Publications by authors named "Yingxue Diao"
Charge Separation in Metal-Organic Framework Enables Heterogeneous Thiol Catalysis.
Angew Chem Int Ed Engl
June 2023
Article Synopsis
- Researchers successfully utilized a photoactivated metal-organic framework (MOF), Zr-TPDCS-1, to enable heterogeneous thiol catalysis, marking a novel achievement in the field.
- The structure of Zr-TPDCS-1 includes Zr clusters and TPDCS linkers, which facilitate multiple organic transformations like borylation and silylation through the generation of thiyl radicals upon light exposure.
- The process was efficient at a gram scale, demonstrating a high turnover number (≈3880) and allowing for easy product separation, indicating strong potential for practical applications in chemical synthesis.
Article Synopsis
- The text is a correction to a previously published article with the DOI 10.1021/acsaem.2c00977.
- It addresses inaccuracies or errors found in the original article.
- The correction aims to clarify the information presented and ensure accuracy in the published research.
Article Synopsis
- - The study discusses a unique linker molecule that combines pyrazole and vicinal alkynyl groups to create a Ni-pyrazolate scaffold, leading to the construction of nanographene units.
- - Unlike previous Ni-pyrazolate networks, this one shows a deficiency in linker connectivity, resulting in many Ni(II) sites being capped by acetate ligands that could be removed to increase reactivity.
- - The resulting scaffold not only maintains its crystalline structure after heat treatment but also enhances electroactive properties, making it competitive with advanced materials for hydrogen evolution reactions (HER).
Article Synopsis
- A novel 2D metal-organic framework called USTS-7 was created using Zr(IV) and a specific organic acid.
- USTS-7 is stable in various environments, including water and extreme pH conditions.
- This framework shows high luminescence and can selectively detect chromium oxide (CrO) in aqueous solutions at very low concentrations.
Article Synopsis
- Donor-acceptor two-dimensional covalent organic frameworks (COFs), specifically PD-COF-23 and PD-COF-23-Ni, are developed for reducing CO2 with notable CO conversion rates of 20.9 and 40.0 μmol g-1 h-1, respectively.
- These COFs achieve these rates without the need for extra photosensitizers or noble metal co-catalysts during a 25-hour operation period.
- PD-COF-23-Ni outperforms PD-COF-23 in photocatalytic efficiency due to its unique multilayer nanosheet design and effective charge separation and transport mechanisms.
Article Synopsis
- Researchers tackled two main challenges in perovskite solar cells: long-term stability and lead ion leakage.
- They introduced a thiol-functionalized 2D conjugated metal-organic framework to improve performance at the perovskite/cathode interface, achieving a power conversion efficiency of 22.02%.
- Their modified solar cells maintained over 90% efficiency after 1,000 hours of intense testing and effectively captured leaked lead, enhancing both stability and safety for future perovskite photovoltaic technologies.
Article Synopsis
- The study focuses on using a chemical reaction to enhance cross-linking in a coordination host using porphyrin guests, enabling further functional modifications.
- A special linker with thiol-flanked carboxyl units is combined with zirconium chloride to create a stable, porous two-dimensional framework that accommodates large metalloporphyrin guests.
- The incorporation of these metalloporphyrins enhances the framework's ability for photocatalytic hydrogen production, while a new synthetic method improves the accessibility of crucial building blocks for this process.
Article Synopsis
- The study presents stable porous solids with specific sulfur substitutions on organic linkers, allowing for various functional applications.
- Unexpectedly, controlled reactions between NaSMe and octafluorobiphenyl-4,4'-dicarboxylic acid enable the creation of four distinct sulfur-substituted molecules.
- The resulting Zr(IV)-based crystalline solids exhibit significant stability in boiling water and air, while the thioether groups enhance their hydrophilicity, luminescence, and proton conductivity.
Article Synopsis
- Researchers developed a stable porous sorbent using a zirconium MOF template by transforming thioalkyl groups and metal clusters, combining sulfoxide/sulfone and phosphoric acid in a single polymer framework.
- The new sorbent demonstrated excellent sorption performance for europium (Eu(III)), achieving a high maximum capacity of 220 mg/g at pH 4.0 and room temperature while showing a strong chemical affinity.
- This work highlights the environmentally friendly approach of creating multifunctional sorbents and confirms their effectiveness and recyclability for removing europium from water.
Article Synopsis
- Finely dispersed cobalt species (Co(0) and CoO) were integrated into a metal-organic framework (MOF) to enhance its catalytic properties.
- The MOF's design utilizes unique alkyne units that improve interactions with cobalt, and features a special linker that adds fluorescence and a unique structure.
- The resulting MOF undergoes a transformation that enables it to release CoO, which, after being heat-treated, turns into an effective electrocatalyst for oxygen evolution reactions.
Thiol groups (-SH) offer versatile reactivity for functionalizing metal-organic frameworks, and yet thiol-equipped MOF solids remain underexplored due to synthetic challenges. Building on the recent breakthrough using benzyl mercaptan as the sulfur source and AlCl for uncovering the thiol function, we report on the thiol-equipped linker 3,3'-dimercaptobiphenyl-4,4'-dicarboxylic acid and its reaction with Zr(IV) ions to form a UiO-67-type MOF solid with distinct functionalities. The thiol-equipped UiO-67 scaffold shows substantial stability toward oxidation, e.
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- * The process starts with assembling the MOF and then inducing thermocyclization to create fused-aromatic bridges within the structure, which maintains its crystal order.
- * This cyclization reinforces the structural integrity of the MOF and boosts its electroactivity and charge transport capabilities across the network.