Experimental Design for the Estimation of Photophysical Parameters of the Two-State Excited-State Proton-Exchange Reaction in the Presence of pH Buffer

2005 ◽  
Vol 109 (19) ◽  
pp. 4221-4230 ◽  
Author(s):  
Wenwu Qin ◽  
Nikola Basarić ◽  
Noël Boens
Keyword(s):  
Excited State ◽  
Experimental Design ◽  
Exchange Reaction ◽  
Proton Exchange ◽  
Photophysical Parameters ◽  
Ph Buffer

Identifiability of the Model of the Intermolecular Excited-State Proton Exchange Reaction in the Presence of pH Buffer

2004 ◽  
Vol 108 (40) ◽  
pp. 8180-8189 ◽  
Author(s):  
Noël Boens ◽  
Nikola Basarić ◽  
Eugene Novikov ◽  
Luis Crovetto ◽  
Angel Orte ◽  
...  
Keyword(s):  
Excited State ◽  
Exchange Reaction ◽  
Proton Exchange ◽  
Ph Buffer

scholarly journals Competition between excited state proton and OH− transport via a short water wire: solvent effects open the gate

2014 ◽  
Vol 16 (26) ◽  
pp. 13047-13051 ◽  
Author(s):  
Gül Bekçioğlu ◽  
Christoph Allolio ◽  
Maria Ekimova ◽  
Erik T. J. Nibbering ◽  
Daniel Sebastiani
Keyword(s):  
Excited State ◽  
Exchange Reaction ◽  
Quantum Chemical Calculations ◽  
Solvent Effects ◽  
Quantum Chemical ◽  
Proton Exchange ◽  
Acid Base

We investigate the acid–base proton exchange reaction in a microsolvated bifunctional chromophore by means of quantum chemical calculations.

Similarity between the kinetic parameters of the buffer-mediated proton exchange reaction of a xanthenic derivative in its ground- and excited-state

2010 ◽  
Vol 12 (2) ◽  
pp. 323-327 ◽  
Author(s):  
Jose M. Paredes ◽  
Angel Orte ◽  
Luis Crovetto ◽  
Jose M. Alvarez-Pez ◽  
Ramon Rios ◽  
...  
Keyword(s):  
Excited State ◽  
Kinetic Parameters ◽  
Exchange Reaction ◽  
Proton Exchange

FRUCTOSE DIPHOSPHATE ALDOLASE FROM FUSARIUM OXYSPORUM f. LYGOPERSICI: II. CHARACTERISTICS OF THE EXCHANGE REACTION

1967 ◽  
Vol 45 (10) ◽  
pp. 1505-1511 ◽  
Author(s):  
J. M. Ingram
Keyword(s):  
Methylene Blue ◽  
Fusarium Oxysporum ◽  
Exchange Reaction ◽  
Active Site ◽  
Reaction Rates ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Dihydroxyacetone Phosphate ◽  
Cleavage Reaction ◽  
Twofold Decrease

Fruetose-1,6-diphosphate aldolase purified from extracts of Fusarium oxysporum f. lycopersici was examined in detail. The different pH optima obtained for the proton exchange (pH 6.0) and cleavage (pH 7.5) reactions indicate that this enzyme resembles the yeast FDP-aldolase rather than the aldolase from muscle. When the enzyme was dialyzed extensively, in the absence of Cleland's reagent, it was found that neither the cleavage nor the exchange reaction rates were increased appreciably after addition of mercaptan. Treatment of the enzyme with either methylene blue in the presence of light or with diazosulfanilic acid, two known inhibitors of the cleavage reaction, resulted in almost complete inhibition of FDP cleavage but only a twofold decrease in the exchange capacity. These results substantiate our previous findings that the inhibitors react with residues involved in the D-glyceraldehyde-3-phosphate rather than the dihydroxyacetone phosphate active site.

An Investigation of the Accuracy of Different DFT Functionals on the Water Exchange Reaction in Hydrated Uranyl(VI) in the Ground State and the First Excited State

2008 ◽  
Vol 4 (4) ◽  
pp. 569-577 ◽  
Author(s):  
Pernilla Wåhlin ◽  
Cécile Danilo ◽  
Valérie Vallet ◽  
Florent Réal ◽  
Jean-Pierre Flament ◽  
...  
Keyword(s):  
Excited State ◽  
Exchange Reaction ◽  
Ground State ◽  
Water Exchange ◽  
First Excited State

Photophysics of some substituted 3H-indole probe molecules and their charged species

1994 ◽  
Vol 72 (11) ◽  
pp. 2239-2248 ◽  
Author(s):  
Michel Belletête ◽  
Ranjit S. Sarpal ◽  
Gilles Durocher
Keyword(s):  
Excited State ◽  
Radiative Decay ◽  
Mirror Image ◽  
Good Tool ◽  
Decay Rate Constant ◽  
Solvent Interactions ◽  
Cationic Species ◽  
Photophysical Parameters ◽  
Ring Nitrogen ◽  
Ring Nitrogen Atom

The spectroscopic and photophysical parameters of neutral and cationic species of the following molecules have been discussed: 2-phenyl-3,3-dimethyl-3H-indole (1), 2-[(p-amino)phenyl]-3,3-dimethyl-3H-indole (2), 2-[(p-dimethylamino)phenyl]-3,3-dimethyl-3H-indole (3), 2-[(p-amino)phenyl]-3,3-dimethyl-5-carboethoxy-3H-indole (4), 2-[(p-methylamino)phenyl]-3,3-dimethyl-5-carboethoxy-3H-indole (5), 2-[(p-dimethylamino)phenyl]-3,3-dimethyl-5-carboethoxy-3H-indole (6). Solvatochromic shifts have been interpreted in terms of the nature of the substituent groups and the state of solute–solvent interactions and complexation. The theoretical radiative decay rate constant [Formula: see text] along with the bandwidth of the absorption profile of the different species involved have been used to discuss the geometrical changes from one species to the other in the ground state. The mirror-image relationship between absorption and fluorescence spectra has proven to be a good tool to discuss any geometrical changes occurring in the excited state. A radiationless torsional mechanism takes place in the excited state relaxation of the various species. The protonation of the ring nitrogen atom generates a highly planar cationic species which retains its conformation in the relaxed excited state. The very effective quenching of the monocation fluorescence is interpreted by the formation of a non-emissive TICT state.

The proton exchange reaction between indene and the indenyl anion

1974 ◽  
Vol 6 (11) ◽  
pp. 574-576 ◽  
Author(s):  
H. W. Vos ◽  
Y. W. Bakker ◽  
N. H. Velthorst ◽  
C. Maclean
Keyword(s):  
Exchange Reaction ◽  
Proton Exchange
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