Materials Literature
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An isothermal titration calorimetric study of the binding of substrates and inhibitors to different complexes of tartrate dehydrogenase (TDH) from Pseudomonas putida was carried out. TDH catalyzes the nicotinamide adenine dinucleotide (NAD)-dependent oxidative decarboxylation of d-malate and has an absolute requiremen…
Neutron diffraction measurements on a powder sample of α-Tb 2 S 3 were performed. This material consists of a stacking of square lattice Tb1 and triangular lattice Tb2 planes and exhibits two magnetic phase transitions at ∼3.5 and ∼12 K. It was found that the Tb1 and Tb2 moments behave quite independently. The Tb1 mom…
Recent developments in fullerenes, nanotubes, nanodiamond, and carbon fibers are reviewed.Contributions by different authors are grouped into three sections on the synthesis, chemistry and physics, and device applications of these carbon nanomaterials.As well as covering the materials chemistry from the fundamental an…
A detailed understanding of the electronic structures of transition metal bis(dithiolene) centers is important in the context of their interesting redox, magnetic, and optical properties. The electronic structures of the series [M(mnt)2]n- (M = Fe - Zn; mnt = 1,2-S2C2(CN)2; n = 1, 2) were examined by a combination of…
Five Cu(I) complexes [Cu2(ttab)(CH3CN)2][BF4]2 (1), [Cu(2)(ttab)(PPh3)2][BF4]2 (2), [Cu2(ttab)I2] (3), [Cu2(ttab)(I3)2] (4), and [Cu2(ttab)(I)BF4]n (5) with 1,2,4,5-tetra(7-azaindolyl)benzene (ttab) have been synthesized and characterized. The structures of compound 1, 2, 4, and 5 have been determined by single-crysta…
We have studied by inelastic x-ray scattering, at wave vectors 1 nm < or =q< or =15 nm(-1), the high-frequency dynamics of epoxy-amine mixtures as the monomers irreversibly polymerize. We find that chemical bonding, while inducing molecular ordering on a mesoscopic length scale, also efficiently realizes the mechanism…
Time-resolved small-angle x-ray scattering measurements reveal that a long-lived intermediate bcc state forms when a poly(styrene-b-isoprene) diblock copolymer solution in an isoprene selective solvent is rapidly cooled from the disordered micellar fluid at high temperature to an equilibrium fcc state. The kinetics of…
Abstract Nanosized ZnS has been synthesized in the interlayer galleries of Mg–Al layered double hydroxides (LDHs) by a process involving ion exchange of a Mg 2 Al‐NO 3 LDH precursor with a zinc–citrate complex {Na 2 [Zn(C 6 H 4 O 7 )] · 3 H 2 O} followed by reaction between the intercalated [Zn(C 6 H 4 O 7 )] 2– anion…
Methanol is used in the industrial crystallization of l -serine to reduce solubility and thereby to enhance the recovery from aqueous solutions in which l -serine has been synthesized. Earlier research had shown that the crystal form obtained from such solutions can be either the anhydrous or the monohydrate form of l…
The photoluminescence from functionalized single-walled carbon nanotubes was found to be highly sensitive to the presence of nitroaromatic compounds such as nitrobenzene, 4-nitrotoluene, and 2,4-dinitrotoluene. The strong luminescence quenching in solution was at the upper limit of diffusion-control and also showed si…
Evolutionary engineered polyhydroxyalkanoate (PHA) synthases from Pseudomonas sp. 61-3 enhance PHA accumulation and enable the monomer composition of PHAs to be regulated. We characterized a newly screened Ser477Arg (S477R) mutant of PHA synthase by in vivo analyses of P(3-hydroxybutyrate) [P(3HB)] homopolymer and P(3…
We report a simple and direct synthetic method for the preparation of nanoporous carbon nanotubes with larger pores (>10 nm) on the tube wall. The method combines the use of anodic aluminum oxide (AAO) as a template for the tube diameter and block copolymer/carbohydrates self-assembly within thin films confined inside…
When a liquid droplet experiences a temperature inhomogeneity along its bounding surface, a surface energy gradient is engendered, which when, in a continuous sense, exceeding a threshold, results in a convective flow dissipating the energy. If the associated temperature gradients are sustained by the interface betwee…
Mesoporous silica materials (HS-JLU-20) with an extremely high content of mercaptopropyl groups have been successfully synthesized using fluorocarbon-hydrocarbon surfactant mixtures through a simple co-condensation approach of tetraethyl orthosilicate (TEOS) and (3-mercaptopropyl)trimethoxysilane (MPTS), which are cha…
Recent developments in fullerenes, nanotubes, nanodiamond, and carbon fibers are reviewed.Contributions by different authors are grouped into three sections on the synthesis, chemistry and physics, and device applications of these carbon nanomaterials.As well as covering the materials chemistry from the fundamental an…
The formation of shaped silicas directed by a star poly(ethyleneimine) ( sPEI4 − 200, with benzene core, four arms, and 200 repeated units per arm) was reported. The resulting silicas were characterized with scanning electronic microscope, optical/fluorescence microscope, and UV−vis and fluorescence spectrometers. We…
The elastic tensor of monocrystalline ${\mathrm{ZrW}}_{2}{\mathrm{O}}_{8}$ was determined near $300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ as a function of pressure, using pulse-echo ultrasound in a large-volume moissanite anvil cell. An unusual decrease in bulk modulus with increased pressure was observed. A framework…
A study involving a large number of carbon nanotube transistors reveals that the nanotube diameter and the metal contact material play key roles in determining the on- and off-state currents of these devices. The results are discussed in terms of the Schottky barrier at the metal-semiconductor junction and the variati…
Ion-exchange in surface-initiated polyelectrolyte brushes provides a versatile route to the formation of catalytically active surfaces for electroless deposition of Cu. The advantage of this procedure is the covalent anchoring of the catalyst support layer, eliminating delamination of the metal film, even when deposit…
A triad D-Ir-A, where Ir is an Ir(III) bisterpyridine complex connected through an amidophenyl spacer to D, a triphenylamine electron donor, and to A, a naphthalene bisimide electron acceptor, has been synthesized and electrochemically investigated. The photoinduced processes in the triad, which is more than 4-nm long…