Polymers, Год журнала: 2024, Номер 16(23), С. 3364 - 3364
Опубликована: Ноя. 29, 2024
To prepare novel biodegradable copolymers with functional substituents that are distributed statistically or randomly over the macromolecule chain and have improved characteristics compared to homopolymers, we conducted a series of synthetic experiments cyclic monomer, 5-(benzyloxy)-1,3-dioxepan-2-one (
Язык: Английский
Chemical Society Reviews, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Lignin and tannins can be functionalized or depolymerized to yield large libraries of organic molecules.
Язык: Английский
Процитировано
2
Molecules, Год журнала: 2024, Номер 29(10), С. 2307 - 2307
Опубликована: Май 14, 2024
The cycloaddition of CO2 to epoxides afford versatile and useful cyclic carbonate compounds is a highly investigated method for the nonreductive upcycling CO2. One main focuses current research in this area discovery readily available, sustainable, inexpensive catalysts, catalytic methodologies that allow their seamless solvent-free recycling. Water, often regarded as an undesirable pollutant process, progressively emerging helpful reaction component. On one hand, it serves hydrogen bond donor (HBD) enhance performance ionic compounds; on other aqueous media development diverse protocols can boost or ease recycling molecular catalysts. An overview advances use biphasic systems provided work along with recommendations possible future developments.
Язык: Английский
Процитировано
8
Precision Chemistry, Год журнала: 2024, Номер 2(9), С. 428 - 446
Опубликована: Июнь 6, 2024
Lignin, as the second largest renewable biomass resource in nature, has increasingly received significant interest for its potential to be transformed into valuable chemicals, potentially contributing carbon neutrality. Among different approaches, electricity-driven conversion holds great promise substitute a petroleum resource-driven one, owing characteristics of environmental friendliness, high energy efficiency, and tunable reactivity. The challenges lie on polymeric structure complex functional groups lignin, requiring development efficient electrocatalysts lignin valorization with enhanced activity selectivity toward targeted chemicals. In this Review, we focus advancement electrocatalytic from monomers, dimers raw various value-added emphasis catalyst design, reaction innovation, mechanistic study. general strategies design are also summarized, offering insights enhancing selectivity. Finally, perspectives proposed.
Язык: Английский
Процитировано
7
Tetrahedron, Год журнала: 2025, Номер unknown, С. 134485 - 134485
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
1
Chemical Communications, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 25, 2024
Recent works on practical and recyclable catalysts for the cycloaddition of CO 2 to epoxides are reviewed with an eye use inexpensive, readily-available, non-toxic materials future emerging designs.
Язык: Английский
Процитировано
6
Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 155635 - 155635
Опубликована: Сен. 1, 2024
Язык: Английский
Процитировано
5
ACS Omega, Год журнала: 2024, Номер 9(17), С. 19712 - 19722
Опубликована: Апрель 20, 2024
The utilization of biobased feedstocks to prepare useful compounds is a pivotal trend in current chemical research. Among varied portfolio naturally available starting materials, fatty acids are abundant, versatile substrates with multiple applications. In this context, the ethenolysis unsaturated acid esters such as methyl oleate an atom-economical way functional C10 olefins footprint. Despite existence variety metathesis catalysts for latter process, there lack readily available, efficient, and inexpensive catalytic systems based on earth-abundant metals (Mo, W) whose preparation does not require sophisticated syntheses manipulations. Here, systematic exploration homogeneous heterogeneous inorganic Mo, W (oxy)halides shows that MoOCl4, while inactive species, forms active selective silica-supported precatalysts able reach equilibrium conversion within few minutes upon activation SnMe4. Such MoOCl4-based were easily accessed through mechanochemical solvent-free procedures found contain, characterization by elemental analysis Raman spectroscopy, isolated (≡SiO)Mo(═O)Cl3 units or polymeric [–O(≡SiO)nMoCl4–nO–]m (n = 1, 2) complexes depending molybdenum loading. former species exhibited higher performance. developed could be applied various substrates, including polyunsaturated industrial ester (FAME) mixtures from palm oil transesterification.
Язык: Английский
Процитировано
3
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
Materials Today Sustainability, Год журнала: 2025, Номер unknown, С. 101117 - 101117
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
ChemistrySelect, Год журнала: 2025, Номер 10(21)
Опубликована: Июнь 1, 2025
Abstract With the increasing demand for sustainable polymers, monomers sourced solely from renewable resources are in high demand. Hydrogenated δ‐lactone ( HL ), synthesized CO 2 , 1,3‐butadiene, and H is a promising candidate. However, its copolymerization behavior remained unexplored, leaving questions about compatibility with other lactones role copolymer systems. In this study, of various lactones, including glycolide (GA), L‐lactide (L‐LA), ε‐caprolactone (CL), was systematically investigated. Copolymerizations were carried out under different conditions, resulting polyesters characterized by ¹H NMR, ¹ 3 C DOSY GPC, DSC, TGA. CL identified as optimal comonomer which it could copolymerize effectively at room temperature. Three chain segment arrangements poly( ‐ co ‐CL), namely random copolyester (poly( r ‐CL)), A‐B block b A‐B‐A (poly(CL‐ successfully obtained. The thermal stability, glass transition temperature, melting mechanical properties can be modulated adjusting proportion monomers. Poly( 8 ‐CL) has tensile elongation 568% strength 8.0 MPa. These results suggest that an interesting attractive monomer development new polyester materials.
Язык: Английский
Процитировано
0