Effects of Quenchers

Tomin VI, Rubinov AN, Voronin VF (1973) An effect of quenchers on fluorescence spectra of polar dye solutions. Opt Spectros 34 1108-1111... 

Effect of Quenchers. The photocross I inking of XVIII in the presence of 0.007 M TCPA is quenched completely by 0.010 M tri-ethylamine or even by 0.005 M triethylamine (air and adventitious H2O were present in the latter run). This is believed to be good evidence that the propagating species is cationic rather than radical. These samples also do not postlink when 0.5 M H2O is added. 

Figure 7a. Effect of quenchers on the CdS emission intensity. CdS/SDS colloid Stern-Volmer plots for quenching by MV +...

Effects of Quenchers. The cis trans photoisomerization of 1,2-diarylethylenes can be influenced by properties of the medium, nature of the sensitizer (Section III), and also several additives acting as quenchers [192-202], The effect of quenchers on the quantum yields and the photo-stationary trans/cis ratio has been used as a mechanistic probe for exploration of isomerization pathways. Since quenching can occur with singlet as well as with triplet states, measurements on various systems have been performed under direct and sensitized excitation conditions. 

The effects of quenchers are also incorporated into PEB models. When present in a resist film, the quencher can neutralize the photoacid in a typical acid-base... 

In this chapter we describe more advanced topics in quenching. Quenching in membranes is desoibed in some detail because of the numerous applications. These include localization of membrane-bound probes, estimation of diffusion coefficients in membranes, and the effect of quencher partitioning into membranes. We also describe transient effects in quenching, which result in nonexponential decays whenever diffusive quenching occurs. These effects can complicate the interpretation of the time-resolved data, but they also provide additional information about the diffusion coefficient of die quencher, the interaction radius, and the medianism of quendiing. For those interested in an introduction to fluorescence, the reading of this chi ter can be postponed. 

Effects of quencher concentration on fluorescence lifetime and intensity... 

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