In this study, a Cu‐Schiff base complex supported on highly ordered mesoporous silica MCM‐41 was successfully prepared to form a heterogeneous catalyst. The structural and textural properties of the newly prepared catalyst were determined by various microscopic and spectroscopic techniques such as FT‐IR, BET, TGA, DRS UV‐vis, EDX, XPS, ICP‐OES, XRD, and TEM. The catalyst was used in the N‐arylation of various amines through formation of intramolecular C(aryl)‐N bond from the relevant aryl halides (Ar−I and Ar−Br) with amines by coupling reactions of Ullmann type. The significant advantages of this protocol were generality, low metal content, high yield of products, and simple work‐up procedure. Moreover, the catalyst could be recycled efficiently for seven runs without any appreciable decrease in reactivity and no leaching of copper was found during this course.

The article discusses the synthesis of a novel biodegradable poly(ester-imide) (PEI) based on L-alanine, utilizing N-trimellitylimido-L-alanine diacid and curcumin. The degradation tests of polymer in Tris-Hcl buffer at 37.5 C after 2 weeks showed a decrease in average molecular weight from 2.38 Â 10 4 to 1.85 Â 10 4 , which confirms the biodegradability of PEI. The PEI was further enhanced through in situ polymerization with reinforcing nanoparticles, rGO, and rGO-EDA. Various characterization techniques were employed to evaluate the synthesized polymer and composites, including NMR, elemental analysis, FT-IR, thermogravimetric analysis (TGA), and X-ray diffraction (XRD). PEI composites exhibited higher thermal stability than pure PEI. Tensile strength also improved significantly, with increases of 29.55% and 87.42% for rGO and rGO-EDA compared to pure PEI. We suggest that these polymers have tunable properties, which may potentially be considered for biodegradable polymer scaffolds.