J.Am.Chem.Soc.2001,123,12232-12237 Photochromic Atropisomer Generation and Conformation Determination in a Ruthenium Bis(bipyridine)Phosphonite y-Cyclodextrin System Dusan Hesek, Guy A. Hembury, Michael G. B. Drew, Victor V. Borovkov, and Yoshihisa Inoue*t