Zn2+‐Ion Sensing by Fluorescent Schiff Base Calix[4]arene Macrocycles. Issue 16 (3rd March 2017)

• Record Type: Journal Article
• Authors: Ullmann, Steve; Schnorr, René; Handke, Marcel; Laube, Christian; Abel, Bernd; Matysik, Jörg; Findeisen, Matthias; Rüger, Robert; Heine, Thomas; Kersting, Berthold
• Is Part Of: Chemistry. Volume 23:Issue 16(2017)
• Page Start: 3824
• Page End: 3827
• Publication Date: 2017-03-03
• Subjects: calix[4]arenes -- fluorescence sensor -- macrocyclic complexes -- nickel -- zinc; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201700253
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: A macrocyclic ligand (H2 L) containing two o, o′ ‐bis(iminomethyl)phenol and two calix[4]arene head units has been synthesized and its coordination chemistry towards divalent Ni and Zn investigated. The new macrocycle forms complexes of composition [ML] (M=Zn, M=Ni) and [ZnL(py)2 ], which were characterized by elemental analysis; IR, UV/Vis, and NMR spectroscopy; electrospray ionization mass spectrometry (ESI‐MS); and X‐ray crystallography (for [ZnL(py)2 ] and [NiL]). H2 L allows the sensitive optical detection of Zn 2+ among a series of biologically relevant metal ions by a dual fluorescence enhancement/quenching effect in solution. The fluorescence intensity of the macrocycle increases by a factor of ten in the presence of Zn 2+ with a detection limit in the lower nanomolar region. Abstract : Lighting up with zinc ! A new macrocycle H2 L comprising fluorescent bis(iminomethyl)phenol and calix[4]arene head units has been synthesized and its coordination chemistry examined. H2 L allows the sensitive optical detection of Zn 2+ among a series of biologically relevant metal ions by a dual fluorescence enhancement/quenching effect in solution.