Luminescent properties of water-soluble conjugated metallopolymers and their application to fluorescent nitric oxide detection.
Water-soluble pi-conjugated polymers (CPs) incorporating 5,5'-(2,2'-dipyridyl) (CP1) or 6,6'-(2,2'-dipyridyl) (CP2) units within the pi-conjugated backbone were prepared as scaffolds for macromolecular metal complexation. The response of CP emission to a range of metal ions was investigated in water, 10 mM aqueous sodium dodecyl sulfate, and acetonitrile/water (95:5). Cupric ions are the most efficient quenchers of CP emission, with K(SV) = 1.1 x 10(5) and 5.2 x 10(4) M(-1) in water for CP1a (40% bipyridyl monomer units) and CP1b (20% bipyridyl monomer units), respectively. Quenching is approximately twice as effective in acetonitrile/water (95:5) (K(SV) = 3.1 x 10(5) M(-1) for CP1a and 1.1 x 10(5) M(-1) for CP1b). Partial restoration of emission was observed upon exposure of Cu(II)-CP solutions to excess NO(g) in acetonitrile/water (95:5) or 10 mM SDS(aq).
Do
Loi
L
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Smith
Rhett C
RC
Tennyson
Andrew G
AG
Lippard
Stephen J
SJ
D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives* / Q000737:chemistry; D000480:Alkynes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D004987:Ethers / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D009569:Nitric Oxide / Q000032:analysis*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
D000480:Alkynes; D004987:Ethers; D009942:Organometallic Compounds; C436384:phenyleneethynylene; D009569:Nitric Oxide; D015082:2,2'-Dipyridyl; D003300:Copper