Syntheses, Crystal Structures and Luminescent Properties of Drum and Ladder-Like Organooxotin Clusters with Carbazole Ligand

Abstract

Four new Organooxotin Clusters: [(p-MeC6H4)Sn(O)L1]6 (1) (HL1 = 2-(9H-carbazol-9-yl)acetic acid), [PhSn(O)L2]6·2C6H6·2H2O (2) (HL2 = 3-(9H-carbazol-9-yl)propanoic acid), [n-BuSn(O)L2]6 (3), [(c-Hex2Sn)2(L1)O(OH)]2·3C6H6 (4), were synthesized with benzene being used as solvent in the reaction and characterized by elemental analysis, IR, NMR spectroscopy and X-ray crystallography diffraction analyses. Complexes 1–3 are hexanuclear organotin complexes with drum structure. Complex 4 is dimeric carboxylate tetraorganodistannoxane and shows a ladder structure. There are four crystallographically unique Sn centers in the structure of 4, which consists of a Sn4O2(OH)2 ladder unit, and the ladder consists of four tins held together by four µ3-oxygens. All the complexes show an extensive supramolecular organization in the solid state and form 1D or 2D supramolecular assembly mediated by C–H…O, C–H…π or π…π interactions. Moreover, complexes 1 and 4 exhibit good fluorescence properties in the solid state revealed by the luminescent investigation. The experimental results show the complexes may be explored for potential luminescent materials.