Preparation of Rh‐containing cellulose acetate films and the chemistry of Rh in cellulose acetate

Park, Kwang‐Min; Shim, Il-Wun

doi:10.1002/app.1991.070420519

Cited by 10 publications

(3 citation statements)

References 25 publications

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“…T g of Ru-Containing PC films. As noted above, the oxygen atoms of ester groups of PC are believed to coordinate, at least partially, to Ru metal cations, and consequently, the PC molecules are expected to be cross-linked to a certain degree through such coordinations, leading to an increase in the glass transition temperature ( T g ). − , As expected, the T g of [PC−Ru] films increases as below:…”

Section: Resultsmentioning

confidence: 77%

“…The studies of transition metal-containing polymeric materials have been a research area of current importance because of their versatile applications − as new materials. In these materials, it was well-known that incorporated transition metals gave rise to many useful physical and chemical properties of the polymers. ,, Our recent studies revealed that the metals themselves showed interesting catalytic reactivities under relatively mild conditions. − The most important feature of our research was that the chemical alteration of permeation selectivity of organic polymers could be realized by incorporation of reactive transition metal complexes into them; thus, it was possible to recover essentially pure H 2 gas from a 1:1 mixture of H 2 and CO gases using ruthenium-containing cellulose acetate membranes under ambient conditions . This means that the transition metal-containing polymer films could be used for various gas separations.…”

Section: Introductionmentioning

confidence: 80%

“…As noted above, the oxygen atoms of ester groups of PC are believed to coordinate, a t least partially, to Ru metal cations, and consequently, the PC molecules are expected to be crosslinked to a certain degree through such coordinations, leading to an increase in the glass transition temperature (Tg). 6 several days, there are only two bands at 2080 and 2016 cm-l. The two bands at 2080 and 2016 cm-l, which appear simultaneously upon reaction with CO gas, are quite stable in air or vacuum and are inert to reaction with 0 2 or N2 (600 Torr) a t 140 "C. Also their shapes and band intensity are analogous to those of wellcharacterized ~is-Ru~~I(C0)z species.8,10>22 From the intensity ratio of the two bands (v, 2080, vasym 20161, the CO-Ru-CO angle is calculated to be around 81".…”

Section: Andi Nomentioning

confidence: 98%

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Preparation of Ruthenium-Containing Polycarbonate Films and the Chemistry of Ruthenium in Polycarbonate

Shim

Jeong

et al. 1996

Macromolecules

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RuCl3·3H2O complexes have been incorporated into polycarbonate using solvent. The interactions between Ru complexes and polycarbonate (PC) are examined by infrared spectroscopy and thermal analysis. The reaction chemistries of these Ru-containing films have been investigated by reacting the Ru sites with CO, O2, H2, D2, NO, and C2H4. They show interesting catalytic activities in various gas phase reactions under relatively mild conditions such as NO reduction, hydrogenation of ethylene and benzene, water-gas shift reaction, and oxidation of n-butyl sulfide.

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Section: Resultsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 80%

Section: Andi Nomentioning

confidence: 98%

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Preparation of Ruthenium-Containing Polycarbonate Films and the Chemistry of Ruthenium in Polycarbonate

Shim

Jeong

et al. 1996

Macromolecules

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The chemistry of Pd in cellulose acetate

Hwang

Shim

1992

J of Applied Polymer Sci

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Catalytic hydrogenation and gas permeation properties of metal‐containing poly(phenylene oxide) and polysulfone

Gao

Liao

et al. 1993

J of Applied Polymer Sci

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SYNOPSISMetal-containing polymers, PPO-DPP-Pd, PPO-CPA-Pd, PSF-DPP-Pd, PSF-CPA-Pd (DPP = diphenylphosphinyl, CPA = o-carboxy phenyl amino), PPO-M ( M = Pd, Cu, Co, Ni) , and PSF-Pd, were prepared by incorporating metal chloride with either modified or unmodified poly (2,6-dimethyl-l,4-~henylene oxide) (PPO) and polysulfone (PSF) . The Pd-containing polymers exhibit catalytic activity in the hydrogenation of cyclopentadiene under mild conditions (40"C, 0.1 MPa) both in alcohol solution and in the gas phase. The selectivity in the hydrogenation of diene to monoene in the gas phase can be controlled by adjusting the hydrogen partial pressure. The metal-containing polymers, PPO-M and PSFPd, can be cast easily into the membranes. The H2/N2 permselectivity for PPO-M is higher than that for unmodified PPO, whereas the permeability of H2 changes slightly. The H2 permeability and H2/Nz permselectivity for the PPO-Pd membrane are up to 67.5 barrers and 135, respectively. 0 1993 John Wiley & Sons, Inc. I NTRO D U C T 1 0 NMetal-containing polymeric materials have been studied extensively because of their potential applications as versatile materials.'-6 Much effort has been expended in studying these materials as catalysts, which are presumed to combine the virtues of both homogeneous and heterogeneous catalysts in various chemical reactions such as hydrogenation, carbonylation, oxidation, and polymeri~ation.~-'~ It has been indicated that in these materials metal complexes or metal ions, surrounded by giant polymer chains, show interesting physical properties and chemical reactivities that are different from those of the corresponding ordinary metal complexes or metal ions. On the other hand, many studies have also reported that the doping or coordination of metal ions or complexes, which may selectively and reversibly coordinate gases, into polymers is one approach to improve the permeability and permselectivity of the polymeric membranes."-23However, up to now, there has been no report dealing with metal-containing polymeric materials to be used in both catalytic reactions and gas separation. Recently, we prepared several metal-containing polymeric materials by incorporating transition metal chlorides into modified or unmodified poly ( 2,6-dimethyl-1,4-phenylene oxide) (PPO) and polysulfone (PSF) . The catalytic activities in the hydrogenation of cyclopentadiene and isoprene as well as the H2 and N2 permeabilities of these polymeric materials have been investigated. EXPERIMENTAL Preparation of Materials Preparation of PPO-DPP-Pd and PSF-DPP-PdThe brominated PPO substituted with bromine at aromatic carbon (PPO, Shanghai Institute of Syn-

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Preparation of Rh‐containing cellulose acetate films and the chemistry of Rh in cellulose acetate

Abstract: SYNOPSISRhCl [ P(C6H5),I3 complexes have been incorporated in cellulose acetate as a dispersion medium using cosolvent (tetrahydrofuran). The interactions between Rh ( I ) complexes and cellulose acetate (CA) are examined by infrared spectroscopy and thermal analysis.

Cited by 10 publications

References 25 publications

Preparation of Ruthenium-Containing Polycarbonate Films and the Chemistry of Ruthenium in Polycarbonate

Preparation of Ruthenium-Containing Polycarbonate Films and the Chemistry of Ruthenium in Polycarbonate

The chemistry of Pd in cellulose acetate

Catalytic hydrogenation and gas permeation properties of metal‐containing poly(phenylene oxide) and polysulfone

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