The electron-transfer capacity of mol. rectangle ions PtII4(PEt3)8(m-anth2-)2(m-L)24+ with anth2- = anthracene-1,8-diyl and L = 4,4'-bipyridine (bp) or 1,2-bis(4-pyridyl)ethene (bpe) was studied in acetonitrile and dichloromethane using cyclic voltammetry, EPR, and UV-visible-near-IR spectroelectrochem. The compds. can be reversibly reduced, 1st in a two-electron process and then via two closely sepd. 1-electron steps. Oxidn. was also possible at rather low potentials in a reversible two-electron step, followed by an electrochem. irreversible process. The spectroscopic results indicate redn. at the neutral acceptor ligands L and oxidn. at the formally dianionic anthracene clips. In contrast, the prototypical mol. square Pt(triphos)(μ-bp)48+ undergoes only irreversible redn. on SciFinder(R)
%0 Journal Article
%1 Kaim.2002b
%A Kaim, Wolfgang
%A Schwederski, Brigitte
%A Dogan, Akbey
%A Fiedler, Jan
%A Kuehl, Christopher J.
%A Stang, Peter J.
%D 2002
%J Inorganic Chemistry
%K anthracenediyl bipyridine bispyridylethene electrochem electron ethylphosphine metalla multielectron oxidn oxidn;platinum rectangle redn reservoir supramol tetranuclear
%N 15
%P 4025--4028
%R 10.1021/ic020122n
%T Metalla-Supramolecular Rectangles as Electron Reservoirs for Multielectron Reduction and Oxidation
%V 41
%X The electron-transfer capacity of mol. rectangle ions PtII4(PEt3)8(m-anth2-)2(m-L)24+ with anth2- = anthracene-1,8-diyl and L = 4,4'-bipyridine (bp) or 1,2-bis(4-pyridyl)ethene (bpe) was studied in acetonitrile and dichloromethane using cyclic voltammetry, EPR, and UV-visible-near-IR spectroelectrochem. The compds. can be reversibly reduced, 1st in a two-electron process and then via two closely sepd. 1-electron steps. Oxidn. was also possible at rather low potentials in a reversible two-electron step, followed by an electrochem. irreversible process. The spectroscopic results indicate redn. at the neutral acceptor ligands L and oxidn. at the formally dianionic anthracene clips. In contrast, the prototypical mol. square Pt(triphos)(μ-bp)48+ undergoes only irreversible redn. on SciFinder(R)
@article{Kaim.2002b,
abstract = {The electron-transfer capacity of mol. rectangle ions [PtII4(PEt3)8(\textgreek{m}-anth2-)2(\textgreek{m}-L)2]4+ with anth2- = anthracene-1,8-diyl and L = 4,4'-bipyridine (bp) or 1,2-bis(4-pyridyl)ethene (bpe) was studied in acetonitrile and dichloromethane using cyclic voltammetry, EPR, and UV-visible-near-IR spectroelectrochem. The compds. can be reversibly reduced, 1st in a two-electron process and then via two closely sepd. 1-electron steps. Oxidn. was also possible at rather low potentials in a reversible two-electron step, followed by an electrochem. irreversible process. The spectroscopic results indicate redn. at the neutral acceptor ligands L and oxidn. at the formally dianionic anthracene clips. In contrast, the prototypical mol. square {[Pt(triphos)(μ-bp)]4}8+ undergoes only irreversible redn. [on SciFinder(R)]},
added-at = {2019-07-15T13:41:23.000+0200},
author = {Kaim, Wolfgang and Schwederski, Brigitte and Dogan, Akbey and Fiedler, Jan and Kuehl, Christopher J. and Stang, Peter J.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/29414a055a9dfc88e3af7c3ebabce31b7/b_schwederski},
doi = {10.1021/ic020122n},
interhash = {d2029645401c859dd951ed5f7f0ad56a},
intrahash = {9414a055a9dfc88e3af7c3ebabce31b7},
issn = {0020-1669},
journal = {Inorganic Chemistry},
keywords = {anthracenediyl bipyridine bispyridylethene electrochem electron ethylphosphine metalla multielectron oxidn oxidn;platinum rectangle redn reservoir supramol tetranuclear},
number = 15,
pages = {4025--4028},
timestamp = {2019-07-15T11:42:10.000+0200},
title = {Metalla-Supramolecular Rectangles as Electron Reservoirs for Multielectron Reduction and Oxidation},
volume = 41,
year = 2002
}
