Resumen de Solvatochromism and Barochromism Revisited and Revealed.

Satoshi Hirayama, Ronald P. Steer

• A simplified treatment of the traditional theory of solvatochromism, attributed to Bayliss and McRae, is presented and used to describe the four main types of dipolar and dispersive physical interactions between solute and solvent. The theory is extended so that it may also be used to describe barochromism (pressure-induced spectroscopic shifts). The UV�vis spectrum of azulene, which exhibits unusual barochromism, is used as an illustrative example.