Electrochemiluminescence from hydrophilic thin film Ru(bpy)3(2+)-modified electrode prepared using natural halloysite nanotubes and polyacrylamide gel.
Because Ru(bpy)(3)(2+)-modified electrodes are often used in aqueous condition, the development of a hydrophilic modified electrode is of critical importance. Herein a hydrophilic, thin film Ru(bpy)(3)(2+)-modified electrode is successfully developed using polyacrylamide gel to embed halloysite nanotubes on the electrode surface which is used to adsorb Ru(bpy)(3)(2+) by cation-exchange. X-ray photoelectron spectroscopy demonstrates the formation of the film on an electrode and the high adsorbing capacity of the halloysite nanotubes toward Ru(bpy)(3)(2+). The different electrochemiluminescence (ECL) behaviors of the electrode using nitrilotriacetic acid and tripropylamine, as co-reactants, illustrate the hydrophilic character of the modified electrode. Contrary to the previous works, the addition of carbon nanotubes into the modified electrode film leads to a decreased ECL emission, due to the reduction in the porosity of the film, which hinders the diffusion of the analyte.
Xing
Bo
B
Research Center for Analytical Sciences, College of Chemistry, Nankai University, Tianjin, 300071, China.
Yin
Xue-Bo
XB
D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives* / Q000737:chemistry; D000180:Acrylic Resins / Q000737:chemistry*; D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D056831:Coordination Complexes; D004563:Electrochemistry; D004566:Electrodes; D008163:Luminescent Measurements / Q000295:instrumentation / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry*; D009571:Nitrilotriacetic Acid / Q000032:analysis; D016062:Porosity; D011437:Propylamines / Q000032:analysis; D012680:Sensitivity and Specificity; D017975:Ruthenium Compounds
D015082:2,2'-Dipyridyl; D000180:Acrylic Resins; D000538:Aluminum Silicates; D000077215:Clay; D056831:Coordination Complexes; D009571:Nitrilotriacetic Acid; D011437:Propylamines; C016680:polyacrylamide gels; C547232:tris(2,2-bipyridine)-ruthenium(II); D017975:Ruthenium Compounds; C096226:tripropylamine