Antimicrobial new Schiff base polyesters: design, thermal, and structural characterizations

A Novel Method of Self-Cross-Linking of Syringaldehyde with Activated Methoxy Groups via Cross-Coupling for Lignin-Based Wood Adhesives

“…As shown in Figure a, the SA has a strong endothermic peak starting at approximately 106 °C, indicating the melting process that occurred in SA. This result is compatible with the reported result that the SA-based polymer showed an endothermic peak of SA . Moreover, lignin with the methoxy group has considerably lower melting temperatures .…”

“…This result is compatible with the reported result that the SA-based polymer showed an endothermic peak of SA. 37 Moreover, lignin with the methoxy group has considerably lower melting temperatures. 63 However, the A-SA reaction involving a nickel catalyst showed an endothermic peak at approximately 40 °C ( Figure 6 b), which is decreased compared to that of SA before modification.…”

“…SA is a naturally occurring compound with various bioactive characteristics that occur in lignin . Lignin provides a continuous, renewable, and cheap supply of SA . Hence, the SA model compound is a potential lignin compound with a methoxy group in two meta positions, due to numerous studies of SA depolymerization from lignin with stable conditions and high yield .…”

“… 36 Lignin provides a continuous, renewable, and cheap supply of SA. 37 Hence, the SA model compound is a potential lignin compound with a methoxy group in two meta positions, due to numerous studies of SA depolymerization from lignin with stable conditions and high yield. 38 SA has been studied for its biological effects using a semisynthetic method, 39 and the excellent performance of SA has indicated the application potential of this compound in thermoset polymer.…”

Synthesis, Characterization, and Evaluation of Antioxidant and Physical Properties of New Bifunctional Aromatic Monomers Containing Imine and Heterocyclic Rings in The Main Chain.

“…Schiff bases are a chemical compound category that contains an imine group (-CH═N-) in their structure. These materials are the initial components for creating a wide range of heterocyclic compounds 6,7. They are widely used with broad applications such as (8)(9)(10)(11)(12) Anticancer, Antimicrobial, Anti-corrosion, antibacterial, Antioxidant, Antifungal…etc. Monomers are distinguished from other organic compounds in their containing bi-functional groups instead of one.…”