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CN-121991377-A - CPN-Y2-Cl cation framework material and preparation method and application thereof

CN121991377ACN 121991377 ACN121991377 ACN 121991377ACN-121991377-A

Abstract

The application discloses a CPN-Y2-Cl cation framework material, a preparation method and application thereof. CPN-Y2-Cl cation frame material is prepared by quaternization reaction of tetra (1-imidazolyl) ethylene and 5,5 '-bromomethyl-2, 2' -bipyridine and anion exchange. The material has rapid and efficient adsorption performance on I 3 ‑ in water phase, and still shows good selectivity in the presence of various competing anions. Meanwhile, the material has obvious fluorescence quenching in the process of acting with I 3 ‑ , so that the rapid detection of I 3 ‑ in water can be realized. The material designed by the application has stable performance and simple preparation process, and the prepared organic cation frame material has double functions of adsorption and fluorescence identification, and has wide application prospect in the fields of treatment and real-time monitoring of radioactive iodine polluted water.

Inventors

  • LOU XIAOMING
  • CAO YIYAO
  • REN HONG
  • WU TIANYI
  • ZOU HUA

Assignees

  • 浙江省疾病预防控制中心(浙江省预防医学科学院)

Dates

Publication Date
20260508
Application Date
20260409

Claims (10)

  1. 1. The CPN-Y2-Cl cation framework material is characterized by comprising the following chemical structural formula: 。
  2. 2. A method for preparing a CPN-Y2-Cl cation framework material, which is characterized by comprising the following steps: quaternizing tetra (1-imidazolyl) ethylene and 5,5 '-bromomethyl-2, 2' -bipyridine to obtain a synthetic product; and (3) replacing the synthesized product with saturated sodium chloride to obtain the CPN-Y2-Cl cation framework material.
  3. 3. The method for preparing CPN-Y2-Cl cation framework material according to claim 2, wherein the mass ratio of tetra (1-imidazolyl) ethylene to 5,5 '-bromomethyl-2, 2' -bipyridine is 1 (1.1-1.2).
  4. 4. The method for preparing the CPN-Y2-Cl cation frame material according to claim 2, wherein the temperature of the quaternization reaction is 85-100 0 C, and the quaternization reaction time is 3-h.
  5. 5. The method for preparing CPN-Y2-Cl cation framework material according to claim 2, wherein the synthetic product is pale yellow CPN-Y2-Br, and has the following chemical structural formula: 。
  6. 6. the method for preparing CPN-Y2-Cl cation framework material according to claim 2, wherein said synthetic product is subjected to saturated sodium chloride substitution and immersed in saturated sodium chloride solution for 12-24 hours.
  7. 7. A CPN-Y2-Cl cation framework material, characterized by being prepared according to the preparation method of any one of claims 2-6.
  8. 8. Use of a CPN-Y2-Cl cation framework material according to claim 1 or 7 in the treatment of radioactive iodine-contaminated water.
  9. 9. A method for adsorbing polyiodide ions from a radioactive iodine-contaminated water body, comprising: Adding the CPN-Y2-Cl cation framework material of claim 1 or 7 to a radioactive iodine-contaminated water body containing I 3 - , stirring or shaking; Filtering with a microporous filter membrane of 0.22-0.45 μm at regular intervals, and measuring the concentration of the solution I 3 - by an ultraviolet-visible spectrophotometer.
  10. 10. The method of claim 9, wherein the ratio of CPN-Y2-Cl cation framework material to I 3 - solution is controlled to be (10-50) mg to 10 ml.

Description

CPN-Y2-Cl cation framework material and preparation method and application thereof Technical Field The application relates to the technical field of biological medicine, in particular to a CPN-Y2-Cl cation framework material, a preparation method and application thereof. Background Iodine is a key element in the nuclear industry and the medical radiation field, and its radioisotope (such as 129 I and 131 I) has remarkable environmental mobility and bioaccumulation characteristics, and is one of the pollutants which need to be focused in the nuclear wastewater treatment process. Wherein 129 I has extremely long half-life (about 1.57×10 7 years) and strong migration ability, can exist in the environment for a long time, and can enter the ecological system through water diffusion, 131 I has higher biological activity although the half-life is shorter, is easy to enrich in thyroid gland of human body, and can cause metabolic dysfunction, tissue injury and even endanger life. In the use process of nuclear accidents, nuclear waste treatment and medical radioactive sources, radioactive iodide ions are easy to combine with iodine simple substances to form I 3-, and the radioactive iodide ions easily enter a water body circulation system to cause water body pollution. Therefore, the efficient removal and safety monitoring of the radioactive iodine in the water phase are realized, and the method has important significance for nuclear safety guarantee, ecological environment protection and public health. Compared with the traditional inorganic adsorption materials such as silver-based zeolite, active carbon, clay minerals and the like, the organic cation framework material (CPN) has positive charge sites which exist stably in the framework, and can realize more effective adsorption on negatively charged I 3- through electrostatic action, ion exchange and various non-covalent interactions. Meanwhile, the material generally has a designable pore structure and good water phase stability, and shows potential application advantages in water environment. Besides pollutant removal, the method has important practical requirements for realizing rapid and sensitive identification of polyiodide ions in water. The fluorescent recognition technology is suitable for on-site detection and real-time early warning of radioactive pollutants due to the characteristics of high response speed, high sensitivity, simplicity and convenience in operation and the like. By introducing fluorescent unit-tetraphenyl ethylene into the organic cation framework material, the material can generate detectable fluorescence change in the process of adsorbing I 3-, thereby realizing visual identification of I 3-. Disclosure of Invention Object of the invention The application aims to provide a cationic framework material CPN-Y2-Cl with high-efficiency adsorption and fluorescence identification functions, so as to realize rapid, high-efficiency and selective removal of a water phase I 3-. (II) technical scheme The first aspect of the application provides a CPN-Y2-Cl cation framework material, which has the chemical structural formula as follows: 。 the second aspect of the application provides a method for preparing a CPN-Y2-Cl cation framework material, comprising the following steps: quaternizing tetra (1-imidazolyl) ethylene and 5,5 '-bromomethyl-2, 2' -bipyridine to obtain a synthetic product; and (3) replacing the synthesized product with saturated sodium chloride to obtain the CPN-Y2-Cl cation framework material. The CPN-Y2-Cl cation framework material provided by the application is prepared by quaternization reaction of large-size aromatic conjugated monomer tetra (1-imidazole phenyl) ethylene (TIPE) and 5,5 '-bromomethyl-2, 2' -bipyridine ((BrCH 2)2 Bpy) and substitution of saturated sodium chloride, and is an organic cation framework material formed in a covalent bond form, and the CPN-Y2-Cl cation framework material has positive electric characteristics as a whole by introducing quaternization ion sites into a nitrogen-rich porous organic polymer framework, so that effective electrostatic effect can be generated between the CPN-Y2-Cl cation framework material and multi-iodine anions I 3-, meanwhile, cl - in the framework can be subjected to ion exchange with I 3-, so that I 3- can enter and be fixed in the porous framework, and high-efficiency adsorption of I 3- is realized. Preferably, the mass ratio of the tetra (1-imidazolyl) ethylene to the 5,5 '-bromomethyl-2, 2' -bipyridine is 1 (1.1-1.2). Preferably, the temperature of the quaternization reaction is 85-100 0 ℃, and the time of the quaternization reaction is 3-h. Preferably, the synthetic product is light yellow CPN-Y2-Br, and the chemical structural formula is as follows: 。 preferably, the synthetic product is subjected to saturated sodium chloride substitution and soaked in a saturated sodium chloride solution for 12-24 hours. The third aspect of the application provides a CPN-Y2-Cl cation