A Porous Flexible Homochiral SrSi<sub>2</sub> Array of Single‐Stranded Helical Nanotubes Exhibiting Single‐Crystal‐to‐Single‐Crystal Oxidation Transformation

Huang, Yiding; Mu, Bin; Schoenecker, Paul M.; Carson, Cantwell G.; Karra, Jagadeswara R.; Cai, Yang; Walton, Krista S.

doi:10.1002/anie.201004921

Cited by 68 publications

(30 citation statements)

References 42 publications

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“…Observation of the Na 1s,C u2p 3/2 ,a nd O1sp eaks in the XPS spectra revealed that the coordination mode of carboxyl groups was the same in 1 duringe xchange processes, whichs uggested that cation-exchange occurred in the guest molecule. [42][43][44] Moreover,P XRD analysis indicated that there weren os ignificant changes between the simulated, synthesized, andc ation-exchanged patterns;t hus proving that the cation-exchanged framework had the same structure as that of 1 ( Figure S2 di nt he Supporting Information). Therefore, given thec harge-balance consideration, the pillared MOF of 1 was an anionic framework filled with one [H 3 O] + ion per formula unit.…”

Section: Resultsmentioning

confidence: 88%

“…Furthermore, XPS measurements of blue crystals of 1 provided evidencet hat the observation of the Cu 2p 3/2 peak at 934.68eVw as in good agreement with Cu II cations (Figure 1b). [42,43] In addition to the XPS spectrum, powder X-ray diffraction (PXRD) analysiso ft he as-prepared crystalline sample revealed that the sample was pure (Figure S1 bi nt he Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 2b,y ellowgreen 2 hadaCu 2p 3/2 peak at 934.5 eV in the XPS spectrum,w hich suggested that only Cu II existed in 2. [42][43][44] Furthermore,S CXRD analysiso ft he yellowgreen crystals indicated the formation of 2 with a distinctive 2D stair-stepping framework (Figure 2c). It was noteworthy that the 3D hierarchical anion-pillared framework of 1 could undergo as pontaneous dissolution-exchange-crystallization process to form 2D stairsteppings tructure.…”

Section: Dissolution-recrystallization Structural Transformation Behamentioning

confidence: 95%

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Reversible Structural Transformations of Metal–Organic Frameworks as Artificial Switchable Catalysts for Dynamic Control of Selectively Cyanation Reaction

Huang

Zhang

et al. 2019

Chemistry A European J

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Thes ynthesis of molecular-level artificial switchable catalysts, of which activity in different chemical processes can be switchedb yc ontrolling different stimuli, has provided an ew paradigm to perform mechanical tasks and measurable work. In this work, to obtain highly effective and regioselective artificials witchable catalysts, ah ierarchical anion-pillaredf ramework {(H 3 O)[Cu(CPCDC)(4,4'-bpy)]} n (1; H 3 CPCDC = 9-(4-carboxyphenyl)-9H-carbazole-3,6-dicarboxylic acid, 4,4'-bpy = 4,4'-bipyridine),i ncluding free [H 3 O] + ions as guest molecules, was constructed. Upon dissolve-exchangecrystallization behavior,f ascinating reversible structural transformationsp roceeded between anion framework 1 and neutral 2D stair-stepping framework {[Cu(CPCDC)(4,4'-bpe)]} n (2;4 ,4'-bpe = 4,4'-vinylenedipyridine). Moreover,f rameworks 1 and 2 can act as heterogeneousa rtificial switchable catalysts to selectively promotet he direct cyanation reactiono f terminal alkynes and azobisisobutyronitrile. The results indicated that 1 and 2 exhibited excellent selectivity to generate vinyl isobutyronitrile skeletons or propiolonitrile frameworks, respectively,a su nique products.F urthermore, indicating paper,G C-MS, energy-dispersive X-ray spectroscopy,a nd Xray photoelectrons pectroscopy analysis demonstrated that the reversible structural transformations endowed 1 and 2 with well-definedp latforms to stabilize the isobutyronitrile and CN sources through the different catalytic pathways.[a] Dr.

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Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Dissolution-recrystallization Structural Transformation Behamentioning

confidence: 95%

See 1 more Smart Citation

Reversible Structural Transformations of Metal–Organic Frameworks as Artificial Switchable Catalysts for Dynamic Control of Selectively Cyanation Reaction

Huang

Zhang

et al. 2019

Chemistry A European J

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“…[1][2][3][4] In the past decade, there has been great success in developing the effective synthesis methods for the fabrication of nanotubes. [8][9][10][11] Recently, researchers worldwide have concentrated rapidly increasing efforts on the rational design and synthesis of complex nanotubes. [8][9][10][11] Recently, researchers worldwide have concentrated rapidly increasing efforts on the rational design and synthesis of complex nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Ni@NiO core–shell nanoparticle tube arrays with enhanced supercapacitor performance

Liang

et al. 2015

J. Mater. Chem. A

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Nanotube arrays have shown great potentials in a variety of important applications, such as energy storage.To enhance the inherent properties and endow nanotubes with multifunctionality, the rational design of nanotube arrays with higher complexity in terms of structure and composition are highly desired and still remains a great challenge. In this work, the Ni@NiO core-shell nanoparticle tube arrays (CSNPTAs) were designed and fabricated via an efficient, low-cost and environmental friendly ZnO nanorods templateassisted electrodeposition method, and they are effective in enhancing ion diffusion and surface area as well as preventing nanoparticle agglomeration because of the unique array structures, hollow structures, and core-shell nanoparticle structures. As electrodes, the Ni@NiO CSNPTAs show high electrochemical performance such as high specific capacitance (C sp ), superior rate capability, and excellent cycle stability and exhibit promising applications for high-performance supercapacitors (SCs).transmission of electroactive species because of the porous structures, core-shell structures, nanotube structures and high order arrays, and they show promising utilization in the energy storage systems. [31][32][33][34][35] Hence, it is expected that more diverse functional properties can be introduced into NiO by designing Ni@NiO CSNPTAs. In this study, we present the rational design and fabrication of Ni@NiO CSNPTAs and the promising applications for high-performance supercapacitors (SCs). Results and DiscussionThe schematic illustration of the procedures used to fabricate Ni@NiO CSNPTAs is shown in Scheme 1. After the fabrication of ZnO nanorod arrays (NRAs), Ni nanoparticle layers were electrodeposited on the surfaces of ZnO NRAs to form ZnO@Ni NRAs. Ni nanoparticle tube arrays (NPTAs) were then fabricated by dissolving ZnO templates from the ZnO@Ni NRAs in 3% NH 3 ·H 2 O solution. Finally, the Ni@NiO CSNPTAs were successfully fabricated via the partial oxidation of Ni NPTAs by heat treatment in air. The details of the fabrication procedures of Ni@NiO CSNPTAs are described in the experimental section. SEM images of ZnO NRAs are shown in Figure 1a-b, which shows hexagonal ZnO nanorods were fabricated. The diameters of ZnO nanorods are 300~400 nm, and the lengths are ~2.0 µm. SEM images of the ZnO@Ni NRAs are shown in Figure 1c-d, which shows ZnO nanorods have uniform Ni nanoparticle wraps. After dissolving ZnO, the Ni NPTAs were fabricated and their SEM images with different magnifications are shown in Figure 1e-f, which shows Ni NPTAs have porous structures and are composed of nanoparticles. SEM image of a broken Ni nanotube is shown in inset in Figure 1f, which shows hollow nanotube structure. TEM image of a typical Ni nanotube is shown in Figure 1g, which further proves the hollow tube structures are composed of nanoparticles. The diameters of Ni nanotubes are 500~600 nm and wall thicknesses are ~100 nm. The lengths of Ni nanotubes are ~2.0 µm. The results of HRTEM and SAED in Figure 1h show that the Ni nano...

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“…Examples of d 10 coordination polymers have been reported to undergo transformation caused by external stimuli such as light, thermal and other factors [12]. For these coordination polymers, although the conversion processes accompany the breaking of bonds, alteration of oxygen state or loss of guest molecules, crystalline states are retained [13].…”

Section: Introductionmentioning

confidence: 99%

Two supramolecular isomers with different structural features: reversible transformation and fluorescence properties

Wang

Zhang

2013

Journal of Coordination Chemistry

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Two supramolecular isomers, {[Cd 2 (pda) 2 (1,10′-phen) 2 ]·H 2 O} n (1) and {[Cd 2 (pda) 2 (1,10′-phen) 2 ]·4-H 2 O} n (2) (1,10′-phen = 1,10-phenanthroline, pda = phenylenediacrylate dianion), have been synthesized and characterized by single-crystal X-ray analysis. Complex 1 exhibits a 3D network constructed from 1D rod-shaped secondary building units, while 2 shows a 3D, twofold interpenetrated framework. There exists a reversible transformation between the pair of isomers: when yellow block crystals of 1 are treated under microwave irradiation, colorless plate crystals of 2 are formed; in turn, if crystals of 2 are dissolved in water and left undisturbed about two weeks at room temperature, crystals of 1 reappear. Fluorescence properties of 1 and 2 have also been studied.

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A Porous Flexible Homochiral SrSi₂ Array of Single‐Stranded Helical Nanotubes Exhibiting Single‐Crystal‐to‐Single‐Crystal Oxidation Transformation

Cited by 68 publications

References 42 publications

Reversible Structural Transformations of Metal–Organic Frameworks as Artificial Switchable Catalysts for Dynamic Control of Selectively Cyanation Reaction

Reversible Structural Transformations of Metal–Organic Frameworks as Artificial Switchable Catalysts for Dynamic Control of Selectively Cyanation Reaction

Ni@NiO core–shell nanoparticle tube arrays with enhanced supercapacitor performance

Two supramolecular isomers with different structural features: reversible transformation and fluorescence properties

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A Porous Flexible Homochiral SrSi2 Array of Single‐Stranded Helical Nanotubes Exhibiting Single‐Crystal‐to‐Single‐Crystal Oxidation Transformation

Cited by 68 publications

References 42 publications

Reversible Structural Transformations of Metal–Organic Frameworks as Artificial Switchable Catalysts for Dynamic Control of Selectively Cyanation Reaction

Reversible Structural Transformations of Metal–Organic Frameworks as Artificial Switchable Catalysts for Dynamic Control of Selectively Cyanation Reaction

Ni@NiO core–shell nanoparticle tube arrays with enhanced supercapacitor performance

Two supramolecular isomers with different structural features: reversible transformation and fluorescence properties

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A Porous Flexible Homochiral SrSi₂ Array of Single‐Stranded Helical Nanotubes Exhibiting Single‐Crystal‐to‐Single‐Crystal Oxidation Transformation