Deyin Huang

Synthesis and properties of some novel soluble metallophthalocyanines containing the 3-trifluromethylphenyoxy moiety

Abstract Some new tetrakis(3-trifluoromethylphenoxy)phthalocyanine complexes with cobalt, nickel or zinc were synthesized and their structures were confirmed by IR, UV–vis, 1H NMR and elemental analysis. These compounds are soluble in weakly and medium polar solvents, but their solubility in strong polar solvents such as DMF and DMSO is fairly low. It was found that the introduction of trifluoromethylphenoxy subtituents greatly affected their spectroscopic properties. The redox peaks of cyclic voltammograms possess good symmetric characteristics, indicating that they are good electron donors, and their electrochemical process is quasireversible with the introduced fluorine group.

Synthesis of coumarin dyes containing N-alkylsulfonamide groups

Coumarins containing N-alkylsulfonamide groups built into benzoxazolyl, benzothiazolyl, or benzimidazolyl systems were synthesized and then reacted with NaCN to give fluorescent red compounds. Results from a determination of the spectral properties and dyeing characteristics of these new dyes suggest that they are potential commercial solvent dyes.

A study of third-order nonlinear optical properties for anthraquinone derivatives

Abstract The ground-state geometry, second hyperpolarizabilities of the anthraquinone derivatives have been studied using finite field (FF) The molecular configurations and calculated γ zzzz values are considerably affected by substituents. The third-order nonlinear optical property of 1,4-diamino-2,3-diphenoxy-anthraquinone has been measured using picosecond degenerate four-wave mixing. The third-order nonlinear optical susceptibility χ (3) of the dye is as high as 1.16×10 −12 esu. The second hyperpolarizability (γ) value is 5.71×10 −31 esu.

Synthesis and properties of near-infrared absorbing asymmetric pyrylium–squarylium dyes containing tertiary butyl groups

Abstract Asymmetric pyrylium–squarylium dyes ( 5a – b ) were prepared by direct condensation of squaric acid with two different kinds of heterocycles. Symmetrical dyes 5d–f were isolated as by-products. Asymmetric dye 5c was synthesized via the traditional way using monosubstituted squaric acid as the key intermediate. Dyes 5a–f were characterized with the aid of 1 H-NMR, IR, mass spectroscopy and elemental analysis. The dyes exhibit high melting points and absorption maxima in the range of 720–760 nm with high extinction coefficients and higher solubility in organic solvents than other squarylium dyes.

Melting-reactive dyes for mass coloration of synthetic fibres—part I: perylene-3,4,9,10-tetracarboxylic acid dianhydride in poly(ethyleneterephthalate)

Abstract Mass coloration of poly(ethyleneterephthalate) (PET) by using a melt-reacting dye is described, and affords an economical favorable and environmentally friendly method of coloration. Perylene-3,4,9,10-tetracarboxylic acid dianhydride (PTAD) was used as a melting-reactive dye in poly(ethyleneterephthalate) and showed high thermal stability. A chain-extending reaction was confirmed by UV–vis and IR spectroscopic analysis. The effect of the proportion of the added PTAD on the intrinsic viscosity of the polymer was studied, and increasing amounts resulted in increased intrinsic viscosity. The higher viscosity is beneficial to the spinning process. The light fastness of the colored fibres was as high as 7.

Affinity studies of hypocrellin B and mono-cysteine substituted hypocrellin B with CT-DNA using spectroscopic methods

The interaction of anticancer drug hypocrellin B (HB) and mono-cysteine substituted hypocrellin B (MCHB) with calf thymus deoxyribonucleic acid (CT-DNA) has been investigated using spectral methods. The results of UV-visible spectra showed that the HB and MCHB can intercalate into the base-stacking domain of the CT-DNA double helix. Further stud- ies based on fluorescence spectroscopy and circular dichroism (CD) spectroscopy also supported the intercalation mecha- nism.

The influence of crystal structure on the dyeing property of 1,4-diamino-2,3-diphenoxyanthraquinone

Abstract X-ray crystal structure of 1,4-diamino-2,3-diphenoxyanthraquinone was determined. The compound C 26 H 18 N 2 O 4 , was monoclinic in P2 1 /a(#14) with a =7.114(2) A, b =19.603(7) A, c =14.611(5) A, β =90.40(3)°, V =2031(1) A 3 , D calc =1.381 g/cm 3 and Z =4. In the molecular structure, the anthraquinone ring retained planarity and both benzene rings were repelled outside the anthraquinone plane. Molecules in the unit cell formed a number of intermolecular hydrogen bonds that led to dye aggregation. Melting-reactive mass coloration of PMMA showed that the dye was a suitable melting-reactive dye.

Investigation of Photoinduced Electron Transfer Between ZnPcLTs and Guanine: The Role of Type I Mechanism in Photodamage of Calf Thymus DNA

Abstract The photoinduced electron transfer between ZnPcLTs and guanine was studied by steady‐state emission and electron spin resonance as well as time‐resolved absorption and emission, indicating the key role of type I (electron transfer) mechanism in photodynamic damage of calf thymus DNA by ZnPcLTs.

Melting-reactive dyes for mass coloration of synthetic fibres (II)—1,4-dihydroxyanthraquinone diglycidyl ether in nylon

Mass coloration of nylon using a melting-reactive dye is described. 1,4-Dihydroxyanthraquinone diglycidyl ether was synthesized as a novel melting-reactive dye in which the epoxy groups in the dye would react with amino groups of nylon by a nucleophilic addition mechanism. The dye was confirmed by UV–vis, IR and 1 H NMR spectroscopic analyses. The effect of the proportion of the added dye on the intrinsic viscosity of the polymer was studied. Thermal analysis showed high thermal stability and blending compatibilization. The light fastness of the coloured fibre was measured. # 2001 Elsevier Science Ltd. All rights reserved.

Surface-enhanced Raman spectroscopy study on adsorption of an emulsion stabilizer (4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene) on a silver surface

Abstract Adsorption of 4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene (TAI) on a silver surface has been investigated by means of surface-enhanced Raman spectroscopy (SERS). The basic principles of the technique are presented. The relationship between the intensities of SERS and oxidation/reduction cycles (ORCs) was also investigated.