Photocatalytic C(sp3)-H and C(sp2)-H Carboxylation of Amines with CO2 Using a Sustainable Covalent Organic Framework/gC3N4 Composite DOI

Pekham Chakrabortty,

Anjan Kumar Das, Swarbhanu Ghosh

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(28), P. 12413 - 12428

Published: July 4, 2024

Carboxylation of amines is an important route to obtain amino acids. Herein, we have reported the synthesis and characterizations a new COF/gC3N4 composite which acted as heterogeneous photocatalyst for carboxylation unprotected indoles N-Boc-benzyl amines. We used SnO2 nanoparticles cocatalyst CO2 carbon source under visible light irradiation. This gave range carboxylated products both with N-Boc-benzylamines high yield. Control experiments optimum reaction conditions this photocatalytic carboxylation. Light dependency was confirmed by altering intensity light. Here, synthesized two different catalysts, TpBpy Tz COF, gC3N4 heterojunction showed excellent activity. The photocatalysts, COF/gC3N4, are recyclable reusable several cycles without significant loss in performance. drug compound Clopidogrel formation unit Tirofiban demonstrated these protocols.

Language: Английский

In situ XPS evidence of fully conjugated COF and C3N4 construct S-scheme heterojunction boosting photogenerated carriers transfer and separate for efficiently photocatalytic hydrogen evolution DOI
Zhenkun Liu, Ya Zhang, Youlin Wu

et al.

Journal of Material Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

Citations

0
Covalent Organic Framework Nanofilm Heterojunctions: Lamination Effect and Suppressed Self‐Discharge in Flexible Micro‐Supercapacitors Energy Storage DOI Creative Commons
Xiaoyang Xu, Li Tian, Ruijuan Zhang

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Covalent organic frameworks (COFs) nanofilms with well-ordered channels and highly active interfaces have great potential in in-plane micro-supercapacitors (MSCs). COF heterojunction integrate the benefits of individual phases through alternating stacking. Herein, sandwich-type heterojunctions are prepared under van der Waals bonding, controlling larger outer aperture (vs. inner) to create stereoscopic lamination effect axial channel structure, which enhances rapid transport electrolyte H⁺ their concentrated accumulation on interfaces. Simultaneously, unique structure effectively reduces resistance electron transport, enabling electrons conduct π-electron clouds facilitating π-π transitions across In addition, is also adjusted inhibit H+ overflow causing self-discharge phenomenon. The results show that optimal MSC-COF1.0-0.6-1.0 exhibits a high volumetric specific capacitance (CV) 598.6 F cm-3, energy density 40.7 mWh cm-3 at 2095.2 mW good property up 36 h, excellent cycling bending-resistant stability. This work about integration multiple factors heterojunctions, including effect, interface contribution, ion overflow, can provide theoretical guidance for application miniature or flexible/wearable devices.

Language: Английский

Citations

0
Vacancy engineering mediated VOMnWO4/Mn0.2Cd0.8S S-scheme heterojunction with dual-photo-induced carrier transfer pathways in photocatalytic hydrogen evolution DOI

Qingyang Pang,

Youlin Wu, Kangle Li

et al.

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 133118 - 133118

Published: April 1, 2025

Language: Английский

Citations

0
MOFs as platforms for multiscale structural regulation: new frontiers in photocatalyst design DOI Open Access
Jianqiao Liu,

Zili Gong,

Di Wu

et al.

Microstructures, Journal Year: 2025, Volume and Issue: 5(3)

Published: April 25, 2025

Photocatalysis plays a pivotal role in sustainable technology, driving pollutant degradation and energy conversion through solar-driven chemical reactions. However, conventional photocatalysts are limited by their structural tunability, hindering adaptability to evolving photocatalytic applications. This underscores the urgent need for innovative approaches overcome these challenges. Metal-organic frameworks (MOFs), with tunable structures, offer promising solution overcoming limitations. Here, we demonstrate comprehensive overview of regulation strategies MOFs, emphasizing evolution across multiple scales enhance performance. review begins detailing photoelectric characteristics MOFs development effectiveness. An in-depth analysis is undertaken into - macroscale, mesoscale, atomic-scale, electronic-scale. The synergistic interactions among levels further explored, revealing collective contribution improved efficiency. These insights emphasize that adaptable design serve as pathways advancements photocatalyst engineering. Finally, examine current applications structures provide perspectives on future challenges this field. offers critical MOF regulation, highlighting its innovations expanding technologies.

Language: Английский

Citations

0
Photocatalytic C(sp3)-H and C(sp2)-H Carboxylation of Amines with CO2 Using a Sustainable Covalent Organic Framework/gC3N4 Composite DOI

Pekham Chakrabortty,

Anjan Kumar Das, Swarbhanu Ghosh

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(28), P. 12413 - 12428

Published: July 4, 2024

Carboxylation of amines is an important route to obtain amino acids. Herein, we have reported the synthesis and characterizations a new COF/gC3N4 composite which acted as heterogeneous photocatalyst for carboxylation unprotected indoles N-Boc-benzyl amines. We used SnO2 nanoparticles cocatalyst CO2 carbon source under visible light irradiation. This gave range carboxylated products both with N-Boc-benzylamines high yield. Control experiments optimum reaction conditions this photocatalytic carboxylation. Light dependency was confirmed by altering intensity light. Here, synthesized two different catalysts, TpBpy Tz COF, gC3N4 heterojunction showed excellent activity. The photocatalysts, COF/gC3N4, are recyclable reusable several cycles without significant loss in performance. drug compound Clopidogrel formation unit Tirofiban demonstrated these protocols.

Language: Английский

Citations

3