Submicrosticks versus Submicrohelices by Sonication – Assembly of PdCl<sub>2</sub> Nanoparticles on Those Morphologies

Noh, Tae Hwan; Kim, Shin A; Lee, Su Yeon; Jung, Ok‐Sang

doi:10.1002/ejic.200900698

Cited by 5 publications

(3 citation statements)

References 36 publications

(22 reference statements)

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“…The BTTP4 ligand was prepared in an alternative method reported previously. [25] The stirred mixture of 4-picolinic acid (3.0 g, 24 mmol) and freshly distilled thionyl chloride (10 mL) was heated to reflux for 4 h. An excess amount of thionyl chloride was removed by distillation under reduced pressure, and the resulting crystalline powder of 4-picolinoyl chloride was used as prepared. A solution of 1,3,5-trihydroxybenzene (0.93 g, 7.5 mmol) and distilled triethylamine (8 mL) in dry THF (30 mL) was added dropwise to a solution of the above-prepared 4-picolinoyl chloride in THF (20 mL) in an ice bath.…”

Section: Methodsmentioning

confidence: 99%

Two Robust Porous Metal–Organic Frameworks Sustained by Distinct Catenation: Selective Gas Sorption and Single‐Crystal‐to‐Single‐Crystal Guest Exchange

Yang

Xiong

et al. 2010

Chemistry An Asian Journal

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Assembly of copper(I) halide with a new tripodal ligand, benzene-1,3,5-triyl triisonicotinate (BTTP4), afforded two porous metal-organic frameworks, [Cu(2)I(2)(BTTP4)]⊃2CH(3)CN (1·2CH(3)CN) and [CuBr(BTTP4)]⊃(CH(3)CN·CHCl(3)·H(2)O) (2·solvents), which have been characterized by IR spectroscopy, thermogravimetry (TG), single-crystal, and powder X-ray diffraction (PXRD) methods. Compound 1 is a polycatenated 3D framework that consists of 2D (6,3) networks through inclined catenation, whereas 2 is a doubly interpenetrated 3D framework possessing the ThSi(2)-type (ths) (10,3)-b topology. Both frameworks contain 1D channels of effective sizes 9×12 and 10×10 Å(2), which amounts to 43 and 40% space volume accessible for solvent molecules, respectively. The TG and variable-temperature PXRD studies indicated that the frameworks can be completely evacuated while retaining the permanent porosity, which was further verified by measurement of the desolvated complex [Cu(2)I(2)(BTTP4)] (1'). The subsequent guest-exchange study on the solvent-free framework revealed that various solvent molecules can be adsorbed through a single-crystal-to-single-crystal manner, thus giving rise to the guest-captured structures [Cu(2)I(2)(BTTP4)]⊃C(6)H(6) (1·benzene), [Cu(2)I(2)(BTTP4)]⊃2C(7)H(8) (1·2 toluene), and [Cu(2)I(2)(BTTP4)]⊃2C(8)H(10) (1·2 ethylbenzene). The gas-adsorption investigation disclosed that two kinds of frameworks exhibited comparable CO(2) storage capacity (86-111 mL g(-1) at 1 atm) but nearly none for N(2) and H(2), thereby implying its separation ability of CO(2) over N(2) and H(2). The vapor-adsorption study revealed the preferential inclusion of aromatic guests over nonaromatic solvents by the empty framework, which is indicative of selectivity toward benzene over cyclohexane.

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Section: Methodsmentioning

confidence: 99%

Two Robust Porous Metal–Organic Frameworks Sustained by Distinct Catenation: Selective Gas Sorption and Single‐Crystal‐to‐Single‐Crystal Guest Exchange

Yang

Xiong

et al. 2010

Chemistry An Asian Journal

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“…The benzene-1,3,5-triyl triisonicotinate (BTI) used in this work was synthesized according to previous reported procedure [59]. FTIR (KBr, cm −1 ): 3097 (C-H stretching vibration), 1726 (C = O stretching), 1602, 1503, 1406 (skeleton vibration in aromatic ring), 1259 (C-N stretching), 1134 (C-H in-plane bending vibration), 675 (C-H out-plane bending vibration).…”

Section: Synthesis Of Benzene-135-triyl Triisonicotinatementioning

confidence: 99%

Star-shaped supramolecular ionic liquid crystals based on pyridinium salts

et al. 2018

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Series of novel star-shaped liquid crystals containing [1,1ʹ-biphenyl]-4,4ʹ-diyl diisonicotinate mesogens with various counterions (Br − , B-SO 3 − ,C-SO 3 − ,H 2 PO 4 − , BF 4 − ) have been synthesized and characterized, which display a nematic phase. The molecular structures of the liquid crystals, thereof consisting of rod-like mesogens linked together by different long alkyl spacers to a small disc-like core of central benzene-1,3,5-triyl triisonicotinate, have been fully characterized by 1 H NMR. Their thermal and supramolecular organization behaviours have been studied by combining polarized optical microscopy, differential scanning calorimetry and small-angle X-ray scattering. These investigations showed that the mesophase temperature range increased with increasing alkyl chain length and the clearing point decreased with increase of anion size. These star-shaped liquid crystals have a long and ordered molecular structure, the electron delocalization of the π-π stacking conjugation effect and the electrostatic attraction of ionic make them have good ferroelectric properties and ionic conductivity properties. The interest in preparing ionic liquid crystal with a nematic phase lies in the technological applications as it is well known that the nematic phase has the highest fluidity of all liquid crystalline phases and hence the possibility to align it by applying an external electric/magnetic field, commonly used in electro-optical devices.

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“…[1][2][3][4][5][6][7][8] The convenient production of stable and efficient nanocatalysts for energy conservation, chemical production, and pollution-control purposes, for example, is a recent breakthrough in catalysis research.…”

Section: Introductionmentioning

confidence: 99%

Submicrospheres as Both a Template and the Catalyst Source. Silica Submicro-reactor Dotted with Palladium Nanoparticles as Catalysts

Kim¹,

Noh²,

Jung³

2013

Bulletin of the Korean Chemical Society

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), has been carried out without any templates or additives. The submicrospheres were coated with silicates, and then calcined in air at 550 °C for 1 h, to efficiently form hollow-spherical SiO 2 submicro-reactors dotted with palladium(0) nanoparticles (PdNPs). That is, the submicrospheres act as both a template and a source of the palladium metal nanoparticles. The submicro-reactors containing nano-catalysts have been characterized by means of SEM, TEM, and XPS. Notably, the reactors were proved to be very effective for Suzuki-Miyaura cross-coupling and hydrogenation reactions.

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Submicrosticks versus Submicrohelices by Sonication – Assembly of PdCl₂ Nanoparticles on Those Morphologies

Cited by 5 publications

References 36 publications

Two Robust Porous Metal–Organic Frameworks Sustained by Distinct Catenation: Selective Gas Sorption and Single‐Crystal‐to‐Single‐Crystal Guest Exchange

Two Robust Porous Metal–Organic Frameworks Sustained by Distinct Catenation: Selective Gas Sorption and Single‐Crystal‐to‐Single‐Crystal Guest Exchange

Star-shaped supramolecular ionic liquid crystals based on pyridinium salts

Submicrospheres as Both a Template and the Catalyst Source. Silica Submicro-reactor Dotted with Palladium Nanoparticles as Catalysts

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Submicrosticks versus Submicrohelices by Sonication – Assembly of PdCl2 Nanoparticles on Those Morphologies

Cited by 5 publications

References 36 publications

Two Robust Porous Metal–Organic Frameworks Sustained by Distinct Catenation: Selective Gas Sorption and Single‐Crystal‐to‐Single‐Crystal Guest Exchange

Two Robust Porous Metal–Organic Frameworks Sustained by Distinct Catenation: Selective Gas Sorption and Single‐Crystal‐to‐Single‐Crystal Guest Exchange

Star-shaped supramolecular ionic liquid crystals based on pyridinium salts

Submicrospheres as Both a Template and the Catalyst Source. Silica Submicro-reactor Dotted with Palladium Nanoparticles as Catalysts

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Product

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About

Submicrosticks versus Submicrohelices by Sonication – Assembly of PdCl₂ Nanoparticles on Those Morphologies