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Synfacts 2020; 16(03): 0285
DOI: 10.1055/s-0039-1690381
Synthesis of Materials and Unnatural Products
© Georg Thieme Verlag Stuttgart · New York

Gold-Digging Polythioamides via Sulfur, Acid and Amine Polymerization

Contributor(s):
Timothy M. Swager
,
Alberto Concellón
Cao W, Dai F, Hu R. * Tang BZ. South China University of Technology, Guangzhou, P. R. of China
Economic Sulfur Conversion to Functional Polythioamides through Catalyst-Free Multicomponent Polymerizations of Sulfur, Acids, and Amines.

J. Am. Chem. Soc. 2020;
142: 978-986
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Publication History

Publication Date:
18 February 2020 (online)

 
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Key words

multicomponent polymerization - polythioamides - sulfur

Significance

Sulfur-containing polymers are attractive materials because of their fascinating properties such as metal coordination ability, high refractive indices, and semiconducting properties, etc. In this article, a catalyst-free, multicomponent polymerization of elemental sulfur, dicarboxylic acids, and diamines is developed to produce polythioamides with well-defined structures, high molecular weights (M w≈ 15–85 kDa), and high yields (69–95%).


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Comment

Elemental sulfur utilization is a global concern because of its large production from the petroleum refine industry (ca. 80 million tons per year) and its limited application. Therefore, it is a great choice to use elemental sulfur in this multicomponent polymerization. Moreover, these polythioamides can be applied in gold recovery as a consequence of the strong coordination between thioamide groups and Au3+. Efficient extraction of Au3+ from a practical acid leaching solution of electronic waste directly affords high-purity elemental gold after pyrolysis.


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