Title compounds have been synthesized.The structures and properties are determined by elemental analysis,UV Vis,IR spectrum,fluorescence spectrum,polarizing microscope.The synthetic conditions of porphyrin derivatives...Title compounds have been synthesized.The structures and properties are determined by elemental analysis,UV Vis,IR spectrum,fluorescence spectrum,polarizing microscope.The synthetic conditions of porphyrin derivatives and their properties,UV Vis,fluorescence spectrum are discussed briefly.展开更多
Four new crown squarylium cyonine dye(2a～2d)were synthesized by condensation of squaric acid with crown benzothiazolium halide(1a～1d) in the presence of pyridine.Their structures have been confired by IR,UV Vis, 1H ...Four new crown squarylium cyonine dye(2a～2d)were synthesized by condensation of squaric acid with crown benzothiazolium halide(1a～1d) in the presence of pyridine.Their structures have been confired by IR,UV Vis, 1H NMR,MS and elemental analyses.It was found that these crown squarylium cyanine dye (2a～2d) were in reserse photochromie equilibriam.展开更多
This paper discusses the factors influencing pigment dispersion, such as pedicle size and its distribution, the dispersingart, dispersant and so on. The theories of steric stabilization, deplction flocculation and dep...This paper discusses the factors influencing pigment dispersion, such as pedicle size and its distribution, the dispersingart, dispersant and so on. The theories of steric stabilization, deplction flocculation and depletion stabilization are suitable forinterpreting experimental results in UV-cured ink. The UV-cured ink of good dispersion is obtained.展开更多
文摘Title compounds have been synthesized.The structures and properties are determined by elemental analysis,UV Vis,IR spectrum,fluorescence spectrum,polarizing microscope.The synthetic conditions of porphyrin derivatives and their properties,UV Vis,fluorescence spectrum are discussed briefly.
文摘Four new crown squarylium cyonine dye(2a～2d)were synthesized by condensation of squaric acid with crown benzothiazolium halide(1a～1d) in the presence of pyridine.Their structures have been confired by IR,UV Vis, 1H NMR,MS and elemental analyses.It was found that these crown squarylium cyanine dye (2a～2d) were in reserse photochromie equilibriam.
文摘This paper discusses the factors influencing pigment dispersion, such as pedicle size and its distribution, the dispersingart, dispersant and so on. The theories of steric stabilization, deplction flocculation and depletion stabilization are suitable forinterpreting experimental results in UV-cured ink. The UV-cured ink of good dispersion is obtained.
