Intramolecular hydrogen bonding and excited state proton transfer in hydroxyanthraquinones as studied by electronic spectra, resonance Raman scattering, and transform analysis

1998 ◽  
Vol 108 (2) ◽  
pp. 534-549 ◽  
Author(s):  
Mario P. Marzocchi ◽  
Anna R. Mantini ◽  
Maurizio Casu ◽  
Giulietta Smulevich
Keyword(s):  
Hydrogen Bonding ◽  
Excited State ◽  
Raman Scattering ◽  
Proton Transfer ◽  
Electronic Spectra ◽  
Resonance Raman ◽  
Intramolecular Hydrogen Bonding ◽  
Resonance Raman Scattering ◽  
Excited State Proton Transfer ◽  
Intramolecular Hydrogen

Infrared absorption and resonance Raman scattering of photochromic triphenylformazans

1983 ◽  
Vol 61 (5) ◽  
pp. 809-816 ◽  
Author(s):  
J. W. Lewis ◽  
C. Sandorfy
Keyword(s):  
Excited State ◽  
Raman Scattering ◽  
Proton Transfer ◽  
Raman Spectra ◽  
Infrared Absorption ◽  
Resonance Raman ◽  
Tautomeric Equilibrium ◽  
Resonance Raman Scattering ◽  
Excited State Proton Transfer ◽  
Resonance Raman Spectra

The infrared and resonance Raman spectra of the two long-lived forms of triphenylformazan and several of its derivatives have been examined. The spectra of unsymmetrically 15N-labelled derivatives suggest that two tautomers exist for each of the two forms. This observation is confirmed by the spectra of 1-(p-halophenyl)-3,5-diphenylformazans. The spectra of the non-chelate forms of these latter compounds demonstrate that the position of the tautomeric equilibrium is influenced by the electron-attracting ability of the para-halo-substituent. A comparison of the resonance Raman spectra of the two forms leads to the conclusion that excited state proton transfer is the initial photoevent in the photochromism of the triphenylformazans.

scholarly journals Investigation of the intramolecular hydrogen bonding interactions and excited state proton transfer mechanism for both Br-BTN and CN-BTN systems

RSC Advances ◽  
2019 ◽  
Vol 9 (40) ◽  
pp. 23004-23011 ◽  
Author(s):  
Dapeng Yang ◽  
Qiaoli Zhang ◽  
Xiaoyan Song ◽  
Tianjie Zhang
Keyword(s):  
Hydrogen Bonding ◽  
Excited State ◽  
Proton Transfer ◽  
Intramolecular Hydrogen Bonding ◽  
Transfer Mechanism ◽  
Hydrogen Bonding Interactions ◽  
Excited State Proton Transfer ◽  
Intramolecular Hydrogen

In the present work, two novel Br-BTN and CN-BTN compounds have been investigated theoretically.

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