{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T14:23:26Z","timestamp":1783779806094,"version":"3.55.0"},"reference-count":42,"publisher":"Wiley","issue":"35","license":[{"start":{"date-parts":[[2010,8,26]],"date-time":"2010-08-26T00:00:00Z","timestamp":1282780800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2010,9,17]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Bidentate chelation, <jats:italic>meso<\/jats:italic>\u20102,3\u2010dimercaptosuccinic acid (DMSA), was used as a stabilizer for the synthesis of CdTe quantum dots (QDs). The bidentate chelate QDs, characterized with FT\u2010IR, PL, and UV\/Vis spectroscopy; element analysis; and high\u2010resolution transmission electron microscope, exhibited surface traps due to the large surface\/volume ratio of QD particle and the steric hindrance of the DMSA molecule. The unpassivated surface of the QDs produced a narrower band gap than the core and electrochemiluminescent (ECL) emission at relatively low cathodic potential. In air\u2010saturated pH\u20057.0 buffer, the QDs immobilized on electrode surface showed an intense ECL emission peak at \u22120.85\u2005V (vs. Ag\/AgCl). H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub> produced from electrochemical reduction of dissolved oxygen was demonstrated to be the co\u2010reactant, which avoided the need of strong oxidant as the co\u2010reactant and produced a sensitive analytical method for peroxidase\u2010related analytes. Using hydroquinone\/horseradish peroxidase\/H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub> as a model system, a new, reagentless, phenolic, ECL biosensor for hydroquinone was constructed, based on the quenching effect of ECL emission of QDs by consumption of co\u2010reactant H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>. The biosensor showed a linear range of 0.2\u201310\u2005\u03bc<jats:sc>M<\/jats:sc> with acceptable stability and reproducibility. This work opens new avenues in the search for new ECL emitters with excellent analytical performance and makes QDs a more attractive alternative in biosensing.<\/jats:p>","DOI":"10.1002\/chem.201001738","type":"journal-article","created":{"date-parts":[[2010,8,30]],"date-time":"2010-08-30T13:47:03Z","timestamp":1283176023000},"page":"10764-10770","source":"Crossref","is-referenced-by-count":55,"title":["Formation of Surface Traps on Quantum Dots by Bidentate Chelation and Their Application in Low\u2010Potential Electrochemiluminescent 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