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  • Royal Society of Chemistry (RSC)  (135)
  • 2020-2024  (135)
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  • Royal Society of Chemistry (RSC)  (135)
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  • 2020-2024  (135)
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  • 11
    Online Resource
    Online Resource
    Engineering cellulose into water soluble poly(protic ionic liquid) electrolytes in the DBU/CO 2 /DMSO solvent system as an organocatalyst for the Knoevenagel condensation reaction
    Royal Society of Chemistry (RSC) ; 2021
    In:  Green Chemistry Vol. 23, No. 24 ( 2021), p. 9922-9934
    Details
    In: Green Chemistry, Royal Society of Chemistry (RSC), Vol. 23, No. 24 ( 2021), p. 9922-9934
    Abstract: The facile design and preparation of polyelectrolytes is a frontier topic in the fields of polymer science, energy storage devices and catalysis. Herein, linear water soluble cellulosic poly(protic ionic liquid) (CPIL) electrolytes were facilely and atom economically prepared after the dissolution of cellulose in the newly developed DBU/CO 2 /DMSO solvent system, followed by the simple addition of succinic anhydride under mild conditions. The DBU not only participated in the dissolution of cellulose as a solvent component, but also acted as an organocatalyst for the acylation reaction of cellulose with succinic anhydride, as well as a cation component in the targeted CPIL electrolytes. The reaction was optimized, and the effect of the reaction conditions on the chemical and physical properties of the CPILs was investigated. And then, as a proof of concept, the CPIL electrolyte aqueous solution was successfully used as the catalytic reaction media for the Knoevenagel condensation reaction. It was found that the reaction was homogeneous at the beginning, and the products could precipitate out from the media with the proceeding of the reaction, thus affording satisfactory filtration yields ranging from 56.7% to 93.8%. The solution properties of the CPIL aqueous solution were primarily investigated towards an in-depth understanding of the catalytic mechanism, by which a synergetic catalytic mechanism of the CPILs was proposed, and the reaction started with a nucleophilic addition reaction, and was then followed by a fast dehydration reaction. Finally, the direct reusability potential of the CPIL aqueous solution after the product filtration was also primarily investigated for the Knoevenagel condensation reaction.
    Type of Medium: Online Resource
    ISSN: 1463-9262 , 1463-9270
    URL: Article
    DOI: 10.1039/D1GC03148A
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 1485110-6
    detail.hit.zdb_id: 2006274-6
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  • 12
    Online Resource
    Online Resource
    Helically chiral Pd( ii ) complexes containing intramolecular Pd⋯Pd metallophilicity as circularly polarized molecular phosphors
    Royal Society of Chemistry (RSC) ; 2021
    In:  Chemical Communications Vol. 57, No. 13 ( 2021), p. 1627-1630
    Details
    In: Chemical Communications, Royal Society of Chemistry (RSC), Vol. 57, No. 13 ( 2021), p. 1627-1630
    Type of Medium: Online Resource
    ISSN: 1359-7345 , 1364-548X
    URL: Article
    DOI: 10.1039/D0CC08188D
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 1472881-3
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  • 13
    Online Resource
    Online Resource
    A 3D FeOOH nanotube array: an efficient catalyst for ammonia electrosynthesis by nitrite reduction
    Royal Society of Chemistry (RSC) ; 2022
    In:  Chemical Communications Vol. 58, No. 33 ( 2022), p. 5160-5163
    Details
    In: Chemical Communications, Royal Society of Chemistry (RSC), Vol. 58, No. 33 ( 2022), p. 5160-5163
    Abstract: Nitrite (NO 2 − ) is a detrimental pollutant widely existing in groundwater sources, threatening public health. Electrocatalytic NO 2 − reduction settles the demand for removal of NO 2 − and is also promising for generating ammonia (NH 3 ) at room temperature. A nanotube array directly grown on a current collector not only has a large surface area, but also exhibits improved structural stability and accelerated electron transport. Herein, a self-standing FeOOH nanotube array on carbon cloth (FeOOH NTA/CC) is proposed as a highly active electrocatalyst for NO 2 − -to-NH 3 conversion. As a 3D catalyst, the FeOOH NTA/CC is able to attain a surprising faradaic efficiency of 94.7% and a large NH 3 yield of 11937 μg h −1 cm −2 in 0.1 M PBS (pH = 7.0) with 0.1 M NO 2 − . Furthermore, this catalyst also displays excellent durability in cyclic and long-term electrolysis tests.
    Type of Medium: Online Resource
    ISSN: 1359-7345 , 1364-548X
    URL: Article
    DOI: 10.1039/D2CC00611A
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 1472881-3
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  • 14
    Online Resource
    Online Resource
    Recoverable solvent-free small molecular supramolecular pseudoeutectic adhesives with a wide temperature range
    Royal Society of Chemistry (RSC) ; 2023
    In:  Green Chemistry Vol. 25, No. 17 ( 2023), p. 6845-6852
    Details
    In: Green Chemistry, Royal Society of Chemistry (RSC), Vol. 25, No. 17 ( 2023), p. 6845-6852
    Abstract: Traditional petroleum-derived polymer adhesives can no longer meet the current demand for smart adhesion under harsh environmental conditions and sustainable development. The use of toxic solvents or volatile substances in these adhesives has raised significant environmental pollution concerns. Additionally, complex systems count against mechanism study. The structural prerequisites that govern self-assembly in gelators are always not well understood, even in the case of simple gelators. Therefore, there is an urgent need for the development of novel, simple, and solvent-free adhesive formulations suitable for harsh conditions. In this study, we explored a new type of pseudoeutectic hydroxyl-quaternary phosphate adhesive that can demonstrate robust bonding strengths (up to 2.14 MPa at −80 °C) across a broad temperature range (from −80 °C to 80 °C) on various surfaces (glass, steel, and PET). Moreover, this adhesive can be simply recycled from water and retains stable adhesion strength after several recovery cycles. The impact of structural modifications on adhesion was thoroughly investigated through molecular engineering. The results from molecular dynamics simulations corresponded closely to those from lap-shear experiments and shed light on the high interfacial energy observed on the iron surface. Notably, incorporating a small amount of ethylene glycol has been found to enhance durability significantly.
    Type of Medium: Online Resource
    ISSN: 1463-9262 , 1463-9270
    URL: Article
    DOI: 10.1039/D3GC01253K
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
    detail.hit.zdb_id: 1485110-6
    detail.hit.zdb_id: 2006274-6
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  • 15
    Online Resource
    Online Resource
    Catalytic radical cascade cyclization of alkene-tethered enones to fused bicyclic cyclopropanols
    Royal Society of Chemistry (RSC) ; 2021
    In:  Organic Chemistry Frontiers Vol. 8, No. 23 ( 2021), p. 6678-6686
    Details
    In: Organic Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 8, No. 23 ( 2021), p. 6678-6686
    Abstract: An unprecedented hydrogen atom transfer-triggered intramolecular cascade reaction between alkenes and enones is developed, using Fe(acac) 3 , PhSiH 2 (Oi-Pr) and trimethyl borate, to efficiently construct cis -fused bicyclic cyclopropanols, privileged scaffolds often found in natural products. This mild protocol features unique regio- and stereo-selectivity and impressive functional group tolerability. Mechanistic studies reveal that cyclopropane-containing motifs could be generated through a stepwise radical process rather than the Michael addition reaction.
    Type of Medium: Online Resource
    ISSN: 2052-4129
    URL: Article
    DOI: 10.1039/D1QO01312B
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
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  • 16
    Online Resource
    Online Resource
    The metal- and column-free synthesis of pyridin-2-yl ureas carrying cyclic secondary amine substituents and establishing the mechanism of the reactions through a computational study
    Royal Society of Chemistry (RSC) ; 2023
    In:  Organic Chemistry Frontiers Vol. 10, No. 13 ( 2023), p. 3182-3192
    Details
    In: Organic Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 10, No. 13 ( 2023), p. 3182-3192
    Abstract: A protocol for the synthesis of unsymmetrical ureas bearing 2-pyridyl units has been developed, relying on metal- and column-free one-pot ammonolysis by using a wide range of aryl and alkyl amines, resulting in nearly quantitative conversions. The reaction is not hindered by either donor or acceptor groups on secondary amine rings containing sp 2 C, sp 3 C, O, S, and N atoms, as well as diverse functionalities including variant ring strain and chiral substrates, and could be easily scaled up to yield bulk amounts of triazole attaching pyridyl ureas as potential ASK1 inhibitors. Theoretical DFT computational studies were compared to the initial experimental data supporting a plausible mechanism for the process, from which the relative merits of different mechanistic schemes for direct urea formation could be assessed. This reaction initiates through the in situ pyridinolysis of phenyl chloroformate followed by inner molecular rearrangement to phenyl carbamate hydrochloride. On the basis of calculated energies, a pathway involving a concerted mechanism was speculated to be more accessible and may explain how direct aminolysis occurs through benign base catalysis. Such a mechanism is inconsistent with traditional kinetic modelling of zwitterionic intermediates and neutral ortho -pyridinyl isocyanate during the procedure, which is perhaps more likely applicable for similar meta - and para -pyridinyl fragments with intermolecular rearrangements.
    Type of Medium: Online Resource
    ISSN: 2052-4129
    URL: Article
    DOI: 10.1039/D3QO00571B
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
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  • 17
    Online Resource
    Online Resource
    Electrochemical dehydrogenative cyclization/aromatization of aniline-tethered alkylidenecyclopropanes: facile access to benzo[ c ]carbazoles
    Royal Society of Chemistry (RSC) ; 2023
    In:  Organic Chemistry Frontiers Vol. 10, No. 6 ( 2023), p. 1557-1563
    Details
    In: Organic Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 10, No. 6 ( 2023), p. 1557-1563
    Abstract: A novel noble transition metal- and external oxidant-free electrochemical cyclization/aromatization of aniline-tethered alkylidenecyclopropanes enabled by N–H/C–H functionalization is described. Various highly functionalized benzo[ c ]carbazoles were constructed in atom-economical and sustainable manners, and exhibited a broad substrate scope and excellent regioselectivity. In addition, H 2 was the only theoretical byproduct in this protocol. Mechanistic studies indicated that the reaction proceeded through nitrogen-centered radical generation, cleavage of C–C bonds, C(sp 2 )–H functionalization and aromatization cascades.
    Type of Medium: Online Resource
    ISSN: 2052-4129
    URL: Article
    DOI: 10.1039/D2QO02016E
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2023
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  • 18
    Online Resource
    Online Resource
    Synergistic enhanced NH 3 -sensing of SnS via Ti 3 C 2 T x -oriented vertical growth and oxygen-containing functional group regulation
    Royal Society of Chemistry (RSC) ; 2022
    In:  Environmental Science: Nano Vol. 9, No. 5 ( 2022), p. 1805-1818
    Details
    In: Environmental Science: Nano, Royal Society of Chemistry (RSC), Vol. 9, No. 5 ( 2022), p. 1805-1818
    Abstract: Stannous sulfide (SnS) is a promising candidate for gas sensing applications due to its unique two-dimensional (2D) puckered monolayer and response capability at room temperature (25 °C). However, the general stacking of 2D nanoflakes as well as the characteristic of poor conductivity of SnS suppresses its response capability towards rarefied gas detection. Here, we report a nanocomposite of SnS/Ti 3 C 2 T x , featured by the vertically aligned, discrete SnS nanoflakes grown on the surface of Ti 3 C 2 T x . The SnS/Ti 3 C 2 T x nanocomposite with unique loose architecture and modulated conductivity was achieved via a one-step solvothermal process with Ti 3 C 2 T x induction. Further boosting of the sensitivity towards trace NH 3 was realized by functionalizing the surface of SnS with precise alkaline treatment. The oxygen-containing functional groups on the surface of SnS, introduced during alkaline treatment, serve as catalytic medium to activate S atoms for NH 3 adsorption enhancement, which was clarified by first-principles calculations. The obtained nanocomposite achieved a significant promotion of response by 27.5 times that of pure SnS towards 5 ppm NH 3 at 25 °C. It also exhibits a practical capability to sense rarefied NH 3 as low as 250 ppb with a response of 0.453. The accomplishments light a new way for the research of microstructure construction and ultra-low concentration gas detection of black phosphorus-like materials.
    Type of Medium: Online Resource
    ISSN: 2051-8153 , 2051-8161
    URL: Article
    DOI: 10.1039/D2EN00035K
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2758235-8
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  • 19
    Online Resource
    Online Resource
    Suppressing singlet–triplet annihilation processes to achieve highly efficient deep-blue AIE-based OLEDs
    Royal Society of Chemistry (RSC) ; 2022
    In:  Materials Horizons Vol. 9, No. 9 ( 2022), p. 2376-2383
    Details
    In: Materials Horizons, Royal Society of Chemistry (RSC), Vol. 9, No. 9 ( 2022), p. 2376-2383
    Abstract: Aggregation-induced emission (AIE) materials are attractive for the fabrication of high efficiency organic light-emitting diodes (OLEDs) by harnessing “hot excitons” from the high-lying triplet exciton states (T n , n ≥ 2) and high photoluminescence (PL) quantum efficiency in solid films. However, the electroluminescence (EL) efficiency of most AIE-based OLEDs does not meet our expectation due to some unrevealed exciton loss processes. Herein, we further enhance the efficiency of blue AIE-based OLEDs, and find experimentally and theoretically that the serious exciton loss is caused by the quenching of radiative singlet excitons and long-lived triplet excitons [singlet–triplet annihilation (STA)]. In order to suppress the STA process, 1-(2,5-dimethyl-4-(1-pyrenyl)phenyl)pyrene (DMPPP) with triplet-triplet annihilation up-conversion was doped in two AIE emitters to reduce the triplet excitons on the lowest triplet excited state (T 1 ) of AIE molecules. It can be seen that the external quantum efficiency (EQE) of the resulting blue OLEDs was enhanced to 11.8% with CIE coordinates of (0.15, 0.07) and a negligible efficiency roll-off, realizing the efficiency breakthrough of deep-blue AIE-based OLEDs. This work establishes a physical insight in revealing the exciton loss processes and the fabrication of high-performance AIE-based OLEDs.
    Type of Medium: Online Resource
    ISSN: 2051-6347 , 2051-6355
    URL: Article
    DOI: 10.1039/D2MH00627H
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2744250-0
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  • 20
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    Online Resource
    Light-responsive hyaluronic acid nanomicelles co-loaded with an IDO inhibitor focus targeted photoimmunotherapy against “immune cold” cancer
    Royal Society of Chemistry (RSC) ; 2021
    In:  Biomaterials Science Vol. 9, No. 23 ( 2021), p. 8019-8031
    Details
    In: Biomaterials Science, Royal Society of Chemistry (RSC), Vol. 9, No. 23 ( 2021), p. 8019-8031
    Abstract: Nanomedicine enabled cancer combination immunotherapy not only sufficiently activates the host immune system, but also reprograms the immunosuppressive microenvironment, representing a new generation approach to treat cancer. Herein, we demonstrated a targeted photo- and immune-active nanoplatform termed NLG919@HA-Ce6 to simultaneously elicit efficient immunogenic cell death (ICD) using the photosensitizer Ce6 and modulate the tryptophan metabolic pathway using an indoleamine 2,3-dioxygenase (IDO) inhibitor NLG919 for the combined photodynamic therapy (PDT) and checkpoint blockade immunotherapy. Against the triple-negative and poorly immunogenic 4T1 breast cancer model, the stable spherical nanomicelle NLG919@HA-Ce6 selectively killed tumour cells via the toxic singlet oxygen upon laser excitation, thus in situ triggering a potent antitumor immune response, as seen via the obvious CRT exposure, ATP release, dendritic cell maturation, etc . Meanwhile, the IDO1-mediated immunosuppression was effectively reprogrammed to an immunostimulatory phenotype, which was accompanied by an enhanced cytotoxic T cell response as well as reduced Treg infiltration in tumour bed. Ultimately, the 4T1 tumour was synergistically suppressed by NLG919@HA-Ce6 due to the outcome of focused PDT, obvious ICD post PDT and IDO1 blockade. This study suggests the promise of NLG919@HA-Ce6 as an alternative simple, stimulative and targeted nanoagent to enable the whole-body photo-immune therapy against “immune cold” cancer.
    Type of Medium: Online Resource
    ISSN: 2047-4830 , 2047-4849
    URL: Article
    DOI: 10.1039/D1BM01409A
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 2693928-9
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