Materials Literature
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Abstract BACKGROUND: The thermal behaviour of poly(lactic acid) (PLA) in contact with compressed CO 2 was studied using high‐pressure differential scanning calorimetry. In particular, the effect of annealing below and above the glass transition temperature ( T g ) on the glass transition, cold crystallization and melt…
Abstract Carbon nanotubes (CNTs) are used as templates to synthesize regioselective polymers from enzymatic polymerization of phenol in water. About 90% of total polymeric units in the obtained polymers are the highly thermally stable oxyphenylene units. The polymer‐yields are dependent on the quantities of CNTs used.…
Nickel–manganese mixed oxides were prepared with sol–gel and coprecipitation methods. The characterization of the different samples was made by XRD, TPR, FT-IR and Raman spectroscopies. NiMn 2 O 4 spinel was obtained at a calcination temperature of 900 °C; the solids calcined at 750 °C give in addition to the spinel p…
The novel amphipilic conjugate of a calix[4]arene with four Gd-1,4,7,10- tetra(carboxymethyl)-1,4,7,10-tetraazacyclododecane (DOTA) chelates has potential as a magnetic resonance imaging contrast agent, both in its monomeric and in its micellar form. The system, illustrated here with its nuclear magnetic relaxation pr…
Using ambient atmosphere instead of pure nitrogen environment enabled efficient recording of room temperature fluorescence from single molecules of porphycenes, chromophores with a high triplet formation efficiency. Double hydrogen transfer between two chemically identical trans tautomers has been demonstrated for par…
The fluorinated quinacridone derivatives N,N'-dialkyl-2,9-difluoroquinacridone (Cn-DFQA, n = 4, 8, 10, 16) with different alkyl chains were used as building blocks to assemble luminescent micromaterials. It was demonstrated that the morphology and emission of the Cn-DFQA-based micromaterials strongly depended on their…
We present an impulsive stimulated scattering test of the "shoving model" of the glass transition and of the correlation between the fragility index and the ratio of instantaneous elastic moduli of eight supercooled liquids. Samples of triphenyl phosphite, DC704 (tetramethyl tetraphenyl trisiloxane), m-fluoroaniline,…
On the application of hydrostatic pressures of up to 1.3 GPa, the superconducting transition temperatures (T(c)) of samples of LiFeAs are lowered approximately monotonically at approximately -2 K GPa(-1). Measurements of the X-ray powder diffraction pattern at hydrostatic pressures of up to 17 GPa applied by a He gas…
The thymidylic acid appended anthracene dye 2,6-bis[5-(3'-thymidylic acid)pentyloxy]anthracene (1) was synthesized, and the self-assembly of 1 and the binary self-assembly of 1 with a complementary single-stranded 20-meric oligodeoxyadenylic acid (dA(20)) were performed in 0.1 x TE buffer solution (i.e., 1.0 x 10(-3)…
Hydroxide zinc carbonate (HZC) films with different morphologies were deposited on zinc plates through a convenient chemical-bath deposition (CBD) process using urea solution. By altering deposition conditions, the structure of HZC crystals could be tuned from vertically aligned nanosheets to flowerlike microstructure…
Naphthopyran polymer conjugates of various rigidities were synthesized by atom transfer radical polymerization (ATRP), and their photochromic properties were tested within a rigid host matrix. Broad tuning of photochromic kinetics was displayed as a result of polymer conjugation because of its ability to alter the loc…
Self-assembly of Fe(2+) or Ni(2+) ions and the ditopic ligand 6,6',6''-bis(2-pyridyl)-2,2':4',4'':2'',2'''-quaterpyridine (btpy) through coordinative binding results in rodlike metallosupramolecular coordination polyelectrolytes (Fe-MEPE or Ni-MEPE). Sequential self-assembly with dihexadecyl phosphate (DHP) via electr…
We employ first-principles calculations to investigate the structural stability and electronic properties of zinc oxide (ZnO) nanowires adsorbed with different chemical functional groups. The nanowires with one hydrogen monolayer on the surfaces adsorbed with both O and Zn atoms maintain their bulklike geometries, whe…
We report $^{75}\text{A}\text{s}$ nuclear magnetic resonance (NMR) data in a single crystal of ${\text{CaFe}}_{2}{\text{As}}_{2}$. The Knight shift, electric field gradient, and spin-lattice relaxation rate are strongly temperature dependent in the paramagnetic state and change discontinuously at the structural transi…
The steady-state absorption and emission spectra and the temporal fluorescence decay profiles of two metallocorroles, Al(tpfc)(py)(n) and Ga(tpfc)(py)(n) (n = 1,2), have been measured in a noncoordinating solvent, benzene, in a coordinating solvent, pyridine, and in mixed benzene-pyridine solutions. The ground-state s…
Homogeneously alloyed ternary CdTeSe magic-sized nanocrystals (MSNs) with bandgap emission were synthesized in 1-octadecene (ODE) via a noninjection one-pot approach featuring synthetic reproducibility and large-scale capability. The noninjection approach used cadmium acetate dihydrate (Cd(OAc) 2 ·2H 2 O), elemental s…
The manuscript addresses the synthesis and characterization of one colloidal CdSe single-sized nanocrystal ensemble exhibiting bandgap absorption and emission peaking at 463 and 465 nm, respectively, with full width at half-maximum of ca. 8 nm. This ensemble is called Family 463; also, these single-sized quantum dots…
A general method for the synthesis of hyperbranched functional polymers in monoterpenes is described. During the polymerization of dicyclopentadiene, metathesis reactions between the growing polymer chain and monoterpenes produced soluble well-defined polymers. The molecular weight, intrinsic viscosity [η], and glass…
A simple and efficacious procedure for the synthesis of magnetite nanoparticles has been achieved via a sonochemical miniemulsion polymerization process. The sonochemically synthesized magnetite encapsulated polymer latex particles exhibit excellent colloidal stability and strong magnetic properties, and are of a size…
Making and breaking: Stable, functional micrometer-sized emulsion droplets can be assembled into various complex macroscopic liquid structures (see picture). The hierarchical assembly process is mediated by interactions between polymeric surfactant molecules located on the droplet surfaces. These interdroplet interact…