Abstract
In this work, we demonstrate a photoluminescence-based method to monitor the kinetics of an organohalide reaction by way of detecting released bromide ions at cesium lead halide nanoparticles. Small aliquots of the reaction are added to an assay with known concentrations of CsPbI3, and the resulting Br-to-I halide exchange (HE) results in rapid and sensitive wavelength blueshifts (Δλ) due to CsPbBrxI3-x intermediate concentrations, the wavelengths of which are proportional to concentrations. An assay response factor, C, relates Δλ to Br- concentration as a function of CsPbI3 concentration. The observed kinetics, as well as calculated rate constants, equilibrium, and activation energy of the solvolysis reaction tested correspond closely to synthetic literature values, validating the assay. Factors that influence the sensitivity and performance of the assay, such as CsPbI3 size, morphology, and concentration, are discussed.
Original language | English (US) |
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Pages (from-to) | 418-423 |
Number of pages | 6 |
Journal | ACS Nanoscience Au |
Volume | 3 |
Issue number | 5 |
DOIs | |
State | Published - Oct 18 2023 |
Keywords
- assay
- cesium lead iodide
- colorimetric
- organohalide
- perovskite
- sensing
ASJC Scopus subject areas
- Chemistry (miscellaneous)
- Materials Science (miscellaneous)