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Cu(II)-selective fluorescence of a bis-quinolylimine derivative

Paper ID Volume ID Publish Year Pages File Format Full-Text
27582 44030 2011 6 PDF Available
Title
Cu(II)-selective fluorescence of a bis-quinolylimine derivative
Abstract

A new bis-quinolylimine ligand containing an azadiene moiety, 1,4-bis(2-quinolyl)-2,3-diaza-1,3-buthadiene (1), was synthesized by one-step facile condensation. This simple ligand, when dissolved in acetonitrile, shows a Cu2+-selective fluorescence enhancement. Coordination of 1 with Cu2+ produces two kinds of complexes with 1:1 and 1:2 stoichiometries. The 1:2 complex shows a strong fluorescence (ΦF = 0.37), while the 1:1 complex does not (ΦF < 0.01). Ab initio molecular orbital calculation reveals that the 1:1 complex has a distorted structure, while the 1:2 complex has a planar structure. The planar configuration of the 1:2 complex, therefore, allows an extended π-conjugation over the entire molecule and, hence, results in fluorescence enhancement.

Graphical abstractA bis-quinolylimine ligand, 1, shows a Cu2+-selective fluorescence enhancement by a formation of 1–Cu2+ 1:2 complex with a planar configuration, leading to an extended π-conjugation over the entire molecule.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Quinoline; Azadiene; Copper(II); Fluorescence; Extended π-conjugation
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Cu(II)-selective fluorescence of a bis-quinolylimine derivative
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 217, Issue 1, 1 January 2011, Pages 253–258
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us