Materials Literature
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Water solubilization of single-walled carbon nanotubes (SWNTs) has been achieved by functionalizing the SWNT with glucosamine. The grafting of glucosamine to the nanotubes was attained by producing acyl chloride on the carboxylic groups associated with the nanotubes. Subsequently, amide bonds were formed between the g…
We report the first systematic study of initiator density on surface-initiated polymerizations. We used mixed monolayers comprising of undecanethiol and ω-mercaptoundecyl bromoisobutyrate ( 1 ) to initiate the controlled radical polymerization of methyl methacrylate (MMA) and glycidyl methacrylate (GMA) from gold. We…
The synthesis of chiral aluminum and yttrium alkoxides and their application for lactide polymerization are reported. The complexes (SalBinap)MOR [4, M = Al, R = (i)Pr; 5, M = Y, R = (CH(2))(2)NMe(2)] are synthesized by reacting the ligand (SalBinap)H(2) [2,2'-[(1,1'-binaphthalene)-2,2'-diylbis(nitrilomethylidyne)]bis…
Electrospinning is a fabrication process that uses an electric field to control the deposition of polymer fibers onto a target substrate. This electrostatic processing strategy can be used to fabricate fibrous polymer mats composed of fiber diameters ranging from several microns down to 100 nm or less. In this study,…
The crystal structure of the title compound, C7H8NO2+·NO3−, consists of anionic and cationic layers linked by a complex three-dimensional hydrogen-bond network. Each cationic layer contains organic groups (NH3C6H4COOH)+, and each anionic layer contains inorganic (NO3)−. The structure is stabilized by two types of hydr…
For the optimization of the surface-mediated photoalignment process of a poly(di- n -hexylsilane) (PDHS) film, a systematic investigation was conducted with respect to the design of the surface azobenzene (Az) monolayer. The preparative conditions and synthetic design of the Az monolayer were investigated in terms of…
The Yb 3+ -doped non-linear rare-earth calcium oxoborate crystals GdCa 4 O (BO 3 ) 3 (GdCOB) and YCa 4 O(BO 3 ) 3 (YCOB) were investigated by low-temperature absorption and selective excitation spectroscopy. The selective excitation and emission spectra revealed the spectral features of the main Yb 3+ centre and the p…
Abstract The mechanical properties of thermoplastic starch (TPS) and poly(hydroxy ester ether) (PHEE) blends were studied as a function of the starch concentration. The moisture level present during processing significantly affects the morphology. A dispersed droplet morphology was observed even at very high starch le…
Recent experiments indicate that doping low concentrations of bent-core molecules into calamitic smectic solvents can induce anticlinic and biaxial smectic phases. We have carried out Monte Carlo simulations of mixtures of rodlike molecules (hard spherocylinders with length/breadth ratio ${L}_{\mathrm{rod}}/D\phantom{…
A series of Ni(OH) 2 −manganese oxide (NMO) compounds with a mixed layered structure were synthesized by inserting nickel hydroxide into layered manganese oxides, Na−birnessite (NaBir) and Ni−birnessite (NiBir), under hydrothermal conditions. The hydrothermal intercalation reaction and the NMO compounds were investiga…
Frechet-type polyether dendrons bearing COOH groups at the focal points have been grafted onto nanometre silica premodified with 3-aminopropyltriethoxysilane by N,N′-dicyclohexylcarbodiimide mediated amidation. The dendron grafted silicas have been characterized by FTIR spectroscopy, elemental analysis and thermogravi…
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Abstract The flame retardant effect of zinc sulphide (ZnS) in plasticised poly(vinyl chloride) (PVC‐P) materials was investigated. PVC‐P containing different combinations of additives such as 5% ZnS, 5% of antimony oxide (Sb 2 O 3 ) and 5% of mixtures based on Sb 2 O 3 and ZnS were compared. The thermal degradation an…
Abstract Novel natural clay–polymer hybrid materials are prepared from natural bentonite that was modified with silane‐coupling agent, γ‐methacryloxypropyltrimethoxysilane (A‐174), and acrylonitrile. By changing the molar ratio of acrylonitrile in the initial monomer feed, several clay–hybrid materials were prepared.…
Several tetraalkylammonium pentaorganosilicates, derived from 9,9-spirobi(9H,9-silafluorene) were prepared from the corresponding lithium silicates and isolated and characterized as storable high melting solids.
The monomer and dimer structures of cyclo[(− l -Phe 1 - d -Ala 2 ) n −] and cyclo[(− l -Phe 1 - d - Me N -Ala 2 ) n −] ( n = 3−6) were studied by using the semiempirical molecular orbital AM1 method and the density functional B3LYP method. The structural characteristics of these molecules were revealed, some of which…
We consider the statics of compound droplets made of two immiscible fluids on a rigid substrate, in the limit when gravity is dominated by capillarity. In particular, we show that the merging of four phases along a single contact line is a persistent and robust phenomenon from a mechanical and thermodynamic perspectiv…
By exploiting the self-organization of metal salt-loaded diblock copolymer micelles followed by a plasma-induced removal of the polymer matrix, well-separated gold particles ranging in size from 1.6 to 10 nm have been prepared on top of diamond substrates. X-ray-induced photoelectron spectra of the valence-band region…
We present a quantum mechanical study of carbamoylphosphine oxide (CMPO) complexes of MX(3) (M(3+) = La(3+), Eu(3+), Yb(3+); X(-) = Cl(-), NO(3)(-)) with a systematic comparison of monodentate vs bidentate binding modes of CMPO. The per ligand interaction energies Delta E increase from La(3+) to Yb(3+) and are higher…
New porphyrin assemblies containing 17 porphyrin molecules are constructed by using free base TPP-type porphyrins having eight pyrazine moieties 1. Spectroscopic titration of dimeric [meso-tetrakis(2-carboxy-4-nonylphenyl)porphyrinato]zinc(II) 2 with these porphyrins shows that the processes of the formation of the he…