Copper(ii) complexes as turn on fluorescent sensors for nitric oxide |
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Authors: | Pankaj Kumar Apurba Kalita Biplab Mondal |
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Affiliation: | Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India. biplab@iitg.ernet.in. |
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Abstract: | Two copper(ii) complexes, 1 and 2, of two tridentate N-donor ligands, L(1) and L(2) [L(1) = dansyl derivative of bis-[3-(dimethylamino)-propyl]amine; L(2) = dansyl derivative of dipropylenetriamine] were synthesized and characterized. The quenched fluorescence intensity of complexes 1 and 2, in degassed methanol or aqueous (buffered at pH 7.2) solution, was found to reappear on exposure to nitric oxide. This is attributed to the reduction of paramagnetic Cu(ii) center by nitric oxide to diamagnetic Cu(i). |
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