19137-07-6

Basic information

• Product Name: bis(2,2':6',2''-terpyridine)cobalt(III)
• Synonyms: bis(2,2':6',2''-terpyridine)cobalt(III)
• CAS NO: 19137-07-6
• Molecular Weight: 525.538
• Mol File: 19137-07-6.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: bis(2,2':6',2''-terpyridine)cobalt(III)(CAS DataBase Reference)
• NIST Chemistry Reference: bis(2,2':6',2''-terpyridine)cobalt(III)(19137-07-6)
• EPA Substance Registry System: bis(2,2':6',2''-terpyridine)cobalt(III)(19137-07-6)

Safety Data

• Hazardous Substances Data: 19137-07-6(Hazardous Substances Data)

Upstream product

• 18308-16-2 bis(2,2':6',2''-terpyridine)cobalt(II) 
• 6234-26-0 glycylglycyl-(L)-phenylalanine 
• 51163-51-0 phenylalanine-glycine-glycine 

Relevant articles and documents

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

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 collected monomer crystallographic data. When compared side-by-side to cobalt tris(2,2′-bipyridine), [Co(bpy)3]3+, DSSCs employing [Co(PY5Me2)(CN)]2+ are expected to achieve superior charge collection, which result from a smaller rate constant, ket, for recombination based upon simple dark J-E measurements of the two redox shuttles. Given the negative redox potential (0.254 V vs NHE) of [Co(PY5Me2)(CN)]2+/+ and the slow recombination kinetics, [Co(PY5Me2)(CN)]2+/+ becomes an attractive OSRS to regenerate near IR absorbing sensitizers in solid-state DSSC devices.