文献类型：期刊文献

英文题名：Facile synthesis and properties of thioamide-containing polymers

作者：Zhang, Hongqing[1];Wang, Huazhang[1];Xia, Longgang[1];Du, Xinghao[1];Feng, Chun[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2025

卷号：16

期号：38

起止页码：4261

外文期刊名：POLYMER CHEMISTRY

收录：;EI(收录号：20254119279233);WOS:【SCI-EXPANDED(收录号:WOS:001564343400001)】；

基金：The authors are thankful for financial support from National Natural Science Foundation of China (U22A20131 and 52361165657).

语种：英文

外文关键词：Amides - Catalysts - Chlorine compounds - Computer software reusability - Functional materials - Gold compounds - Hydrogen bonds - Low temperature production - Metal ions - Metal nanoparticles - Refractive index - Solubility - Sulfur

摘要：Polythioamide, a variant of polyamide in which the carbonyl oxygen atom is replaced with sulfur, shows stronger metal affinity, weaker hydrogen-bonding interactions with water, and higher refractive indices in comparison with its counterpart polyamide. The development of efficient, versatile and economical strategies to prepare polythioamides along with gaining much deeper insights into their structure-property relationships, is crucial for creating new polythioamide-based functional materials. In this work, we describe a convenient and efficient platform to generate a variety of polythioamides. The commodity polymers poly(N-isopropylacrylamide) (PNIPAM), poly(N,N-dimethylacrylamide) (PDMA), poly(vinylpyrrolidone) (PVP) and polyurethane (PU), which have high-volume and low-cost production, can be readily thionated using commercially available Lawesson reagent to convert the amides to thioamides in a controlled manner with negligible chain degradation or crosslinking. For thionated PNIPAM, a higher level of thionation leads to a higher glass transition temperature and a lower decomposition temperature. The thionation of PNIPAM decreases its solubility in water. The LCST of thionated PNIPAM with 16% thioamide content decreases to 13 degrees C, and thionated PNIPAM with >= 44% thioamide content cannot be dissolved in water at temperatures as low as 0 degrees C. The addition of the metal ions Ag+, AuCl4- and Hg2+ increases the solubility of thionated PNIPAM owing to the strong coordinating capacity of thioamides toward Ag+, AuCl4- and Hg2+. Metal nanoparticles, for example, Ag and Au nanoparticles, can be embedded in thionated PU foams, which can be employed as reusable catalysts for the reduction of 4-nitrophenol to 4-aminophenol. This study provides an efficient and versatile platform and important guidelines for developing thioamide-containing polymers for diverse applications.