Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India.
Department of Chemistry, DAV University Jalandhar, Punjab, 144012, India.
Chem Asian J. 2022 Jan 17;17(2):e202101204. doi: 10.1002/asia.202101204. Epub 2021 Dec 2.
We report the synthesis and structural characterization of two coordination polymers (CPs), namely; [{Zn(L)(DMF) } ⋅ 2BF ] (1) and [{Cd(L) (Cl) } ⋅ 2H O] (2) (where L=N ,N -di(pyridin-4-yl)naphthalene-2,6-dicarboxamide). Crystal packing of 1 reveals the existence of channels running along the b- and c-axis filled by the ligated DMF and lattice anions, respectively. Whereas, crystal packing of 2 reveals that the metallacycles of each 1D chain are intercalating into the groove of adjacent metallacycles resulting in the stacking of 1D loop-chains to form a sheet-like architecture. In addition, both 1 and 2 were exploited as multifunctional materials for the detection of nitroaromatic compounds (NACs) as well as a catalyst in the ipso-hydroxylation of aryl/heteroarylboronic acids. Remarkably, 1 and 2 showed high fluorescence stability in an aqueous medium and displayed a maximum 88% and 97% quenching efficiency for 4-NPH, respectively among all the investigated NACs. The mechanistic investigation of NACs recognition suggested that the fluorescence quenching occurred via electron as well as energy transfer process. Furthermore, the ipso-hydroxylation of aryl/heteroarylboronic acids in presence of 1 and 2 gave up to 99% desired product yield within 15 min in our established protocol. In both cases, 1 and 2 are recyclable upto five cycles without any significant loss in their efficiency.
我们报告了两种配位聚合物（CPs）的合成和结构表征，即 [{Zn(L)(DMF)} ⋅ 2BF ]（1）和 [{Cd(L)(Cl)} ⋅ 2H O]（2）（其中 L=N,N -二（吡啶-4-基）萘-2,6-二羧酸酰胺）。1 的晶体堆积显示存在沿 b-和 c-轴延伸的通道，分别填充有配位的 DMF 和晶格阴离子。然而，2 的晶体堆积显示，每个 1D 链的金属环相互嵌入相邻金属环的凹槽中，导致 1D 环链堆积形成片状结构。此外，1 和 2 都被用作检测硝基芳烃化合物（NACs）的多功能材料，以及芳基/杂芳基硼酸的 ipso-羟基化反应的催化剂。值得注意的是，1 和 2 在水介质中表现出高荧光稳定性，并且在所有研究的 NACs 中，对 4-NPH 的最大荧光猝灭效率分别为 88%和 97%。NACs 识别的机理研究表明，荧光猝灭是通过电子和能量转移过程发生的。此外，在 1 和 2 的存在下，芳基/杂芳基硼酸的 ipso-羟基化反应在我们建立的方案中在 15 分钟内得到高达 99%的所需产物收率。在这两种情况下，1 和 2 在五轮循环内可重复使用，而其效率没有明显损失。
