ACS Applied Materials & Interfaces, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 24, 2024
Coordination polymers (CPs) have been identified as promising candidate materials in the field of proton conduction owing to their customizable and diverse structures. However, research on CPs based alkali metal ions has less advanced, mechanism transport these remains unclear. Herein, a new coordination polymer, [Na
Язык: Английский
Journal of the American Chemical Society, Год журнала: 2024, Номер 146(33), С. 23497 - 23507
Опубликована: Авг. 8, 2024
Tailormade bottom-up synthesis of covalent organic frameworks (COFs) from various functional building blocks offer not only tunable topology and pore size but also multidimensional properties. High crystallinity is one the prerequisites for their structures associated physicochemical Among different π-conjugated motifs constructing COFs, pyrene-based tetragonal are effective in achieving highly ordered crystalline states. In present research, we demonstrated that substitution pyrene with 2,7-diazapyrene produces nearly "flat" two-dimensional (2D) COF layers by controlling torsional angle linker molecules. Featuring finite diameters excellent thermodynamic stability ∼500 °C, face-to-face (slipped AA) stacking arrangements were produced. Extended electrical conjugation spanning 2D frames modest optical bandgaps (Eg) ∼2.1 eV shows planar character diazapyrene-based COFs. The conjugated small Eg values beneficial formation stable conducting pathways state, which was confirmed results microwave conductivity measurements. Nitrogen centers diazapyrene units play a key role as active sites proton transfer, maximum σ = 10–2 S cm–1 achieved along cocontinuous nanopore surrounded sites. Results show COFs based on can be used material special proton-conducting capabilities.
Язык: Английский
Процитировано
4
Science China Chemistry, Год журнала: 2025, Номер unknown
Опубликована: Янв. 2, 2025
Язык: Английский
Процитировано
0
Macromolecular Chemistry and Physics, Год журнала: 2025, Номер unknown
Опубликована: Апрель 14, 2025
Abstract Heavy metal contamination in water threatens human health and ecological security, necessitating efficient sustainable remediation technologies. Adsorption is a widely used method due to its cost‐effectiveness, high selectivity, ease of operation. Among various adsorbents, conjugated microporous polymers (CMPs) have shown great potential for heavy removal, benefiting from their π‐conjugated structures, surface area, tunable pore sizes, strong ion interactions. However, challenges remain synthesis material properties. Extensive postsynthetic modifications may introduce structural complexity compromise adsorption performance, while excessive functionalization can lead blockage, reducing available sites. Additionally, inadequate distribution or low grafting density chelating groups weaken binding. Further include enhancing developing eco‐friendly regeneration methods, improving stability complex environments, achieving large‐scale production. Addressing these issues requires optimizing synthetic strategies, precisely incorporating functional groups, structure control. This review summarizes recent advances CMP‐based adsorption, discusses mechanisms optimization, identifies future research directions advance practical application purification.
Язык: Английский
Процитировано
0
ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(36), С. 48203 - 48210
Опубликована: Авг. 30, 2024
While covalent organic frameworks (COFs) have been extensively investigated in the field of electrolyte materials, there is potential for further enhancement their room-temperature ionic conductivity. This study introduces a novel methodology to induce self-exfoliation parent COF during synthesis through postmodification technique. process yields nanosheets that feature pyridinium sulfobetaine groups, referred as PS-CON. Due strategic arrangement cations and anions, charge distribution PS-CON varies substantially, leading significant lithium-ion dissociation. The methodically organized one-dimensional pore channels, along with linear structure facilitate transport. demonstrated remarkable conductivity 2.19 × 10–4 S cm–1and low activation energy (0.26 eV) coupled broad electrochemical stabilization window (4.05 V). Furthermore, symmetrical cell (Li|Li@PS-CON|Li) demonstrates stable Li plating/stripping more than 1200 h, which highlights vast pyridinium-sulfobetaine based zwitterionic high-performance electrolytes.
Язык: Английский
Процитировано
2
Chemistry of Materials, Год журнала: 2024, Номер unknown
Опубликована: Окт. 1, 2024
Язык: Английский
Процитировано
1
Carbohydrate Polymers, Год журнала: 2024, Номер 348, С. 122835 - 122835
Опубликована: Окт. 5, 2024
Язык: Английский
Процитировано
0
ACS Applied Materials & Interfaces, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 24, 2024
Coordination polymers (CPs) have been identified as promising candidate materials in the field of proton conduction owing to their customizable and diverse structures. However, research on CPs based alkali metal ions has less advanced, mechanism transport these remains unclear. Herein, a new coordination polymer, [Na
Язык: Английский
Процитировано
0