Influence of electron delocalization in heterocyclic core systems on the electrochemical communication in 2,5-di- and 2,3,4,5-tetraferrocenyl thiophenes, furans, and pyrroles.
Influence of electron delocalization in heterocyclic core systems on the electrochemical communication in 2,5-di- and 2,3,4,5-tetraferrocenyl thiophenes, furans, and pyrroles.
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杂环核系统中电子离域对 2,5-二-和 2,3,4,5-四二茂铁噻吩、呋喃和吡咯电化学通讯的影响
DOI:
10.1021/ic200926z
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发表时间:
2011
影响因子:
4.6
通讯作者:
H. Lang
中科院分区:
文献类型:
--
作者:
A. Hildebrandt;D. Schaarschmidt;R. Claus;H. Lang
A series of 2,5-di- and 2,3,4,5-tetraferrocenyl-substituted thiophenes, furans, and pyrroles were synthesized using the NegishiC,Ccross-coupling protocol. The electronic and electrochemical properties of these compounds were investigated by cyclic voltammetry (CV), square wave voltammetry (SWV), and in situ UV–vis/NIR spectroscopy. The molecular structures of 2,5-diferrocenyl furan and 2,3,4,5-tetraferrocenyl-1-methyl-1H-pyrrole in the solid state are discussed. The ferrocenyls could sequentially be oxidized giving two or four reversible responses for the appropriate di- or tetraferrocenyl-substituted heterocyclic molecules. The observed ΔE°′ values range between 186 and 450 mV. The NIR measurements confirm electronic communication as intervalence charge transfer (IVCT) absorptions were found in the corresponding mono- and in case of the tetraferrocenyl compounds also in the dicationic species. All compounds, except tetraferrocenyl thiophene (a class I system), were classified as class II systems according to Robin and Day. They show a linear relationship between ΔE°′ and the IVCT oscillator strengthfwhich could be shown for the first time in organometallic chemistry. This was possible because the series of molecules exhibit analogous geometries and hence, similar electrostatic properties. This correlation was confirmed by electro- and spectro-electrochemical measurements. Within these studies a new approach for the estimation of the effective electron transfer distancesrabis discussed.
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影响因子:
--
作者:
S. Santi;L. Orian;Christian Durante;É. Bencze;Annalisa Bisello;Alessandro Donoli;A. Ceccon;F. Benetollo;L. Crociani
通讯作者:
L. Crociani
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Rico Packheiser;P. Ecorchard;T. Rüffer;M. Lohan;B. Bräuer;F. Justaud;C. Lapinte;H. Lang
通讯作者:
H. Lang
影响因子:
15
作者:
S. Nelsen;R. Ismagilov;D. Powell
通讯作者:
S. Nelsen;R. Ismagilov;D. Powell
影响因子:
4.6
作者:
Strautmann,JuliaBH;George,SerenaDeBeer;Bothe,Eberhard;Bill,Eckhard;Weyhermuller,Thomas;Stammler,Anja;Bogge,Hartmut;Glaser,Thorsten
通讯作者:
Glaser,Thorsten
影响因子:
4.6
作者:
Patoux, C;Coudret, C;Gourdon, A
通讯作者:
Gourdon, A