Charge displacement analysis

The above results confirm the direct proportionality between the electrostatic component of the CB shift and the electrostatic potential generated by the sensitizer. We now move to discuss the relation between the residual CB shift (ACBtot ACBel) and the CT amount predicted by the charge displacement analysis along the series of dye-Ti02 systems. This is displayed in Fig. 39, which shows beyond doubt a surprisingly accurate linear correlation between the two computed quantities (/ =1.00). 

Bistoni G, Belpassi L, Tarantelli F, Pirani F, Cappelletti D (2011) Charge-displacement analysis of the interaction in the ammonia-noble gas complexes. J Phys Chem A 115(51) 14657-14666. doi 10.1021/jp208859x... 

One concludes from this analysis that the rigid IDM provide an adequate reference frame for describing both external and internal CT processes in a reasonably compact form. However, carrying no information whatever about the reactant interaction, they are - by definition - one-reactant concepts, and therefore may not constitute the optimum collective charge displacement coordinates for reactive systems. In Sections 5.2 and 5.3 we extend this search into... 

Indirect UV detection is a common technique which has been applied to the analysis of cations and anions. A UV-absorbing anion plus an electroos-motic flow modifier is added to the electrolyte. The displacement chromophore permits indirect photometric detection. Optimum separations can be achieved by choosing an electrolyte anion which has a mobility similar to the ions of interest. Some investigators have used conductivity detection, while others have used indirect laser-induced fluorescence for anion detection. Detection of the nonfluorescence analyte is obtained by charge displacement of the fluorophore (339,340). 

Seki A, Kubo I, Sasabe H and Tomioka H 1994 A new anion-sensitive biosensor using an ion-sensitive field effect transistor and a light-driven chloride pump, halorhodopsin Appl. Biochem. Biotechnol. 48 205-11 Fuller B E, Okajima T L and Hong F T 1995 Analysis of the d.c. photoelectric signal from model bacteriorhodopsin membranes d.c. photoconductivity determination by means of the null current method and the effect of proton ionophores Bioelectrochem. Bioenerget. 37 109-24 Cone R A 1967 Early receptor potential photoreversible charge displacement in rhodopsin Science 155 1128-31... 

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