Synthesis, structure and properties of one novel hybrid supramolecular architecture based on macrocyclic assembly

Abstract

The novel α-Keggin heteropolyanion supramolecular compound based on organic ammonium and 18-crown-6, [(p-ClANH 3 )·(18-crown-6)] 3 ·(PMo 12 O 40 )·(CH 3 CN) ( 1 ), has been synthesized and characterized by single crystal X-ray diffraction, elemental analysis, IR, UV–vis, PXRD and 1 H NMR (p-ClANH 2 = p-chloroaniline). The rotator–stator assembly, [(p-ClANH 3 )·(18-crown-6)] + , was formed through dipolar donor–acceptor attractions, in which the guest p-ClANH 3 + cation was projected towards the host 18-crown-6 cavity by strong N H…O 18-crown-6 H-bonds. The extensive and effective intermolecular hydrogen bonds, among/between organic rotator–stator assemblies and α-Keggin (PMo 12 O 40 ) 3 − anion clusters, connected the structural units into a 3D supramolecular functional architecture. In addition, the thermal analysis (TGA and DSC) and luminescent properties were investigated. The rotator–stator assembly, [(p-ClANH 3 )·(18-crown-6)] + , was formed through dipolar donor–acceptor attractions, in which the guest p-ClANH 3 + cation was projected towards host 18-crown-6 cavity by strong N H…O 18-crown-6 H-bonds. The extensive and effective intermolecular hydrogen bonds, among/between organic rotator–stator assemblies and α-Keggin (PMo 12 O 40 ) 3 − anion clusters, connected the structural units into a 3D supramolecular functional architecture. ► Macrocyclic cation assembly was formed through dipolar donor-accepter attractions. ► Guest cation was projected towards the host 18-crown-6 cavity by strong H-bonds. ► Cation and anion clusters were connected into a 3D supramolecular architecture.