Facile usage of a MYTHEN 1K with a Huber 5021 diffractometer and angular calibration in<i>operando</i>experiments

Gao, Mei; Gu, Yueliang; Li, Li; Gong, Zhengliang; Gao, Xingyu; Wen, Wen

doi:10.1107/s1600576716008566

Cited by 30 publications

(20 citation statements)

References 15 publications

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“…High-resolution powder diffraction experiments were recorded on Beamline BL14B1 at Shanghai Synchrotron Radiation Facility (SSRF) 48 , 49 (Fig. 4 ).…”

Section: Resultsmentioning

confidence: 99%

Chiral induction in covalent organic frameworks

et al. 2018

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Synthetic control over chirality and function is the crowning achievement for metal-organic frameworks, but the same level of control has not been achieved for covalent organic frameworks (COFs). Here we demonstrate chiral COFs (CCOFs) can be crystallized from achiral organic precursors by chiral catalytic induction. A total of nine two-dimensional CCOFs are solvothermally prepared by imine condensations of the C3-symmetric 1,3,5-triformylphloroglucinol (Tp) with diamine or triamine linkers in the presence of catalytic amount of (R)- or (S)-1-phenylethylamine. Homochirality of these CCOFs results from chiral catalyst-induced immobilization of threefold-symmetric tris(N-salicylideneamine) cores with a propeller-like conformation of one single handedness during crystallization. The CCOF-TpTab showed high enantioselectivity toward chiral carbohydrates in fluorescence quenching and, after postsynthetic modification of enaminone groups located in chiral channels with Cu(II) ions, it can also be utilized as a heterogeneous catalyst for the asymmetric Henry reaction of nitroalkane with aldehydes.

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“…High-resolution powder diffraction experiments were recorded on Beamline BL14B1 at Shanghai Synchrotron Radiation Facility (SSRF) 48 , 49 (Fig. 4 ).…”

Section: Resultsmentioning

confidence: 99%

Chiral induction in covalent organic frameworks

et al. 2018

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“…The wavelength of the X-ray was calibrated using LaB 6 standard from NIST (660b). The diffraction peaks’ FWHM of standard LaB 6 is less than 0.02° 52 . The lattice parameters were calculated according to Bragg equation …”

Section: Methodsmentioning

confidence: 93%

Engineering Na+-layer spacings to stabilize Mn-based layered cathodes for sodium-ion batteries

et al. 2021

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Layered transition metal oxides are the most important cathode materials for Li/Na/K ion batteries. Suppressing undesirable phase transformations during charge-discharge processes is a critical and fundamental challenge towards the rational design of high-performance layered oxide cathodes. Here we report a shale-like NaxMnO2 (S-NMO) electrode that is derived from a simple but effective water-mediated strategy. This strategy expands the Na+ layer spacings of P2-type Na0.67MnO2 and transforms the particles into accordion-like morphology. Therefore, the S-NMO electrode exhibits improved Na+ mobility and near-zero-strain property during charge-discharge processes, which leads to outstanding rate capability (100 mAh g−1 at the operation time of 6 min) and cycling stability (>3000 cycles). In addition, the water-mediated strategy is feasible to other layered sodium oxides and the obtained S-NMO electrode has an excellent tolerance to humidity. This work demonstrates that engineering the spacings of alkali-metal layer is an effective strategy to stabilize the structure of layered transition metal oxides.

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“…The detailed information about beamline BL14B1 can be found in refs. 47 , 48 . Data collected on Rigaku Smartlab, a 9-KW lab-based diffractometer was operated at 45 kV, 200 mA using Cu K α ( λ = 1.5406 Å) with a scan speed of 1°/min and a step size of 0.01° in 2 θ at ambient temperature and pressure.…”

Section: Methodsmentioning

confidence: 99%

Metal-organic frameworks for precise inclusion of single-stranded DNA and transfection in immune cells

et al. 2018

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Effective transfection of genetic molecules such as DNA usually relies on vectors that can reversibly uptake and release these molecules, and protect them from digestion by nuclease. Non-viral vectors meeting these requirements are rare due to the lack of specific interactions with DNA. Here, we design a series of four isoreticular metal-organic frameworks (Ni-IRMOF-74-II to -V) with progressively tuned pore size from 2.2 to 4.2 nm to precisely include single-stranded DNA (ssDNA, 11–53 nt), and to achieve reversible interaction between MOFs and ssDNA. The entire nucleic acid chain is completely confined inside the pores providing excellent protection, and the geometric distribution of the confined ssDNA is visualized by X-ray diffraction. Two MOFs in this series exhibit excellent transfection efficiency in mammalian immune cells, 92% in the primary mouse immune cells (CD4+ T cell) and 30% in human immune cells (THP-1 cell), unrivaled by the commercialized agents (Lipo and Neofect).

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Facile usage of a MYTHEN 1K with a Huber 5021 diffractometer and angular calibration inoperandoexperiments

Cited by 30 publications

References 15 publications

Chiral induction in covalent organic frameworks

Chiral induction in covalent organic frameworks

Engineering Na+-layer spacings to stabilize Mn-based layered cathodes for sodium-ion batteries

Metal-organic frameworks for precise inclusion of single-stranded DNA and transfection in immune cells

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