Dynamics of a supramolecular capsule assembly with pyrene.
Dynamics of a supramolecular capsule assembly with pyrene.
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DOI:
10.1021/ja301278p
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发表时间:
2012-03-28
影响因子:
15
通讯作者:
Bohne, Cornelia
中科院分区:
文献类型:
--
作者:
Tang, Hao;de Oliveira, Carla Santos;Sonntag, Gage;Gibb, Corinne L. D.;Gibb, Bruce C.;Bohne, Cornelia
Water-soluble octa-acid cavitands (OA) form dimeric capsules suitable for guest incorporation. Our studies reveal that the mechanism of pyrene (Py) binding follows the rapid (< 1 ms) formation of the Py•OA complex, followed by slower binding with the second OA. The dissociation of the capsular OA•Py•OA complex occurs with a lifetime of 2.7 s, which is five orders of magnitude slower than the microsecond opening-closing (`breathing') previously observed to provide access of small molecules to the encapsulated guest. These different dynamics of the capsules have a potential impact on how the chemistry of included guests could be altered.
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