Zr-based metal-organic framework with dual Br?nsted acid-base functions

2018 International Joint Conference on Materials Science and Mechanical Engineering

Pratanpornlerd, W.^1 ; Bureekaew, S.^1

School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong

21210, Thailand^1

关键词: Amino functional group;    Co-operative effects;    High thermal stability;    Metal organic framework;    Metalorganic frameworks (MOFs);    Multi-functional;    Multifunctionality;    Solvothermal method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/383/1/012011/pdf
DOI  :  10.1088/1757-899X/383/1/012011

来源: IOP

【 摘 要 】

Design and synthesis of metal-organic frameworks (MOFs) with multi-functionality have attracted a lot of attention since the different functional groups can enhance the cooperative effect providing properties superior to those found in mono-functional MOFs. The efficiency and selectivity of the reactions can be improved by the simultaneous activation of multi-functional catalysts. Herein, a series of Brønsted acid-base bifunctional UiO-66 bearing acidic sulfo- and basic amino- functional groups were successfully prepared via a simple one-pot solvothermal method. PXRD patterns of the bifunctional frameworks were similar to that of simulated UiO-66. The existence of sulfo-and amino- functional groups was investigated by IR and H1-NMR. The bifunctional frameworks showed high thermal stability up to 300°C examined by TGA. By varying the molar ratios of ligands, the proportions of acidic and basic moieties in the framework were successfully tuned. The amount of functional groups anchoring in resulting frameworks was determined by 1H-NMR. This bifunctional UiO-66 was tested for CO2 capture.