CONTENTS
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Junsheng Chen and A.B.P. Lever*
Page: 151-159
The electrochemical properties of self-assembled ion pairs deposited onto a graphite electrode surface are reported. They are comprised of phthalocyanine cations and anions, or a phthalocyanine cation and porphyrin anion. The order of deposition is shown to be crucial implying that these species lie down flat on the surface. A detailed study of the electrocatalytic oxidation of oxalate anion explores their reactivity as a function of deposition order.
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Takashi Saito, Noriyuki Asakura, Toshiaki Kamachi, Ichiro Okura*
Page: 160-164
Oxygen concentration imaging system inside a single living cell based on the phosphorescence lifetime under microscope was developed. Fluorescence microscope equipped with pulsed Nd:YAG laser (532 nm) and CCD camera equipped with gated imaging intensifier was used. To measure the oxygen concentration image, time dependence of phosphorescence intensity was observed under microscope.
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Mark Pluym, Christie L. Vermeiren, John Mack, David E. Heinrichs* and Martin J. Stillman*
Page: 165-171
Mass spectrometry and MCD spectroscopy analysis of the S. aureus rIsdC protein shows that it binds predominantly PPIX and to a lesser extent heme, unlike the case of rIsdA. The bound heme in rIsdC exhibits spectral properties characteristic of a high-intermediate spin ferric heme.
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Radomir Myśliborski, Krystyna Rachlewicz and Lechosław Latos-Grażyński*
Page: 172-180
Oxidation of an iron(II) complex of N-confused pyriporphyrin produced a six-coordinate organoiron(III) complex revealing 1H NMR features assigned to the less common low-spin ground electronic state (dxzdyz)4(dxy)1.
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Christian G. Claessens, David González-Rodríguez, Charles M. McCallum, Ronald S. Nohr, Heinz-Peter Schuchmann and Tomás Torres*
Page: 181-188
The mechanism of chloroboron subphthalocyanine (SubPc) formation from phthalonitrile and BCl3 in aromatic solvents such as p-xylene or toluene has been studied. Isolation of a reaction intermediate, computational chemistry as well as photochemical measurements led to a plausible mechanistic proposal.
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Karn Sorasaenee, Pouyan Taqavi, Lawrence M. Henling, Harry B. Gray*, Elena Tkachenko, Atif Mahammed and Zeev Gross*
Page: 189-197
The preparation and spectroscopic properties of a series of metallocorroles with polar head groups CHO and CH=C(CN)(COOH) are reported along with the X-ray crystal structure of 5,10,15-tris(pentafluorophenyl)corrolatoaluminium(III)bispyridine. Amphiphilic aluminum(III) and gallium(III) corroles exhibit electronic absorption and fluorescence band maxima at lower energies than their hydrophobic analogs.
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Fuyong Cheng and Alex Adronov*
Page: 198-204
Mixing single-walled carbon nanotubes with a highly soluble conjugated porphyrin polymer in an acidified THF solution resulted in the formation of a strong polymer-nanotube complex. This interaction occurred with both the metalated (Zn) porphyrin polymer and a demetalated, protonated porphyrin polymer. Both complexes exhibited a high degree of solubility in THF, and were found to exfoliate nanotube bundles into individual polymer-coated nanotubes.
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László Kálmán*, Arlene L. M. Haffa, JoAnn C. Williams, Neal W. Woodbury and James P. Allen
Page: 205-211
The rates of electron transfer from ferrocene to the oxidized bacteriochlorophyll dimer, P, in reaction centers from the purple photosynthetic bacterium Rhodobacter sphaeroides were measured for a series of mutants. For some mutants, the pH dependence of the bimolecular rate constants for the electron transfer followed a sigmoidal pattern that could be described with a Henderson-Hasselbalch equation, attributable to the change of the free energy difference for the reaction due to deprotonation of the introduced carboxylic side chains.
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