85540-96-1

Basic information

• Product Name: 34496-91-8
• CAS NO: 85540-96-1
• Molecular Formula: CO₂
• Molecular Weight: 44.0098
• Mol File: 85540-96-1.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 34496-91-8(CAS DataBase Reference)
• NIST Chemistry Reference: 34496-91-8(85540-96-1)
• EPA Substance Registry System: 34496-91-8(85540-96-1)

Safety Data

• Hazardous Substances Data: 85540-96-1(Hazardous Substances Data)

Upstream product

• 124-38-9 carbon dioxide 
• 92-94-4 p-terphenyl radical anion 
• 91150-75-3 2-ethyl-butyrate 

Downstream Products

• 91948-72-0 C₇H₇NO₅S^(1-) 
• 34512-32-8 1-(4-nitro-phenyl)-ethanone; radical anion 
• 64162-02-3 C₇H₆N₂O₃^(1-) 
• 12402-47-0 4-Nitrobenzonitrile radical anion 
• 69979-66-4 C₇H₆N₂O₃^(1-) 
• 34512-33-9 4-nitrobenzaldehyde radical anion 
• 34537-99-0 p-nitrobenzoic acid dianion radical 
• 91948-74-2 C₆H₄NO₅S^(2-) 
• 91948-73-1 C₆H₆N₂O₄S^(1-) 
• 35848-46-5 4-(α,α,α-Trifluoromethyl)nitrobenzene radical anion 
• 34480-12-1 4-nitro-benzoic acid methyl ester; radical anion 
• 34473-10-4 1-methoxy-4-nitro-benzene; radical anion 
• 34505-33-4 p-Dinitrobenzol-Monoradikalanion 

Relevant articles and documents

Mechanistic and kinetic studies of cobalt macrocycles in a photochemical CO2 reduction system: Evidence of Co-CO2 adducts as intermediates

Cobalt macrocycles mediate electron transfer in the photoreduction of CO2 with p-terphenyl as a photosensitizer and a tertiary amine as a sacrificial electron donor in a 5:1 acetonitrile/methanol mixture. The mechanism and kinetics of this system have been studied by continuous and flash photolysis techniques. Transient spectra provide evidence for the sequential formation of the p-terphenyl radical anion, the CoIL+ complex, the [CoIL-CO2]+ complex, and the [S-CoIIIL-(CO22-)]+ complex (L = HMD = 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene; S = solvent) in the catalytic system. The electron-transfer rate constant for the reaction of p-terphenyl radical anion with CoIIL2+ is 1.1 × 1010 M-1 s-1 and probably diffusion controlled because of the large driving force (～+1.1 V). Flash photolysis studies yield a rate constant 1.7 × 108 M-1 s-1 and an equilibrium constant 1.1 × 104 M-1 for the binding of CO2 to CoIL+ in the catalytic system. These are consistent with those previously obtained by conventional methods in acetonitrile. Studies of catalytic systems with varying cobalt macrocycles highlight some of the factors controlling the kinetics of the photoreduction of CO2. Steric hindrance and reduction potentials are important factors in the catalytic activity for photochemical CO2 reduction.