A simple colorimetric sensor for biologically important anions based on intramolecular charge transfer (ICT)



: Li JW, Chen HM, Lin H, Lin HK

Publisher: ELSEVIER SCIENCE SA

: 2009

: Journal of Photochemistry and Photobiology B: Biology

: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY

: J PHOTOCH PHOTOBIO B

: 97

: 1

: 18

: 21

: 4

: 1011-1344

DOI: https://doi.org/10.1016/j.jphotobiol.2009.07.006


A sensitive colorimetric sensor (1) based on 4,5-dinitrobenzene-1,2-diamine was designed and synthesized. Binding of anions such as AcO(-), F(-) and H(2)PO(4)(-) results in a notable change in the visible region of spectrum (an approximately 90 nm red shift), which can be detected by the 'naked-eye'. Furthermore, the binding ability was evaluated by UV-vis titration experiments as following: AcO(-) > F(-) > H(2)PO(4) >> Cl(-), Br(-), I(-). The nature of the color change of I induced by AcO(-) was due to the intramolecular charge transfer (ICT) which was confirmed by X-ray crystal structure and (1)H NMR titration spectra. (c) 2009 Elsevier B.V. All rights reserved.

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