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Cucurbit[8]uril-stabilized charge transfer complexes with diquat driven by pH: a SERS study

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2012 English Publisher:Royal Society of Chemistry (RSC)Journal:Physical Chemistry Chemical Physics, volume 14, page 4,935 (issn: 1463-9076, eissn: 1463-9084,

Authors: Concepción Domingo; María Lorena Roldán; José Vicente García-Ramos; Santiago Sánchez-Cortés;

doi: 10.1039/c2cp23503j

pmid: 22388790

handle: 10261/76219

Cucurbit[8]uril-stabilized charge transfer complexes with diquat driven by pH: a SERS study

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Abstract

In this work, we have studied the pH-dependence of the formation of DQCB[8] complexes by surface-enhanced Raman scattering (SERS) spectroscopy. The SERS spectra suggest that at acidic pH CB[8] can form a binary complex with the dication DQ(+2) while at higher pH ternary complexes with the radical cation dimer (DQ(+)˙)(2) and the radical cation-dication dimer (DQ(+)˙DQ(+2)) are formed. The pH-enhanced diquat (DQ) dimerization inside the cucurbit[8]uril cavity has not been reported until now. In addition, this study provides very valuable information regarding the use of CB[8] functionalized silver nanoparticles as SERS substrate for sensing applications.

Related Organizations

Spanish National Research Council
Spain
Institute for the Structure of Matter
Spain

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