Design, Synthesis and Photoluminescence Sensing Property of a Ni‐Organic Material Achieved from 2,6‐Di(1H‐imidazol‐1‐yl) Naphthalene and Carboxylic Acid Ligands

Abstract

A new metal‐organic framework (MOF) compound, [Ni(L)(IDC)(H2O)] ⋅ 0.5 L (1), (H2IDC=4,4′‐iminodibenzoic acid), was synthesized by solvothermal reaction of 2,6‐di(1H‐imidazol‐1‐yl)naphthalene (L) and dicarboxylic acid ligands with nickel salt. The results of single crystal diffraction show that the framework belongs to the P21/c space group and has a unique infinite one‐dimensional (1D) chain structure. They are further linked together through imidazole interaction and finally form a three‐dimensional (3D) structure. The crystal structure was characterized by Powder X‐ray diffraction (PXRD), thermogravimetric analyses (TGA), infrared spectra (IR) and elemental analyses (EA). Meanwhile, the thermal stability and luminescence properties of the crystal were tested. It was found that 1 could recognize acetone molecules by luminescence quenching. It has proved itself an efficient sensor for acetone at low con‐centration.

Multi‐responsive Luminescent Probe with Bis‐imidazolyl Biphenyl and Aromatic Polycarboxylic Acids Ligands for Sensing Fe3+, Cr2O72− and CrO42− in Aqueous Solution

“…The fluorescence emission wavelength of the complex moves 14 nm in the short‐wave direction compared with the emission wavelength of the ligand LBIX. It can be known from the reported literature that this may be caused by the π‐π* transition and charge transfer within the LBIX ligand, as well as the coordination effect between metal ions and ligands [34,35] . The π‐π interaction in the complex reduces the non‐radiation energy loss and produces the blue shift phenomenon [36] .…”

“…It can be known from the reported literature that this may be caused by the π-π* transition and charge transfer within the LBIX ligand, as well as the coordination effect between metal ions and ligands. [34,35] The π-π interaction in the complex reduces the non-radiation energy loss and produces the blue shift phenomenon. [36] In addition, due to the d 10 electronic configuration of Zn(II) ion, it is difficult to be reduced and oxidized.…”

A Water‐Stable Luminescent Zn‐MOF Based on A Conjugated π‐electron Ligand as An Efficient Sensor for Fe3+, CrO42−, Cr2O72− and MnO4−

“…(Figure S3) The fluorescence emission maxima of the complex 1 , ligand LBTX were observed at 319 nm and 361 nm upon excitation at 239 nm and 284 nm, respectively, and the complex 1 has a blueshift fluorescence intensity than the auxiliary carboxylate ligands. (Figure S4) The emission wavelength of complex 1 is shifted to the short‐wave direction, which may be attributed to the π‐π* transitions and the LBTX intra‐ligand charge transfer, as well as the coordination effect between the metal ion and the ligand, respectively [41,42] . It is said that the π‐π in the complex acts as an energy trap, reducing non‐radiative energy loss and producing a blue shift phenomenon [43] .…”

Fluorene and Tetraphenylsilane Based Conjugated Microporous Polymer Nanoparticles for Highly Efficient Nitroaromatics Detection in Aqueous Media

“…The above methods require complex operations, or expensive equipment, or are inconvenient to carry. [15] Therefore, researchers have begun to focus on the photoluminescence (PL) sensing method, [16,17] because of its significant advantages such as sensitivity, selectivity, portability, and low cost. [18−20] Several materials have been developed for the application in PL sensing, such as metal-organic frameworks, [21−23] quantum dots, [24][25][26][27] covalent organic frameworks, [28,29] conjugated microporous polymers (CMPs) [30][31][32] and so on.…”

“…The above methods require complex operations, or expensive equipment, or are inconvenient to carry. [ 15 ] Therefore, researchers have begun to focus on the photoluminescence (PL) sensing method, [ 16,17 ] because of its significant advantages such as sensitivity, selectivity, portability, and low cost. [ 18−20 ]…”