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A strategy for continuous fabrication of a microscale 3D-patterned hybrid composite film composed of alumina and acrylate resin was developed using roll-to-roll production. Conventional thermal curing was replaced with a UV curing procedure to facilitate rapid and economical processing. A seamless engraved soft urethane mold was first produced using a patterned metal roll. Subsequently, alumina and acrylate resin were cured on the engraved mold via UV irradiation to produce patterned hybrid films. The dispersion of alumina particles in acylate resin was enhanced by utilizing amine acrylate. Photopolymerization was measured using Fourier-transform infrared spectroscopy. The morphology of the soft engraved mold and the patterned hybrid film was investigated using scanning electron microscopy.
Palladium-catalyzed Suzuki–Miyaura coupling of 5-functionalized Ni(II) porphyrins with 1,3,6,8-tetrafunctionalizedpyrenes was carried out to obtain two kinds of porphyrin–pyrene hybrids. These compounds were comprehensively characterized by nuclear magnetic resonance (NMR), high-resolution mass spectrometry and ultraviolet-visible (UV-vis) absorption spectrometry, and their electrochemical properties were studied by both cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Fluorescence spectra for zinc compounds and free-base compounds were performed. In addition, the structure of 4Zn, a porphyrin tetramer, was determined by X-ray diffraction analysis, in which two planes formed by the porphyrin unit and the pyrene moiety adopt nearly perpendicular geometry with two sets of dihedral angles displaying 85.14 (4)° and 83.90 (4)°, respectively. In the UV-vis absorption spectra, the maximum wavelengths of Soret bands and Q bands for these hybrids were observed at 434 and 648 nm. As the number of porphyrin units increases, the corresponding molar extinction coefficient rises markedly, in which the maximal value is 7.4 × 105 M−1 • cm−1 belonging to 4Zn. Moreover, the presence of energy transformation from the pyrene moiety to the porphyrin unit has been proved by emission spectra. Finally, the electrochemical properties of these porphyrin–pyrene hybrids were analyzed by using cyclic voltammetry and differential pulse voltammetry, which show that the nickel hybrids possessed the maximal electrochemical highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gap and the zinc compounds displayed the minimum electrochemical HOMO–LUMO gap.
Carbon nanotube-inorganic hybrid materials have stimulated a new boost in CNT research as a new class of multifunctional materials with properties distinct from the well-known CNT composites. Synergistic effects based on interfacial charge and heat transfer processes commend these hybrids for use in photocatalysis, gas sensors and in electrochemical devices. A major challenge is the synthesis of hybrids with hierarchical architectures and controlled interfaces. Common wet-chemical techniques have the major drawback that the CNT array typically collapses upon drying due to stresses imposed by the surface tension of the solvent. In this work, we synthesized hierarchical hybrids with coherent 3D architectures using unique CNT fibers, based on the "Cambridge process" as well as vertical arrays of CNTs ("carpets"). We demonstrate that separating the liquid reactants from the CNT array is key to preserving the hybrid's architecture. In addition, we show that the presence of benzyl alcohol as a linking agent is beneficial to maximizing the interfacial area in TiO2-coated CNT fibers.