Using the Photoluminescence Color Change in Cesium Lead Iodide Nanoparticles to Monitor the Kinetics of an External Organohalide Chemical Reaction by Halide Exchange

IF 4.8 Q2 NANOSCIENCE & NANOTECHNOLOGY

ACS Nanoscience Au Pub Date : 2023-09-07 DOI:10.1021/acsnanoscienceau.3c00026

Tennyson L. Doane, Kevin J. Cruz, Tsung-Hsing Chiang and Mathew M. Maye*,

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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 CsPbBr_xI_3–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.

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利用碘化铯-铅纳米粒子的光致发光颜色变化监测外部有机卤化物化学反应动力学

在这项工作中，我们展示了一种基于光致发光的方法，通过检测铯卤化铅纳米颗粒释放的溴离子来监测有机卤化反应的动力学。在已知浓度的CsPbI3中加入少量反应，由此产生的br - i卤化物交换(HE)导致快速而敏感的波长蓝移(Δλ)，这是由于CsPbBrxI3-x中间浓度，其波长与浓度成正比。测定响应因子C与Br -浓度Δλ有关，是CsPbI3浓度的函数。观察到的动力学以及计算出的速率常数、平衡和活化能与合成文献的值非常接近，验证了该分析。影响灵敏度和性能的因素，如CsPbI3的大小，形态和浓度，进行了讨论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Nanoscience Au 材料科学、纳米科学-

CiteScore

4.20

自引率

0.00%

发文量

期刊介绍： ACS Nanoscience Au is an open access journal that publishes original fundamental and applied research on nanoscience and nanotechnology research at the interfaces of chemistry biology medicine materials science physics and engineering.The journal publishes short letters comprehensive articles reviews and perspectives on all aspects of nanoscience and nanotechnology:synthesis assembly characterization theory modeling and simulation of nanostructures nanomaterials and nanoscale devicesdesign fabrication and applications of organic inorganic polymer hybrid and biological nanostructuresexperimental and theoretical studies of nanoscale chemical physical and biological phenomenamethods and tools for nanoscience and nanotechnologyself- and directed-assemblyzero- one- and two-dimensional materialsnanostructures and nano-engineered devices with advanced performancenanobiotechnologynanomedicine and nanotoxicologyACS Nanoscience Au also publishes original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials engineering physics bioscience and chemistry into important applications of nanomaterials.