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Crystal Structures and Luminescence of Two Cadmium‐Carboxylate Cluster‐based Compounds with Mixed Ligands
Author(s) -
Ma HuiFang,
Lei Qian,
Wang YuLing,
Yin ShunGao,
Liu QingYan
Publication year - 2017
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201700020
Subject(s) - carboxylate , luminescence , ligand (biochemistry) , chemistry , solvent , crystallography , photoluminescence , bridging ligand , crystal structure , cluster (spacecraft) , cadmium , stereochemistry , materials science , organic chemistry , receptor , biochemistry , optoelectronics , computer science , programming language
Reactions of Cd(NO 3 ) 2 · 4H 2 O with 2‐quinolinecarboxylic acid (H‐QLC) in the presence of 1,4‐benzenedicarboxylic acid (H 2 ‐BDC) or 1,3,5‐benzenetricarboxylic acid (H‐BTC) in DMF/H 2 O solvent afforded two compounds, namely, [Cd(QLC)(BDC) 1/2 (H 2 O)] 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 Cd 2 (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 BDC 2– to form a 2D structure. Compound 2 is constructed from unique hexanuclear macrometallacyclic Cd 6 (QLC) 6 clusters, which are linked by the surrounding BTC 3– 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.