Hierarchical Self-Assembly of Donor–Acceptor- Substituted Butadiene Amphiphiles into Photoresponsive Vesicles and Gels By courtesy of: N. S. Saleesh Kumar, Shinto Varghese, Gopinathan Narayan, and Suresh Das Angew. Chem. Int. Ed. 2006, 45, 6317–6321