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A bifunctional 2,2′:6′,2″-terpyridine-based ligand for ratiometric Cu(II) sensing.
- Source :
-
Journal of Coordination Chemistry . Apr2017, Vol. 70 Issue 7, p1123-1136. 14p. 2 Color Photographs, 1 Black and White Photograph, 4 Graphs. - Publication Year :
- 2017
-
Abstract
- Synthesis and characterization of the bifunctional sensor receptor ligand N-([2,2′:6′,2″-terpyridine]-4′-yl)methyl)-N-propylacrylamide (1) and the model ligand N-([2,2′:6′,2″-terpyridine]-4′-yl)methyl)-N-propylisobutyramide (2) are described. Ligand 1 is a receptor for Cu(II) that is copolymerizable with N-isopropylacrylamide giving a ratiometric sensor of weakly bound Cu(II) in environmental waters. Ligand 2 is a model for copolymerized 1 whereby the reactive acrylamide group is replaced by isobutyramide. Solution speciation of complexes of Cu(II) and Zn(II) with 2 were investigated spectroscopically and their solid-state structures were studied through single-crystal X-ray diffraction. Solution UV–vis and fluorescence studies show a preference of 2 toward Cu(II) over Na(I), Zn(II), Cu(II), Co(II), Mn(II), Ni(II), Cd(II), and Pb(II) in accord with the Irving–Williams series and other coordination principles. Solution speciation determined in a weakly coordinating aqueous-organic (60 : 40 DMF/H2O) medium indicates 1 : 1 Cu(II):2 binding as desired in that formation of [Cu(2)2]2+ would crosslink the polymer sensor. The crystal structures of [Cu(2)(NO3)2] and [Zn(2)(NO3)2]·MeOH·1/2Et2O display distorted octahedral geometries where 2 coordinates meridionally and two nitrate groups occupy the remaining sites around the metal center. [ABSTRACT FROM AUTHOR]
- Subjects :
- *BIFUNCTIONAL catalysis
*COPOLYMERS
*COPPER compounds
*ACRYLAMIDE
*X-ray diffraction
Subjects
Details
- Language :
- English
- ISSN :
- 00958972
- Volume :
- 70
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Journal of Coordination Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 122084521
- Full Text :
- https://doi.org/10.1080/00958972.2017.1300660