Quinoline-based metal complexes: Synthesis and applications

[Display omitted] •A summarized and critical overview of recent advances in quinoline-based transition metal complexes.•The application of quinoline-based coordination complexes in organic synthesis, material, and medicinal chemistry is described.•The current review describes the coordination chemistry aspects of quinoline for different applications. Quinoline-based metal complexes have gained considerable attention in recent years due to their applications in various fields, including catalysis, material sciences, and medicinal chemistry. These complexes are characterized by their unique physicochemical properties, electronic arrangements, and stearic arrangements, which portray them as attractive for multiple applications. The coordination behaviour of quinoline moiety with different transition metals conceptualizes the basis of applying these complexes in diverse fields. Various reports from the scientific fraternity have focused on the same concept in past years. Herein, we have engrossed the developments and applications of quinoline-based coordination complexes. In the current review, the various aspects of quinoline-based coordination complexes have been discussed in the following five sections (i) quinoline-based coordination complexes with different transition metals that are isolated, characterized, and utilized for diverse catalytic applications; (ii) the complexes formed in situ via the coordination of quinoline-derivatives (substrates as well as ligands) with various metal ions under catalytic conditions; (iii) quinoline-based coordination complexes utilized in the field of material chemistry; (iv) biological applications of quinoline-based complexes arises due to the coordination properties; (v) and finally, the application of quinoline-based coordination complexes in sensing of various metal ions and bioimaging studies. Hence, the current compilation aims and elaborate on the coordination chemistry of quinoline-based complexes for their impact on diverse fields.