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SUMMARY:Hadean\, pre-biotic Photosynthesis and Enzyme-like Heterogeneous C
 atalysts: Mimicking a state we do not know - Prof. Markus Antonietti\, Max
  Planck Institute of Colloids and Interfaces\, Potsdam-Golm
DTSTART:20161020T143000Z
DTEND:20161020T153000Z
UID:TALK67523@talks.cam.ac.uk
CONTACT:Sharon Connor
DESCRIPTION:Polymeric graphitic Carbon Nitride is made  from urea under ea
 rly-Earth conditions\, as reported already by Justus Liebig in 1832. It ju
 st recently turned out to be a valuable extension to current semiconductin
 g organic materials\, which is due to the ease of synthesis\, but also due
  to its extreme chemical stability. It serves as a novel catalyst which- a
 mong other reactions- can even chemically activate CO2 or photochemically 
 turn water into hydrogen and oxygen. I will also present first schemes on 
 chemical reactions where the electronic properties of C3N4 are generalized
  to other reactions\, with C/N-nanostructures successfully mimicking oxida
 tion enzymes with high conversions and selectivity. Copolymerization\, but
  also new alternative condensation are here used to adjust electronic prop
 erties and coupled reactivity. Such  polymers can be “hybridized” with
  enzymes to generate more complex molecules photochemically via cofactor c
 oupling\, as shown by the chiral reduction of ketones by light.\n
LOCATION:Pfizer Lecture Theatre\,  Department of Chemistry
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