石墨氮化碳
离子液体
催化作用
氮化碳
材料科学
表面改性
醛
碳纤维
剥脱关节
化学工程
离子键合
介孔材料
化学
有机化学
纳米技术
石墨烯
离子
光催化
复合数
复合材料
工程类
作者
Najmedin Azizi,Navid Habibnejad,Tahereh Soleymani Ahooie
标识
DOI:10.1016/j.molliq.2022.120625
摘要
Graphitic carbon nitride (g-C3N4) has a layered structure similar to graphite and presents exciting and unique support in organic transformations. Using the edge-functionalized graphitic carbon nitride by doping it with various functional groups and transforming it into another morphology has become the center of attention in the recent decade. It has a nitrogen-rich structure with weak base properties; therefore, it must improve its properties with various functionalization. Herein, for the first time, template-free ionic carbon nitride nanotubes (K-g-C3N4) were created via thermal polymerizing and aqueous alkaline liquid-phase exfoliation. The characterization of alkaline K-doped ionic graphitic carbon nitride (K-g-C3N4) was determined by FT-IR, SEM, EDS, and TGA analysis. A simple, facile, and efficient synthesis of 2-amino-5-alkylidene-thiazol-4-ones derivatives via a multicomponent reaction of various aldehyde, amines, and rhodanine in ethanol using a reusable K-g-C3N4 as a green catalyst has been developed. The reaction scope was explored by varying the structures of aldehydes and amines with rhodamine. Various 2-amino-5-alkylidene-thiazol-4-ones were established in yields ranging between 65 and 96% for 60–180 min. Due to the heterogeneous nature of K-g-C3N4, the catalyst could be recovered by centrifugation and reused in five cycles without a decrease in catalytic activity. Operational simplicity, facile fabricable catalyst, broad substrate scope, readily available starting materials, nontoxic, highly stable, environment-friendly catalyst and solvent, suitable to excellent yields, and simple work-up are the prominent features of this methodology.
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