首页|Functional decoration on a regenerable bifunctional porous covalent organic framework probe for rapid detection and adsorption of copper ions

Functional decoration on a regenerable bifunctional porous covalent organic framework probe for rapid detection and adsorption of copper ions

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Developing fluorescence porous probe for detecting and eliminating Cu2+contamination in water or biosystem is an essential research project that has attracted considerable attention.However,improving the fluores-cence detecting efficiency while enhancing the adsorption capacity of the porous probe is of great challenge.Herein,a bifunctional two-dimensional imine-based porous covalent organic framework(TTP-COF)probe was designed and synthesized from 1,3,5-tris(4-aminophenyl)benzene(TAPB)and 2,4,6-Triformylphloroglucinol(TP)ligand.TTP-COF displayed rapid detection of Cu2+(limit of detection(LOD)=10 nmol·L-1 while achieving a high adsorption capacity of 214 mg·g-1(pH=6)at room temperature with high reusability(＞5 cycles).The key roles and contributions of high π-conjugate and delocalized electrons in TABP and functional-OH groups in TP were proved.More importantly,the fluorescence quenching mechanism of TTP-COF was studied by density functional theory theoretical calculations,revealing the crucial role of intramolecular hydrogen bonds among C=N and-OH groups and the blocking of the excited state intramolecular proton transfer process in detecting process of Cu2+.

Covalent organic framework(COF)Excited-state intramolecular proton transfer(ESIPT)Copper ion detectionCopper ion adsorptionRenewability

Yu-Long Li、Xi-Lang Jin、Yi-Ting Ma、Jing-Rui Liu、Fazal Raziq、Peng-Yuan Zhu、Zhi-Feng Deng、Hong-Wei Zhou、Wei-Xing Chen、Wen-Huan Huang

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School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an 710021,China

Yulin Boyi-Jingking Research Institute of Industrial Technology Development Research,Yulin 719054,China

KAUST Catalysis Center,King Abdullah University of Science and Technology,23955-6900 Thuwal,Kingdom of Saudi Arabia

Key Laboratory of Chemical Additives for China National Light Industry,College of Chemistry and Chemical Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China

National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology,School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723001,China

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国家自然科学基金国家自然科学基金Innovation Capability Support Program of ShaanxiTechnology Innovation Leading Program of Shaanxi

22001156222711782022KJXX-882020QFY07-05

2024

10.1007/s12598-023-02476-w

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(2)
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