title: Polymeric optical sensors for selective and sensitive nitrite detection using cobalt(III) corrole and rhodium(III) porphyrin as ionophores.
abstract: Cobalt(III) 5,10,15-tris(4-tert-butylphenyl) corrole with a triphenylphosphine axial ligand and rhodium(III) 5,10,15,20-tetra(p-tert-butylphenyl) porphyrin are incorporated into plasticized poly(vinyl chloride) films to fabricate nitrite-selective bulk optodes via absorbance measurements. The resulting films yield sensitive, fast and fully reversible response toward nitrite with significantly enhanced nitrite selectivity over other anions including lipophilic anions such as thiocyanate and perchlorate. The selectivity patterns differ greatly from the Hofmeister series based on anion lipophilicity and are consistent with selectivity obtained with potentiometric sensors based on the same ionophores. The optical nitrite sensors are shown to be useful for detecting rates of emission of nitric oxide (NO) from NO releasing polymers containing S-nitroso-N-acetyl-DL-penicillamine.
authors.affiliation: Department of Chemistry, The University of Michigan, Ann Arbor, MI 48109, United States.
authors.forename: Si
authors.initials: S
authors.lastname: Yang
authors.affiliation: Department of Chemistry, The University of Michigan, Ann Arbor, MI 48109, United States.
authors.forename: Yaqi
authors.initials: Y
authors.lastname: Wo
authors.affiliation: Department of Chemistry, The University of Michigan, Ann Arbor, MI 48109, United States. Electronic address: mmeyerho@umich.edu.
authors.forename: Mark E
authors.initials: ME
authors.lastname: Meyerhoff
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D007476:Ionophores / Q000032:analysis*; D009569:Nitric Oxide / Q000032:analysis*; D009573:Nitrites / Q000032:analysis; D055096:Optical Devices; D011108:Polymers / Q000737:chemistry; D011166:Porphyrins / Q000737:chemistry*; D012238:Rhodium / Q000737:chemistry*
chemical_list: D007476:Ionophores; D009573:Nitrites; D011108:Polymers; D011166:Porphyrins; C431863:corrole; D009569:Nitric Oxide; D003035:Cobalt; D012238:Rhodium
keywords: Bulk optode; Ion-selective polymeric film; Nitric oxide; Nitrite