A Luminescent Microporous Metal-Organic Framework for the Fast and Reversible Detection of High Explosives
A Luminescent Microporous Metal-Organic Framework for the Fast and Reversible Detection of High Explosives
复制标题
用于快速可逆检测烈性炸药的发光微孔金属有机框架
DOI：
10.1002/anie.200804853
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发表时间：
2009-01-01
影响因子：
16.6
通讯作者：
Li, Jing
中科院分区：
文献类型：
--
作者：
Lan, Anjian;Li, Kunhao;Li, Jing
由于对国土安全、环境和人道主义的影响，探测烈性炸药正日益引起人们的注意。[1]2，4-二硝基甲苯（DNT）是2，4，6-三硝基甲苯（TNT）生产过程中不可避免的副产物，其室温蒸气压约为TNT的20倍。因此，硝基芳香族炸药的检测往往是通过检测DNT来实现的。相反，可塑炸药通常不含硝基芳烃，因此通过检测2，3-二甲基-2，3-二硝基丁烷（DMNB，法律要求所有商用可塑炸药中的标记物）来实现对它们的检测。为了寻找更方便和更具成本效益的替代品，以取代训练有素的犬科动物[2]或复杂的分析仪器[3]，最近已经确定了能够快速可靠地检测上述化学物质的新分子，低聚物，聚合物和纳米级材料。[4-9]荧光氧化还原猝灭通常是这些系统中的工作机制。[4，5]虽然已经证明了对硝基芳香族炸药的极高灵敏度，但DMNB的检测仍然是一个巨大的挑战，主要是由于其不利的还原潜力（1991年）。7 V vs. SCE）和与感觉材料的弱结合，这是由于其三维分子结构和缺乏π-π相互作用。[10]微孔金属有机框架（MMOFs）是一类新型的沸石状晶体材料，最近的研究表明其具有广泛的应用潜力，如分子存储和分离，催化和传感。[11]已经发现了少量在固态下发光的MMOF。[12]这种材料内的发光和可接近的孔隙率的组合赋予它们将主体-客体化学转换为可检测的分子的能力。
Detection of high explosives is attracting increasing attention owing to homeland security, environmental and humanitarian implications.[1] 2, 4-Dinitrotoluene (DNT), an inevitable byproduct in the manufacturing process of 2, 4, 6-trinitrotoluene (TNT), has a room-temperature vapor pressure about 20times that of the latter. Therefore, the detection of nitroaromatic explosives is often achieved by detection of DNT. Conversely, plastic explosives often do not contain nitroaromatics, and their detection is consequently realized by detection of 2, 3-dimethyl-2, 3-dinitrobutane (DMNB, a taggant required by law in all commercial plastic explosives). In search of more convenient and cost-effective alternatives to the well-trained canines [2] or sophisticated analytical instruments,[3] new molecular, oligomeric, polymeric, and nanoscale materials that are capable of fast and reliable sensing of the above chemicals have recently been identified.[4–9] Fluorescence redox quenching is often the working mechanism within these systems.[4, 5] Although extremely high sensitivity towards nitroaromatic explosives has been demonstrated, detection of DMNB remains a great challenge, largely owing to its unfavorable reduction potential (À1. 7 V vs. SCE) and weak binding to the sensory materials, which arises from its three-dimensional molecular structure and lack of π–π interactions.[10]Microporous metal–organic frameworks (MMOFs) are a new class of zeolite-like crystalline material, and have been shown by recent research to have great potential for a wide range of applications, such as molecular storage and separation, catalysis, and sensing.[11] A small number of MMOFs have been discovered which are luminescent in the solid state.[12] The combination of luminescence and accessible porosity within such materials imparts them with the capability of transducing the host–guest chemistry to detectable