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Preparation method and application of inclusion complexes of 1-methylcyclopropene and derivatives thereof

A technology of methylcyclopropene and inclusions, which is applied in the field of preparation of plant preservatives, can solve the problems of high cost of inclusion agent α-cyclodextrin, greater influence of external temperature and humidity, and lower inclusion rate. Achieve low cost, improve fresh-keeping quality, and good stability

Inactive Publication Date: 2011-12-14
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when 1-MCP is loaded, the reduction of 1-MCP pressure (the pressure value of 1-MCP gas in the device) will lead to the reduction of inclusion rate (the quality of 1-MCP gas contained in the unit mass of solids) ; The combination of 1-methylcyclopropene and the carrier is too weak; it is greatly affected by the external temperature and humidity, and the cost of the inclusion agent α-cyclodextrin is high.

Method used

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  • Preparation method and application of inclusion complexes of 1-methylcyclopropene and derivatives thereof
  • Preparation method and application of inclusion complexes of 1-methylcyclopropene and derivatives thereof
  • Preparation method and application of inclusion complexes of 1-methylcyclopropene and derivatives thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034]A 250 mL three-neck flask was added with a saturated aqueous solution containing 1.5 mmol of cucurbit [6] urea (CB [6]), and the entire reaction system was evacuated before the reaction started. Under airtight conditions, 1-MCP and nitrogen (the molar ratio of 1-MCP and cucurbit [6] urea is 2: 1; nitrogen is used as protective gas, so that the final pressure in the three-necked flask is 1 atmospheric pressure) is passed into the three-necked flask. In the flask, stir and react at 15°C for 6h; then filter, and dry the obtained solid in a vacuum desiccator at 35°C for 24h to obtain the CB[6] / 1-MCP inclusion complex. The thermogravimetric test shows that the content of 1-MCP in the inclusion complex prepared by this method is about 5% of the weight of the inclusion complex. The product can be sealed in a desiccator for long-term storage.

Embodiment 2

[0036] The cucurbituril used was CB[5], the inclusion reaction time was 2h, and other conditions were the same as in Example 1. The thermogravimetric test shows that the content of 1-MCP in the inclusion complex prepared by this method is about 2.4% of the weight of the inclusion complex.

Embodiment 3

[0038] The cucurbituril used was CB[7], the inclusion reaction time was 5h, and other conditions were the same as in Example 1. The thermogravimetric test shows that the content of 1-MCP in the inclusion complex prepared by this method is about 4% of the weight of the inclusion complex.

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Abstract

The invention relates to the technical field of preparation of plant fresh-keeping agents, and provides a preparation method and application of inclusions of 1-methylcyclopropene and derivatives thereof. The inclusion agent for preparing the inclusion compound of the present invention is a cucurbituril mixture or any single component thereof. The 1-methylcyclopropene and its derivatives can exist stably after forming an inclusion complex with cucurbituril, thereby providing a convenient method for storing and transporting these compounds that can inhibit ethylene reaction of plants. At the same time, the preparation process of the inclusion complex is simple, the cost is low, and it is convenient to use. When in use, only need to put the inclusion complex directly into water or an aqueous solution containing acid or alkali to re-release 1-methylcyclopropene and its derivatives. thing.

Description

technical field [0001] The invention relates to the technical field of preparation of plant fresh-keeping agents, in particular to a preparation method and application of inclusions of 1-methylcyclopropene and derivatives thereof. Background technique [0002] Ethylene is an important plant growth regulator, which can induce a series of irreversible physiological and biochemical reactions related to plant tissue senescence and fruit ripening. It is called "ripening hormone". By inhibiting the biosynthesis of ethylene, it can effectively inhibit the aging process of fruits and vegetables after ripening. In 1996, Sisler et al. found that cyclopropene compounds could inhibit the function of ethylene (Sisler E et al.Plant Growth Regulation, 1996, 18), such as cyclopropene (cyclopropene, CP), 1-methylcyclopropene (1-methylcyclopropene , 1-MCP), 3,3-dimethylcyclopropene (3,3-dimethyl-cyclopropene, 3,3-DMCP), etc., among which 1-MCP has the best effect, its biological activity is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/152A01N3/02
Inventor 江洪张全郭鹏飞魏晓磊王欢
Owner HUAZHONG AGRI UNIV
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