Materials Literature
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The solvent-dependent aggregation properties of a water-soluble cationic poly(fluorene) were studied and used to control fluorescence resonance energy transfer to Texas Red-labeled DNA.
Fine powders of propylammonium-exchanged Na2Ti3O7 were successfully converted to transparent thin films by swelling (and exfoliating) the material in water and subsequent casting and drying the obtained titanate sol on a substrate. The dispersion of the material was promoted by sonication and hydrothermal treatment of…
The synthesis and characterization of new spin-crossover pyrazolato bridged dinuclear [(FeII(NCS)(py))2(mu-bpypz)2] and the corresponding cyanotrihydroborato-kappaN complexes are described together with the X-ray crystal analysis of the latter in both the high-spin and low-spin states as well as the variable temperatu…
The methacrylate ligands of the cluster Zr6O4(OH)4(methacrylate)12 undergo degenerate exchange with methacrylic acid in solution. Addition of propionic or isobutyric acid allows partial or complete exchange of the methacrylate ligands for propionate or isobutyrate. The mixed-carboxylate cluster Zr6O4(OH)4(OMc)8(isobut…
Various engineered domain configurations were induced into barium titanate (BaTiO3) single crystals, and their piezoelectric properties were investigated as a function of (1) the crystal structure, (2) the crystallographic orientation and (3) the domain size. As a result, the orthorhombic mm2 BaTiO3 crystals showed th…
Layered double hydroxides (LDHs) with different kinds of metal ions (Mg–Al, Co–Fe, Ni–Fe, and Mg–Fe) in the brucite layers were prepared and their anion exchange properties were studied by measurements of distribution coefficient (Kd) and ion exchange capacity. The basal spacing of LDHs varied depending on the kind of…
Colloidal Au nanoparticles have been functionalized with mercaptopropane sulfonate (MPS) and mercaptoethylamine (MEA) short alkanethiols in aqueous solutions. Adsorption kinetics of these charged thiols onto gold nanoparticles has been followed by the decrease in the surface plasmon band at 530 nm due to the red shift…
A series of M(II) complexes with the ligand 3,5-pyrazoledicarboxylic acid (H3dcp) has been synthesised mainly via hydrothermal reactions and their structures have been characterised. Simple mononuclear [Ni(Hdcp)(H2O)4] (1), Na2(mu-H2O)2(H2O)8[Ni(Hdcp)2(H2O)2] (2), [M(H2dcp)2(H2O)2] x 2H2O [M = Co (3), Zn (4) and Cu (5…
(LNF) is one of the promising cathode materials for intermediate-temperature solid oxide fuel cells (SOFCs). However, LNF is more reactive with -based electrolyte than conventional in the sintering temperature region. In this paper, we examine the relationships among LNF sintering characteristics, reactivity, and cell…
A heterometallic complex, Na(2)[Co(II)(2)Co(III)(2)(IDC(3-))(4)(bipy)(4)].12H(2)O (bipy = 2,2'-bipyridine), in which mixed-valence tetranuclear squares with imidazoledicarboxylate (IDC(3-)) linkers are tethered into a unique chain through disodium units, is hydrothermally synthesized and structurally and magnetically…
In this paper we report on the synthesis and oxidation behavior of the layered ternary carbides V 2 AlC and ( Ti 0.5 , V 0.5 ) 2 AlC . The oxidation kinetics were studied thermogravimetically in air in the 500 to 700°C temperature range. The oxidation of V 2 AlC is governed by the inward migration of O, and possibly t…
The composition of Ti-30Nb-10Ta-5Zr, which is simplified that of the Ti-29Nb-13Ta-4.6Zr alloy developed for biomedical applications, was selected, and then Nb content in the basic composition was varied from 20 to 35%. The deformation mechanisms of such Ti-Nb-Ta-Zr system alloys were investigated by loading-unloading…
A novel heterogeneous catalyst, [Zn(2.15)Al(0.86)(OH)(6.02)][Mn](0.19)[C(6)H(5)COO](0.48.2H(2)O, where [[Mn]= chiral sulfonato(-)salen-manganese(iii) complex, Na(2)MnC(20)H(22)N(2)S(2)O(12)Cl, intercalated into Zn(II)-Al(III) layered double hydroxide host], has been synthesized and found to be an effective heterogeneo…
A new analytical methodology, complex capacitance analysis, is developed for porous carbons that are employed as electric double-layer capacitor (EDLC) electrodes. Based on the transmission line model, the imaginary capacitance profiles vs. are theoretically derived for a cylindrical pore and further extended to multi…
The synthesis and structural characterisation of three small nickel(II) cages are reported, all stabilised by pivalate ligands. The magnetic properties of the cages have been studied by a combination of susceptibility measurements and inelastic neutron scattering. For a dinuclear cage, [Ni2(mu-OH2)(O2CCMe3)4(HO2CCMe3)…
A variety of hierarchical oxide nanostructures, including ZnO nanonails on nanowires/nanobelts, ZnO nanorods on nanobelts, comb-like ZnO nanostructures, hierarchical MgO nanowires, etc., have been synthesized by thermal vapor evaporation and condensation. Observation of these nanostructures demonstrates the diversity…
This article reviews the optical properties of fluorinated polyimides (FPIs) that exhibit outstanding optical transparency as well as excellent thermal, mechanical, and electric properties for the applications to optical components, in particular for telecommunication applications. The optical transparency of polyimid…
Alkali treatment was performed on ‘Curaua' fibers to improve their mechanical properties. Curaua fibers were dipped into 5%, 10%, and 15% concentrated sodium hydroxide solutions for 1h and 2h. The effects of solution concentrations and treatment times on the physical and mechanical properties of curaua fibers were eva…
The hydrothermal reaction of thiosalicylic acid, (C(6)H(4)(CO(2)H)(SH)-1,2) with manganese(III) acetate leads to formation of the coordination solid [Mn(5)((C(6)H(4)(CO(2))(S)-1,2)(2))(4)(mu3-OH)2] (1) via a redox reaction, where resulting manganese(II) centres are coordinated by oxygen donor atoms and S-S disulfide b…
This chapter considers thermal spin crossover occurring in transition metal compounds other than those of Fe(II), Fe(III) and Co(II). Unusual magnetic properties of several coordination and organometallic complexes of Mn(II), Mn(III), Cr(II) and Co(III) are discussed in the light of their structural features.