Gasochromism is closely related to electrochromism

Electrochromism

Electrochromism is the phenomenon displayed by some materials of reversibly changing color when a burst of charge is applied. Various types of materials and structures can be used to construct electrochromic devices, depending on the specific applications....

. The process involves the interaction of an electrochrome, usually a metal oxide, such as tungsten oxide, with an oxidizing or reducing gas, commonly oxygen and hydrogen, producing reversible color changes. The gasochromic technology is used commercially in reversible smart windows

Smart windows

Smart glass, EGlass, or switchable glass, also called smart windows or switchable windows in its application to windows or skylights, refers to electrically switchable glass or glazing which changes light transmission properties when voltage is applied.Certain types of smart glass can allow users...

 and gas sensing, oxygen, hydrogen, nitric oxide, hydrogen sulphide and carbon monoxide.

Reference

• Monk, M.S., Mortimer, R.J., & Rosseinsky, D.R., Electrochromism and Electrochromic Devices, Cambridge UP, UK, 2007. ISBN 978-0-521-82269-5

Chromism

Chromism

In chemistry, chromism is a process that induces a change, often reversible, in the colors of compounds. In most cases, chromism is based on a change in the electron states of molecules, especially the π- or d-electron state, so this phenomenon is induced by various external stimuli which can alter...

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