Journal
SCIENCE
Volume 330, Issue 6000, Pages 66-69Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1193928
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Funding
- U.S. Air Force Office of Scientific Research (AFOSR)
- Multidisciplinary University Research Initiative (MURI)
- Army Research Office (ARO)
- NSF
- U.S. Department of Defense
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0749614] Funding Source: National Science Foundation
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Allosteric regulation of organometallic catalysts could allow for greater control over reactions. We report an allosteric supramolecular structure in which a monometallic catalytic site has been buried in the middle layer of a triple-layer complex. Small molecules and elemental anions can open and close this complex and reversibly expose and conceal the catalytic center. The ring-opening polymerization of e-caprolactone can be turned on by the in situ opening of the triple-layer complex and then completely turned off by reforming it through the abstraction of Cl(-), the allosteric effector agent, without appreciable loss of catalytic activity. This process can regulate the molecular weights of the resulting polymers.
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