Fluorescent chromic material, preparation method and use thereof

Patent metadata

Field	Value
Publication number	US-11873449-B2
Application number	US-202016981239-A
Country	US
Kind code	B2
Filing date	Jan 8, 2020
Priority date	Sep 9, 2019
Publication date	Jan 16, 2024
Grant date	Jan 16, 2024

Abstract

The present invention discloses a fluorescent chromic material having a chemical formula of [PPy3Cu2I2]n, wherein PPy3 is tripyridylphosphine. The present invention also provides a method for preparing the fluorescent chromic material, and the use of the fluorescent chromic material in the detection of dichloromethane vapor. The fluorescent chromic material of the present invention has simple synthesis steps, high yield, and capability of large production; and can be used as a fluorescent probe for detecting dichloromethane vapor. It has the advantages of simple operation, high selectivity, high sensitivity, good cycle performance and good stability.

First claim

What is claimed is:

1. A fluorescent chromic material, having a chemical formula of [PPy 3 Cu 2 I 2 ] n , wherein PPy 3 is tripyridylphosphine, and wherein the fluorescent chromic material is a crystal having the following unit cell parameters: a=b=30.672 Å, c=11.631 Å, α=β=90°, γ=120°, and space group R-3.

2. A method for preparing the fluorescent chromic material according to claim 1 , comprising steps of:
adding cuprous iodide and tripyridylphosphine to a mixed solution of acetonitrile and water, and reacting by heating; and filtering the resulting solution after the reaction is completed, to obtain crystals that are the fluorescent chromic material.

3. The method for preparing a fluorescent chromic material according to claim 2 , wherein the molar ratio of cuprous iodide to tripyridinyl phosphine is 2:1-3:1, and the volume ratio of acetonitrile to water is 1:1-2:1.

4. The method for preparing a fluorescent chromic material according to claim 2 , wherein the heating temperature is 80-130° C., and the heating time is 24-48 h.

5. The method for preparing a fluorescent chromic material according to claim 2 , wherein after filtration the crystals are washed with ether, and dried.

6. A method for the detection of dichloromethane vapor:
providing the fluorescent chromic material according to claim 1 ; and
detecting the dichloromethane vapor by using the fluorescent chromic material.

Assignees

• Univ Soochow

Inventors

• Lang Jianping
• Liu Chunyu
• Chen Liang
• Ni Chunyan

Classifications

• C09K9/02 Primary

  Organic tenebrescent materials · CPC title

• C07F9/505

  Preparation; Separation; Purification; Stabilisation · CPC title

• C07F9/5022

  Aromatic phosphines (P-C aromatic linkage) · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C09K2211/1022

  bridged by heteroatoms, e.g. N, P, Si or B · CPC title