Crystallizing Sub 10 nm Covalent Organic Framework Thin Films via Interfacial–Residual Concomitance

• DOI: 10.1021/jacs.1c09740
• Publication Date: 2021-12-02T20:33:11Z
• Authors: Ashok Kumar Mahato; Saikat Bag; Himadri Sekhar Sa...; Kaushik Dey; Indrajit Giri; Mercedes Linares-...; Carlos Carbonell; Paolo Falcaro; E. Bhoje Gowd; Ratheesh K Vijaya...; Rahul Banerjee
• Keywords: 01 natural sciences; 0104 chemical sciences

Synthesis of covalent organic framework (COF) thin films on different supports with high crystallinity and porosity is crucial for their potential applications. We have designed a new synchronized methodology, residual crystallization (RC), to synthesize sub 10 nm COF films. These crystallized showcase surface area, crystallinity, conductivity at room temperature. used interfacial (IC) as rate-controlling tool simultaneous crystallization. also diversified the methodology by utilizing two pathways: fiber-to-film (F-F) sphere-to-film (S-F). In both cases, we could obtain continuous grown various substrates (the highest area TpAzo film being 2093 m2 g-1). Precise control over allows synthesis macroscopic defect-free minimum thickness ∼1.8 nm. synthesized (TpAzo TpDPP) using F-F S-F pathways such borosilicate glass, FTO, silicon, Cu, metal, ITO. Also, investigated mechanism growth these wettability. Further, hydrophilic support (glass) was grow in situ four-probe system device fabrication. All exhibit outstanding values. 3.7 × 10-2 mS cm-1