High-polymer colorimetric nano thin-film material and preparation method and application thereof in detecting Fe<3+> and pyrophosphate
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A nano-film material and high-molecular-ratio technology, applied in the field of analytical chemistry, to achieve high selectivity and sensitivity, high adsorption capacity, easy to carry and visual observation
Inactive Publication Date: 2015-09-16
ZHENGZHOU UNIV
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[0005] Compared with activated carbon, although activated carbon has a certain adsorption capacity for metal
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Embodiment 1
[0035] Embodiment 1. the preparation of macromolecule colorimetric nano film of the present invention
[0036] High molecular polymer of the present invention adopts following synthetic route:
[0037]
[0038] 1) Synthesis of 8-acrylate quinoline-2-aldehyde
[0039] Mix 4.81g (30mmol) of 8-hydroxy-2-methylquinoline in 40mL of toluene, 3mL of dry triethylamine and acryloyl chloride in an ice bath and react at room temperature for 24 hours, then slowly drop 8mL of acryloyl chloride into the reaction bottle, then remove the ice-water bath, and stir the reaction at room temperature for 12h. Purification by column chromatography (developing solvent: ethyl acetate:petroleum ether=1:4) gave 8-acrylate-2-methylquinoline with a yield of 47.3%.
[0040] Characterized as follows: 1 HNMR: δ H (400MHz, DMSO-d 6 , Me 4 Si): 3.36(s, 3H), 6.20(t, 1H), 6.59(d, 2H), 7.47(d, 1H), 7.55(m, 2H), 7.86(d, 1H), and 8.31(d, 1H); 13 C NMR: δ C (100MHz, DMSO-d 6): 164.71, 159.47, 146.76, 14...
Embodiment 2
[0055] Embodiment 2. macromolecule colorimetric nano film of the present invention is used for detecting Fe 3+ and pyrophosphate applications
[0056] (1) Prepare Fe with a concentration of 0-7000μM 3+ Standard solution; (2) use the white homogeneous polymer poly (MMA-co-RQ) nano film test paper that the present invention makes to put into the Fe of concentration 0-20 μ M respectively 3+ In the standard solution, take it out and dry it, the nano-film is detected and contacted with Fe 3+ Then it turns red, and the phenomenon changes very obviously. The test results of the ultraviolet-visible spectrum of the nano-film with the iron ion concentration change are shown in figure 2 ,Depend on figure 2 It can be seen that the polymer film has a good response to iron ions; the linear relationship is shown in image 3 , image 3 It shows that the ultraviolet-visible absorption spectrum of the polymer nanofilm has a good linear relationship with the concentration of iron ions; (3...
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Abstract
The invention discloses a high-polymer colorimetric nano thin-film material and a preparation method and application thereof in detecting Fe<3+> and pyrophosphate. The high-polymer colorimetric nano thin-film material provided by the invention is poly (MMA-co-RQ). The preparation method of the high-polymer colorimetric nano thin-film material comprises the following steps: 1) synthesizing 8- acrylate quinolone-2-aldehyde; 2) synthesizing a rhodaminehydrazidehalacrinate monomer; 3)synthesizing a poly (MMA-co-RQ) copolymer; 4) preparing a high-polymer poly (MMA-co-RQ) nano thinfilm. The prepared high-polymer nano thinfilm has excellent detection effect on Fe<3+> and pyrophosphate and the problem that detection samples are contaminated by fluorescent material can be avoided by use of thehigh-polymer nano thinfilm; in addition, due to high sensitivity, the high-polymer nano thinfilm can be used for detecting the concentrations ofFe<3+> and pyrophosphate through a colorimetric method. Thehigh-polymer nano thinfilm has the advantages of high selectivity, good anti-interference performance, low cost and high convenience in treatmentand therefore is suitable for practical production application; in addition, the probe response speed is high and detection can be realized within one minute.
Description
technical field [0001] The invention belongs to the technical field of analytical chemistry, and in particular relates to a colorimetric nano-film and its preparation method and application, in particular to a polymer colorimetric nano-film and its preparation method as well as a colorimetric nano-film for Fe 3+ and pyrophosphate detection applications. Background technique [0002] Iron ions are very important ions in nature and organisms. The research on iron ions includes the technology of qualitative and quantitative detection of iron in the environment and clinically. The analysis methods include spectrophotometry, inductively coupled plasma spectroscopy, Voltammetry, atomic absorption spectrometry, etc., but these methods require the use of complex instruments, complex pretreatment processes, and professional analytical technicians. Therefore, the analysis cost is high, the analysis time is long, and they cannot have both detection and separation effects . [0003] I...
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