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| 1 | Study on Property of Salicylaldehyde Schiff Base Metal Complexes for Catalytic Oxidation of Model Sulfides显示文摘Seven kinds of Schiff base metal complexes(C1-C7)were synthesized by the reaction of substituted salicylaldehyde Schiff base with cobalt nitrate,nickel nitrate,and copper nitrate,respectively.The oxygen carrying performance,and the catalytic property of complexes for the oxidation of model sulfides 1-hexanethiol,dibutyl sulfide,and 2-methylthiophene along with their influencing factors were explored,while the oxidized products of the model sulfides were also analyzed and characterized.The results show that the catalytic oxidation property of the complexes is determined by their oxygen carrying performance and solubility in n-octane.The oxygen carrying performance of the complexes is mainly affected by the central ion species,the electronic effects,and the spatial effects of the substituents as well as the degree of conjugation.More specifically,the oxygen carrying performance can be improved by enhancing the oxygenation capacity of the central metal ions,increasing the electron donating ability of the ligand substituent,and diminishing the steric hindrance as well as extending the conjugated chain.Complexes C7 were found to be with high oxygen carrying capacity and high solubility in n-octane,which shows the best catalytic oxidation property,and the oxidation conversion rates for 1-hexylthiol,dibutyl sulfide,and 2-methylthiophene are 74.2%,65.1%,and 22.7%,respectively.Upon using the oxidation catalyst of Schiff base metal complexes,three sulfides can be oxidized by oxygen to form sulfones and sulfoxides.1-Hexanethiol and dibutyl sulfide will continue to be oxidized to form sulfates and sulfites. | Jia Chaoyang Liang Shuyuan Liu Lei Shao Xue Zhang Longli Wang Fangzhu Jiang Cuiyu | 2021 | China Petroleum Processing & Petrochemical Technology2021，23，1： | 2 |
| 2 | 氢键的协同作用驱动水中苯甲醛的合成(英文)显示文摘以环氧氯丙烷作为交联溶剂合成和表征了纤维素功能化的β-环糊精,考察了这种超分子聚合物作为一种多相催化剂用于苯甲醛的合成的催化性能.结果表明,该催化剂在温和的反应条件下具有较高的催化活性和选择性,容易恢复和重新利用,且活性没有大的损失.进一步研究指出,β-环糊精聚合物中的β-环糊精能通过非极性共价键与肉桂醛形成主客包结物,此外,β-环糊精和纤维素的功能基团能与肉桂醛通过O–HβββO的氢键形成多重氢键的相互作用,这种氢键的协同作用明显提高了催化剂的性能. | 杨祖金 纪红兵 | 2014 | 催化学报2014，35，4： | 0 |
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