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What causes the difference in coloring power between organic pigments and inorganic pigments?

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What causes the difference in coloring power between organic pigments and inorganic pigments?

The difference in coloring power between organic pigments and inorganic pigments is caused by the difference in the mechanism of color generation and is caused by the difference in the basic chemical structure of the two pigments.The color representation of organic pigments is based on the existence of a conjugated double bond system (electron system) color group in the structure. Electrons of the conjugated double bond transition from the ground state to the excited state through the selective absorption of visible light. Therefore, the colors displayed by organic pigments are complementary colors.

 

 

Inorganic pigments do not contain any double bonds or hair color groups. All chemical elements consist of positive nuclei (protons) surrounded by (negative) electrons.The size of the nucleus and the number of electrons are determined by the position of the elements in the periodic table.All elements in the periodic table are located according to the number of atoms in their periodic cycle, which determines the number of electrons and the arrangement of electron layers.It takes a certain amount of energy for an electron to jump from the ground state to the excited state, that is, from a lower energy level to a higher energy level.The transition from the excited state to the lower level (ground state) results in a series of emission lines whose wavelengths are within the range of visible light.The intensity of light emitted by inorganic pigments is lower than that produced by conjugated double bonds in organic pigments, which is the reason why the coloring power of inorganic pigments is very low.

 

Pub Time : 2019-12-09 14:54:35 >> News list
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