Enhanced detection of explosives by turn-on resonance Raman upon host–guest complexation in solution and the solid state

Edward H. Witlicki; Steffen Bähring; Carsten Johnsen; Marta V. Solano; Kent A. Nielsen; Daniel W. Silverstein; Craig W. Marlatt; Lasse Jensen; Jan O. Jeppesen; Amar H. Flood

doi:10.1039/C7CC06517E

Enhanced detection of explosives by turn-on resonance Raman upon host–guest complexation in solution and the solid state†

Edward H. Witlicki,^a Steffen Bähring,

^b Carsten Johnsen,^b Marta V. Solano,^b Kent A. Nielsen,^b Daniel W. Silverstein,^c Craig W. Marlatt,^a Lasse Jensen,

^c Jan O. Jeppesen

^b and Amar H. Flood

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, USA
E-mail: aflood@indiana.edu

^b Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, Odense M, Denmark

^c Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania, USA

Abstract

The recognition of nitroaromatic explosives by a tetrakis-tetrathiafulvalene-calix[4]pyrrole receptor (TTF-C[4]P) yields a “turn on” and fingerprinting response in the resonance Raman scattering observed in solution and the solid state. Intensity changes in nitro vibrations with analyte complexation occur via a mechanism of resonance between the 785 nm laser line and the strongly absorbing charge-transfer chromophore arising from the complex between electron-donating TTF-C[4]P and electron-accepting nitroaromatic explosives. The addition of chloride forms the Cl⁻·TTF-C[4]P complex resetting the system for reuse.

This article is part of the themed collection: Chemosensors and Molecular Logic

Chemical Communications

Enhanced detection of explosives by turn-on resonance Raman upon host–guest complexation in solution and the solid state†

Abstract

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Enhanced detection of explosives by turn-on resonance Raman upon host–guest complexation in solution and the solid state

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