Atmospherical oxidative coupling of amines by UiO-66-NH2 photocatalysis under milder reaction conditions

Liu, Ruxue; Meng, Shuangyan; Ma, Yue; Niu, Litong; He, Shuanghong; Xu, Xueqing; Su, Bitao; Lu, Dedai; Yang, Zhiwang; Lei, Ziqiang

doi:10.1016/j.catcom.2019.03.011

Cited by 42 publications

(18 citation statements)

References 31 publications

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“…The XPS survey spectrum, as shown in Figure A, demonstrated the difference between yeast and yeast@UiO-66-NH 2 composites was that the Zr element only existed in the latter. In the yeast@UiO-66-NH 2 composites, the Zr 3d 5/2 and Zr 3d 3/2 are observed at around 182.57 and 185.02 eV in high-resolution XPS spectrum of Zr 3d (Figure B), respectively, indicating the existence of Zr 4+ . , The peaks at 182.57 and 185.02 eV were assigned to the Zr–O, and Zr–N bond, respectively. This is similar to the results reported in the literature to the formation of ZrO 2 and ZrN. , Figure C is the high-resolution XPS spectrum of C 1s, the peaks at 284.33 eV, 285.64 eV, and 287.20 eV are assigned to the C–C or C–H, carboxylate carbon (OCO) and carbonyl carbon (CO) bonds of the yeast cell wall functional groups.…”

Section: Resultssupporting

confidence: 89%

“…In the yeast@UiO-66-NH 2 composites, the Zr 3d 5/2 and Zr 3d 3/2 are observed at around 182.57 and 185.02 eV in high-resolution XPS spectrum of Zr 3d (Figure 3B), respectively, indicating the existence of Zr 4+ . 51,52 The peaks at 182.57 and 185.02 eV were assigned to the Zr−O, and Zr−N bond, respectively. This is similar to the results reported in the literature to the formation of ZrO 2 and ZrN.…”

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confidence: 99%

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Microorganism@UiO-66-NH₂ Composites for the Detection of Multiple Colorectal Cancer-Related microRNAs with Flow Cytometry

et al. 2020

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High-throughput analyses of multitarget markers can facilitate rapid and accurate clinical diagnosis. Suspension array assays, a flow cytometry-based analysis technology, are among some of the most promising multicomponent analysis methods for clinical diagnostics and research purposes. These assays are appropriate for examining low-volume, complex samples having trace amounts of analytes due to superior elimination of background. Physical shape is an important and promising code system, which uses a set of visually distinct patterns to identify different assay particles. Here, we presented a morphology recognizable suspension arrays based on the microorganisms with different morphologies. In this study, UiO-66-NH2 (UiO stands for University of Oslo) metal–organic frameworks (MOFs), was wrapped on the microorganism surface to form an innovative class of microorganism@UiO-66-NH2 composites for suspension array assays. The use of microorganisms endowed composites barcoding ability with their different morphology and size. Meanwhile, the UiO-66-NH2 provided a stable rigid shell, large specific surface area, and metal(IV) ions with multiple binding sites, which could simplify the protein immobilization procedure and enhance detection sensitivity. With this method, simultaneous detection of three colorectal cancer-related microRNA (miRNA), including miRNA-21, miRNA-17, and miRNA-182, could be easily achieved with femtomolar sensitivity by using a commercial flow cytometer. The synergy between microorganisms and MOFs make the composites a prospective barcoding candidate with excellent characteristics for multicomponent analysis, offering great potential for the development of high throughput and accurate diagnostics.

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Section: Resultssupporting

confidence: 89%

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confidence: 99%

Microorganism@UiO-66-NH₂ Composites for the Detection of Multiple Colorectal Cancer-Related microRNAs with Flow Cytometry

et al. 2020

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“…This intermediate could form benzaldimine by removing the H 2 O 2 molecule. Meanwhile, H 2 O 2 also acts as an additional oxidant to further oxidize carbon-centered radicals to generate benzaldimines. , Finally, the benzaldimine molecule and additional benzylamine undergo an addition reaction to obtain the desired imine product.…”

Section: Resultsmentioning

confidence: 99%

Visible-Light-Induced Selective Oxidation of Amines into Imines over UiO-66-NH₂@Au@COF Core–Shell Photocatalysts

Zhang

et al. 2021

ACS Sustainable Chem. Eng.

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Efficient and stable photocatalysts for selective oxidative coupling of amines to imines are crucial to the conversion of sustainable solar energy to value-added chemical energy. In this work, UiO-66-NH 2 @ Au@COF core−shell nanocomposites with intercalated Au nanoparticles between the UiO-66-NH 2 core and the covalent-organic framework (COF) shell have been demonstrated to exhibit enhanced activity and stability for visible-light-driven aerobic selective oxidation of amines to imines. With optimized Au and two-dimensional π-conjugated COF content, the obtained UiO-66-NH 2 @Au 0.5 @COF1 photocatalyst exhibited the highest conversion of benzylamine with an imine yield of 66.9% for at least five cycles. It is revealed that the introduction of appropriate Au and COF could not only broaden the visible-light absorption band but also promote the separation of photoinduced charge carriers and enhance the photocatalytic performance. Furthermore, a rational mechanism was explored to elucidate the process of photocatalytic reaction. The intercalated Au nanoparticles with the localized surface plasmon resonance (LSPR) effect act as generators of hot electrons and also transfer channels for the photo-generated electrons from the COF shell to the UiO-66-NH 2 core. Importantly, the MOF@metal@COF photocatalysts might provide a promising strategy to construct photocatalysts with desirable activity and stability under visible-light illumination.

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“…Overall, the observed byproducts are the same, regardless of the mechanism. Some research has even reached the anaerobic version (Scheme 9, bottom), where protons act as oxidants, generating hydrogen as byproduct [105]. As a result of this electron transfer, electron holes are generated, which also trigger the formation of the amine radical cation transient species.…”

Section: Oxidative Couplingmentioning

confidence: 99%

“…Otherwise, a ligand functionalization protocol of UiO-66 allowed the obtaining of different UiO-66-NH 2 MOFs, that enabled the isolation of the corresponding imine products under both aerobic and anaerobic conditions. [105]. There are also two recent examples of hybrid structures of MOFs capable of performing this organic transformation.…”

Section: Oxidative Couplingmentioning

confidence: 99%

Metal–Organic Frameworks (MOFs) and Covalent Organic Frameworks (COFs) Applied to Photocatalytic Organic Transformations

et al. 2020

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Among the different alternatives for catalysis using metal–organic frameworks (MOFs) or covalent organic frameworks (COFs), photocatalysis has remarkably evolved during the last decade. Photocatalytic reticular materials allowed recyclability and easy separation of catalyst from the product, also reaching the activity and selectivity commonly observed for molecular systems. Recently, photocatalytic MOFs and COFs have been applied to synthetic applications in order to obtain organic molecules of different complexity. However, although a good number of works have been devoted to this issue, an updated comprehensive revision on this field is still needed. The aim of this review was to fill this gap covering the following three general aspects: (1) common strategies on the design of reticular photocatalytic materials, (2) a comprehensive discussion of the photocatalytic organic reactions achieved by the use of COFs and MOFs, and (3) some critical considerations highlighting directions that should be considered in order to make advances in the study of photocatalytic COFs and MOFs.

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Atmospherical oxidative coupling of amines by UiO-66-NH2 photocatalysis under milder reaction conditions

Cited by 42 publications

References 31 publications

Microorganism@UiO-66-NH₂ Composites for the Detection of Multiple Colorectal Cancer-Related microRNAs with Flow Cytometry

Microorganism@UiO-66-NH₂ Composites for the Detection of Multiple Colorectal Cancer-Related microRNAs with Flow Cytometry

Visible-Light-Induced Selective Oxidation of Amines into Imines over UiO-66-NH₂@Au@COF Core–Shell Photocatalysts

Metal–Organic Frameworks (MOFs) and Covalent Organic Frameworks (COFs) Applied to Photocatalytic Organic Transformations

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Atmospherical oxidative coupling of amines by UiO-66-NH2 photocatalysis under milder reaction conditions

Cited by 42 publications

References 31 publications

Microorganism@UiO-66-NH2 Composites for the Detection of Multiple Colorectal Cancer-Related microRNAs with Flow Cytometry

Microorganism@UiO-66-NH2 Composites for the Detection of Multiple Colorectal Cancer-Related microRNAs with Flow Cytometry

Visible-Light-Induced Selective Oxidation of Amines into Imines over UiO-66-NH2@Au@COF Core–Shell Photocatalysts

Metal–Organic Frameworks (MOFs) and Covalent Organic Frameworks (COFs) Applied to Photocatalytic Organic Transformations

Contact Info

Product

Resources

About

Microorganism@UiO-66-NH₂ Composites for the Detection of Multiple Colorectal Cancer-Related microRNAs with Flow Cytometry

Microorganism@UiO-66-NH₂ Composites for the Detection of Multiple Colorectal Cancer-Related microRNAs with Flow Cytometry

Visible-Light-Induced Selective Oxidation of Amines into Imines over UiO-66-NH₂@Au@COF Core–Shell Photocatalysts