Advanced Materials Research Vol. 441

Abstract: This paper describes a new method to prepare silver nanoparticles useful for printing electronic circuits. We have tried to develop a silver nitrate reduction method, with which a certain reducing agent has played an important role in the reduction of silver ions in an aqueous solution. The reduction has occurred rapidly at room temperature and the silver particles have been separated very easily from the solution in a short time. In this process, any organic solvent has not been used and separation of silver nanoparticles has not been complicated. All chemicals used in this study have been water-soluble. Small and relatively uniform particles of a diameter lower than 10 nm can be obtained with high purity and high yield. These can result in low cost, safe treatment and good for environment protection. This method of producing colloidal silver nanoparticles will find practical use in electronics applications.

Abstract: In this paper, a shrinkproofing treatment of wool fabrics was carried out by excilamp combined with enzyme. Shrinkproofing properties of the treated fabrics were evaluated by measuring the values of directional friction effect (DFE), felting shrinkage and weight loss. The results showed that felting shrinkage of the treated wool fabrics could achieve the machine washability standard (ISO 6330 and IWS TM 31) with low fiber damage. Surface morphology and chemical composition of the treated fabrics were observed and analyzed by SEM and FTIR-ATR. This treatment was compared with low-temperature oxidation combined with enzyme method (ARS Process).

Abstract: Dyes and fluorochromes are used in biology and medicine to generate informative microscopic and macroscopic images. This means that the presence, location, biological structure, chemical content and physiological function of cells, tissues and whole creatures can be investigated. A wide range of dyes, both textile and functional, are used in this way. It is suggested that the various groups of stakeholders involved in this approach-end-users in biomedicine; synthesizers, manufacturers & vendors of dyes; and regulators and standardizers-have much to gain by becoming significantly better connected with each other. Broadly speaking, textile dyers use colorants to make socks and shirts and ties more visually attractive, which is not an objective of professional concern to biologists or clinicians. Biomedical applications of colorants are commonly aimed at obtaining information about living systems, using imaging technologies. There are also non-imaging dye applications in which they are used as drugs or analytical reagents, but these are not considered here. Note: below, “dyes” often implies fluorochromes, whilst “biomedicine” is short for biology and medicine.

Abstract: Purple sweet potatoes were applied to extract anthocyanins for dyeing silk fabrics. Dyeing and anti-ultraviolet properties of anthocyanins were investigated. The color yield, exhaustion behaviors, fastness properties and anti-ultraviolet properties of dyed silk fabrics were also discussed. The results showed that high color strength value (K/S value = 3.01) was achieved at 50 °C and pH 3. The washing and rubbing fastness properties were enhanced by mordant dyeing method using alum. The dyed silk samples displayed good anti-ultraviolet and the UV transmittance was decreased by 46% at 300nm and 58% at 360nm.

Abstract: Wool fibers have higher elasticity than synthetic fibers, and are superior in the properties of vapor absorption and desorption. However, the only fault of wool is its felting propensity during home laundering. Although various anti-felting treatments to reduce the felting property have been developed and used industrially, there are still problems such as environmental issues and changes of fabric handle. These issues were studied in this paper. The effect of DCCA, NaOCl and plasma treatments on anti-felting property, fabric handle, yellowing, color intensity and hydrophilicity were especially investigated. It is concluded that NaOCl method is the best treatment in the points of anti-felting, fabric handle, yellowing and color intensity.

Abstract: The complex 1 (FeC₂₀H₂₄N₃O₇) was synthesized from (R, R)-N,N-bis (salicylal )1,2-cyclohexanediamine (H₂L) and Fe (NO₃)₃. The complex 1 has been characterized by the elemental analysis and IR spectra. The crystal structure of the complex 1 was determined by single-crystal X-ray diffraction. Crystal data for the complex 1: space group C2/c , with a = 18.967(2)Å, b = 14.526(2)Å, c = 15.3927(18)Å, α=90.00º, β= 95.885(3) º, γ=90.00º, Z=8, V= 4218.5(9) Å ³, Dc= 1.494 mg.m^-3, µ= 0.763mm^-1, F(000)= 1976. The results of crystal structure determination show that there exists rich H-bond. The complex 1 is composed of one [Fe (L^2-) (H₂O)₂] ⁺ cation and one nitrate anion. The L^2- and two H₂O molecular are attached to the Fe³⁺ via coordinate bond. The nitrate anion is attached to the cation through hydrogen bond with H (3A) and H (4B) atom. The Fe (III) atom is six-coordinated by linking to one quarter-dentate chelating ligand (L^2-) and two mono-dentate chelating H₂O ligands.

Abstract: (S,S)-N,N’- bi-(benzal)-1,2-cyclohexanediamine Schiff base (1) was synthesized and characterized by ¹ H NMR spectra, MS spectra and IR spectra. And the coordination reaction of 1 with chlorate of Ni(II) was studied. The reaction of 1 with Ni^II salt [NiCl₂] generates a new compound (2). 2 was characterized using IR spectroscopy, elemental analysis and single-crystal X-ray diffraction. Crystal data for 2: space group Coca, with a = 24.580(4)Å, b = 9.5829(13)Å, c = 7.6836(11)Å, α=90.00º, β=90.00º, γ=90.00º, Z=4, V= 1809.8(5)ų, Dc=1.446 mg.m^-3, µ=1.376 mm^-1, F(000)=840. There are 6 coordination sites around Ni²⁺ of 2, which are respectively occupied by two oxygen atoms (all from two H₂O molecules) and four nitrogen atoms [all from two 1,2-cyclohexanediamine molecule]. The Ni atom and four chelating nitrogen atoms are coplanar. There exist intra-molecular H-bond and intermolecular H-bond. The mechanism of metal-assisted decomposition of 1 was also discussed briefly.

Abstract: To yield a series of upper rim mono-substituted compounds with potential possibility to polymerize with other monomers, the p-tert-butyl groups were removed from the p-tert-butylcalix[ arene, and acrylamido groups were incorporated. These target products were characterized by IR, ¹H NMR, elemental analysis and ESI-MS. The transport of K⁺ ion was studied. Results indicate the substituting groups with the ability to withdraw electron are benefit to the net transport.

Abstract: The synthesis and characteristics of a new styryl colorific and fluorescent dual signal probe for DNA are described. Sty-HPy shows a high fluorescence enhancement (> 35-fold) in conjunction with a visible colorific change (45 nm red-shift) when bound to dsDNA. The large Stokes shift (140 nm) and sensitive colorific response to DNA are both attributed to the rational design of intramolecular charge transfer (ICT) intra Sty-HPy.

Abstract: P, Mo metal-salt catalysts (M_xO_y-MoO₃-P₂O_5, M = Cu, V, Ni, Cr) were prepared and investigated by means of Fourier transform infrared and X-ray photoelectron spectroscopy. All catalysts exhibited good catalytic activity for the electrochemical catalytic oxidation of p-xylene in methanol solvent assisted with a pair of porous graphite plane electrodes at room temperature and atmospheric pressure. Higher than 88% chemical conversion of the main product (methoxy-dimethylbenzene) was observed, and the products used as booster to improve fuel combustion were also studied.