Excited-State Proton Transfer in syn-2-(2′-Pyridyl)pyrrole Occurs on the Nanosecond Time Scale in the Gas Phase

2011 ◽  
Vol 2 (17) ◽  
pp. 2114-2117 ◽  
Author(s):  
Philip J. Morgan ◽  
Adam J. Fleisher ◽  
Vanesa Vaquero-Vara ◽  
David W. Pratt ◽  
Randolph P. Thummel ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Gas Phase ◽  
Time Scale ◽  
Nanosecond Time Scale ◽  
Excited State Proton Transfer

Excited‐state proton transfer in gas‐phase clusters: 2‐Naphthol⋅(NH3)n

1990 ◽  
Vol 93 (7) ◽  
pp. 4520-4532 ◽  
Author(s):  
Thierry Droz ◽  
Richard Knochenmuss ◽  
Samuel Leutwyler
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Gas Phase ◽  
Gas Phase Clusters ◽  
Excited State Proton Transfer

Excited state proton transfer in 2′-hydroxychalcone derivatives

2017 ◽  
Vol 19 (3) ◽  
pp. 2409-2416 ◽  
Author(s):  
Michael Dommett ◽  
Rachel Crespo-Otero
Keyword(s):  
Excited State ◽  
Solid State ◽  
Proton Transfer ◽  
Gas Phase ◽  
Theoretical Investigation ◽  
Excited State Proton Transfer

ESIPT-active solid-state emitters based on 2-hydroxychalcone are almost non-emissive in solution but emit in the deep red/NIR region when crystalline. A comprehensive theoretical investigation of the gas-phase excited state relaxation pathways in five 2-hydroxychalcone systems is presented, using a combination of static and non-adiabatic simulations.

Ultrafast Excited-State Proton Transfer to the Solvent Occurs on a Hundred-Femtosecond Time-Scale

2013 ◽  
Vol 117 (16) ◽  
pp. 3405-3413 ◽  
Author(s):  
Ron Simkovitch ◽  
Naama Karton-Lifshin ◽  
Shay Shomer ◽  
Doron Shabat ◽  
Dan Huppert
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Time Scale ◽  
Excited State Proton Transfer ◽  
Femtosecond Time Scale

Sibling rivalry: intrinsic luminescence from two xanthene dye monoanions, resorufin and fluorescein, provides evidence for excited-state proton transfer in the latter

2017 ◽  
Vol 19 (36) ◽  
pp. 24440-24444 ◽  
Author(s):  
Christina Kjær ◽  
Steen Brøndsted Nielsen ◽  
Mark H. Stockett
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Gas Phase ◽  
Emission Band ◽  
Stokes Shift ◽  
Sibling Rivalry ◽  
Core Structure ◽  
Intrinsic Luminescence ◽  
Large Stokes Shift ◽  
Excited State Proton Transfer

Excited-state proton transfer in gas-phase fluorescein monoanions results in a broad, featureless emission band and a large Stokes shift compared to resorufin, which shares the same xanthene core structure.

scholarly journals Caught in the act: Observation of the solvent response triggered by excited-state proton transfer in real time

2021 ◽  
Author(s):  
Claudius Hoberg ◽  
Thorsten Ockelmann ◽  
James Shee ◽  
Patrick Balzerowski ◽  
Debasish DasMahanta ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Real Time ◽  
Time Scale ◽  
Stokes Shift ◽  
Transfer Energy ◽  
Optical Pump ◽  
Excited State Proton Transfer ◽  
Electronic Response ◽  
Time Observation

Real-time observation of the solvent response following Excited State Proton Transfer (ESPT) of the photoacid HPTS into water using Optical Pump THz Probe (OPTP) spectroscopy from 0.1 ps up to 300 ps is reported. Subsequent to an instantaneous (< 0.2 ps) electronic response of the solute to photoexcitation, an oscillation with a period of 4 ps involving an intermolecular H (pyranine) - O (water) mode is observed. While for the methylated derivative, MPTS, and the deprotonated photoacid this oscillation relaxes on a time scale of 1.5 – 2 ps, for HPTS the oscillation decays more rapidly within 0.4 ps, which marks the onset of proton transfer. Energy transfer from the excited solute to the solvent takes place on a time scale of 120 ps and is proportional to the Stokes shift associated with energetic relaxation from the Franck-Condon region to the ground state of the photoexcited HPTS.

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