Ultrafast dynamics of highly constrained azobenzene macrocycles Chavdar Slavov, Chong Yang, Luca Schweighauser, Andreas H. Heindl, Tim Stauch, Herman A. Wegner, Andreas Dreuw and Josef Wachtveitl EPJ Web Conf., 205 (2019) 09002 Published online: 16 April 2019 DOI: 10.1051/epjconf/201920509002