Dense Dithiolene Units on Metal–Organic Frameworks for Mercury Removal and Superprotonic Conduction
Source abstract
Abstract
With 2-COOH and 4-SH donors all packed onto the benzene ring, tetrasulfanyl terephthalic acid (TST) is a simple yet fully equipped ligand to move the field of metal-coordination materials─it is now accomplished. The hard-soft carboxyl-thiol synergy is leveraged here in selectively bonding the carboxyl units to Zr(IV) ions to form the same cubic net of UiO-66 (this being based on the terephthalic linker)─with the free-standing dithiolene units equipping the grid of ZrTST. The 3D network of ZrTST averages about 7.6 connections [as in Zr6O4(OH)4(C8H4O4S4)3.8], with the other 4.4 sealed by acetate ions. The ZrTST solid is stable in boiling water (it is formed in water/acetic acid/ethane dithiol) and remains ordered even above 300 °C. The thiol-enabled ZrTST (powder) takes up mercury from water with a high distribution coefficient Kd (e.g., 1.2 × 106 mL·g–1); it also shows proton conductivity (1.9 × 10–3 S·cm–1 at 90 °C and 90% relative humidity), which, most notably, increases to a highest value of 3.7 × 10–1 S·cm–1 after oxidizing the −SH into the −SO3H groups.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Organic and Molecular Conductors Research · Covalent Organic Framework Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
Southern University of Science and Technology, Shenzhen 518055, China
Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China
Funding
National Natural Science Foundation of China · Science and Technology Planning Project of Guangdong Province · GRF grant from the Research Grants Council of HKSAR · SRG grant of the City University of Hong Kong · Science and Technology Program of Guangzhou · Foundation of Basic and Applied Basic Research of Guangdong Province · Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program · Guangdong Special Support Project
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