INOR 291 |
| We aim to achieve gigantic coordination networks using dendritic, star-shaped thioether (selenoether) molecules as key building blocks. The generic issue is to integrate organic synthesis into the study of solid state systems, and push the length scale of coordination networks into the nanoscopic domain of protein crystals. For this, we look to a group of versatile molecules with branchy shapes. For example, the 1,3,6,8-tetrakis(phenylseleno)pyrene molecule (L1) coordinates with AgSbF6 to provide a robust 3D [topology: (10, 3)-a] porous chiral network based on trimeric building blocks. Each trimeric building block is rather complex, and consists of three pairs of L1 molecules integrated through the Ag+ ions into a circular unit. The circular, trimeric units function as the three-connected nodes, which are further connected through the Ag+ ions to generate the (10,3)-a topology. The porous feature of the network might potentially allow for effective absorption of a wider range of guest molecules. In another example, tris{[3,4,5-tris(methylthio)phenyl]ethynyl}phenylamine (L2) is interacted with AgBF4 to provide 2D [topology: (6.3)] honeycomb network based on multiple thioether-Ag+ ions coordination interactions. The single crystal structure indicates that about half of the unit cell volume (47%) is occupied with solvent molecules. And the porous network features the distinct changes in the fluorescent emissions, compared with the ligand, providing a promising material for solid state fluorescent sensing. |
|
Solid State Chemistry
7:00 PM-10:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Inorganic Chemistry |