Formation of A2B2 supramolecular porphyrin co-polymers.
New supramolecular A2B2 co-polymers formed in solution from a rigid diporphyrin monomer (the A2 unit) and a short flexible dipyridine monomer (the B2 unit) are reported; NMR experiments show that complete binding occurs at mM concentrations; UV titrations reveal that the dipyridine unit and a monomeric control ligand have identical binding constants, confirming that linear polymers were generated (in preference to small cyclic oligomers); at 2 x 10(-2) M polymers with an average molecular weight of 17,100 g mol-1 and containing approximately 14 porphyrin units have formed.
Polymer Centre, Chemistry Department, University of Sheffield, Brook Hill, Sheffield, UK S3 7HF. l.j.twyman@sheffield.ac.uk
Lance J
LJ
Twyman
Amy S H
AS
King
D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D011108:Polymers / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
D008024:Ligands; D011108:Polymers; D011166:Porphyrins