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基于苯乙烯配体的铁（II）配合物的还原电聚合及电致变色性能

Reductive Electropolymerization and Electrochromism of Iron(II) Complex with Styrene-Based Ligand.

作者信息

Napierała Sergiusz, Muras Kacper, Dutkiewicz Grzegorz, Wałęsa-Chorab Monika

机构信息

Faculty of Chemistry, Adam Mickiewicz Unversity in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.

出版信息

Materials (Basel). 2021 Aug 25;14(17):4831. doi: 10.3390/ma14174831.

DOI:10.3390/ma14174831
PMID:34500920
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8432686/
Abstract

The benzimidazole-based ligand containing polymerizable styrene group has been prepared via condensation of picolinaldehyde derivative containing styrene moiety and benzimidazole-based hydrazine. The ligand reacted with iron(II) tetrafluoroborate and iron(II) trifluoromethanesulfonate giving red-brown complexes of Fe(II) ions of formula [Fe]X, where X = CFSO () or BF (). Reductive electropolymerization was used to obtain a thin layer of the polymeric complex, . Further investigation of electrochemical properties of the compound by cyclic voltammetry showed two quasi-reversible redox processes assigned to electrooxidation and electroreduction of the polymer. Spectroelectrochemical measurements confirmed that the polymer undergoes the color changes during oxidation and reduction process. The polymer in its neutral state (Fe(II)) is yellow and it exhibits absorption band at 370 nm, after oxidation to Fe(III) state absorption band shifts to 350 nm and the polymer is almost colorless. While the metal ions are reduced to Fe(I) absorption band at around 410 nm has been observed and the polymer changed its color to intense yellow. The stability of the polymer during multiple oxidation/reduction cycles has also been investigated.

摘要

通过含苯乙烯部分的吡啶甲醛衍生物与基于苯并咪唑的肼缩合，制备了含可聚合苯乙烯基团的基于苯并咪唑的配体。该配体与四氟硼酸铁（II）和三氟甲磺酸铁（II）反应，生成式为[Fe]X的Fe（II）离子的红棕色配合物，其中X = CFSO（）或BF（）。采用还原电聚合法获得聚合物配合物的薄层。通过循环伏安法对该化合物的电化学性质进行进一步研究，结果表明存在两个准可逆氧化还原过程，分别归因于聚合物的电氧化和电还原。光谱电化学测量证实，该聚合物在氧化和还原过程中会发生颜色变化。处于中性状态（Fe（II））的聚合物为黄色，在370 nm处有吸收带，氧化为Fe（III）状态后，吸收带移至350 nm，聚合物几乎无色。当金属离子还原为Fe（I）时，在约410 nm处观察到吸收带，聚合物颜色变为深黄色。还研究了该聚合物在多个氧化/还原循环中的稳定性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/0ea25ba674d6/materials-14-04831-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/b78429a04965/materials-14-04831-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/4c28af688808/materials-14-04831-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/e241254bbc03/materials-14-04831-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/9dbec8f229c6/materials-14-04831-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/29215293aea5/materials-14-04831-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/0ea25ba674d6/materials-14-04831-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/b78429a04965/materials-14-04831-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/9cbe727d3305/materials-14-04831-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/34b800d8815a/materials-14-04831-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/4c28af688808/materials-14-04831-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/e241254bbc03/materials-14-04831-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/9dbec8f229c6/materials-14-04831-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/29215293aea5/materials-14-04831-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c9b/8432686/0ea25ba674d6/materials-14-04831-g008.jpg

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