Thermochromism 종류 및 소개

소개글

Thermochromism 화합물의 종류 및 반응에 대한 정리 내용입니다.

목차

Organic Compound
Polymer
Sol-Gel
Conclusion

본문내용

Organic Compound
Polymer
Sol-Gel
07. 12. 28 (Fri)
Today, I will introduce the thermochromism of organic and inorganic compound, polymer and sol-gel.
I will talk about these examples.
Fiber, Optics, Optic storage device, Optic sensor
Clearly color change and fine control
High Cost and Low Color Density
Mechanism: Isomerization, Tautomerization, Cis-Trans Isomerization,
Ring-Opening/Ring-Closing (Structural change)
=> Variation in Crystal Structure (Liquid crystal)
=> Stereoisomer
=> Molecular Rearrangement
Crystalline Solid
Isotropic Liquid State
Intermediate Phase
(Mesophase)
Organic Compound
ex. Thermochromic Printing Ink
Liquid crystal
Cholesteric mesophase
First, The organic compounds used in fiber, optics, optic storage device and optic sensor.
This thermochromism have advantage of clearly color change and fine control, but the higt cost and low color density is disadvantages.
The color could be changed by this mechanism in this statement.
For example, When crystalline solid is transformed into isotropic liquid state, the intermediate phase as cholesteric mesophase is created.
This mesophase is stable and useful at atmosphere in thermochromic printing ink technique.
Bianthrone
Dixanthylene
Ethlyene Group, Aromatic ring, Hetero Atom (Nitrogen, Oxygen)
Restriction Effect
Stereoisomeric Configuration
Overcrowded Ethylene
Stereoisomer variation
Compounds

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