β-nitrostyrene as a novel spectroscopic probe for measuring nucleophilicity

IF 4.6 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-10-04 DOI:10.1016/j.saa.2025.127014

Meysam Aryafard , Mahfam Chalaki , Mohammadjavad Jahanshahi , Elham Ghanbarnezhad Baniani

引用次数: 0

Abstract

A new probe for measuring nucleophilicity was introduced. The kinetics of various species with β-nitrostyrene (NS) as an electrophile was studied in methanol at room temperature. All measurements were performed by scanning the UV absorptions of NS as a probe scale. The novelty of probe, and method solve the difficulties in measuring the nucleophilicity and show interesting findings for primary, secondary amines, thiols, and salts. The results are helpful to find the reaction rates, mechanisms, and pathways based on the nature of the nucleophiles. The solvents parameters, including hydrogen bond donor/acceptor, polarizability and dipole moments of the solvents were considered in the analysis of the measurements. This work shows that nucleophilicity is mainly influenced by the type of nucleophiles.

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β-硝基苯乙烯作为一种测量亲核性的新型光谱探针。

介绍了一种测量亲核性的新型探针。研究了以β-硝基苯乙烯（NS）为亲电试剂的各种物质在甲醇中室温下的动力学。所有测量都是通过扫描NS的紫外吸收作为探针尺度进行的。新颖的探针和方法解决了测量亲核性的困难，并显示了伯胺，仲胺，硫醇和盐的有趣发现。这些结果有助于根据亲核试剂的性质确定反应速率、机理和途径。溶剂参数包括氢键供体/受体、极性和偶极矩。研究表明亲核性主要受亲核试剂类型的影响。

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

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.