Pyrazine‐Functionalized Donor–Acceptor Covalent Organic Frameworks for Enhanced Photocatalytic H2 Evolution with High Proton Transport DOI
Fengdong Wang, Lijuan Yang, Xinxin Wang

et al.

Small, Journal Year: 2023, Volume and Issue: 19(23)

Published: March 8, 2023

The well-defined 2D or 3D structure of covalent organic frameworks (COFs) makes it have great potential in photoelectric conversion and ions conduction fields. Herein, a new donor-accepter (D-A) COF material, named PyPz-COF, constructed from electron donor 4,4',4″,4'″-(pyrene-1,3,6,8-tetrayl)tetraaniline accepter 4,4'-(pyrazine-2,5-diyl)dibenzaldehyde with an ordered stable π-conjugated is reported. Interestingly, the introduction pyrazine ring endows PyPz-COF distinct optical, electrochemical, charge-transfer properties, also brings plentiful CN groups that enrich proton by hydrogen bonds to enhance photocatalysis performance. Thus, exhibits significantly improved photocatalytic generation performance up 7542 µmol g-1 h-1 Pt as cocatalyst, clear contrast PyTp-COF without (1714 ). Moreover, abundant nitrogen sites 1D nanochannels enable as-prepared COFs immobilize H3 PO4 carriers through bond confinement. resulting material has impressive 8.10 × 10-2 S cm-1 at 353 K, 98% RH. This work will inspire design synthesis COF-based materials both efficient future.

Language: Английский

A fluorescence-electrochemistry dual-mode imprinted sensing platform constructed by boric acid-functionalized MOF@COF core-shell composite for sensitive detection of glycoprotein DOI

Wei Hu,

Fubin Pei,

Bin Du

et al.

Sensors and Actuators B Chemical, Journal Year: 2024, Volume and Issue: 407, P. 135494 - 135494

Published: Feb. 19, 2024

Language: Английский

Citations

16
Solvothermal Template‐Induced Hierarchical Porosity in Covalent Organic Frameworks: A Pathway to Enhanced Diffusivity DOI Creative Commons
Fabian Heck, Lars Grunenberg, Nadine Schnabel

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Abstract The rapid advancement of covalent organic frameworks (COFs) in recent years has firmly established them as a new class molecularly precise and highly tuneable porous materials. However, compared to other materials, such zeolites metal‐organic frameworks, the successful integration hierarchical porosity into COFs remains largely unexplored. challenge lies identifying appropriate synthetic methods introduce secondary pores without compromising intrinsic structural COFs. In this study, template‐induced methodology is realized facilitate construction hierarchically (hCOFs). This novel approach utilizes commercially available zinc oxide nanoparticles hard template, enabling increase total pore volume series β ‐ketoenamine‐linked well an imine‐based COF while preserving their surface areas. addition transmission electron microscopy gas adsorption analyses, small‐angle X‐ray scattering pulsed field gradient nuclear magnetic resonance techniques are employed investigate diffusivity guest molecules within hCOFs. study demonstrates that nature hCOFs significantly reduces diffusion limitations, thus leading simultaneous enhancements capacity, diffusivity, catalytic performance.

Language: Английский

Citations

2
Advanced porous organic polymer membranes: Design, fabrication, and energy-saving applications DOI
Yanpei Song, Changjia Zhu, Shengqian Ma

et al.

EnergyChem, Journal Year: 2022, Volume and Issue: 4(4), P. 100079 - 100079

Published: June 28, 2022

Language: Английский

Citations

66
Post‐Nickelation of a Crystalline Trinuclear Copper Organic Framework for Synergistic Photocatalytic Carbon Dioxide Conversion DOI

Xinxin Wang,

Xu Ding,

Yucheng Jin

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(18)

Published: March 9, 2023

Rational regulation of electronic structures and functionalities framework materials still remains challenging. Herein, reaction 4,4',4''-nitrilo-tribenzhydrazide with tris(μ2 -4-carboxaldehyde-pyrazolato-N,N')-tricopper (Cu3 Py3 ) generates the crystalline copper organic USTB-11(Cu). Post-modification divalent nickel ions affords heterometallic USTB-11(Cu,Ni). Powder X-ray diffraction theoretical simulations reveal their two-dimensional hexagonal structure geometry. A series advanced spectroscopic techniques disclose mixed CuI /CuII state nature Cu3 in USTB-11(Cu,Ni) a uniform bistable Cu34+ (CuI2 CuII : Cu35+ (CuI CuII2 (ca. 1 3) oxidation state, resulting significantly improved formation efficiency charge-separation state. This endows Ni sites enhanced activity outstanding photocatalytic CO2 to CO performance conversion rate 22 130 μmol g-1 h-1 selectivity 98 %.

Language: Английский

Citations

39
Pyrazine‐Functionalized Donor–Acceptor Covalent Organic Frameworks for Enhanced Photocatalytic H2 Evolution with High Proton Transport DOI
Fengdong Wang, Lijuan Yang, Xinxin Wang

et al.

Small, Journal Year: 2023, Volume and Issue: 19(23)

Published: March 8, 2023

The well-defined 2D or 3D structure of covalent organic frameworks (COFs) makes it have great potential in photoelectric conversion and ions conduction fields. Herein, a new donor-accepter (D-A) COF material, named PyPz-COF, constructed from electron donor 4,4',4″,4'″-(pyrene-1,3,6,8-tetrayl)tetraaniline accepter 4,4'-(pyrazine-2,5-diyl)dibenzaldehyde with an ordered stable π-conjugated is reported. Interestingly, the introduction pyrazine ring endows PyPz-COF distinct optical, electrochemical, charge-transfer properties, also brings plentiful CN groups that enrich proton by hydrogen bonds to enhance photocatalysis performance. Thus, exhibits significantly improved photocatalytic generation performance up 7542 µmol g-1 h-1 Pt as cocatalyst, clear contrast PyTp-COF without (1714 ). Moreover, abundant nitrogen sites 1D nanochannels enable as-prepared COFs immobilize H3 PO4 carriers through bond confinement. resulting material has impressive 8.10 × 10-2 S cm-1 at 353 K, 98% RH. This work will inspire design synthesis COF-based materials both efficient future.

Language: Английский

Citations

27