@Article{ChemPhysLett_487_246, author = {O.F. Mohammed and E. Vauthey}, title = {{Ultrafast excited-state dynamics of aminoperylene and of its protonated form observed by femtosecond absorption spectroscopy}}, journal= {Chem. Phys. Lett.}, ISSN = {0009-2614}, volume= {487}, number= {4-6}, pages = {246-250}, url = {http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFN-4Y95V4T-1&_user=779890&_coverDate=03%2F05%2F2010&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000043220&_version=1&_urlVersion=0&_userid=779890&md5=3f7a9053ab74ec1be8c381d37057838d}, eprint= {http://www.unige.ch/sciences/chifi/publis/refs_pdf/ref01028.pdf}, doi= {10.1016/j.cplett.2010.01.066}, abstract = {{The photophysics of aminoperylene (APe) in various solvents, including a room-temperature ionic liquid, has been investigated by steady-state and femtosecond transient absorption spectroscopies. The ultrafast excited-state dynamics originates from the solvation of the polar S$_1$ state and not from a transition from a locally-excited to a charge-transfer state, as found with perylene-dimethylaniline. Addition of acid yields the protonated form APeH$^+$, which exhibits similar photophysical properties than perylene, due to the suppression of the charge-transfer character of the S$_0${\frac{ }{ }}S$_1$ transition. However, excited-state proton transfer, resulting to the formation of APe in the S$_1$ state, is observed in methanol.}}, year = {2010} }