Lower alcohol detecting probe, preparation method and application thereof
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A technology for detecting probes, lower alcohols
Inactive Publication Date: 2013-09-25
ZHENGZHOU UNIV
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[0003] At present, the detection of lower alcohols is mainly based on liquid chromatography technology, but these analytical methods use expensive instruments, require high technology for operation and analysis, and take a long time for detection
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Embodiment 1
[0024] Embodiment 1: R1 and R3 are hydrogen atoms, R2 are nitrogen atoms in the general formula, (probe 1 )
[0025] Synthesis steps: Add o-hydroxyaniline (0.011 mol) ethanol solution dropwise to 1,8-naphthyridine-2-carbaldehyde (0.01 mol) ethanol solution under nitrogen protection, stir at room temperature for 30 minutes and then reflux for 2 hours to remove Solvent, ethanol recrystallization, the final product (2.07 g, 65%) can be obtained.
[0026] The characterization is as follows: Characterization of 1 : Mp = 199?201 °C. HRMS (EI) m / z: calcd for C 15 h 11 N 3 ONa [M + Na] + , 272.0794; found, 272.0799. 1 H NMR (400 MHz, DMSO- d 6 , TMS): δ H 9.42 (s, 1H), 9.17 (d, 1H), 8.98 (s, 1H), 8.68 (m, 1H), 8.60 (m, 1H), 8.53 (m, 1H), 7.71 (m, 1H), 7.46 (m, 1H), 7.20 (m, 1H). 6.99 (m, 1H), and 6.92 (m, 1H). 13 C NMR (100 MHz, DMSO-d 6 ): δ C 159.24, 158.12, 155.85, 154.67, 152.47, 138.77, 137.98, 136.62, 129.57, 123.94, 123.61, 120.37, 120.14, and 117.04.
Embodiment 2
[0027] Embodiment two: R1 and R3 are hydrogen atoms in the general formula, and R2 is group, (probe 2）
[0028] The synthesis steps were the same as in Example 1, except that 8-ethyl acetate methoxyquinoline-2-carbaldehyde was used instead of 1,8-naphthyridine-2-carbaldehyde in Example 1, and the yield was 67%.
[0029] The characterization is as follows: Characterization of 2 : Mp = 159?160 °C. HRMS (EI) m / z: calcd for C 20 h 18 N 2 o 4 [M + Na] + , 373.1159; found, 373.1169. 1 H NMR (400 MHz, CDCl 3 , TMS): δ H 9.14(s, 1H), 8.38 (m, 1H), 8.25 (m, 1H), 7.50 (m, 1H), 7.42 (s, 1H), 7.26 (m, 2H), 7.04 (m, 2H), 6.96 (m, 2H), 5.02 (s, 2H), 4.31 (q, 2H). and 1.30 (t, 3H). 13 C NMR (100 MHz, CDCl 3 ): δ C 168.63, 157.50, 153.89, 153.61, 152.91, 139.96, 136.70, 134.36, 130.27, 127.93, 120.40, 118.96, 115.39, 110.25, 61.57, and 14.22.
[0030] Probe molecules 1 and 2 (1.5 × 10 -5 M) add in corresponding solvent, measure ultraviolet-visible spectrum change, as figu...
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Abstract
The invention discloses a lower alcohol detecting probe, and a preparation method and application of the detecting probe, and belongs to the technical field of analytical chemistry detection. The lower alcohol detecting probe has a general formula shown in the description, in which R1 represents a hydrogen atom, R2 represents a nitrogen atom or a group shown in the description and R3 represents a hydrogen atom or a methoxy group. Probe molecules of the lower alcohol detecting probe are made into a detecting plate, the detecting plate turns red or pink after being reacted with lower alcohol, and the phenomenon is obvious and can be recognized by naked eyes; the lower alcohol detecting probe is convenient for use and low in cost, can be directly used for detecting lower alcohol in a solution, can detect lower alcohol rapidly and in real time, is suitable for being used in large scale actual production, and has a good application prospect in the environmental protection field; and the lower alcohol detecting probe avoids the problem that professionals need to use professional tools and software for a long time to obtain results by means of large-scale equipment.
Description
Technical field [0001] The invention involves a low -grade alcohol detection probe, which specifically involves a base -state metastatic compound, its synthesis, and its application, which is an analytical chemical testing technology field. Background technique [0002] Low -grade alcohol (including methanol, ethanol, propylene, etc.) is basic chemical raw materials and high -quality fuel. It is widely used in chemical and chemical industries. Therefore, it is very meaningful to develop simple and efficiently detect alcohol. [0003] At present, the detection of low -grade alcohol is mainly based on liquid chromatography technology. These analysis methods use instruments are expensive, operating analysis requires high technology and long detection time.Therefore, it is necessary to develop a simple, convenient, and fast detection of liquid low -level alcohol sensors. Invention content [0004] The purpose of the present invention is to provide a probe that detects low -grade alc...
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