Time-Resolved Study of Light-Induced Ground-State Proton Transfer from an Acidic Medium to 4‑Nitrophenolate.

IF 4.3 Q2 CHEMISTRY, PHYSICAL

ACS Physical Chemistry Au Pub Date : 2025-07-28 eCollection Date: 2025-09-24 DOI:10.1021/acsphyschemau.5c00022

Leandro Scorsin, René A Nome, Ricardo F Affeldt, Fabiano S Rodembusch, Faruk Nome

引用次数: 0

Abstract

This work investigates the transient laser-induced formation of 4-nitrophenolate in the ground electronic state and its subsequent proton transfer with acetic acid and water. Laser flash photolysis in the UV-vis region revealed the presence of a deprotonated transient species even at weakly acidic pH. We measured the photoinitiated ground state protonation and deprotonation rate constants of 4-NPO^-/4-NPOH as a function of acetic acid, pH, and temperature. This study demonstrates a simple approach to analyzing fast competing bimolecular proton transfer reactions under nonequilibrium conditions in the ground state.

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光诱导基态质子从酸性介质转移到4 -硝基苯酚的时间分辨研究。

本文研究了基电子态瞬时激光诱导4-硝基苯酚的形成及其随后与乙酸和水的质子转移。在紫外-可见区，激光闪光光解发现即使在弱酸性pH下也存在去质子化的瞬态物质。我们测量了4-NPO-/4-NPOH的光引发基态质子化和去质子化速率常数与醋酸、pH和温度的关系。本研究展示了一种在基态非平衡条件下分析快速竞争双分子质子转移反应的简单方法。

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 Physical Chemistry Au 物理化学-

CiteScore

3.70

自引率

0.00%

发文量

期刊介绍： ACS Physical Chemistry Au is an open access journal which publishes original fundamental and applied research on all aspects of physical chemistry. The journal publishes new and original experimental computational and theoretical research of interest to physical chemists biophysical chemists chemical physicists physicists material scientists and engineers. An essential criterion for acceptance is that the manuscript provides new physical insight or develops new tools and methods of general interest. Some major topical areas include:Molecules Clusters and Aerosols; Biophysics Biomaterials Liquids and Soft Matter; Energy Materials and Catalysis