1997
DOI: 10.1021/ic961490s
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Structural, Electrical, Magnetic, and Spectroscopic Properties of Ring-Oxidized Molecular Metals Produced by Iodination of Metal-Free and Nickel Tetrabenzporphyrins

Abstract: Detailed studies of the structure, conductivitity, magnetoresistance, optical spectra, and magnetic properties (susceptibility, EPR) for the new molecular metal tetrabenzporphyrin iodide (H(2)(tbp)I) and the electrical, spectral, and magnetic properties of Ni(tbp)I are reported. Paramagnetic transition-ion impurities were carefully excluded during the synthesis of H(2)(tbp)I and Ni(tbp)I, and both materials show much higher, metal-like conductivites than previously seen for less-pure Ni(tbp)I. Comparison of th… Show more

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Cited by 15 publications
(17 citation statements)
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“…Information on the molecular packing in the nanofibers was obtained by GIXRD and SAED analyses. The sum of out-of-plane and in-plane XRD signals of the BP–TFA fibers on an ITO glass substrate (Figure c, blue and red lines) matches well with the simulated XRD pattern based on a single-crystal structure of needle-crystalline 2BP·BP +• ·I 3 – (Figure c, black line), in which BP and BP +• molecules cofacially π-stack along the needle axis . This matching of the data between BP–TFA and 2BP·BP +• ·I 3 – led us to propose the model structure of the BP–TFA column shown in Figure b.…”
supporting
confidence: 79%
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“…Information on the molecular packing in the nanofibers was obtained by GIXRD and SAED analyses. The sum of out-of-plane and in-plane XRD signals of the BP–TFA fibers on an ITO glass substrate (Figure c, blue and red lines) matches well with the simulated XRD pattern based on a single-crystal structure of needle-crystalline 2BP·BP +• ·I 3 – (Figure c, black line), in which BP and BP +• molecules cofacially π-stack along the needle axis . This matching of the data between BP–TFA and 2BP·BP +• ·I 3 – led us to propose the model structure of the BP–TFA column shown in Figure b.…”
supporting
confidence: 79%
“…The out-of-plane XRD data of BP–TFA (blue line) show a strong peak at 6.08° ( d = 14.54 Å; intercolumnar distance), while the in-plane XRD data (red line) reveal a prominent peak at 27.27° ( d = 3.27 Å; π-stacking distance of the cofacial BP stack), which was not seen in the out-of-plane data. The latter distance is much shorter than the π-stacking distance in the neutral BP crystal (3.359 Å) and slightly longer than the one in the 2BP·BP +• ·I 3 – crystal (3.232 Å) …”
mentioning
confidence: 67%
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“…Although the g and C parameters observed in the spectrum of the third partially oxidized zirconium diphthalocyaninato complex [ZrPc 2 ](I 3 ) 2/3 are comparable, the spin concentration is significantly lower [38] ]IBr 2 the g value remains constant with decreasing temperature, but the line width decreases only slightly to a value of 5.4 G at 80 K, the lowest measurement temperature. The narrow line width of the EPR signal within the temperature range is typical for one-dimensional conductors because the direction of spin-lattice relaxation is restricted and slower [83]. The decrease of the line width can be explained in term of enhanced motional narrowing from a reduction in carrier mobility with decreasing temperature.…”
Section: Magnetic Propertiesmentioning
confidence: 98%