Microchemical Journal, Journal Year: 2025, Volume and Issue: unknown, P. 113960 - 113960
Published: May 1, 2025
Language: Английский
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(29), P. 19680 - 19685
Published: July 9, 2024
The pore shapes of two-dimensional covalent organic frameworks (2D COFs) significantly limit their practical applications in separation and catalysis. Although various 2D COFs with polygonal pores have been well developed, constructing pentagonal remains an enormous challenge. In this work, we developed one kind the
Language: Английский
Citations
20
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(31), P. 40371 - 40390
Published: July 29, 2024
Enzymes, a class of biocatalysts, exhibit remarkable catalytic efficiency, specificity, and selectivity, governing many reactions that are essential for various cascades within living cells. The immobilization structurally flexible enzymes on appropriate supports holds significant importance in facilitating biomimetic transformations extracellular environments. Covalent organic frameworks (COFs) have emerged as ideal candidates enzyme due to high surface tunability, diverse chemical/structural designs, exceptional stability, metal-free nature. Various techniques been proposed fabricate COF-enzyme biocomposites, offering enhancements activity reusability COF-immobilized well new insights into developing advanced enzyme-based applications. In this review, we provide comprehensive overview state-of-the-art strategies immobilizing COFs by focusing their applicability versatility. These systematically summarized compared categorizing them postsynthesis situ immobilization, where respective strengths limitations thoroughly discussed. Combined with an critical emerging applications, further elucidate the multifaceted roles subsequent highlighting biofunctionality achievable through COFs.
Language: Английский
Citations
14
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Nov. 6, 2024
Covalent organic frameworks have emerged as a thriving family in the realm of photocatalysis recently, yet with concerns about their high exciton dissociation energy and sluggish charge transfer. Herein, strategy to enhance built-in electric field series β-keto-enamine-based covalent by ionic polarization method is proposed. The achieved through distinctive post-synthetic quaternization reaction which can endow separated centers comprising cationic skeleton iodide counter-anions. stronger generated between framework anions promotes transfer efficiency. Moreover, introduced not only serve lowered H* formation barrier, but also act electron extractant suppressing recombination electron-hole pairs. Therefore, photocatalytic performance shows notable improvement, among CH3I-TpPa-1 deliver an H2 production rate up 9.21 mmol g−1 h−1 without any co-catalysts, representing 42-fold increase compared TpPa-1, being comparable or possibly exceeding current photocatalysts addition Pt co-catalysts. (COFs) show great promise are limited slow Here, authors report COFs via polarization, resulting hydrogen evolution g-¹ h-¹
Language: Английский
Citations
10
ACS Nano, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 7, 2025
Encapsulating living cells within nanoshells offers an important approach to enhance their stability against environmental stressors and broaden application scope. However, this often leads impaired mass transfer at the cell biointerface. Strengthening protective shell with well-defined, ordered transport channels is crucial regulating molecular maintaining viability biofunctionality. Herein, we report construction of covalent organic framework (COF) mesoporous shells for single-cell nanoencapsulation, providing selective permeability comprehensive protection microbial cells. The COF ensure nutrient uptake while blocking large harmful molecules UV-C radiation, thereby preserving metabolic activity. Integration such crystalline porous genetically modified factories production further investigated, revealing no adverse effects, as demonstrated by riboflavin production. Moreover, effectively shields cells, ensuring efficient bioproduction even after being treated under harsh conditions. This versatile encapsulation applicable different types, a robust platform surface engineering.
Language: Английский
Citations
2
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 14, 2025
Dynamic covalent organic frameworks (COFs) represent an emerging class of porous materials with inherent structural flexibility. However, due to the challenges in their synthesis and characterization, research on dynamic COFs remains at early stage requires further exploration. Herein, we report designed a novel COF entangled 2D layers that exhibits interesting behavior response vapor exposure. By employing continuous rotation electron diffraction technique, precisely resolved crystal structures before after adsorption. Structural analysis revealed vapor-induced conformational changes, such as anthracene unit rotation, triggered layer adjustments reduced entanglement angles, leading significant pore structure alterations. This study not only introduces new but also provides foundation for rational design flexibility diverse applications.
Language: Английский
Citations
2
Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(27), P. 11869 - 11886
Published: June 28, 2024
Developing efficient technologies to eliminate or degrade contaminants is paramount for environmental protection. Biocatalytic decontamination offers distinct advantages in terms of selectivity and efficiency; however, it still remains challenging when applied complex matrices. The main challenge originates from the instability difficult-to-separate attributes fragile enzymes, which also results issues compromised activity, poor reusability, low cost-effectiveness, etc. One viable solution harness biocatalysis environments known as enzyme immobilization, where a flexible tightly fixed solid carrier. In case reticular crystal utilized support, feasible engineer next-generation biohybrid catalysts functional complicated media. This can be interpreted by three aspects: (1) highly crystalline skeleton shield immobilized against external stressors. (2) porous network ensures high accessibility interior catalytic decontamination. And (3) adjustable unambiguous structure framework favors in-depth understanding interfacial interaction between enzyme, turn guide us designing active biocomposites. Review aims introduce this emerging technology involving pollutant degradation greenhouse gas (carbon dioxide) conversion, with emphasis on immobilization protocols diverse catalysis principles including single catalysis, cascades, photoenzyme-coupled catalysis. Additionally, remaining challenges forward-looking directions field are discussed. We believe that may offer useful biocatalytic contribute green sustainable manner will inspire more researchers at intersection environment science, biochemistry, materials science communities co-solve problems.
Language: Английский
Citations
8
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 1, 2024
Developing new enzyme-immobilization systems to stabilize their dynamic structures and meanwhile enhance catalytic activity is of great significance but very challenging. Herein, we design fabricate a class robust mesoporous covalent organic frameworks (COFs) via Michael addition-elimination reaction. It found that highly crystalline COFs can be produced in 10 min, which attributed the promoting effect intramolecular hydrogen bond activation. The rich hydroxyl groups facilely post-modified by epibromohydrin covalently immobilize enzymes with both high loading activity. Furthermore, create solar-driven photothermal-promoted strategy introducing photoactive azo COF carriers, boost enzyme performance (lipase) much higher conversion various racemic substrates chiral resolution upon solar light irradiation. heterogeneous biocatalysts also demonstrate exceptional reusability stability. This work provides green energy-efficient approach facilitate scale application enzyme-immobilized biocatalysts.
Language: Английский
Citations
7
Small, Journal Year: 2024, Volume and Issue: 20(43)
Published: June 19, 2024
Precise self-assembly of colloidal particles is crucial for understanding their aggregation properties and preparing macroscopic functional devices. It currently very challenging to synthesize self-assemble super-uniform covalent organic framework (COF) into well-organized multidimensional superstructures. Here, simple versatile strategies are proposed synthesis COF them 1D supraparticles, 2D ordered mono/multilayers, 3D films. For this purpose, several techniques developed, including emulsion solvent evaporation, air-liquid interfacial self-assembly, drop-casting. These enable the superstructural varying sizes species without any additional surfactants or chemical modifications. The assembled superstructures maintain porosity high specific surface area building blocks. feasibility examined with different types COFs. This research provides a new approach controllable capable self-assembling long-range order. discoveries hold great promise design emerging multifunctional
Language: Английский
Citations
6
Small, Journal Year: 2024, Volume and Issue: 20(35)
Published: April 24, 2024
Covalent organic frameworks (COFs) constitute a promising research topic for photocatalytic reactions, but the rules and conformational relationships of 1D COFs are poorly defined. Herein, chain edge structure is designed by precise modulation at atomic level, bonded C, O, S elements directionally prepared oxygen-tolerant photoinduced electron transfer-atom transfer radical polymerization (PET-ATRP) reactions. It demonstrated that heteroatom-type structures (─O─, ─S─) lead to decrease in intra-plane conjugation, which restricts effective transport photogenerated electrons along direction strip. In contrast, all-carbon type (─C─) with higher conjugation not only reduces energy loss photoexcited also enhances carrier density, exhibits optimal photopolymerization performance. This work offers valuable guidance exploitation high
Language: Английский
Citations
5
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(24), P. 16369 - 16374
Published: June 6, 2024
Here we present, for the first time, selective adsorption of denatured proteins using a metal–organic framework (MOF), demonstrating promising potential protein purification. Typical proteins, such as lysozyme and carbonic anhydrase B, enter pores MIL-101 through their narrow apertures when they are to an unfolded state. Selective is achieved by finely tuning two key features: sizes aperture cage MOF nanopores, which responsible sorting polypeptide chains inhibiting translocation native form into pores, respectively. By leveraging this adsorption, successfully purified mixture adding mixture, achieving purity over 99%.
Language: Английский
Citations
5