Dramatic changes in the excited-state behaviour of the green fluorescent protein chromophore by a strong π-donating group through significantly lowering the excited-state potential energy surface with photoinduced intramolecular charge transfer. Issue 4 (15th January 2020) - Chen, Yi-Hui
Abstract : A strong π-donating group like p -NMe2 significantly lowers the S1 excited-state potential energy surface of green fluorescent protein chromophore by photoinduced intramolecular charge transfer, dramatically changing its excited-state behavior. Abstract : A strong π-donating group like p -NMe2 dramatically changes the excited-state behavior of the green fluorescent protein (GFP) chromophore, such as realizing charge-transfer absorption and executing significant photoinduced intramolecular charge transfer (ICT), which makes a planar first singlet (S1 ) excited-state minimum disappear and significantly lowers the S1 excited-state potential energy surface (PES), leading to barrierless τ -torsion and φ -torsion excited-state relaxation and eliciting the φ -torsion S1 excited-state minimum. This finding is critical since a strong π-donating group like p -NMe2 may do the same things to other fluorophores.