Enhanced detection of explosives by turn-on resonance Raman upon host–guest complexation in solution and the solid state. Issue 79 (20th September 2017)

• Record Type: Journal Article
• Authors: Witlicki, Edward H.; Bähring, Steffen; Johnsen, Carsten; Solano, Marta V.; Nielsen, Kent A.; Silverstein, Daniel W.; Marlatt, Craig W.; Jensen, Lasse; Jeppesen, Jan O.; Flood, Amar H.
• Is Part Of: Chemical communications. Volume 53:Issue 79(2017)
• Page Start: 10918
• Page End: 10921
• Publication Date: 2017-09-20
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c7cc06517e
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Being colour coordinated allows turn on detection of nitroaromatics by combining molecular recognition with resonant enhancement of the Raman spectra. 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.