Fluorescence sensor for rapid detection of explosives and preparation method thereof, and method for rapid detection of explosives
A fluorescent sensor, explosives technology, applied in the field of explosives detection
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[0070] The preparation method of above-mentioned polymer, comprises the following steps:
[0071] 1) In zinc powder, TiCl 4 Under the condition of existence, dissolve 4,4'-dibromobenzophenone and compound 1 in a solvent for reflux reaction, separate and purify to obtain compound 2; the structural formulas of compound 1 and compound 2 are as follows:
[0072]
[0073] Compound 1;
[0074]
[0075] Compound 2;
[0076] 2) In the presence of an alkaline substance and a palladium catalyst, compound 2 and pinacol borate were added to a solvent for reaction, and separation and purification were performed to obtain compound 3; the structural formula of compound 3 was as follows:
[0077]
[0078] 3) In the presence of an alkaline substance and a palladium catalyst, add 3,6-dibromocarbazole and compound 3 into a solvent for reaction, separate and purify to obtain a polymer represented by formula I.
[0079] One of the polymers with aggregation-induced luminescent effect ha...
Embodiment 1
[0103] The fluorescent sensor used for rapid detection of explosives in this embodiment is made of a graphene composite material dissolved in a solvent with a concentration of 1 × 10 -5 mol / L solution; the graphene composite material includes graphene and polymer P1, and polymer P1 modifies graphene in a non-covalent bond form. The solvent is a mixed solvent formed by mixing water and tetrahydrofuran; the volume percentage of tetrahydrofuran in the mixed solvent is 10%.
[0104] The preparation method of the fluorescent sensor for rapid detection of explosives of the present embodiment comprises the following steps:
[0105] 1) Preparation of graphene composite material:
[0106] a) Take 10 mg of graphene oxide (GO), add it into THF (10 mL), and ultrasonically disperse it for 20 min to obtain a graphene oxide dispersion;
[0107] Take polymer P1 (100mg), and dissolve it in THF (20mL) to obtain a polymer solution;
[0108] b) The graphene oxide dispersion obtained in step a)...
Embodiment 2
[0112] The fluorescent sensor used for rapid detection of explosives in this embodiment is made of a graphene composite material dissolved in a solvent with a concentration of 1 × 10 -6mol / L solution; the graphene composite material includes graphene and polymer P2, and polymer P2 modifies graphene in a non-covalent bond form. The solvent is a mixed solvent formed by mixing water and tetrahydrofuran; the volume percentage of tetrahydrofuran in the mixed solvent is 5%.
[0113] The preparation method of the fluorescent sensor for rapid detection of explosives of the present embodiment comprises the following steps:
[0114] 1) Preparation of graphene composite material:
[0115] a) Take 5mg graphene oxide (GO), add it in THF (50mL), and ultrasonically disperse it for 40min to obtain a graphene oxide dispersion;
[0116] Take polymer P2 (25mg), and dissolve it in THF (5mL) to obtain a polymer solution;
[0117] b) The graphene oxide dispersion obtained in step a) is added dro...
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