Development of ultrathin polyamide nanofilm with enhanced inner-pore interconnectivity via graphene quantum dots-assembly intercalation for high-performance organic solvent nanofiltration was written by Shen, Qin;Lin, Yuqing;Zhang, Pengfei;Segawa, Jumpei;Jia, Yuandong;Istirokhatun, Titik;Cao, Xingzhong;Guan, Kecheng;Matsuyama, Hideto. And the article was included in Journal of Membrane Science in 2021.Formula: C20H6I4Na2O5 This article mentions the following:
In this study, a high-performance organic solvent nanofiltration (OSN) membrane is engineered via nanoscale aminated graphene quantum dots (GQDNH2)-mediated interfacial polymerization The GQDNH2, featuring favorable amine monomers, can atomically regulate the diffusion rate at the interface, yielding nanofilms with controllable thickness (decreasing from 200 to 100 nm). Furthermore, the zero-dimensional GQDscNH2 can serve as nanospacers to increase the inner-pore interconnectivity with loose internal architecture, while preserving the narrow free volume distribution via covalent interactions with the rubbery polymeric matrix. An improvement in solvent separation property is achieved, where the best-performing GQDscTH2@PA thin-film nanocomposite (TFN) membrane reaches a magnitude of 2.6-fold higher than that of the pristine polyamide (PA) membrane without significantly compromising its rejection toward organic solvation macro/micromols. solutes, exhibiting high solvent permeances for mild solvents (such as 11.1 L m-2 h-1·bar-1 for methanol) and aggressive solvents (such as 5.9 L m-2 h-1·bar-1 for dimethylformamide), performing a competitive perm-selectivity among the state-of-the-art OSN membranes. The long-term operations (140 h) demonstrated the excellent stability of the nanocomposite membranes. We herein report the development of TFN membrane with thin and loose architecture for highly efficient organic solvent-based separation process. In the experiment, the researchers used many compounds, for example, Sodium 2′,4′,5′,7′-tetraiodo-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-bis(olate) (cas: 16423-68-0Formula: C20H6I4Na2O5).
Sodium 2′,4′,5′,7′-tetraiodo-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-bis(olate) (cas: 16423-68-0) belongs to benzofurans derivatives. Benzofuran is the “”parent”” of many related compounds with more complex structures. For example, psoralen is a benzofuran derivative that occurs in several plants. Benzofurans have also made significant and distinctive contributions to biology. They exhibit several biological activities that range from antiviral, antimicrobial, antitumor, anti-inflammatory.Formula: C20H6I4Na2O5
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem