Tetraphenylporphyrinato zinc

A further interesting application of CLM involves the fluorescence quenching reaction between (5,10,15,20-tetraphenylporphyrinato) zinc (II) and methylviologen at a dode-cane-water interface. [62] This study demonstrated that the quenching reaction could occur only in the presence of an anionic surfactant, sodium dodecyl sulfate (SDS). The quenching efficiency depended on the concentration of SDS in the aqueous phase with a maximum value of 13.5%... 

DCE)-Fe(CN)6 " (W) system, and then claimed that the Marcus theory can be used to predict the rate constants. Recently, Bard s group [18,21] reported that the rate constants ki2(= k) for the heterogeneous ETs between ZnPor+ (the oxidized form of 5,10,15,20-tetraphenylporphyrinato zinc(II)) and various aqueous leductants, being determined by means of SECM, showed the driving-force (AG°) depradence in accordance with the Marcus theory. Figure 8.10 shows the plot of log ki2 against A /2(= — Aq< -I- = —AG°lnF) for three O/W systems [21]. It is expected... 

H. Nagatani and H. Watarai, Direct spectrophotometric measurement of demetallation kinetics of tetraphenylporphyrinato zinc(II) at the liquid-liquid interface by a centrifugal liquid membrane method. Anal. Chem., 70, 2860-2865 (1998). 

HGURE 8.1. Formal potentials of redox species in W, NB and DCE versus NHE. Abbreviations ZnTMPyP = zinc tetra-7V-methyl-4-pyridium porphyrin, DcMFc = decamethylfetrocene, TCNQ = 7,7,8,8-tetracyanoquinodimethane, DiMFc = dimethylferrocene, Fc = ferrocene, RuTPP(py)2 = bisfpyridine) meso-tetraphenylporphyrinato ruthenium(II), SnPc2 = tin(IV) diphthalocyanine, LuPc2 = lutetium(in) di]dithalo-cyanine, DiFcET = diferrocenylethane, TAA = tris(4-methoxyphenyl)amine, TPB = tetraphenylborate, TBrPA = tris(4-bromophenyl)amine, TCIPB = tetrakis(4-chlorophenyl)borate. The data is from Ref. [26], except where otherwise noted Ref. [6], Ref. [29], Ref. [30], Ref. [31], Ref. [32]. Reprinted from Ref. [28], with permission from the Polarographic Society of Japan. 

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