title: Effect of a carboxyl group on the chemiluminescent reaction of tris(2,2'-bipyridine)ruthenium(III) with aliphatic amines.
abstract: The effect of a carboxyl group beside nitrogen of aliphatic amines on the tris(2,2'-bipyridine)ruthenium(III), Ru(bpy)(3)(3+), chemiluminescent reaction was examined. It has been shown that a carboxylate anion promotes the chemiluminescent reaction at a lower pH and then the aliphatic amines with this substituent can be sensitively detected compared with corresponding aliphatic amines without this substituent. Based on this finding, preliminary studies on simultaneous determination of 4-hydroxyproline, N-methylglycine, N-methylalanine, proline, and pipecolic acid in human serum have been performed using isocratic reversed-phase ion-pair high-performance liquid chromatography (HPLC) with electrogenerated Ru(bpy)(3)(3+) chemiluminescent detection. The detection limits (signal-to-noise ratio of 3) with the proposed method were 3.0, 12, 2.7, 4.6, and 10nM for 4-hydroxyproline, N-methylglycine, N-methylalanine, proline, and pipecolic acid, respectively.
authors.affiliation: Department of Earth and Environmental Sciences, Faculty of Science, Kagoshima University, Kagoshima 890-0065, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Kodamatani
authors.forename: Yu
authors.initials: Y
authors.lastname: Komatsu
authors.forename: Shigeo
authors.initials: S
authors.lastname: Yamazaki
authors.forename: Keiitsu
authors.initials: K
authors.lastname: Saito
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry*; D000409:Alanine / Q000031:analogs & derivatives / Q000097:blood; D000588:Amines / Q000097:blood* / Q000737:chemistry; D006801:Humans; D006909:Hydroxyproline / Q000097:blood; D008163:Luminescent Measurements / Q000379:methods*; D010875:Pipecolic Acids / Q000097:blood; D011392:Proline / Q000097:blood; D012428:Ruthenium / Q000737:chemistry*; D012521:Sarcosine / Q000097:blood
chemical_list: D000588:Amines; D010875:Pipecolic Acids; D015082:2,2'-Dipyridyl; C008408:N-methylalanine; D012428:Ruthenium; D011392:Proline; C031345:pipecolic acid; D000409:Alanine; D006909:Hydroxyproline; D012521:Sarcosine