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A kind of luminescent metal-organic framework material based on PBP and polycarboxylic acid ligand and its preparation method and application

A technology of organic framework and polycarboxylic acid, which is applied in the field of luminescent metal-organic framework materials and their preparation, can solve problems such as no relevant reports, and achieve the effects of broad application prospects, high product purity and large quenching constant

Active Publication Date: 2022-04-05
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no relevant report on the construction of fluorescent sensors for LMOFs using multidentate N-containing 4-phenyl-2,6-bis(2'-pyrazinyl)pyridine (PBP) as a ligand for the detection of TNP.

Method used

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  • A kind of luminescent metal-organic framework material based on PBP and polycarboxylic acid ligand and its preparation method and application
  • A kind of luminescent metal-organic framework material based on PBP and polycarboxylic acid ligand and its preparation method and application
  • A kind of luminescent metal-organic framework material based on PBP and polycarboxylic acid ligand and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing a luminescent metal-organic framework material based on PBP and a polycarboxylic acid ligand, the specific steps are as follows:

[0024] (1) Weigh PBP (0.0156g, 0.05mmol), Zn(NO 3 ) 2 ·6H 2 O (0.0296g, 0.1mmol) and BTA (0.0254g, 0.1mmol), measure H 2 O (6mL), was added into the hydrothermal reaction kettle and stirred for 30min.

[0025] Wherein, PBP is 4-phenyl-2,6-bis(2'-pyrazinyl)pyridine, BTA is 1,2,4,5-benzenetetracarboxylic acid, and the structural formula of PBP is as follows:

[0026]

[0027] (2) Place the reaction kettle in an oven at 160°C for constant temperature reaction for 72 hours, and cool down to room temperature at a cooling rate of 2°C / h to obtain yellow blocky crystals, which are the luminescent metals based on PBP and polycarboxylic acid ligands -Organic framework material, denoted as {[Zn(PBP)(BTA) 0.5 ]·H 2 O} n Crystal with the molecular formula C 24 h 16 N 5 o 5 Zn.

[0028] Elemental analysis measured val...

Embodiment 2

[0037] Embodiment 2 crystal material {[Zn(PBP)(BTA) 0.5 ]·H 2 O} n Study on the Fluorescence Detection Performance of TNP

[0038] 3mg of {[Zn(PBP)(BTA) 0.5 ]·H 2 O} n Disperse in 30mL of DMF solution, after ultrasonic treatment for 45min, let it stand for 72h to form a stable suspension as a standard suspension, 5mmol of 2,4,6-trinitrophenol (TNP), dropwise added to {[Zn(PBP)(BTA) 0.5 ]·H 2 O} n of the DMF suspension, monitor and record the luminescence intensity. Such as figure 2 As shown, when the amount of TNP added to 50μL, {[Zn(PBP)(BTA) 0.5 ]·H 2 O} n The intensity of the fluorescence emission is almost completely quenched, and the quenching efficiency is about 95.5%.

[0039] The quenching efficiency of TNP was quantified using the Stern-Volmer formula: I 0 / I=1+K sv [M]. Such as image 3 Shown, {[Zn(PBP)(BTA) 0.5 ]·H 2 O} n Quenching constant for TNP (K sv ) is 5.221×10 4 m -1 . As shown in Table 3 below, {[Zn(PBP)(BTA) 0.5 ]·H 2 O} n K for...

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Abstract

The invention discloses a luminescent metal-organic framework material based on PBP and polycarboxylic acid ligands, its preparation method and application. The molecular formula of the material is C 24 h 16 N 5 o 5 Zn, the crystal system is triclinic, the space group is P-1, and the unit cell parameters are α=66.147°, β=79.039°, γ=75.230°, Z=2; the general chemical formula of the material is {[Zn(PBP )(BTA) 0.5 ]·H 2 O} n , wherein, PBP is 4-phenyl-2,6-bis(2'-pyrazinyl)pyridine, and BTA is 1,2,4,5-benzenetetracarboxylic acid. The luminescent metal-organic framework material can detect the aromatic nitro explosive 2,4,6-trinitrophenol with high sensitivity in DMF solution.

Description

technical field [0001] The invention belongs to the technical field of luminescent crystal materials, and in particular relates to a luminescent metal-organic framework material based on PBP and polycarboxylic acid ligands and its preparation method and application. Background technique [0002] Metal-organic frameworks (MOFs) are known for their designable structures, high surface area, and high porosity, which lend themselves to diverse applications such as gas storage / separation, luminescence, and catalysis. Structurally, MOFs are infinite structures composed of organic ligands and metal ions / clusters linked by coordination interactions. Therefore, the functions of MOFs are mainly attributed to the properties of organic ligands and metal centers. For example, by π-conjugated organic ligands and d 10 MOFs composed of metal centers have attracted extensive attention of researchers due to their excellent fluorescence properties. Due to the high selectivity and sensitivity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00G01N21/64
CPCC08G83/008G01N21/643G01N2021/6432
Inventor 陈爱华
Owner YANCHENG INST OF TECH
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