期刊
SCIENCE
卷 340, 期 6139, 页码 1434-1437出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1238187
关键词
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资金
- Office of Naval Research BRC Program
- Helios Solar Energy Research Center
- Office of Science, Office of Basic Energy Sciences, U.S. Department of Energy [DE-AC02-05CH11231]
- NSF [DMR-1206512]
- European Research Council [DYNamo ERC-2010-AdG-267374]
- European Union [FP7-PEOPLE-2010-IOF-271909]
- Austrian Science Fund (FWF) [J3026-N16]
- Spanish Juan de la Cierva program [JCI-2010-08156]
- Direct For Mathematical & Physical Scien [1206512] Funding Source: National Science Foundation
- Division Of Materials Research [1206512] Funding Source: National Science Foundation
- Austrian Science Fund (FWF) [J3026] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [J 3026] Funding Source: researchfish
Observing the intricate chemical transformation of an individual molecule as it undergoes a complex reaction is a long-standing challenge in molecular imaging. Advances in scanning probe microscopy now provide the tools to visualize not only the frontier orbitals of chemical reaction partners and products, but their internal covalent bond configurations as well. We used noncontact atomic force microscopy to investigate reaction-induced changes in the detailed internal bond structure of individual oligo-(phenylene-1,2-ethynylenes) on a (100) oriented silver surface as they underwent a series of cyclization processes. Our images reveal the complex surface reaction mechanisms underlying thermally induced cyclization cascades of enediynes. Calculations using ab initio density functional theory provide additional support for the proposed reaction pathways.
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