Sutradhar Manas, Roy Barman Tannistha, Alegria Elisabete C B A, Guedes da Silva M Fátima C, Liu Cai-Ming, Kou Hui-Zhong, Pombeiro Armando J L
Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
National Laboratory for Molecular Sciences, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
Dalton Trans. 2019 Sep 14;48(34):12839-12849. doi: 10.1039/c9dt02196e. Epub 2019 Jul 23.
The new aroylhydrazone N'-(di(pyridin-2-yl)methylene)pyrazine-2-carbohydrazide (HL) species, rich in N-donor sites, has been used to synthesize Cu(ii) compounds with different nuclearities, viz. the binuclear [Cu(μ-1κN,2κNO-L)(Cl)(MeOH)] (1), the octanuclear [Cu(μ-1κN,2κNO-L)(μ-Cl)(Cl)] (2) and the 1D coordination polymer [Cu(μ-1κN,2κNO,3κN-L)(μ-NO)(NO)(HO)]·nNO (3). They have been characterized by elemental analysis, FT-IR and single crystal X-ray diffraction. The magnetic properties of 2 and 3 have been explored using variable temperature magnetic measurements. The catalytic performances of the compounds were evaluated towards the peroxidative oxidation of o-, p- and m-xylenes under microwave irradiation, leading to the formation of the corresponding methyl benzyl alcohol, tolualdehyde and toluic acid as the major products. Complex 3 exhibits the best catalytic activity towards the oxidation of p-xylene with a total yield of 37% (4-methylbenzyl alcohol + p-tolualdehyde + p-toluic acid).
新型芳酰腙N'-(二(吡啶-2-基)亚甲基)吡嗪-2-碳酰肼(HL)物种富含氮供体位点，已被用于合成具有不同核数的铜(ii)化合物，即双核[Cu(μ-1κN,2κNO-L)(Cl)(MeOH)] (1)、八核[Cu(μ-1κN,2κNO-L)(μ-Cl)(Cl)] (2)和一维配位聚合物[Cu(μ-1κN,2κNO,3κN-L)(μ-NO)(NO)(HO)]·nNO (3)。它们通过元素分析、傅里叶变换红外光谱和单晶X射线衍射进行了表征。利用变温磁性测量研究了2和3的磁性。评估了这些化合物在微波辐射下对邻二甲苯、对二甲苯和间二甲苯过氧化氧化的催化性能，主要产物为相应的甲基苄醇、甲苯醛和甲苯酸。配合物3对对二甲苯氧化表现出最佳催化活性，总产率为37%(4-甲基苄醇 + 对甲苯醛 + 对甲苯酸)。
