Linear‐to‐Turn Conformational Switching Induced by Deprotonation of Unsymmetrically Linked Phenolic Oligoamides

Wagging motion of hydrogen-bonded wire in the excited-state multiple proton transfer process of 7-hydroxyquinoline·(NH3)3 cluster

“…Therefore, the nature of hydrogen bond in solution is of particular interest and has been investigated extensively by various experimental and theoretical methods [6][7][8][9][10][11]. However, little is known about electronic excited-state hydrogen bond, because the structure and dynamics of which are difficult to analyze for both theoretical and experimental studies.…”

Excited-state hydrogen bonding effect on dynamic fluorescence of coumarin 102 chromophore in solution: A time-resolved fluorescence and theoretical study

“…Intermolecular hydrogen bond is a site-specific interaction between hydrogen donor and acceptor molecules, and it plays a key role in protic liquids such as water or alcohols and in the tertiary structure of proteins [1][2][3][4][5][6][7][8][9][10]. Therefore, the nature of hydrogen bond in solution is of particular interest and has been investigated extensively by various experimental and theoretical methods, since solute-solvent interactions play a fundamental role in molecular nonequilibrium processes in liquids [11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Excited-State Proton Transfer via Hydrogen-Bonded Acetic Acid (AcOH) Wire for 6-Hydroxyquinoline

“…[1][2][3][4] As the important role of hydrogen bonds playing in physics, chemistry, and biology has been recognized, [5][6][7][8][9][10][11][12][13][14][15][16][17][18] the proton transfer along hydrogen bonding has been given more and more attention in recent years. [19][20][21][22][23][24][25] This is especially true for photoacids, where a well-defined zero-point of time for the proton-transfer reaction due to the acidity of photoacids can be switched by optical excitation. 24,25 Thus, monitoring the hydrogen release of photoacids is the fashionable method to study proton transfer.…”

“…24,25 Thus, monitoring the hydrogen release of photoacids is the fashionable method to study proton transfer. [20][21][22][23][24][25] The proton exchange between an acid and a base in aqueous solution is detected to proceed by a sequential, von Grotthusstype, proton-hopping mechanism through water bridges. [23][24][25] Furthermore, a mechanism of an excited-state H-atom-transfer reaction along a hydrogen-bonded "wire" has also been proposed and widely studied for the importance in photochemical [26][27][28][29][30][31] and biological [32][33][34][35] processes.…”