A unique multifunctional cluster-based nano-porous Terbium organic material: Real-time detection of benzaldehyde, visually luminescent sensor for nitrite and selective high capacity capture of Congo Red

• DOI: 10.1016/j.dyepig.2017.07.044
• Publication Date: 2017-07-20T17:31:40Z
• Authors: Bin Ding; Yue Cheng; Jie Wu; Xiao Man Wu; Hui Min Zhang; Yan Luo; Xue Fang Shi; Xiang Xia Wu; Jian Zhong Huo; Yuan Yuan Liu; Yan Li
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract In this work one rigid asymmetrical tricarboxylate ligand p-terphenyl-3,4″,5-tricarboxylic acid (H3L) ligand has been synthesized, one unique nano-porous Terbium luminescent metal-organic framework {[Tb(L)(H2O) (DMF)]·DMF}n (1) has been prepared using solvo-thermal techniques. Structural analysis demonstrated that these di-nuclear Tb2O2 clusters are bridged via rigid ter-phenyl backbones of L3− generating one unique three-dimensional(3D) cluster-based nano-porous framework of 1. In 1 nano-porous channels with dimensionality of 9.788(1) A × 19.209(3) A can be found along the crystallographic a direction. According to a PLATON calculation, there exists approximately 33.7% of the crystal volume (6286.8 A3 potential solvent areas) accessible to guest molecules. Powder X-ray diffraction (PXRD) determination also confirms pure phases of 1. Photo-Luminescent experiments suggested that 1 shows real-time sensitive sensing for benzaldehyde. Addition of only 1 μl benzaldehyde to ethanol emulsion of 1, the resulting emission intensity was attenuated by approximately 52.07%. It is also noted that the fluorescent intensity of 1 can be efficiently resumed through the fast and simple technique of washing the benzaldehyde-1 sample by water. Meanwhile 1 also showed high selectivity, fast detection time (