Protonation, coordination chemistry, cyanometallate "supercomplex" formation and fluorescence chemosensing properties of a bis(2,2'-bipyridino)cyclophane receptor.
A new polyazamacrocycle (L) containing two 2,2'-bipyridino (bpy) units, where the heteroaromatic nitrogen atoms point outwards from the macrocyclic cavity, was synthesized and characterized by elemental analysis, ESI-MS, (1)H and (13)C NMR, FTIR and TGA. Five protonation constants involving aliphatic nitrogens with log K in the range 9.39-3.07 were determined by potentiometry and NMR and a sixth protonation (log K = 2.2) involving a bipyridine moiety could be detected by UV-Vis and NMR titrations. The interaction of L with the cyanometallate anions [Pt(CN)4](2-) and [Co(CN)6](3-) was studied by potentiometry yielding respectively log K values in the ranges 4.0-6.4 and 5.2-10.5, covering pro…
CCDC 953539: Experimental Crystal Structure Determination
Related Article: Sandra Gago, Jorge González, Salvador Blasco, A. Jorge Parola, M. T. Albelda, Enrique García-España, Fernando Pina|2014|Dalton Trans.|43|2437|doi:10.1039/C3DT52061G
CCDC 953540: Experimental Crystal Structure Determination
Related Article: Sandra Gago, Jorge González, Salvador Blasco, A. Jorge Parola, M. T. Albelda, Enrique García-España, Fernando Pina|2014|Dalton Trans.|43|2437|doi:10.1039/C3DT52061G