In Situ Bottom-up Synthesis of Porphyrin-Based Covalent Organic Frameworks [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 537.6 Electrodynamics (Electric currents) and thermoelectricity
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2019
• Mô tả vật lý: Size: p. 19560-19564 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 256121
• Chủ đề: 1. 30 direct energy conversion; 2. 37 inorganic, organic, physical, and analytical chemistry; 3. Catalysis; 4. Catalyst synthesis; 5. Covalent organic framework (cof); 6. Electrochemical deposition; 7. Et al; 8. Nanoporous; 9. Oxygen reduction reaction (orr); 10. Pyridines; 11. Redox reactions

Tóm tắt

Synthesis and processing of two- or three- dimensional covalent organic frameworks (COFs) have been limited by solvent intractability and sluggish condensation kinetics. Here, we report on the electro- chemical deposition of poly(5,10,15,20-tetrakis(4- aminophenyl)porphyrin)-covalent organic frameworks (POR-COFs) via formation of phenazine linkages. Here, by adjusting the synthetic parameters, we demonstrate the rapid and bottom-up synthesis of COF dendrites. Both experiment and density functional theory underline the prominent role of pyridine, not only as a polymerization promoter but as a stabilizing sublattice, cocrystallizing with the framework. The crucial role of pyridine in dictating the structural properties of such a cocrystal (Py- POR-COF) is discussed. Also, a structure-to-function relationship for this class of materials, governing their electrocatalytic activity for the oxygen reduction reaction in alkaline media, is reported.