In 2019,ACS Applied Materials & Interfaces included an article by Xiao, Ankang; Zhang, Zhe; Shi, Xiansong; Wang, Yong. Reference of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde. The article was titled 《Enabling Covalent Organic Framework Nanofilms for Molecular Separation: Perforated Polymer-Assisted Transfer》. The information in the text is summarized as follows:
Covalent organic frameworks (COFs) with ordered arrays of sub-2 nm regular pores are drawing increasing attention in membrane separation, and it remains highly desirable for effective and controllable strategies to fabricate COF-based membranes. Herein, we demonstrate a perforated polymer-assisted transfer strategy enabling COF nanofilms for mol. separation Solvothermal synthesis is used for the confined growth of TpPa, a stable, imine-linked COF, on the smooth surfaces of silicon substrates. Continuous, crystalline COF nanofilms are obtained, and their thicknesses are tunable in the range from a few tens to several hundred nanometers depending on monomer concentrations and reaction time. A block copolymer layer is coated on the COF nanofilms, which is then perforated to produce interconnected mesopores by the mechanism of selective swelling-induced pore generation. The perforated polymer coating functions as a protective but permeable layer enabling the easy transfer of the COF nanofilm onto porous substrates. Thus, we obtain a new type of composite membranes with the microporous COF nanofilm as the selective layer, sandwiched between the macroporous substrate and the mesoporous protective layer. The composite membranes exhibit good separation performances with water permeance up to ∼51 L m-2 h-1 bar-1 and high rejection rates to various dyes. This work demonstrates a new method to prepare COF-based membranes for mol. separation, and the invented perforated polymer-assisted transfer technol. is expected to find applications in transferring other ultrathin materials to demanded substrates. The results came from multiple reactions, including the reaction of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Reference of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde)
2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives.Reference of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehydeFor acyl phloroglucinols, it is considered the largest category of compounds among phloroglucinols of natural characteristics.
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