X-ray crystal structure and theoretical study of a new dinuclear Cu(II) complex with two different geometry centers bridged with an oxo group

Biological Applications of Macrocyclic Schiff Base Ligands and Their Metal Complexes: A Survey of the Literature (2005–2019)

“…[35,36] A large variety of [1 + 1] and [2 + 2]-(macrocyclic) ligands has been synthesized in order to ascertain correctly the role of the different coordinating atoms and of their relative position on the structures resulting from coordination of these ligands to metal ions. [35][36][37][38][39][40][41][42][43][44][45][46] These studies also aimed to understand the factors that most contribute to determine the number and size of the chelating rings formed upon complexation of Schiff base macrocyclic ligands, as well as the effects of the flexibility and shape of the coordinating moiety on binding. [36,[47][48][49][50] Progress on the chemistry dedicated to the synthesis of these type of Schiff bases has allowed, for example, the preparation of macrobicyclic ligands via a one-step multiple condensation reactions procedure.…”

“…In fact, one of the most popular methods for the synthesis of macrocyclic Schiff bases requires the active participation of a metal ion in the process, i.e., the metal-promoted one-step (template) condensation method. [41][42][43][44][45] In this synthetic procedure, a metal ion is used as template to induce orientation of the reacting groups of linear substrates in the required conformation for the ring to close. [59] In this way, one has direct access to macrocyclic Schiff base metal complexes, whose practical applications are, as already mentioned, relevant in many different domains.…”

“…[35,72] Alternatively, they can be obtained in a single step by the already mentioned metal-template procedure. [41][42][43][44][45]59] In some cases, the initially synthesized complexes can be converted in other species through transmetalation reactions, leading to species otherwise not accessible to synthesis. [72] Template and transmetalation reactions quite often give rise to the desired complexes in high-yield and in a satisfactory purity grade.…”

Selective and Sensitive Two New Macroacyclic Schiff base Fluorescent Turn‐Off Receptors for Fe3+, DFT Calculation and Their Antibacterial Activity

“…Various Schiff bases having divers backbones with potent biological activities have been explored and synthesized by various research groups . They play a key role in the development of coordination chemistry, resulting in an enormous number of publications, ranging from pure synthetic work to modern physicochemical and biochemically relevant studies of metal complexes …”