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Hierarchically Nanoporous Titanium-Based Coordination Polymers for Photocatalytic Synthesis of Benzimidazole
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-10-27 , DOI: 10.1021/acsanm.0c01953
Zhijing Li 1 , Zecheng Ye 1 , Limin Chen 2 , Jie Cui 3 , Jinzhu Chen 1
Affiliation  

Construction of macroporosity-added hierarchical porous coordination polymers (CPs) as nanocatalysts is of great significance for their improved catalytic performance by promoting mass transfer and molecular accessibility. We present an efficient and one-step fabrication process of hierarchically macro/mesoporous titanium-based CP materials by using CO2-derived “distillable” ionic liquids (ILs) as a “reactive” solvent through a template-free strategy. The as-synthesized sponge-like CPs, composed of titanium terephthalate units, show a macropore-size range from 120 to 470 nm with a mean mesopore size of 7.6 nm. The defect-formation mechanism is proposed for macro/mesoporous CP formation via IL-induced uniquely synergistic effects of CO2 bubble perturbation, base-etching, pore-expanding, and reconstruction in one step. The hierarchical CP-derived macro/mesoporous semiconductor integrates a high thermostability and special porosity, which make it an efficient photocatalyst for green synthesis of benzimidazole from 1,2-phenylenediamine and ethanol (or triethylamine) under visible light irradiation.

中文翻译:

纳米级多孔钛基配位聚合物用于光催化合成苯并咪唑

构建具有大孔率的分级多孔配位聚合物(CPs)作为纳米催化剂,对于通过促进传质和分子可及性改善其催化性能具有重要意义。我们通过无模板策略,通过使用源自CO 2的“可蒸馏”离子液体(ILs)作为“反应性”溶剂,提出了一种高效的,一步一步的制造宏观/介孔钛基CP材料的方法。合成后的由对苯二甲酸钛单元组成的海绵状CP的大孔尺寸范围为120至470 nm,平均中孔尺寸为7.6 nm。提出了通过IL诱导的CO 2独特协同作用形成宏观/近中CP的缺陷形成机制气泡扰动,基础蚀刻,孔扩展和重建,只需一步即可。源自CP的分层宏观/介孔半导体具有很高的热稳定性和特殊的孔隙率,这使其成为在可见光照射下由1,2-苯二胺和乙醇(或三乙胺)绿色合成苯并咪唑的有效光催化剂。
更新日期:2020-11-25
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