Bipyridyls bis

Bipyridyl,4-methyl-4 -vinyl-electrochemical polymerization, 6,25 electropolymerization, 6,16 Bipyridyls bis(ZV-oxide) metal complexes, 2, 496 metai complexes, 2, 89, 90,93 steric effects, 2, 90 2,2 -Biquinolyl... 

JV-Oxalylglycine 2,4-PDCA Bipyridyl-bis-carboxylic acid /V-Oxalyltyrosine derivative... 

Bipyridine A A -dioxide-dicarbonylrhodium(I) perchlorate, 3454 4,4/-Bipyridyl-bis(pentaammineruthenium(III) perchlorate), 3385 2,2/-Bipyridyldichloropalladium(IV) perchlorate, 3255 Bis(2-aminoethyl)aminesilver nitrate, 1773... 

Quinoline(V-oxide (QuinNO) (13) Bipyridyl bis-Ai -oxide (bipy2NO)... 

Heteroditopic ruthenium(n) and rhenium(l) bipyridyl bis(benzo-15-crown-5) ion-pair receptors 19 and 20 display, upon K+ complexation, a remarkable switch in anion selectivity <1998CC825>. In the absence of K+, receptors 19 and 20 exhibit a selectivity preference for II2PO4 over CP. However, addition of KPF6 caused in both cases, the formation of a sandwich K+ complex, which shows a reversed CP over H2POP binding selectivity because of a more favorable electrostatic attraction between K+- and CP-bound ions (positive binding cooperativity). 

C12Hl4Cl4N2NiSi2 Nickel 2,2 -Bipyridyl-bis-[dichIor-methyl-silyl]- XIII/5, 285... 

A new probe of solvent accessibility of bound sensitizers has been described and tested for the particular case of a series of Ru" and Os photosensitizers bound to sodium lauryl sulphate micelles. The method depends upon the large solvent deuterium effect on excited-state lifetimes, and a correlation has been established between accessibility of bound complexes and hydrophobicity of the ligands. Luminescence properties of amphiphilic annelide-type complexes of ruthenium in micellar phases have been described. In the case of [4,4 -bis(nonadecyl)-2,2 -bipyridyl]bis-[4,4 -di-(10,13,16-trioxaundecyl)-2,2 -bipyridyl]ruthenium dichloride, intramicellar self-quenching effects have an influence on the excited-state lifetime, and the mechanism of self-quenching has been determined. Deactivation of [Ru(bipy)3] by [Co(EDTA)] has been studied in a micellar environment and found to occur by electron transfer at diffusion-controlled rates a stereoselective effect has been observed. ... 

Ruthenium, (4,4 -bipyridyl)bis(pentaammine)-equilibrium constant solvent effect, 516 Ruthenium(ll) complexes magnetic behavior, 273 polymerization electrochemistry, 488 reactivity, 300 spectra, 254... 

Figure 16 An example of C-H- - -7r(chelate) interaction operating in a crystal structure, (a) Chemical structure of (2,2 -bipyridyl) bis[0-(2-methoxyethyi)dithiocarbonato] cadmium (II) and (b) supramolecular 2-D architecture based on C-H-- -7r (CdS2C) interactions (purple dashed lines).

The two ends of the bipyridyl-bis-crown ether ligand LI 154 can be clipped together by K+. Reaction of [Cu(MeCN)4]+ with two equivalents of LI 154 gave the precursor [Cu(Ll 154)2]+, which with an excess of KPFe gave the novel alkali-metallated catenate [Cu(KL1154)2](PF6)3. The potassium binds the benzo-15-crown-5 units sufficiently tightly for demetallation, with potassium or tetramethy-lammonium cyanide, to be feasible, giving the [2]-catenane (KL 1154)2 as its hexafluorophosphate salt [299] (Scheme 4-32),... 

ClbHi2N2PbS2, Lead 8-mercaptoquinolate, 37B, 631 Ci8Hii,F5N20i,Sn, (2,2 -Bipyridyl) bis (tr if luoroacetato) divinyl tin,... 

H8MoN20eS2, Dicarbonyl(2,2 -bipyridyl)bis(77 -sulfur dioxide)mo-lybdenum(O), 46B, 1075... 

C26H32B4FeNioNi20e CioHbN2, (m"4,4 Bipyridyl)bis(bis(difluoro-borondimethylglyoximato)nickel(II)) 4,4 -bipyridine solvate, 46B,... 

C3 i,H2 2Cu2Ng08 4 H2O, Bis(2,2 -bipyridyl)-bis(pyridine-2,6-dicarb-oxylato)dicopper (II) tetrahydrate, 46B, 1173 C3 H26Ni,Ni02, Bis-(1 -m-tolylazo-2-naphtholato)nickel (II), 33B, 450 C3i,H3oFgNi,Ni20g, Bis(1,1,1-trifluoroheptane-2,4,6-trionato)tetrakis-(pyridine)dinickel(II), 46B, 1151... 

In the present work, the interfacial behavior of cytochrome c at a silver electrode in the presence of both 4-isomers and 2-isomers of pyridine derivatives are investigated by using voltammetric and SERS techniques. The 4-isomers used are 4,4 -bipyridyl, bis(4-pyridyl) disulfide, and 1,2-bis(4-pyridyl)ethylene and the 2-isomers are 2,2 -bipyridyl, bis(2-pyridyl) disulfide, and 1,2-bis(2-pyridyl) ethylene. 

Modified electrodes for biocatalysis use either electron mediators or promoters immobilized on the electrode surface -. In both cases, redox enzyme molecules are in solution and in contact with the common electron mediators for redox enzymes such as cytochrome c and ferredoxin. An electron promoter is not a mediator since it does not take part in electron transfer in the potential region of interest. An electrode modified with promoter molecules has enables some redox enzymes to directly transfer electrons. It has been shown that 4,4 -bipyridyl, bis(4-pyridyl)sulfide, and bis 4-pyridyl)disulfide are excellent promoters of electron transfer of cytochrome c. Cytochrome c gives a reversible cyclic voltammogram at gold electrodes modified with these promoters. 

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