title: Encapsulation of the ethylene inhibitor 1-Methylcyclopropene by cucurbit[6]uril.
abstract: 1-Methylcyclopropene (1-MCP) is an excellent safe and commercially available ethylene antagonist for the preservation of horticultural products. However 1-MCP has to be stored in absorbents due to its gaseous and unstable characteristics. In this paper cucurbit[6]uril (CB[6]) was used as the absorbent to encapsulate 1-MCP, and the resultant inclusion complex was characterized by IR, powder X-ray diffraction, thermal analysis, and fluorescent spectra. The effects of encapsulation conditions on the formation of inclusion complex were also investigated. The amount of 1-MCP encapsulated by CB[6] was about 4.5% by weight when the initial concentration of 1-MCP, encapsulation temperature, CB[6] concentration, and encapsulation time were set at 75 mL/L, 20 °C, 30 mM, and 8 h, respectively. Furthermore, the release of 1-MCP from the complex can be realized with different solutions such as sodium bicarbonate, benzoic acid, and distilled water. CB[6] can be used as an excellent absorbent for encapsulation of 1-MCP.
authors: Department of Chemistry,  Huazhong Agricultural University , Wuhan 430070, China.
authors: Quan
authors: Q
authors: Zhang
authors: Zeng
authors: Z
authors: Zhen
authors: Hong
authors: H
authors: Jiang
authors: Xue-Gang
authors: XG
authors: Li
authors: Jun-An
authors: JA
authors: Liu
mesh_terms: D001952:Bridged-Ring Compounds; D002214:Capsules; D003521:Cyclopropanes / Q000737:chemistry*; D005030:Ethylenes / Q000037:antagonists & inhibitors*; D005519:Food Preservation / Q000379:methods; D007093:Imidazoles; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils
chemical_list: D001952:Bridged-Ring Compounds; D002214:Capsules; D003521:Cyclopropanes; D005030:Ethylenes; D007093:Imidazoles; C454805:cucurbit(6)uril; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils; C036216:ethylene; C412563:1-methylcyclopropene