Solvatochromism, thermochromism, piezochromism, halochromism, and chiro-solvatochromism of pyridinium N-phenoxide betaine dyes

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Key Points

The review aims to summarize and analyze various types of chromism exhibited by pyridinium N-phenoxide betaine dyes.
Literature review of existing studies on chromic behaviors including solvatochromism, thermochromism, piezochromism, halochromism, and chiro-solvatochromism.
Analysis of the mechanisms and applications associated with these dyes.
Pyridinium N-phenoxide betaine dyes demonstrate notable solvatochromism, changing color with solvent polarity.
Thermochromism is observed, where the color changes with temperature variations, impacting their application in temperature sensors.
The review emphasizes the utility of these chromic properties in various applications including sensors and indicators.

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This review explores various chromic behaviors of pyridinium N-phenoxide betaine dyes, highlighting their significance in material science.

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C. L. Reichardt (1992) studied this question.

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