Synthesis of macrocyclic compounds by utilizing metal complexation,their structure and function

摘要

Construction of macrocyclic and macrobicyclic compounds by utilizing corrdinate bonds in one of the most fascinating current topics in supramolecular chemistry.A variety of valency of the metal ions and direction of the bonds are available according to combination of the ligands and the metals,Many metal complexes are known to catalyze chemical reactions.Thus,various molecules with work not only as a host but also as a catalyst can be designed on the basis of the strategy described above.Linear or branched moelcules containing a suitable ligand at ends of the chains are coverted to the corresponding preudocrown ethers,pseudocyptands and pseudocyclophanes by complexation with a metal ion to result in an allosteric effect on the guest binding.Molecular assembling by corrdinate bonding is another excellent way to yield metallo-mayocycles.The structure and function of the complexes can be modulated by reaction conditions,additional ligands,etc.