Synthesis, crystal structure and DFT studies of a dual fluorescent ketamine: Structural changes in the ground and excited states

Theoretical study on an intriguing excited-state proton transfer process induced by weakened intramolecular hydrogen bonds

“…20 Recently, a novel fluorescent probe 2Z,2 0 Z-3,3 0 -(4,4 0 -methylenebis(4,1-phenylene)bis(azanediyl)bis(1,3-diphenylprop-2-en-1-one)) (L) was synthesized and characterized by steady state UV-visible absorption spectroscopy, 1 H NMR spectroscopy, and single-crystal X-ray crystallography. 21 It was reported that the intramolecular double proton transfer behavior of L had occurred smoothly in the excited state. Nevertheless, whether the double proton transfer was carried out step by step or simultaneously is still up in the air and not mentioned experimentally.…”