NDLI: Electrochemical properties and synthesis of polyether tailed metallo porphyrin complex for coordinating species detection

Content Provider	IEEE Xplore Digital Library
Author	Il-Kwang Kim Hyun-Ja Chun Jong-Sool Park Long, J.W. Murray, R.W.
Copyright Year	1997
Description	Author affiliation: Wonkwang Univ., Iksan City, South Korea (Il-Kwang Kim)
Abstract	The preparation and electrochemical characterization are described for a new class of metallo-porphyrins in which four oligomeric ethylene glycol chains are attached to each porphyrin structure. The resulting redox polyether hybrids are viscous liquids at room temperature, highly concentrated in porphyrin site (/spl sim/0.4 M), and dissolve large quantities of lithium salts. Microelectrode voltammetry and chronoamperometry have been used to assess the charge transport rates for various reactions in the undiluted melt state of the polyether-porphyrin. The apparent diffusion coefficients, D/sub APP/, vary over a wide range depending on the specific redox reaction and on the amount of added lithium electrolyte. The largest D/sub APP/ values are found for redox reactions centered on the porphyrin ring, while the smallest values are seen for the Fe III/II reaction. This difference is ascribed to enhanced charge transport by an electron hopping mechanism in the former cases. The temperature dependence for D/sub APP/ was used to examine activation parameters. The interaction of polyether-porphyrin melts with the axial ligand, CO, was also examined by voltammetry.
Starting Page	571
Ending Page	574
File Size	365635
Page Count	4
File Format	PDF
ISBN	0780326512
DOI	10.1109/ICPADM.1997.617664
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-25
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Solvents Lithium Methanol Lubricating oils Petroleum Laboratories Temperature Instruments Electrodes Cities and towns
Content Type	Text
Resource Type	Article

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