Iridium complex containing (aldehyde) phenanthroline ligand and method for quantitatively detecting bisulfite by using iridium complex containing (aldehyde) phenanthroline ligand

A technology of bisulfite and iridium complexes, applied in the field of fluorescent materials, to achieve good selectivity, high sensitivity, and good stability

Inactive Publication Date: 2017-09-08
SHAANXI NORMAL UNIV
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Problems solved by technology

However, the research on iridium metal complexes for targeted detection of bisulfite has not been reported yet.

Method used

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  • Iridium complex containing (aldehyde) phenanthroline ligand and method for quantitatively detecting bisulfite by using iridium complex containing (aldehyde) phenanthroline ligand
  • Iridium complex containing (aldehyde) phenanthroline ligand and method for quantitatively detecting bisulfite by using iridium complex containing (aldehyde) phenanthroline ligand
  • Iridium complex containing (aldehyde) phenanthroline ligand and method for quantitatively detecting bisulfite by using iridium complex containing (aldehyde) phenanthroline ligand

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preparation example Construction

[0041] (1) Preparation of chlorine-bridged dimers

[0042] Under nitrogen protection, 0.3528g (1mmol) of IrCl 3 ·3H 2 O was added to the mixed solvent of 2-ethoxyethanol and water, 2-ethoxyethanol: water (V:V) = 30:10mL, magnetically stirred for 15min, after stirring evenly, 321μL (2.2mmol) of 2-Phenylpyridine, heated to 120°C, refluxed, stirred for 24 hours, then stopped the reaction, cooled to room temperature, and filtered with suction to obtain a precipitate, which was washed with 30mL secondary deionized water, 30mL ethanol and 30mL n-hexane, respectively, at 50°C Vacuum baked in a drying oven for 12 hours to dryness to obtain orange-red powdery chlorine-bridged dimer;

[0043] (2) Synthesis of iridium complexes

[0044] Under the protection of nitrogen, 0.11g (0.1mmol) of chlorine bridge dimer and 0.048g (0.228mmol) of 5-formyl-1,10phenanthroline were mixed according to the molar ratio of 1:2.28 and added to 50mL of dichloromethane In the solvent, heat to 40°C, stir ...

Embodiment 1

[0048] In this embodiment, the above-mentioned iridium complex (abbreviation: iridium complex) containing (aldehyde group) phenanthroline ligand is used as a fluorescent probe to detect the bisulfite content in the sample to be tested, and the specific detection method is realized by the following steps :

[0049] (1) Preparation pH is 5.0, concentration is the acetic acid-sodium acetate buffer solution of 10mmol / L, then prepare the dimethyl sulfoxide solution of the iridium complex with concentration of 1mmol / L and the standard hydrogen sulfite radical of 1mmol / L aqueous solution;

[0050] (2) In a 10mL centrifuge tube, add 5mL acetic acid-sodium acetate buffer solution with a pH of 5.0 and a concentration of 10mmol / L and 300μL of a dimethyl sulfoxide solution of a 1mmol / L iridium complex in sequence, and then add 0, 4, 10, 20, 30, 40, 50, 60, 70, 80, 90μL standard bisulfite aqueous solution with a concentration of 1mmol / L, and then add a certain volume of acetic acid-sodium...

Embodiment 2

[0057] The present embodiment uses the above-mentioned iridium complex containing (aldehyde group) phenanthroline ligand as a fluorescent probe to detect the bisulfite content in the sample to be tested, and the specific detection method is realized by the following steps:

[0058] (1) The disodium hydrogen phosphate-citric acid buffer solution with a pH of 3.0 and a concentration of 10mmol / L is prepared, and then the dimethyl sulfoxide solution of the iridium complex with a concentration of 1mmol / L and the standard sulfoxide solution with a concentration of 1mmol / L are prepared. Hydrogen sulfate aqueous solution;

[0059] (2) In a 10mL centrifuge tube, add 5mL of dimethyl sulfoxide solution with a pH of 3.0 and a concentration of 10mmol / L disodium hydrogen phosphate-citrate buffer and 300μL of a 1mmol / L iridium complex in sequence, and then add Add 0, 4, 10, 20, 30, 40, 50, 60, 70, 80, 90 μL of standard bisulfite aqueous solution with a concentration of 1 mmol / L, and then add...

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Abstract

The invention relates to an iridium complex containing an (aldehyde) phenanthroline ligand and a method for quantitatively detecting bisulfite by using the iridium complex containing the (aldehyde) phenanthroline ligand. The molecular formula of the iridium complex containing the (aldehyde) phenanthroline ligand is [Ir(ppy)2phen-CHO]<+>PF6<->, and the mole mass of the iridium complex is 854.1227g / mol. According to the iridium complex containing the (aldehyde) phenanthroline ligand, the aldehyde on the iridium complex and sodium bisulfite conduct addition reaction to generate sodium hydroxysulfonate, so the iridium complex has a characteristic that the fluorescence gradually increases at the emission wavelength of 593nm, the content of bisulfite is detected by a standard curve method, and the detection method has simplicity, reliable detection results, high sensitivity, good stability and good selectivity, can conduct non-intrusive type real-time monitoring and is pollution-free to the detected samples.

Description

technical field [0001] The invention belongs to the technical field of fluorescent materials, and in particular relates to an iridium complex containing (aldehyde group) phenanthroline ligands and a method for quantitatively detecting bisulfite with the iridium complex containing (aldehyde group) phenanthroline ligands method. Background technique [0002] Iridium metal complexes have aroused great research interests of many scholars because of their good fluorescence quantum yield and luminous efficiency and good optical stability. Compared with ruthenium bipyridine complexes, iridium metal complexes have the advantages of high luminous efficiency, long lifetime, and high sensitivity, and have been favored by analytical chemists in recent years. Previous studies mainly focused on the use of synthesized iridium metal complexes for the determination of other substances. For example, Huang Chunhui's research group reported using iridium metal complexes to detect homocysteine;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06G01N21/64
CPCC07F15/0033C09K11/06C09K2211/185G01N21/643
Inventor 漆红兰高红方韩卫娟汪莉芬彭亦锦
Owner SHAANXI NORMAL UNIV
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