摘要:
IntroductionCrystal engineering and construction of coordination networks with fascinating structural topologies has attracted great attention in recent years due to the potential of these compounds as functional materials.1Concurrent with this has been the development of multidimensional networks based primarily upon linking metal centers with rigid bridging components, such as 4,4′bipyridine,etc.2Far less common has been the use of flexible bridging units in the construction of extended networks,3,4which are attractive because the flexibility and conformation freedoms of such ligands can offer the possibility for the construction of unprecedented frameworks with useful properties.Herein is reported the first Agicomplex with a flexiblemesobis(sulfinyl) ligand (L) forming a unique macrometallacyclic lamellar network.The underlying principle of this study design is as follows. Bis(sulfinyl) compounds have advantages that: (a) they are bifunctional ligands in terms that both S and O atoms are potential donor atoms and they have ditopic coordination sites which may allow structures with higher dimensions; (b) each S atom with a pyramidal geometry is an asymmetric center which may introduce acentric sites into the resulting crystals [for example, if ligands with anRSconfiguration were used (as in this study), the resulting network as a whole would be mesomeric; however, if ligands withRRorSSconfigurations were used, one would expect to obtain chiral networks with acentric cavities]; (c) such structurally flexible ligands have the possibility of forming diverse extended networks which might be deeply influenced and controlled by the length of the spacer unit and the template anions; and (d) the bis(sulfinyl)ligands having ditopic donor sites (S and O), of which the chemistry is still less developed, are likely to be widely relevant in the context of a vast variety of metal moieties and may be expected to develop into a rich coordination chemistry.
ISSN:1466-8033
DOI:10.1039/b105297g
出版商:RSC
年代:2001
数据来源: RSC