A kind of supramolecular polymer and its preparation and application method
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A technology of supramolecular polymer and application method, which is applied in the field of nmL supramolecular polymer and its preparation and application, to achieve the effect of maintaining catalytic performance, stable performance and obvious color development
Active Publication Date: 2020-09-11
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
In order to quickly and easily detect the quality of oil samples, the reaction is very sensitive, and the color rendering effect is obvious. At present, there are no related reports at home and abroad.
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Embodiment 1
[0020] Example 1: Dissolve TMB in absolute ethanol so that the final concentration is 3 mg / mL, then add ferrous sulfate heptahydrate 20 times the mass of TMB, ultrasonically vibrate for 10 minutes, and centrifuge at 12,000 rpm to remove the precipitate, to obtain The supernatant is (3,3',5,5'-tetramethylbenzidine) n (Fe 2+ ) m (X) L supramolecular polymer solution. Evaporate or dry the solution to obtain (3,3',5,5'-tetramethylbenzidine) n (Fe 2+ ) m (X) L Supramolecular polymer solids.
Embodiment 2
[0021] Embodiment 2 TMB is dissolved in the ethanol solution that water content is 10%, and its final concentration is 3mg / mL, then adds ferrous sulfate heptahydrate of different quality, makes the molar ratio of ferrous iron and TMB molecule in the system respectively 3:1, or 2:1, or 1:1, or 1:2. After ultrasonic vibration for 10 minutes, centrifuge at 12,000 rpm to remove the precipitate, and the obtained supernatant is 3,3’,5,5’-tetramethylbenzidine) n (Fe 2+ ) m (X) L supramolecular polymer solution. Evaporate or dry the solution to obtain (3,3',5,5'-tetramethylbenzidine) n (Fe 2+ ) m (X) L Supramolecular polymer solids.
Embodiment 3
[0022] Example 3 TMB was dissolved in absolute ethanol to make its final concentration 3 mg / mL, then ferrous chloride tetrahydrate (or ferrous nitrate hexahydrate) 20 times the mass of TMB was added, and after ultrasonic vibration for 10 minutes, 12000 Centrifuge at rpm to remove the precipitate, and the obtained supernatant is (3,3',5,5'-tetramethylbenzidine) n (Fe 2+ ) m (X) Lsupramolecular polymer solution. Evaporate or dry the solution to obtain (3,3',5,5'-tetramethylbenzidine) n (Fe 2+ ) m (X) L Supramolecular polymer solids.
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Abstract
The invention discloses a supramolecular polymer as well as a preparation and application method thereof. The supramolecular polymer is characterized by being formed by complexation of 3,3',5,5'-tetramethyl benzidine and Fe<2+> with a Fe-N coordination bond and taking the 3,3',5,5'-tetramethyl benzidine, the Fe<2+> and an anion associated with the Fe<2+> as a repeating unit. The preparation methodcomprises the following steps: the 3,3',5,5'-tetramethyl benzidine and a ferrous salt solid or solution are subjected to ultrasonic vibration in ethanol with a water content of not more than 10% to form the supramolecular polymer. The supramolecular polymer utilizes the Fe<2+> to catalyze peroxide groups to form oxygen molecules, and the oxygen molecules rapidly oxidize the 3,3',5,5'-tetramethylbenzidine, so that a blue-green color is shown. The invention also discloses a method for detecting the peroxide content in grease by utilizing the supramolecular polymer, peroxide values of various edible oil on the market are measured, the reaction is sensitive, and the color rendering gradient is obvious.
Description
technical field [0001] The invention belongs to the field of analysis and detection, and relates to a kind of (3,3',5,5'-tetramethylbenzidine) n (Fe 2+ ) m (X) L Supramolecular polymers and methods for their preparation and use. [0002] technical background [0003] 3,3',5,5'-Tetramethylbenzidine (TMB) is a safe benzidine chromogen reagent, which is widely used in clinical samples and criminal investigation samples such as blood sugar, urine sugar, hemoglobin, peroxide Rapid determination of enzymes and antigenic substances, etc. TMB molecules have good redox properties, not only can be oxidized in solution to develop color, but also reversible redox reactions can occur on the surface of electrochemical electrodes. [0004] Supramolecules usually refer to two or more molecules combined by intermolecular interactions to form complex and organized aggregates, and maintain a certain integrity so that they have definite microstructure and macroscopic properties. Supramolec...
Claims
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Application Information
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