Ferrocene-Based Ureas as Multisignaling Receptors for Anions
- 17 May 2006
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Organic Chemistry
- Vol. 71 (12) , 4590-4598
- https://doi.org/10.1021/jo0604540
Abstract
The synthesis of structurally new types of ferrocene-based ureas, in which the ferrocene moiety is simultaneously attached to two urea groups, have been prepared directly from 1,1‘-bis(isocyanato)ferrocene 1. Homoditopic receptors 2a−e show spectral and electrochemical anion-sensing action: they display a selective downfield shift of the urea protons and a cathodic shift of the ferrocene/ferrocinium redox couple with hydrogen phosphate and fluoride anions. In addition, receptor 2d based on an unprecedent tetraaza[9]ferrocenophane architecture, shows spectral, electrochemical, and selective fluorescent responses to fluoride anion.Keywords
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