Zinc, tetra

FIG. 4 (a) Latimer diagram of the water soluble zinc tetra-Af-methyl-4-pyridium porphyrin (ZnTMPyP ). (Reprinted with permission from Ref. 47.) (b) Schematic representation of a photosynthetic process based on porphyrin sensitized water-organic interface. Dotted line corresponds to the back electron-transfer process. (Reprinted from Ref. 51 with permission from Elsevier Science.)... 

Metallooctaethylporphyrins Zinc tetra(benzo-15-crown-5)porphyrin See also Metallotetraphenylporphrins dimerization effects, 141,147 Zinc tetrabenzoporphyrin—See Metalloporphyrins Zinc tetraphenylporphyrin See also Metalloporphyrins See also... 

The structure determination of bis(5,5 -diethylbarbiturato)bis(picoline)zinc shows zinc tetra-hedrally bonded to the deprotonated nitrogen atoms of the barbital anions (Zn—N = 1.99, 2.01 A) and to the nitrogen atoms of the picoline ligands (Zn—N = 2.07, 2.10 A). The molecules are linked by N—H O hydrogen bonds.577... 

Zinc naphthalocyanine has been prepared in low yield (18%) by the template reaction of Zn(02CMe)2, urea and 2,3-naphthalenedicarboxylic acid.1138 The synthesis of zinc tetra-2,3-naphthoporphine by a template reaction has been described.1139... 

The electrochemical oxidation of zinc tetra-4-f-butylphthalocyanine (l< 7b) in nitrobenzene or 1,2-dichlorobenzene has been reported.1186... 

CLM method can also be combined with various kinds of spectroscopic methods. Fluorescence lifetime of an interfacially adsorbed zinc-tetra-phenylporphyrin complex was observed by a nanosecond time-resolved laser induced fluorescence method [25]. Microscopic resonance Raman spectrometry was also combined with the CLM. This combination was highly advantageous to measure the concentration profile at the interface and a bulk phase [14]. Furthermore, circular dichroic spectra of the liquid-liquid interface in the CLM could be measured [19]. 

Place a drop of the acid test solution upon a spot plate, add 1 drop zinc acetate (1 %) solution and 1 drop of the reagent. The precipitated zinc tetra-thiocyanatomercurate(II) is coloured violet owing to the coprecipitation of the copper complex the composition of the precipitate is approximately Zn[Hg(SCN)4], Cu[Hg(SCN)4], The addition of copper ions to a precipitate of zinc tetrathiocyanatomercurate(II), already formed, has no effect. Sensitivity 01 pg Cu2+. Concentration limit 1 in 5 x 10s. 

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. 

The following N- H NOE have also been reported in a variety of simple molecules (317a) in which it varied from rj = —5 to 0 in nucleosides and nucleotides (318) (rj = —2 to —1) in zinc tetra-phenylporphyrin (319) (17 = 6) in acetamide and A,N-dimethyl-acetamide (269) in aniline, the anilinium ion, and aminobenzoic... 

Metal clusters Mallouk and co-workers reported on procedures to generate small particles of Pt inside zeolite L channels, which they used as catalysts for hydrogen formation [154]. The electron transport chain was composed of EDTA as sacrificial electron donor, zinc tetra(A-methyl-4-pyridyl)porphyrin (ZnTMPy +) as sensitizer and methylviologen (MV +) as electron acceptor. The zeolite host used was zeolite L, which has a one-dimensional tunnel-like structure (Figure le). Small Pt clusters were formed inside the zeolite and then loaded with by ion exchange. Since... 

FIG. 4 (a) Latimer diagram of the water soluble zinc tetra-/V-methyl-4-pyridium porphyrin... 

Persaud, L., Bard, A. J., Campion, A., Fox, M. A., Mallouk, T. E., Webber, S. E., White, J. M. (1987). Photochemical hydrogen evolution via singlet-state electron-transfer quenching of zinc tetra(N-methyl-4-pyridyl)porphyrin cations in a zeolite L based system, J. Am. Chem. Soc., 109 7309. 

Dastidar, P. Stein. Z. Goldberg, L Strouse. C.E. Supramolecular assembly of functionalized metallopor-phyrins. Porous crystalline networks of zinc tetra(4-carboxyphenyllporphyrin. Supramol. Chem. 1996. 7. 257. 

Yang, M.Z., M.G. de Backer, and F.X. Sauvage (1990). Electrochemical and photoelectrochemical characterizations of electrodes covered by zinc tetra 2,3 p5uidino-porphyrazine layers. New J. Chem. 14, 273-277. 

Jensen, H., J.J. Kakkassery, H. Nagatani, D.J. Fermfn, and H.H. Girault (2000). Photoinduced electron transfer at hquid/liquid interfaces. Part IV. Orientation and reactivity of zinc tetra(4-carboxyphenyl) porphyrin self-assembled at the water/1,2-dichloroethane junction. J. Am. Chem. Soc. 122, 10943-10948. 

According to the same procedure as mentioned above, zinc tetra(4-sul-phophenyl) porphyrin (ZnTPPS) was incorporated in PPy at a ratio of 0.341 and conductivity of O.lScm was obtained. Figure 9.3 shows a typical photocurrent-potential curve of a ZnTPPS-PPy ITO electrode in water containing 2.0 mmol 1" of Fe(CN)6 " under irradiation at a wavelength... 

Very elegant approach was demonstrated recently when zinc -tetra(4-pyridyl) porphyrin molecules were assembled together with fullerene derivatives into hydrid nanorods. These nanorods demonstrate coaxial cable architecture with the central fullerene-composed n-type wire surrounded by the p-type porphyrin cladding (Figure 33). ... 

Our experiences with nitrite-ion reactions show that both nitration and oxygen-atom transfer can occur. Thus, 6 " and 10 give 2-nitrodibenzodioxin (12) and 3-nitroperylene (10) respectively according to eq. 6. The cation radical of zinc tetra-phenylporphyrin is similarly nitrated at one of the pyrrolic carbon atoms (44). The perylene reaction is so facile that it... 

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