Affiliation:
1. Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education) College of Chemistry and Chemical Engineering Hunan Normal University Changsha 410081 China
2. State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China
Abstract
AbstractTwo heterometallic Cu−Ca/Ba metal organic frameworks (MOFs), {[Ca(H2O)6][Cu6Ca2(mna)6(H2O)6] ⋅ 6H2O}n (1) and {[(Cu6Ba3(mna)6(H2O)8] ⋅ 6H2O}n (2), were synthesized by using 2‐mercaptonicotinic acid (H2mna) as ligand via liquid‐liquid diffusion method. The frameworks of compounds 1 and 2 are both adopts hexanuclear copper cluster of [Cu6(mna)6]6− as building units. In 1, the two‐dimensional (2D) structure is formed by the linkage between [Cu6(mna)6]6− and monomeric Ca2+, while the three‐dimensional (3D) framework of 2 is constructed by [Cu6(mna)6]6− and trimer of Ba2+. Furthermore, compounds 1 and 2 show excellent photoluminescence with red emitting around 700 nm. Luminescent studies reveal that 1 can serve as a probe for the rapid detection of Fe3+, Cr2O72− and CrO42− ions in water with remarkable selectivity even in the presence of other analogous ions.