附加在三芳胺支架上的多个硫酰基自由基

IF 1.1 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY
Sydney Reiber, Bennett Templeman-Vivian, Michelle Mills, Chris Tremblay, David Leitch, Erin Chernick
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引用次数: 0

摘要

本文报道了三个三苯胺基硫酰自由基的合成。这包括在N-Ar基团的4位(s)上的一、二和三(verdazyl),分别含有1、2和3个不成对电子。这些化合物都是空气稳定的,并通过EPR光谱、高分辨率质谱、红外光谱、UV/Vis光谱和循环伏安法进行了充分的表征。从紫外/可见吸光度数据中,发现三种含戊基化合物的光学吸光度能隙均为~2.35 eV。循环伏安法测定了单占据分子轨道(SOMOs)的能级,单、双、三(verdazyl)化合物的能级分别为-4.91 eV、-5.12 eV和-4.98 eV。自旋-自旋交换相互作用在二和三(verdazyl)s的EPR光谱中都被观察到,导致额外的超精细耦合模式和基态分别被分配为三重态和四重奏态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multiple Verdazyl Radicals Appended to a Triarylamine Scaffold
We report the synthesis of three triphenylamine-based verdazyl radicals. These include a mono, bis, and tris(verdazyl) at the 4-position(s) of the N–Ar groups, containing one, two, and three unpaired electrons, respectively. Each of these compounds is air stable, and fully characterized using EPR spectroscopy, high-resolution mass spectrometry, infrared spectroscopy, UV/Vis spectroscopy, and cyclic voltammetry. From the UV/Vis absorbance data, the optical absorbance energy gaps were found to be ~2.35 eV for all three verdazyl-containing compounds. Cyclic voltammetry was used to estimate the energy levels of the singly occupied molecular orbitals (SOMOs), which are -4.91 eV, -5.12 eV, and -4.98 eV for mono, bis, and tris(verdazyl) compounds respectively. Spin-spin exchange interactions were observed in the EPR spectra of both the bis and tris(verdazyl)s, leading to additional hyperfine coupling patterns and assignment of the ground states as triplet and quartet, respectively.
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来源期刊
Canadian Journal of Chemistry
Canadian Journal of Chemistry 化学-化学综合
CiteScore
1.90
自引率
9.10%
发文量
99
审稿时长
1 months
期刊介绍: Published since 1929, the Canadian Journal of Chemistry reports current research findings in all branches of chemistry. It includes the traditional areas of analytical, inorganic, organic, and physical-theoretical chemistry and newer interdisciplinary areas such as materials science, spectroscopy, chemical physics, and biological, medicinal and environmental chemistry. Articles describing original research are welcomed.
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