Coordination-driven self-assembly of discrete supramolecular double-metallacycles.

In the past few decades, the construction of discrete supramolecular double-metallacycles has attracted wide interest because of their unique structures and their potential applications in photoelectric materials. Since some progress has been made in this area, it is time to summarize the progress of discrete supramolecular double-metallacycles. In this review, we will briefly introduce the synthetic strategy of discrete supramolecular double-metallacycles. In addition, we will discuss the design principles, preparation methods, optical properties, and functions of these discrete supramolecular double-metallacycles.