Sachan Sharad Kumar, Anantharaman Ganapathi
Department of Chemistry, Indian Institute of Technology (IIT) Kanpur, Kanpur-208016, India.
Inorg Chem. 2021 Jul 5;60(13):9238-9242. doi: 10.1021/acs.inorgchem.1c00981. Epub 2021 Jun 11.
A robust and multifunctional cuboctahedral [In(μ-OH)(NO)(Imtb)] MOF (In(Imtb)-MOF) with an atypical pyramidal nitrate ion-containing hitherto unknown SBU core [In(μ-OH)(NO)] is reported. The intra- and interlayer nitrate ions adopt pyramidal and inverted pyramidal shapes, which separates the active indium site [(In(μ-OH))NO-(In(μ-OH))] and linear In(μ-OH) by 0.5 and 0.9 nm, respectively. Additionally, the high density of active metal sites shows remarkable catalytic activity with higher TOF even for sterically hindered substrates in Strecker synthesis and CO cycloaddition. Moreover, the luminescence behavior of In(Imtb)-MOF and the presence of uncoordinated nitrogen atoms are exploited for selective sensing of explosive trinitrophenol (TNP) with a detection limit (LOD) of 2.3 ppb.
报道了一种具有非典型含金字塔形硝酸根离子的迄今未知的SBU核[In(μ-OH)(NO)]的坚固且多功能的立方八面体[In(μ-OH)(NO)(Imtb)]金属有机框架（In(Imtb)-MOF）。层内和层间硝酸根离子分别呈金字塔形和倒金字塔形，它们将活性铟位点[(In(μ-OH))NO-(In(μ-OH))]和线性In(μ-OH)隔开，距离分别为0.5纳米和0.9纳米。此外，高密度的活性金属位点表现出显著的催化活性，即使对于空间位阻较大的底物，在斯特雷克合成和CO环加成反应中也具有较高的TOF。此外，利用In(Imtb)-MOF的发光行为和未配位氮原子的存在，对爆炸物三硝基苯酚（TNP）进行选择性传感，检测限（LOD）为2.3 ppb。
