Tetra phenyl-porphyrin

Checcoli, P. et al., Tetra-phenyl porphyrin based thin film transistors, Synth. Met. 138... 

Figure 11. ModiflcaHonofEPRsigfials by water and oxygen. A. Reduction oj signal intensity in extruded commeal by water. Lower spectrum sample dried under vacuum. Schcdtd, unpublished B. Loss of hyperflne structure when spectral lines in Zn tetra-phenyl porphyrin are broadened by oxygen. Adapted with permission from (5), copyright Academic, 1976.

Care must be taken in order to have diluted solutions of the compounds and the reference optically matched at the laser excitation wavelength. Typically, we should have standards to obtain the value for the three available wavelengths of a Nd YAG laser 266, 355 and 532 nm. Optical parametric amplifiers can be used to tune other wavelengths, but these are not always available and always reduce the laser intensity reaching the sample. Therefore, the i values are generally determined using as standards naphthalene in ethanol (sj = 24,500 mol dm cm at 415 nm, ( t = 0.8) when the laser excitation is with the fourth harmonic (2ex = 266 nm) of a Nd YAG, benzophenone in benzene (ex — 7,220 mol dm cm at 530 nm, = 1) with Aex — 355 nm and tetra-phenyl-porphyrin in toluene (ej = 6,000 mol dm cm at 790 nm, (pj — 0.82) for 2ex = 532 nm [2, 15]. 

Sulfadimethoxine (SMD) is a dmg frequently used to prevent the spreading of diseases in freshwater fish aquaculture, but its control is important to avoid environmental contamination. A potentiometric sensor selective to SMD was built inside a micropipette tip [211] by immersing a PVC membrane loaded with 1 % of meTO-tetra(phenyl)porphyrinate manganese(lll) chloride in a reference solution. This electrode gave near Nemstian response (54.1 mV/decade) and excellent detection limit (2.4 x 10 mol L ) was attained. For the quantification of SO2, a selective electrode was prepared by incorporation of Cio-(tetraphenyl)porphyr-inate zinc(ll) in a PVC membrane plasticized with 2-nitrophenyl-phenylether [212]. The new electrode presented a selective response to sulphite, with good linearity in an interval larger than four decades of concentration and slope of -59.5 mV per decade, and detection limit of 3.7 x 10 mol L . This sensor presented high... 

The first synthesis of amphiphilic porphyrin molecules involved replacement of the phenyl rings in TPP with pyridine rings, quaternized with C2QH 2Br to produce tetra(3-eicosylpyridinium)porphyrin bromide (3) (36). The pyridinium nitrogen is highly hydrophilic the long C2Q hydrocarbon serves as the hydrophobic part. Tetra[4-oxy(2-docosanoic acid)]phenyl-porphyrin (4) has also been used for films (37). 

The reduction electrochemistry of ECP porphyrin films furthermore responds to added axial ligands in the expected ways. We have tested this (2,6) for the ECP form of the iron complex of tetra(o-amino)phenyl)porphyrin by adding chloride and various nitrogeneous bases to the contacting solutions, observing the Fe(III/II) wave shift to expected potentials based on the monomer behavior in solution. This is additional evidence that the essential porphyrin structure is preserved during the oxidation of the monomer and its incorporation into a polymeric film. 

R (TRP) meso-Tetra(para-subst.-phenyl)-porphyrin... 

Fig. 6. Molecular structures of selected Group 14 organometallic porphyrin complexes (a) Si(TPP)(C6H5)2, (b) Si(TPP)(CH2SiMe3)2, (c) cis-SnCTBPPKCeHjlz (TBPP = tetra(4- Bu-phenyl)porphyrin), (d) rranr-Sn(TPP)(C6H5)2, (e) Sn(OEC)(C6H5)." ...

The carotenoids, trans-3 carotene (Sigma), I canthaxanthin (Fluka), II 3-8 -apocarotenal (Fluka), III and crocetin (Sigma), IV were used in this study (see structure). Of the above four carotenoids, only crocetin is water soluble. The porphyrins 5,10,15,20-tetra-phenyl-21H,23H-porphine (TPP) and 5,10,15,20-tetra-(4-sodiumsulfonato-phenyl)-21H,23H-porphine, TPPS were obtained from Aldrich, TPPS is a water soluble porphyrin. Carotenoids I-III were used as supplied, however crocetin was purified according to published methods (15) just prior to use. 

Crusats, J., Claret, J., Di ez-Perez, I., et al. (2003). Chiral shape and enantioselective growth of colloidal particles of self-assembled meso-tetra(phenyl and 4-sulfonatophenyl)porphyrins. Chem. Commun., 13, 1588-9. 

Figure 9 shows the results obtained by Sandstede 16) with tetra-(p-methoxy-phenyl)porphyrins on activated carbon in suspension. The activity decreases in the order Co > Fe > Ni Cu. The same sequence of central atoms is observed with tetra-aza-annulene. 

Parameter Copper tetra-phenylporphin Copper tetra-phenyl(pival-amido) porphin Tetramethyl ether of copper hemato-IX porphyrin... 

Ru(bipy)i Ru(II)-tris-2,2,bipyridiyne Ru(phen) Ru(II)-tris-l,10-phenanthroline Ru(dpp) Ru(II)-tris(4,7-diphenyl)-l,10-phenanthroline PtOEP platinum(II)-octaethylporphyrin PdOEP palladium(II)-octaethylporphyrin PdTPFFP palladium(II)-tetra(pentafluoro-phenyl)porphyrin L 2,4,7,9-tetraphenyl-l,10-phenanthroline py pyridine MP 3-methyl-pentane... 

TsPP Tetra(/ -sulphonic acid) phenyl porphyrin... 

Zinc tetramethylpyridilporphyrin tetraiodide was prepared by refluxing in water the free base meso-tetra (4-N-methylpyridine) porphyrin tetraiodide (Strem Chemicals) with finely divided zinc oxide (Hermann et al., 1978). An identical procedure was used to obtain zinc tetrasulphonate phenylporphyrin from the free base tetrasodium-meso-tetra (4-sulphonate-phenyl) porphyrin (12 hydrate) (Strem Chemicals). The purity of these porphyrins was checked by comparing the absorption spectra of the metallated porphyrin with those of the free base. 

Also synthetic porphyrins were used for polymer attachment. The easiest way for synthetic porphyrins is the reaction between pyrrol and benzaldehyde to ms-tetra-phenyl-porphine (9 a). Substituted porphines (9c-e) are prepared from substituted benzaldehy-des. Porous crosslinked polystyrene resins were used in the reaction with (9c-e) as shown in Eq. 13 to get the polymers (29)-(31) containing 2-6% porphines in covalent bond ... 

Metal-ligand modes were identified by resonance Raman spectroscopy, and assigned after a normal coordinate analysis, for Mn2(0)(0Ac)2(bipy)2 (H20)2.24° Resonance Raman spectra of MnN(P), where P = a range of porphyrins, included vMn=N near 1050 cm-1.241 The IR spectra of Min(P)Cl, Mn(P), where M111 = Mn, Fe Mn = Co, Ni, Cu, Zn, P = meso-tetra-(4-myristyloxy-phenyl)porphyrin, included vMnN (coupled with a porphyrin deformation mode) at 250 cm 1, and vMninCl 320 cm 1.242... 

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