3,5-dimethylthio-2,4-bis(4,4'-dinitroazophenylaminoazo)toluene, preparation method and applications thereof

A dinitroazophenylaminoazo group and dimethylthio group technology, applied in the field of bistriazene compounds, can solve the problems of unsatisfactory selectivity and low sensitivity of reagents, so as to increase electron mobility and improve sensitivity , the effect of mild reaction conditions

Inactive Publication Date: 2016-12-21
SHANXI DATONG UNIV
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Problems solved by technology

[0004] In order to solve the problems of low sensitivity and unsatisfactory selectivity of reagents for detecting heavy metal ions in the prior art, the present invention provides a 3,5-dimethylthio-2-bis(4,4´-dinitrodi Nitrophenylaminoazo)toluene and its preparation method and application

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  • 3,5-dimethylthio-2,4-bis(4,4'-dinitroazophenylaminoazo)toluene, preparation method and applications thereof
  • 3,5-dimethylthio-2,4-bis(4,4'-dinitroazophenylaminoazo)toluene, preparation method and applications thereof
  • 3,5-dimethylthio-2,4-bis(4,4'-dinitroazophenylaminoazo)toluene, preparation method and applications thereof

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[0037] A kind of 3,5-dimethylthio-2-bis(4,4´-dinitroazophenylaminoazo)toluene, abbreviated as DMSNZAZB, the molecular structure formula is as follows:

[0038] .

[0039] The preparation method of 3,5-dimethylthio-2-two (4,4'-dinitroazophenylaminoazo) toluene comprises the following steps, such as figure 1 Shown:

[0040] (1) Synthesis of 4-nitro-4´-aminoazobenzene

[0041] Add 10.4 g (0.1 mol) NaHSO to the beaker 3 , then add 38 mL of water and 8 mL of 40 % (0.1 mol) formaldehyde by volume fraction, stir in a water bath at 58-63 ℃ for 40 min, add 6.7 g (0.07 mol) of aniline, and react for 1.5 h to obtain light yellow anilinomethyl Sodium sulfonate clarifies the solution, and another 9.8 g (0.07 mol) p-nitroaniline is dissolved in 30 mL HCl (1+1, volume ratio), and 20 mL containing 4.9 g NaNO 2 After adding the aqueous solution, react for 30 min to obtain yellow diazonium salt for subsequent use;

[0042] Under cooling in an ice-water bath, add this diazonium salt to t...

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Abstract

The invention belongs to the technical field of bis triazene compounds. In the prior art, the reagent for heavy metal ion detection has low sensitivity and the selectivity is not ideal. With the present invention, the problems in the prior art can be solved. According to the present invention, with the diazotization reaction and the coupling reaction, 3,5-dimethylthio-2,4-diaminotoluene and p-aminonitro azobenzene are adopted as the raw materials to synthesize the novel bis triazene reagent, wherein the synthesized bis triazene reagent is the luminosity analysis reagent with characteristics of high sensitivity and good selectivity, and is the fluorescent reagent having the strong fluorescence characteristic.

Description

technical field [0001] The invention belongs to the technical field of bistriazene compounds, in particular to 3,5-dimethylthio-2,4-bis(4,4´-dinitroazophenylaminoazo)toluene and its preparation method and apply. Background technique [0002] Triazene reagent refers to the general term of all reagents containing -N=N-NH- structure, and its general formula is Ar-N=N-NH-Ar´. The functional group -N=N-NH- is the ligand of this type of reagent. In the presence of surfactants, it is easy to coordinate with metal ions of Group IB and IIB to form stable colored complexes. Therefore, this type of reagent can be used Spectrophotometric detection of metal ions. [0003] Currently, triazene reagents are mainly used for Cd 2+ 、Ni 2+ , Hg 2+ 、Cu 2+ 、Co 2+ 、Ag + Photometric determination of other metal ions (Teng Sijiang, Jiang Wanquan, Zhu Yurui, etc. Chemical Reagents, 1992, 14 (2): 109 pages). Because of its advantages of simple operation, high sensitivity and low cost, it is f...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C319/20C07C323/48G01N21/31G01N21/64
CPCC07C323/48C07C245/08C07C319/20G01N21/31G01N21/643G01N2021/3185G01N2021/6432
Inventor 刘慧君赵海东赵强樊志会马琦宋金萍卢珍
Owner SHANXI DATONG UNIV
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