thermochromism


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thermochromism

[‚thər·mə′krō‚miz·əm]
(physics)
A reversible change in the color of a substance as its temperature is varied.
References in periodicals archive ?
In order to provide 100 percent inline control of the product colour during injection moulding of plastic parts, the SKZ institute has developed and tested a method to correlate the difference in colour of an object at different temperatures - thermochromism behaviour - using colour spectrophotometers and infrared temperature sensors from Micro-Epsilon.
In fact, thermochromism is a special case of the phenomenon called "chromotropism," which refers to the changes in color caused by external influences.
A classical example of inorganic thermochromism is the temperature-induced transition between monomeric nitrogen peroxide ([NO.
The above principle may also be used to explain the thermochromism of iodine in solvents such as ethyl stearate.
Ruby shows reversible thermochromism changing from red to green through violet on heating.
The ligand field splitting theory can explain the thermochromism in other transition metal compounds also.
Above 127[degrees]C, it exhibits a reversible thermochromism turning into yellow.
The multimillion numbers of organic compounds and polymers can provide many useful examples of thermochromism [3,13].
3] ACT type mechanism causes thermochromism in compounds like poly(xylylviologen dibromide).
In the recent past, thermochromism has been achieved by the temperature-induced rearrangement of liquid crystals [15].
Liquid crystals that show thermochromism are made by microencapsulating cholesteryl ester-based compounds.