Abstract
Abstract The luminescent metal–organic frameworks (LMOFs) have been widely used as sensors for toxic organic compounds or heavy metals due to their functional sites and accessible pores. About this work, a new luminescent metal–organic framework, {[Cd3(L)2(H2O)4]·4H2O}n (1) has been synthesized through the spontaneous self-assembly of V-shaped asymmetrical tricarboxylate ligand (H3L = 2-(4-carboxylphenoxy)terephthalic acid) and Cd(NO3)2·4H2O under hydrothermal condition. Single crystal X-ray diffraction analysis H3L is completely deprotonated and connects Cd(II) to exhibit a 3D microporous structure. Furthermore, the complex shows a strong fluorescence emission, and can act as a potential multifunctional fluorescent probe for detection of nitroaromatic, Fe3+, Cr2O72− and CrO42− anions with high stability, selectivity and sensitivity. Secondly, the complex can effectively sensitize visible-light-emitting Tb3+ ions as an antenna and rapidly remove harmful organic dye Methylene Blue (MB) as an adsorbent. Thus, the multifunctional complex 1 combines optical-sensing, adsorption, and sensitization properties, which is very useful in many potential applications.
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