Synthesis and application of a new class of D–π–A type charge transfer probe containing imidazole – naphthalene units for detection of F− and CO2. Issue 9 (17th January 2017)

• Record Type: Journal Article
• Authors: Gupta, Ramesh C.; Ali, Rashid; Razi, Syed S.; Srivastava, Priyanka; Dwivedi, Sushil K.; Misra, Arvind
• Is Part Of: RSC advances. Volume 7:Issue 9(2017)
• Page Start: 4941
• Page End: 4949
• Publication Date: 2017-01-17
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra26439e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A new class of D–π–A type charge transfer probe, 3 and4, containing imidazole – naphthalene moieties as donor and acceptor, respectively, has been synthesized via a Suzuki coupling reaction. Abstract : A new class of D–π–A type charge transfer probe, 3 and4, containing imidazole – naphthalene moieties as donor and acceptor, respectively, has been synthesized via a Suzuki coupling reaction. Probe3, upon interaction with different classes of anions, showed high selectivity toward fluoride with a detection sensitivity of 4 ppb (0.22 μM). The in situ generated imidazolyl ion (3 + F − ) enables the detection of CO2 with the restoration of the original absorption and emission properties of3 . The mode of interaction has been confirmed by 1 H NMR and DFT studies which suggested the deprotonation of the –NH fragment of the imidazolyl unit in the presence of F − .