Twenty–first century innovation today. Advances in Photochemistry A critical evaluation by internationally recognized experts of some of the most important work currently being done in photochemistry, Volume 22 of this respected series provides a glimpse into the possible shape of the science tomorrow. Each article is intended as a catalyst for further research and discussion, allowing chemists to widen their interests and broaden the boundaries of experimentation. In this volume Ultraviolet Photodissociation Studies of Organosulfur Molecules and Radicals: Energetics, Structure Identification, and Internal State Distribution C. Y. NG Photoreactive Organic Thin Films in the Light of Bound Electromagnetic Waves Z. Sekkat and W. Knoll Elementary Photoprocesses in Designed Chromophore Sequences on alpha–Helical Polypeptides M. Sisido The Photochemistry of Indoles A. Weedon