Crystal Structures and Luminescence of Two Cadmium‐Carboxylate Cluster‐based Compounds with Mixed Ligands |
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| Authors: | Hui‐Fang Ma Qian Lei Yu‐Ling Wang Shun‐Gao Yin Qing‐Yan Liu |
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| Institution: | 1. College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, Jiangxi, P. R. China;2. +86‐91‐88336372 |
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| Abstract: | Reactions of Cd(NO3)2 · 4H2O with 2‐quinolinecarboxylic acid (H‐QLC) in the presence of 1,4‐benzenedicarboxylic acid (H2‐BDC) or 1,3,5‐benzenetricarboxylic acid (H‐BTC) in DMF/H2O solvent afforded two compounds, namely, Cd(QLC)(BDC)1/2(H2O)]n ( 1 ) and Cd(QLC)(BTC)1/3]n ( 2 ). Both compounds are two‐dimensional (2D) frameworks but feature different cadmium‐carboxylate clusters as a result of the presence of the polycarboxylate ligands with different geometries and coordination preference. The dinuclear Cd2(QLC)2 units in 1 are bridged by the pairs of bridging water ligands to give a one‐dimensional (1D) chain, which is further linked by the second ligand of BDC2– to form a 2D structure. Compound 2 is constructed from unique hexanuclear macrometallacyclic Cd6(QLC)6 clusters, which are linked by the surrounding BTC3– ligands to generate a 2D structure. Photoluminescence studies showed both compounds exhibit ligand‐centered luminescent emissions with emission maxima at 405 and 401 nm, respectively. |
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| Keywords: | Cadmium‐carboxylate cluster 2‐Quinolinecarboxylate 1 4‐Benzenedicarboxylate 1 3 5‐Benzenetricarboxylate Luminescence |
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