Soluble, polymeric condensate of dibenzo-18-crown-6 and formaldehyde; synthesis, characterization and absorption of anionic copolymers

A. Warshawsky; A. Deshe; L. Shechtman; O. Kedem

doi:10.1016/0923-1137(90)90076-G

Soluble, polymeric condensate of dibenzo-18-crown-6 and formaldehyde; synthesis, characterization and absorption of anionic copolymers

A. Warshawsky, A. Deshe, L. Shechtman, O. Kedem

Research output: Contribution to journal › Article › peer-review

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Abstract

Dibenzo-18-crown-6 and formaldehyde polycondensate (PDBCO, M_w = 6760, soluble in CHCl₃ and in 2-methyl-1-pyrolidone (NMP) was synthesized by condensation in NMP using formic acid as catalyst. Alternatively, a sequence of reaction steps, involving sodium bromide salts, for solubilization (see Scheme 1) was worked up. PDBC as its sodium bromide complex is compatible with polysulfone derivatives. PDBC was found to be active in KSCN transport across a liquid membrane. Membranes cast from PDBC were also compared in adsorption of anionic proteins (PGT) with sulfonated polysulfone (SPS) or aminated polysulfone (APS). The absorption of PGT on PDBC membrane is strongest, but reversible. Thermal decomplexation of the cations neutralizes the cation-charged membrane and causes elution of the anionic PGT polymer.

Original language	English
Pages (from-to)	261-268
Number of pages	8
Journal	Reactive Polymers
Volume	12
Issue number	3
DOIs	https://doi.org/10.1016/0923-1137(90)90076-G
State	Published - 1 Jan 1990
Externally published	Yes

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General Engineering

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abstract = "Dibenzo-18-crown-6 and formaldehyde polycondensate (PDBCO, Mw = 6760, soluble in CHCl3 and in 2-methyl-1-pyrolidone (NMP) was synthesized by condensation in NMP using formic acid as catalyst. Alternatively, a sequence of reaction steps, involving sodium bromide salts, for solubilization (see Scheme 1) was worked up. PDBC as its sodium bromide complex is compatible with polysulfone derivatives. PDBC was found to be active in KSCN transport across a liquid membrane. Membranes cast from PDBC were also compared in adsorption of anionic proteins (PGT) with sulfonated polysulfone (SPS) or aminated polysulfone (APS). The absorption of PGT on PDBC membrane is strongest, but reversible. Thermal decomplexation of the cations neutralizes the cation-charged membrane and causes elution of the anionic PGT polymer.",

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AU - Warshawsky, A.

AU - Deshe, A.

AU - Shechtman, L.

AU - Kedem, O.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - Dibenzo-18-crown-6 and formaldehyde polycondensate (PDBCO, Mw = 6760, soluble in CHCl3 and in 2-methyl-1-pyrolidone (NMP) was synthesized by condensation in NMP using formic acid as catalyst. Alternatively, a sequence of reaction steps, involving sodium bromide salts, for solubilization (see Scheme 1) was worked up. PDBC as its sodium bromide complex is compatible with polysulfone derivatives. PDBC was found to be active in KSCN transport across a liquid membrane. Membranes cast from PDBC were also compared in adsorption of anionic proteins (PGT) with sulfonated polysulfone (SPS) or aminated polysulfone (APS). The absorption of PGT on PDBC membrane is strongest, but reversible. Thermal decomplexation of the cations neutralizes the cation-charged membrane and causes elution of the anionic PGT polymer.

AB - Dibenzo-18-crown-6 and formaldehyde polycondensate (PDBCO, Mw = 6760, soluble in CHCl3 and in 2-methyl-1-pyrolidone (NMP) was synthesized by condensation in NMP using formic acid as catalyst. Alternatively, a sequence of reaction steps, involving sodium bromide salts, for solubilization (see Scheme 1) was worked up. PDBC as its sodium bromide complex is compatible with polysulfone derivatives. PDBC was found to be active in KSCN transport across a liquid membrane. Membranes cast from PDBC were also compared in adsorption of anionic proteins (PGT) with sulfonated polysulfone (SPS) or aminated polysulfone (APS). The absorption of PGT on PDBC membrane is strongest, but reversible. Thermal decomplexation of the cations neutralizes the cation-charged membrane and causes elution of the anionic PGT polymer.

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Soluble, polymeric condensate of dibenzo-18-crown-6 and formaldehyde; synthesis, characterization and absorption of anionic copolymers

Abstract

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