Two photoluminescent metal–organic frameworks based on a BODIPY-derived bipyridine ligand

• Published in: CrystEngComm Vol. 15; no. 36; pp. 7315 - 7320
• Main Authors: Zhou, Lian, Xue, Yun-Shan, Xu, Yan, Zhang, Jun, Du, Hong-Bin
• Format: Journal Article
• Language: English
• Published: 01.01.2013
• Subjects: Carbon dioxide; Clusters; Excitation; Ligands; Metal-organic frameworks; Photoluminescence; Pillars; Porosity; Three dimensional
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/c3ce41002a

Two new metal-organic open frameworks (MOFs) [Zn sub(3)L sub(2)(btc) sub(2)(H sub(2)O)].(guests) (1), [CdL(bdc)].(guests) (2), were successfully prepared by using a photoluminescent BODIPY-based bipyridine linker, L, and auxiliary ligands 1,4-benzenedicarboxylate (H sub(2)bdc) and 1,3,5-benzenetricarboxylate (H sub(3)btc), respectively. MOF 1 has a 2-fold interpenetrating three-dimensional (3D) framework with an 8-connecting body centered cubic (bcu) net, built upon a paddlewheel cluster [Zn sub(2)(O sub(2)CR) sub( 4)], a tetrahedrally connecting Zn and a 3-connected btc super(3-) ligand. MOF 2 has a highly open framework with a kagome-type net. It is a pillared layered structure made of 2D [Cd(bdc)] kagome sheets and L as pillars. MOF 1 was shown to exhibit permanent porosity and adsorption of N sub(2), H sub(2), CO sub(2) and CH sub(4). Both MOFs exhibited strong photoluminescent emissions at room temperature with peaks at 540 nm upon excitation, owing to a ligand L-based excited state.