期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 107, 期 42, 页码 11652-11659出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp035544c
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Pyrene and gamma-cyclodextrin (gamma-CD) form complexes with 1: 1, 1:2, and 2:2 (pyrene/CD) stoichiometries. The complexation dynamics was studied using stopped flow. The dynamics for the higher-order complexes (1:2 and 2:2) occurs in the millisecond time domain, which contrasts with the much faster dynamics for the 1:1 complex. When pyrene is mixed with gamma-CD, a transient enhancement of the concentration for the 2:2 complex was observed between 0.2 and I s, which at longer times leads to the formation of the 1:2 complex. This enhancement of the nonthermodynamic product is an example of the kinetic formation of a host-guest complex, and these types of processes may be explored to build self-assemblies under kinetic control.
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