000191125 001__ 191125
000191125 005__ 20181203023338.0
000191125 0247_ $$2doi$$a10.1016/j.ica.2013.07.057
000191125 022__ $$a0020-1693
000191125 02470 $$2ISI$$a000325471600037
000191125 037__ $$aARTICLE
000191125 245__ $$aRedox properties of cobalt(II) complexes with azole-pyridines
000191125 260__ $$aLausanne$$bElsevier$$c2013
000191125 269__ $$a2013
000191125 300__ $$a8
000191125 336__ $$aJournal Articles
000191125 520__ $$aWe report nine new homoleptic octahedral cobalt(II) complexes [Co((NN)-N-boolean AND)(3)](2+) and [Co((NNN)-N-boolean AND-N-boolean AND)(2)](2+) with bidentate or tridentate azole-pyridine ligands (where azole is 1,2,4-triazole or a substituted pyrazole). The complexes are air-and moisture-stable solids of pale pink to pale brown color that exhibit quasireversible redox processes in polar organic solvents. By changing azole heterocycle and by adding methyl groups, we tune redox potentials of the complexes from 0.05 to 0.5 V for the Co(III/II) couple (its cyclic voltammogram depends on the electrode history) and from -1.08 to -1.57 V for the Co(II/I) couple to give a redox gap of 1.37-1.82 V. Replacing a pyrazole with electron-deficient 1,2,4-triazole strongly positively shifts redox potentials of the complexes; in contrast, adding electron-donor methyl groups shifts the potentials negatively. (C) 2013 Elsevier B.V. All rights reserved.
000191125 6531_ $$aAzole
000191125 6531_ $$aLigand
000191125 6531_ $$aCobalt
000191125 6531_ $$aComplex
000191125 6531_ $$aElectrochemistry
000191125 6531_ $$aVoltammetry
000191125 700__ $$0244226$$aShavaleev, Nail M.$$g178166
000191125 700__ $$0244232$$aKessler, Florian$$g205239
000191125 700__ $$0240191$$aGraetzel, Michael$$g105292
000191125 700__ $$0240422$$aNazeeruddin, Mohammad K.$$g105958
000191125 773__ $$j407$$q261-268$$tInorganica Chimica Acta
000191125 909C0 $$0252060$$pLPI$$xU10101
000191125 909CO $$ooai:infoscience.tind.io:191125$$pSB$$particle
000191125 917Z8 $$x105528
000191125 937__ $$aEPFL-ARTICLE-191125
000191125 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000191125 980__ $$aARTICLE