Synthesis,characterization and aggregation and fluorescence properties of novel highly soluble zinc phthalocyanines bearing tetrakis-4-(3-(piperidin-1-yl)phenoxy) with tetra and dodecachloro substituents     

Palanisamy Muthukumar  Hak-Soo Kim  Kyo-Sun Ku  Jong Ho Park  Young-A. Son 《Fibers and Polymers》2016,17(4):553-559

The synthesis of two new phthalocyanine precursors 4-(3-(piperidin-1-yl)phenoxy) with mono (2) and trichloro (3) substituents were carried out in this work. Cyclotetramerization of these precursors with zinc acetate gave novel tetrakis-4-(3-(piperidin-1-yl)phenoxy) with tetra (4) and dodecachloro (5) substituted zinc phthalocyanines. The synthesized new compounds were characterized using FT-IR, ¹H NMR, electronic absorption spectroscopy, mass spectra and elemental analysis. The aggregation behavior of zinc phthalocyanines 4 and 5 was investigated in different concentrations of dichloromethane (DCM). Zinc phthalocyanines 4 and 5 showed good solubility in different organic solvents such as DCM, CHCl₃, THF, benzene and toluene. Further, the aggregation behavior of zinc phthalocyanines 4 and 5 was studied before and after the addition of Triton X100. Further, the fluorescence quantum yields of zinc phthalocyanines 4 and 5 were calculated in the presence and absence of Triton X100.  相似文献   

Microwave heat dyeing of polyester fabric     

Kim  Sam Soo  Leem  Su Gyung  Ghim  Han Do  Kim  Joon Ho  Lyoo  Won Seok 《Fibers and Polymers》2003,4(4):204-209

The effect of padding solution on the microwave heat dyeing of polyester fabric was studied extensively. Polyester fabrics were impregnated in aqueous urea solution and aqueous sodium chloride solution for 10 min and then dyed for 7 min by microwave apparatus (2 450 MHz, 700 W) under optimum conditions which provide good exhaustion. Aqueous solutions of urea and sodium chloride showed more effective than water as a padding solution for microwave heat dyeing. The type of solvent added in padding media and its concentration significantly affects the K/S values of dyed polyester fabric. Added solvents such as n-hexane, acetone, and dimethyl formamide were also more effective than 100% water as padding media for the microwave heat dyeing. It is supposed that the effect of used solvents on dyeing property of polyester fabrics depends on the solubility parameter difference between solvent and polyester fabric.  相似文献   

Removal of static electricity on polyimide film surface by O2 or Ar cold plasma etching     

Lee  Jae Ho  Jeong  Hee Cheon 《Fibers and Polymers》2004,5(2):151-155

Cold plasma of O₂ or Ar was irradiated on hydrophobic Kapton surface to attenuate or remove the electrostatic potential. A measurement on charge dissipation speed clarifies the obscure effect of plasma. These consequences reveal that O₂ plasma etching is more effective than Ar plasma. After 30 days, the dissipation speed of accumulated charge on initially etched sample has not changed under summar season.  相似文献   

The fabrication and characterization of the photovoltaic cells composed of polydiacetylene and fullerene     

Jeong Ho Song  Tae Jo Kang  Young Don Cho  Sun Hyoung Lee  Jeong Soo Kim 《Fibers and Polymers》2006,7(3):217-222

Propargyl alcohol was coupled to 2,4-hexadiyne-1,6-diol (HDD) and crystallized in the process of ultraviolet irradiation-induced topochemical polymerization. The HDD polymer crystals were used as one component in the fabrication of organic photovoltaic cells, in combination with fullerene as the electron acceptor. The various structures of the produced photovoltaic cells included bilayer, trilayer, and bulk heterojunction structures. Their photovoltaic properties were analyzed in relation to crystal structure, electrochemical properties, and band structure of the HDD polydiacetylene polymers.  相似文献   

Changes of the lipid catabolism in potato tubers from cultivars differing in susceptibility to autolysis during the storage     

Ewa Łojkowska  Maria Hołubowska 《Potato Research》1989,32(4):463-470

Summary The activities of lipolytic acyl-hydrolases (LAH) and lipoxygenases (LOX) were compared in stored tubers of potato cultivars resistant (Acresta, Eba, Pentland Envoy) and susceptible (Kastor, Pana, Tasso) to post-wounding autolysis. In most cultivars, LAH activities had reached a maximum by the end of December but in cv. Kastor activity continued to increase throughout the storage period. LOX activities increased during most of the storage period except in cv. Tasso. The level of the fatty acid hydroperoxides, assumed from determinations of the malonaldehyde level, also increased during storage. This work was supported by Project CPBP 05.02.2.10 financed by the Polish Academy of Science.  相似文献   

Electrokinetic remediation of heavy metal-contaminated soils: performance comparison between one- and two-dimensional electrode configurations     

Kim  Soon-Oh  Jeong  Jin Young  Lee  Woo-Chun  Yun  Seong-Taek  Jo  Ho Young 《Journal of Soils and Sediments》2021,21(8):2755-2769

Journal of Soils and Sediments - Electrokinetic (EK) soil remediation is significantly affected by the electrode configurations. Therefore, this study was conducted to compare the performance of...  相似文献   

Characterization of carboxylesterase-mediated pirimicarb resistance in Myzus persicae     

Deok Ho Kwon  Si Woo Lee  Si Hyeock Lee 《Pesticide biochemistry and physiology》2009,93(3):120-126

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Preparation and acid dye adsorption behavior of polyurethane/chitosan composite foams     

Ho Cheon Lee  Young Gyu Jeong  Byung Gil Min  Won Seok Lyoo  Sang Cheol Lee 《Fibers and Polymers》2009,10(5):636-642

We prepared a series of polyurethane(PU)/chitosan composite foams with different chitosan content of 5∼20 wt% and investigated their adsorption performance of acid dye (Acid Violet 48) in aqueous solutions with various dye concentrations and pH values. It was observed that PU/chitosan composite foams exhibited well-developed open cell structures. Dye adsorption capacities of the composite foams increased with the increment of chitosan content in composite foams, because amine groups of chitosan serve as the binding sites for sulfonic ions of acid dyes in aqueous solutions. In addition, dye adsorption capacities of composite foams were found to increase with decreasing the pH value, which stems from the fact that the enhanced chemisorption between protonated amine groups of chitosan and sulfonic ions of acid dye is available in acidic solutions. The dye adsoption kinetics and equilibrium isotherm of the composite foams were well described with the pseudo-second order kinetic model and Langmuir isotherm model, respectively. The maximum adsorption capacity (q _max) for the PU/chitosan composite foams with 20 wt% chitosan content is evaluated to be ca. 30 mg/g.  相似文献   

cDNA cloning of myosin heavy chain from white croaker fast skeletal muscle and characterization of its complete primary structure   总被引：1，自引：1，他引：0  

Sung Ho Yoon  Makoto Kakinuma  Yasushi Hirayama  Tsuneji Yamamoto  Shugo Watabe 《Fisheries Science》2000,66(6):1163-1171

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Long‐term field insecticide susceptibility data and laboratory experiments reveal evidence for cross resistance to other neonicotinoids in the imidacloprid‐resistant brown planthopper Nilaparvata lugens     

Tomohisa Fujii  Sachiyo Sanada‐Morimura  Takaho Oe  Manami Ide  Dinh Van Thanh  Ho Van Chien  Phan Van Tuong  Phung Minh Loc  Le Quoc Cuong  Ze‐Wen Liu  Zeng‐Rong Zhu  Jian‐Hong Li  Gang Wu  Shou‐Horng Huang  Gerardo F Estoy  Shoji Sonoda  Masaya Matsumura 《Pest management science》2020,76(2):480-486

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