Title

A versatile and conformationally adaptable fluorene-based receptor for efficient binding of silver cation

Document Type

Article

Publication Date

6-8-2005

Abstract

We have designed and synthesized a versatile fluorene-based receptor (1) in a one-pot reaction from readily available precursors, which adapts a deltaphane- or π-prismand-like conformer via a simple C-C bond rotation. Such a conformational adaptability of 1 allows it to bind a single silver cation with remarkable efficiency (K ∼ 15000 M-1) as monitored by 1H NMR or UV-vis spectroscopy and further confirmed by competition experiments with tris[2.2.2]paracyclophane (or π-prismand 2) as well as a model compound 3 containing only one fluoranyl ring. Copyright © 2005 American Chemical Society.

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