Multilayer interparticle linking hybrid MOF-199 for noninvasive enrichment and analysis of plant hormone ethylene.
Multilayer interparticle linking hybrid MOF-199 for noninvasive enrichment and analysis of plant hormone ethylene.
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DOI：
10.1021/ac404240n
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发表时间：
2014-03
影响因子：
7.4
通讯作者：
Zhuomin Zhang;Yichun Huang;Weiwei Ding;Gongke Li
中科院分区：
文献类型：
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作者：
Zhuomin Zhang;Yichun Huang;Weiwei Ding;Gongke Li
乙烯是一种重要的植物激素，在植物的许多发育过程中起着至关重要的作用。然而，痕量乙烯的有效富集和分析仍然是一个挑战。提出了一种简单而温和的多层颗粒间连接策略来制备新型杂化MOF-199富集涂层。在整个涂层中强的化学颗粒间连接显著地改善了混合M0 F-199涂层的耐久性和再现性。该涂层对乙烯的萃取优于常用的商业涂层，这归因于多种相互作用，包括“分子筛效应”、氢键、开放金属位点相互作用和π-π亲和力。多壁碳纳米管（MWCNTs）与MOF-199的杂化进一步提高了其富集能力，同时也起到了疏水“屏障”的作用，阻止了水分子占据MOF-199的金属空位，有效地提高了MOF-199/CNTs涂层的防潮性能。最后，这种新的富集方法被成功地应用于非侵入分析的痕量乙烯，甲醇，乙醇从水果样品相对较高的湿度。乙烯的检测下限为0.016 μg/L。结果表明，该方法可用于水果样品中痕量乙烯的检测。葡萄、黄皮、蓝莓和榴莲壳的加标回收率分别为90.0- 114%、79.4- 88.6%、78.5- 86.8%和85.2-105%，相对标准偏差分别为4.8- 9.8%、6.9- 8.9%、3.8- 8.1%和9.3-10.5%（n = 3）。分别
Ethylene, an important plant hormone, is of utmost importance during many developmental processes of plants. However, the efficient enrichment and analysis of trace ethylene still remains a challenge. A simple and mild multilayer interparticle linking strategy was proposed to fabricate a novel hybrid MOF-199 enrichment coating. Strong chemical interparticle linkages throughout the coating improved the durability and reproducibility of hybrid MOF-199 coating dramatically. This coating performed a significant extraction superiority of ethylene over commonly used commercial coatings, attributed to the multiple interactions including "molecular sieving effect", hydrogen bonding, open metal site interaction, and π-π affinity. The hybridization of multiwalled carbon nanotubes (MWCNTs) with MOF-199 further improved the enrichment capability and also acted as a hydrophobic "shield" to prevent the open metal sites of MOF-199 from being occupied by water molecules, which effectively improved the moisture-resistant property of MOF-199/CNTs coating. Finally, this novel enrichment method was successfully applied for the noninvasive analysis of trace ethylene, methanol, and ethanol from fruit samples with relatively high humidity. The low detection limit was 0.016 μg/L for ethylene. It was satisfactory that trace ethylene could be actually detected from fruit samples by this noninvasive method. Good recoveries of spiked grape, wampee, blueberry, and durian husk samples were obtained in the range of 90.0-114%, 79.4-88.6%, 78.5-86.8%, and 85.2-105% with the corresponding relative standard deviations of 4.8-9.8%, 6.9-8.9%, 3.8-8.1%, and 9.3-10.5% (n = 3), respectively.