Polymer Nanocomposites and PropertiesMesoporous Materials and CatalysisSynthesis and properties of polymers
Renée T. MacDonald、Stephen P. McCarthy、Richard A. Gross1996-01-01Macromolecules
Polylactide (PLA) stereocopolymers with ( l ) repeat unit contents of 75%, 80%, 82%, 85%, 90%, 91%, 92%, 94%, and 95% were prepared from mixtures of ( l )-/( d )-lactide and ( l )-/ meso -lactide. Compression molding of these products gave amorphous films which, for ( l ) contents ≥90%, were also annealed above T g to…
Bone Tissue Engineering Materialsbiodegradable polymer synthesis and propertiesMicroplastics and Plastic Pollution
Jarosław Drelich、James L. Wilbur、Jan D. Miller 等 4 位作者1996-01-01Langmuir
Model heterogeneous surfaces consisting of alternating and parallel 2.55 μm hydrophobic and 2.45 μm hydrophilic strips were prepared on a gold film by patterning self-assembled monolayers of hexadecanethiol and mercaptohexadecanoic acid using an elastomer stamp. The advancing and receding contact angles were measured…
Surface Modification and SuperhydrophobicityAdhesion, Friction, and Surface InteractionsElectrowetting and Microfluidic Technologies
Jean‐Pierre Costes、Françoise Dahan、Arnaud Dupuis 等 4 位作者1996-01-01Inorganic Chemistry
The LCuGd(NO3)3·Me2CO complex crystallizes in the monoclinic space group P21/c (No. 14) in a cell having the dimensions a = 9.799(1) Å, b = 18.926(3) Å, c = 16.012(1) Å, β = 96.530(8)°, Z = 4. The four units forming the unit cell do not display any obvious short contacts between them. The magnetic behavior is characte…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesOrganic and Molecular Conductors Research
Viveka Alfredsson、Michael W. Anderson1996-01-01Chemistry of Materials
A model of the cubic mesoporous silicate MCM-48, based on the gyroid minimal surface, has been generated by computer simulation. Transmission electron micrographs and X-ray diffraction (XRD) patterns have been recorded for MCM-48 and compared with the images and XRD patterns obtained by modeling. The gyroid minimal su…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisAerogels and thermal insulation
Ahmed Badri、Claude Binet、Jean‐Claude Lavalley1996-01-01Journal of the Chemical Society Faraday Transactions
Two ceria samples with differing specific surface areas and porosities have been investigated by IR spectroscopy. A ν(OH) band at ca. 3510 cm–1 was found to be due to cerium oxyhydroxide impurities within the ceria pores. One-, two- and three-coordinated OH species were observed. Doubly bridging OH species in the vici…
Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions