Ab initio study of the intramolecular proton transfer in dihydroxyanthraquinones

2001 ◽  
Vol 542 (1-3) ◽  
pp. 63-77 ◽  
Author(s):  
M.L Ferreiro ◽  
J Rodrı́guez-Otero
Keyword(s):  
Proton Transfer ◽  
Ab Initio ◽  
Intramolecular Proton Transfer ◽  
Ab Initio Study

Excited state intramolecular proton transfer in julolidine derivatives: an ab initio study

2018 ◽  
Vol 20 (38) ◽  
pp. 25031-25038 ◽  
Author(s):  
Šimon Budzák ◽  
Denis Jacquemin
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Ab Initio ◽  
Intramolecular Proton Transfer ◽  
Substitution Effects ◽  
Ab Initio Study

We have studied, using ab initio tools, a series of fluorescent julolidine derivatives, undergoing Excited State Intramolecular Proton Transfer (ESIPT) and some unexpected substitution effects have been found.

An ab initio study of the structure and intramolecular proton transfer in tropolone

1991 ◽  
Vol 69 (2) ◽  
pp. 201-204 ◽  
Author(s):  
Miguel A. Ríos ◽  
Jesús Rodríguez
Keyword(s):  
Proton Transfer ◽  
Ab Initio ◽  
Ground State ◽  
Vibrational State ◽  
Intramolecular Proton Transfer ◽  
Ab Initio Study ◽  
Proton Tunneling ◽  
Full Optimization ◽  
Minimum Potential ◽  
Intramolecular Hydrogen

An ab initio study of tropolone was carried out at the 3-21G level, with full optimization of the geometry, and the intramolecular proton transfer in the ground state was analysed. The two equivalent Cs structures can be converted to each other via a C2v symmetry transition state with a double minimum potential. The splitting of the ground vibrational state generated by proton tunneling was determined by procedures of variable complexity and found to be in the range Δ = 0.1–0.15 cm−1, i.e., clearly smaller than experimental predictions. Key words: tropolone, intramolecular hydrogen bond, proton transfer, ab initio calculations, molecular structure.

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