Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGold-Based Therapeutic AgentsC. Frank ShawView Author Information The Department of Chemistry, Eastern Kentucky University, Richmond, Kentucky 40475-3124, and The Department of Chemistry, University of WisconsinMilwaukee, Milwaukee, Wisconsin 53201-0413 Cite this: Chem. Rev.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGadolinium(III) Chelates as MRI Contrast Agents: Structure, Dynamics, and ApplicationsPeter Caravan, Jeffrey J. Ellison, Thomas J. McMurry, and Randall B. LaufferView Author Information EPIX Medical, Inc., 71 Rogers Street, Cambridge, Massachusetts 02142 Cite this: Chem. Rev…
ABSTRACT This chapter presents an introduction to ionic-polymer-metal composites and some mathematical modeling pertaining to them. It further discusses a number of recent findings in connection with ion-exchange polymer metal composites (IPMC) as biomimetic sensors and actuators. Strips of these composites can underg…
We investigate the phase diagram and the segregation kinetics of a system of particles with three-body interactions on a two-dimensional square lattice. We compare this with the usual case of pair interactions which have particle-hole symmetry. Our simulations suggest that the kinetics belong to the same universality…
Haloalkane dehalogenase (DhlA) converts haloalkanes to their corresponding alcohols and halide ions. The rate-limiting step in the reaction of DhlA is the release of the halide ion. The kinetics of halide release have been analyzed by measuring halide binding with stopped-flow fluorescence experiments. At high halide…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTExceptional Triplet and Quartet States in Highly Charged HexabenzocoronenesLileta Gherghel, Johann Diedrich Brand, Martin Baumgarten, and Klaus MüllenView Author Information Max-Planck-Institute for Polymer Research Ackermannweg 10, 55128 Mainz P.O. Box 3148, D-55021 M…
A method for the synthesis of well-defined mono-, di-, and mixed-telechelic polyphosphazenes produced via a living cationic polymerization of phosphoranimines is described. Amino phosphoranimines R−NH(CF 3 CH 2 O) 2 P NSiMe 3 (R = Ph−, p -BrPh−, p -H 3 CPh−, CH 2 CHCH 2 −, and CH 2 CHPh−) were synthesized via a reacti…
The crystal and magnetic structures of the 1:1 salts of [M(dmit) 2 ] - (M = Ni and Au) with the p -EPYNN ( p - N -ethylpyridinium α-nitronyl nitroxide) cationic radical have been studied. Both crystals contain one-dimensional p -EPYNN chains with alternate head-to-tail orientation. In this chain a ferromagnetic intera…
Three new complexes involving nitronyl nitroxide and PhCOO - or N 3 - ligands have been synthesized and structurally and magnetically characterized. These compounds are formulated as Mn(L) 4 (X) 2 · n H 2 O, L = 2-( p -pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (PNN) or 2-( p -pyridyl)-4,4,5,5-tetramethyli…
Europium ions were used as fluorescent probes for examining the interaction of polyanionic hydrogels of chemically cross-linked poly(acrylic acid) and poly(methacrylic acid) with multivalent cations in aqueous medium. The fluorescence data indicate a strong and asymmetric binding of carboxylate groups to Eu 3+ ions, l…
The synthesis of A 2 B 2 heteroarm stars, where A is polyisoprene (PI) and B is poly(methyl methacrylate) (PMMA) has been achieved using living anionic polymerization. A divinyl coupling agent 1,1-(1,2-ethandiyl)bis(4-(1-phenylethenyl)benzene) (EPEB) was used to link together polyisoprenyllithium chains and create a d…
A small-angle neutron scattering (SANS) investigation of matrix chain deformation in an especially designed composite model system for a filled rubber−elastic network is presented. SANS experiments on the structure of polyisoprene homopolymer chains introduced into a well-microphase-separated triblock polyisoprene−pol…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTAssembly of Dynamic Heterometallic Oligoporphyrins Using Cooperative Zinc−Nitrogen, Ruthenium−Nitrogen, and Tin−Oxygen CoordinationHee-Joon Kim, Nick Bampos, and Jeremy K. M. SandersView Author Information University Chemical Laboratory, Lensfield Road, Cambridge CB2 1…
A high dimensional model representation (HDMR) technique is introduced to capture the input−output behavior of chemical kinetic models. The HDMR expresses the output chemical species concentrations as a rapidly convergent hierarchical correlated function expansion in the input variables. In this paper, the input varia…
Nanotube rings were fabricated from straight single-wall carbon nanotubes (SWNTs) with yields exceeding 50%. The rings result from the folding of nanotubes onto themselves under ultrasonic irradiation to form coils with a narrow distribution of radii (300−400 nm). A simple continuum elastic model is used to discuss th…
We have shown experimentally that an electric field decreases the energy separation between the two components of a dense spin-polarized exciton gas in a coupled double quantum well, from a maximum splitting of $\sim 4$ meV to zero, at a field of $\sim $35 kV/cm. This decrease, due to the field-induced deformation of…
The chiral structure of liquid crystalline phases arises due to the intrinsic chirality of the constituent mesogens. While it is seemingly straightforward to quantify the macroscopic chirality by using, for instance, the cholesteric pitch or the optical rotatory power, it is not as simple to quantify the chirality of…
A phosphorus(V) complex of tetra-tert-butylphthalocyanine was prepared. The blue complex showed B and Q bands at 350 and 660 nm with a fluorescence peak at 680 nm in chloroform. In a CV, the complex showed three oxidative and three reductive waves. The following depicted here was tentatively proposed.
The adsorption of H or F species on B vs N atoms on the h-BN (001) surface has been investigated theoretically within the DFT method, using a cluster approach. Only the boron atoms were subjected to a local transformation from hexagonal to cubic phase. It occurred either upon the adsorption of F species or the adsorpt…
The application of surface plasmon resonance (SPR) measurements to the study of ultrathin organic films adsorbed onto gold surfaces utilizing near-infrared (NIR) excitation from a Fourier transform (FT) spectrometer is described. The FT-SPR experiment measures the NIR reflectivity spectrum from a prism/gold film/water…