Indoor Photochemistry

Photochemistry is a rapidly growing research area in the field of indoor chemistry. Advances in measurement techniques and predictive models have altered our understanding of the effects of light on the composition of indoor atmospheres. Large knowledge gaps remain, however, including the question, “does photochemistry matter indoors?”. This chapter introduces readers to basic principles of photochemistry; provides context to indoor photochemistry using examples from better-understood outdoor atmospheric photochemical reactions; discusses our current understanding of the processes that control indoor photochemical reactions; outlines experimental and theoretical techniques commonly used to study indoor photochemistry; and provides some thoughts for the future.