Preparation and properties of polytolan membranes bearing p-hydroxyl groups

Shida, Yuichi; Sakaguchi, Toshikazu; Shiotsuki, Masashi; Wagener, Kenneth B.; Masuda, Toshio

doi:10.1016/j.polymer.2004.10.076

Cited by 25 publications

(17 citation statements)

References 18 publications

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“…107,108 These monomers provided the corresponding polymers with high molecular weight in good yields. Desilylation of poly(15) membrane catalyzed by trifluoroacetic acid yielded poly(diphenylacetylene) having free hydroxyl groups [poly(15-OH)], which is the first example of highly polar group-carrying poly(diphenylacetylene).…”

Section: Functions Of Substituted Polyacetylenesmentioning

confidence: 97%

Substituted polyacetylenes

Masuda

2006

J. Polym. Sci. A Polym. Chem.

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This article reviews the chemistry of substituted polyacetylenes developed by our research group, more specifically, development of polymerization catalyst, synthesis of new polymers, elucidation of their structure, investigation of their properties, and development of their functions. The main features are as follows: a number of catalysts based on group 5, 6, and 9 transition metals (Nb, Ta, Mo, W, and Rh) have been developed, which include living polymerization catalysts. By using these catalysts, many new substituted polyacetylenes have been synthesized, whose molecular weights are very high (Mw = 104−106). Most of the polymers are soluble in many common solvents and stable enough in the air unlike polyacetylene. Some of these polymers exhibit interesting functions including high gas permeability and photoelectronic properties. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 165–180, 2007

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Section: Functions Of Substituted Polyacetylenesmentioning

confidence: 97%

Substituted polyacetylenes

Masuda

2006

J. Polym. Sci. A Polym. Chem.

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392

222

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“…3-5 days). With reference to the method described in the literature [14,15], the desilylation reaction of the membranes of 2c and 2d was carried out using TFA. A typical procedure of the desilylation reaction is as follows: A polymer membrane was immersed in a mixture of TFA and water (volume ratio 9:1) at room temperature for 24 h. To neutralize the remaining acid in the polymer matrix, the membrane was then immersed in aqueous NaHCO 3 solution at room temperature for 24 h. Finally, the membrane was immersed in water for 24 h to remove residual impurities and dried to constant weight at room temperature for 24 h.…”

Section: Membrane Fabrication and Desilylationmentioning

confidence: 99%

“…In a similar way, poly(diphenylacetylenes) having hydroxy groups (3a and 3b in Scheme 1) are prepared using the protection/deprotection methodology [14,15], which cannot be obtained directly by the polymerization of the corresponding monomers with Ta catalyst owing to its intolerance to polar groups such as hydroxy group. These polymer membranes show outstanding separation performance for CO 2 against methane and nitrogen.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and gas permeation properties of poly(diphenylacetylenes) having bulky alkyl/silyl and hydroxy groups

Hu¹,

Sakaguchi²,

Shiotsuki³

et al. 2006

Journal of Membrane Science

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“…Polymerization of substituted acetylenes provides a useful tool for synthesis of various poly(acetylene) derivatives which have potential utility as electrical and optoelectronic materials, materials for gas or liquid-mixture separation and so on [1][2][3][4][5][6][7][8]. The substituted poly(acetylene)s are practically more useful because of their higher stability towards air and their solubility in organic solvents compared to non-substituted poly(acetylene) [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%