Photoinduced Charge Transfer from Quantum Dots Measured by Cyclic Voltammetry.

التفاصيل البيبلوغرافية
العنوان:	Photoinduced Charge Transfer from Quantum Dots Measured by Cyclic Voltammetry.
المؤلفون:	Homer MK; Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States., Kuo DY; Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States., Dou FY; Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States., Cossairt BM; Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States.
المصدر:	Journal of the American Chemical Society [J Am Chem Soc] 2022 Aug 10; Vol. 144 (31), pp. 14226-14234. Date of Electronic Publication: 2022 Jul 27.
نوع المنشور:	Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, Non-U.S. Gov't
اللغة:	English
بيانات الدورية:	Publisher: American Chemical Society Country of Publication: United States NLM ID: 7503056 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5126 (Electronic) Linking ISSN: 00027863 NLM ISO Abbreviation: J Am Chem Soc Subsets: MEDLINE
أسماء مطبوعة:	Publication: Washington, DC : American Chemical Society Original Publication: Easton, Pa. [etc.]
مواضيع طبية MeSH:	Quantum Dots*, Electron Transport ; Oxidation-Reduction
مستخلص:	Measuring and modulating charge-transfer processes at quantum dot interfaces are crucial steps in developing quantum dots as photocatalysts. In this work, cyclic voltammetry under illumination is demonstrated to measure the rate of photoinduced charge transfer from CdS quantum dots by directly probing the changing oxidation states of a library of molecular charge acceptors, including both hole and electron acceptors. The voltammetry data demonstrate the presence of long-lived charge donor states generated by native photodoping of the quantum dots as well as a positive correlation between driving force and rate of charge transfer. Changes to the voltammograms under illumination follow mechanistic predictions from the E r C i ' zone diagram, and electrochemical modeling allows for measurement of the rate of productive electron transfer. Observed rates for photoinduced charge transfer are on the order of 0.1 s ^-1 , which are distinct from the picosecond dynamics measured by conventional transient optical spectroscopy methods and are more closely connected to the quantum yield of light-mediated chemical transformations.
تواريخ الأحداث:	Date Created: 20220727 Date Completed: 20220811 Latest Revision: 20220901
رمز التحديث:	20240628
DOI:	10.1021/jacs.2c04991
PMID:	35897128
قاعدة البيانات:	MEDLINE

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الوصف
تدمد:	1520-5126
DOI:	10.1021/jacs.2c04991