Crystal Structure of an Octanuclear Sandwich Cluster of Silver(I) and 4,4′‐Bis(2,5‐dimethylstyryl)biphenyl^†

Abstract

Reaction of the oligo(phenylenevinylene) 4,4'-bis(2,5-dimethylstyryl)biphenyl (bdb) with CF 3 CO 2 Ag in benzene gave a novel octanuclear sandwich cluster [Ag 8 (bdb) 2 (C 6 H 6 ) 2 (CF 3 CO 2 ) 8 ]•2C 6 H 6 (1). The clusters are packed on each other through strong π-π interactions to form 1D 'brick' chains, between which the solvated benzene molecules are located. TG analysis showed that cluster 1 could completely liberate the guest benzene molecules at 105 ℃ and the coordinated benzene molecules at 180 ℃. In solid state, cluster 1 exhibits fluorescence, and the emission band is red-shifted compared with that of free ligand bdb.