期刊
JOURNAL OF PHYSICAL CHEMISTRY A
卷 114, 期 32, 页码 8331-8336出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp105034m
关键词
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资金
- National Science Foundation of China (NSFC) [20934002, 20774022]
- National Basic Research Program of China [2005CB623800, 2009CB930000]
A designed ligand-accelerated Cu(I)-catalyzed cycloaddition (CuAAC) reaction was monitored for the first time by real time infrared analysis technique based on ATR-FTIR principles. Principal components analysis (PCA) and two-dimensional correlation spectroscopy (2Dcos) results showed that the consumption of alkyne and azide took place successively followed by the formation of the product 1,2,3-triazole, and a 1:1 complex of two reactants would be formed in the reaction process. The rate-determining step of the CuAAC reaction was also experimentally confirmed for the first time to be the transition of azide-alkyne 1:1 complex to the preproduct 1,2,3-triazole. Our results are in good conformity with the current catalytic mechanism proposed by Sharpless et al. according to DFT calculation results.
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