A novel (4,6)-connected 3D metal-organic framework based on chelidamic acid: Synthesis, crystal structure and photoluminescence

Abstract The aqueous solution reaction of chelidamic acid (H 3 CAM), succinic acid, CdCl 2 ·2.5H 2 O in the air at 50 °C, along with little of ammonia added dropwise, gave rise to colorless crystals {Cd 2.5 (CAM)(HCAM)(H 2 O) 7 ·1.5H 2 O} n ( 1 ), which presents an interesting (4,6)-connected 3D structure. Notably, 1 is the third homonuclear 3D framework based on H 3 CAM ligand, which acts as two different μ 4 / μ 5 -bridges in 1 and was abbreviated to HCAM 2 − and CAM 3 − , respectively, in writing molecular formula of 1 . Polymer 1 exhibits strong blue photoluminescence at room temperature.