Spin-Doctoring Cobalt Redox Shuttles for Dye-Sensitized Solar Cells

Inorganic Chemistry
Josh BaillargeonThomas W Hamann

Abstract

A new low-spin (LS) cobalt(II) outer-sphere redox shuttle (OSRS) [Co(PY5Me2)(CN)]+, where PY5Me2 represents the pentadentate ligand 2,6-bis(1,1-bis(2-pyridyl)ethyl)pyridine, has been synthesized and characterized for its potential application in dye-sensitized solar cells (DSSCs). Introduction of the strong field CN- ligand into the open axial coordination site forced the cobalt(II) complex, [Co(PY5Me2)(CN)]+, to become LS based upon the complex's magnetic susceptibility (1.91 ± 0.02 μB), determined by the Evans method. Interestingly, dimerization and subsequent cobalt hexacyanide cluster formation of the [Co(PY5Me2)(CN)]+ monomer was observed upon long-term solvent exposure or addition of a supporting electrolyte for electrochemical characterization. Although long-term stability of the [Co(PY5Me2)(CN)]+ complex made it difficult to fabricate liquid electrolytes for DSSC applications, short-term stability in neat solvent afforded the opportunity to isolate the self-exchange kinetics of [Co(PY5Me2)(CN)]2+/+ via stopped-flow spectroscopy. Use of Marcus theory provided a smaller than expected self-exchange rate constant of 20 ± 5.5 M-1 s-1 for [Co(PY5Me2)(CN)]2+/+, which we attribute to a Jahn-Teller effect observed from the colle...Continue Reading

References

Mar 28, 1996·Chemical Reviews·Neil G. Connelly, William E. Geiger
Sep 11, 2002·Inorganic Chemistry·Robertus J M Klein GebbinkT Daniel P Stack
Sep 11, 2002·Inorganic Chemistry·Christian R GoldsmithT Daniel P Stack
Sep 13, 2002·Journal of the American Chemical Society·Shawn A SappCarlo A Bignozzi
Dec 24, 2004·Dalton Transactions : an International Journal of Inorganic Chemistry·Hoi Shan ChowYaqiu Tao
Jun 20, 2006·Inorganic Chemistry·Sidney F A KettlePier Luigi Stanghellini
Aug 5, 2009·Chemical Communications : Chem Comm·Danna E FreedmanJeffrey R Long
Oct 23, 2009·Accounts of Chemical Research·Gerrit Boschloo, Anders Hagfeldt
May 13, 2011·Journal of the American Chemical Society·Jesse W Ondersma, Thomas W Hamann
May 27, 2011·Journal of the American Chemical Society·Yujie SunChristopher J Chang
Apr 5, 2013·Physical Chemistry Chemical Physics : PCCP·Sandra M FeldtAnders Hagfeldt

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Citations

Jul 23, 2020·Chemical Communications : Chem Comm·Ariana Z SpentzosNeil C Tomson

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