Self-assembly and lower critical solution temperature properties of supramolecular block copolymer/ionic liquid complexes depending on the alkyl chain length of imidazolium rings

2017 ◽  
Vol 55 (21) ◽  
pp. 3587-3596 ◽  
Author(s):  
Minjoo Noh ◽  
Byoung-Ki Cho
Keyword(s):  
Ionic Liquid ◽  
Block Copolymer ◽  
Chain Length ◽  
Self Assembly ◽  
Lower Critical Solution Temperature ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Solution Temperature ◽  
Critical Solution Temperature

Key Factors to Prepare Polyelectrolytes Showing Temperature-Sensitive Lower Critical Solution Temperature-type Phase Transitions in Water

2012 ◽  
Vol 65 (1) ◽  
pp. 91 ◽  
Author(s):  
Yuki Kohno ◽  
Hiroyuki Ohno
Keyword(s):  
Phase Transition ◽  
Lower Critical Solution Temperature ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Phase Behaviour ◽  
Solution Temperature ◽  
Temperature Sensitive ◽  
Key Factors ◽  
Critical Solution Temperature ◽  
Type Phase

Tetrabutylphosphonium styrenesulfonate and its homopolymer showed a lower critical solution temperature-type phase transition in water. As the hydrophobicity of these monomeric and polymeric salts affects phase behaviour, the phase transition temperature of the polyelectrolyte was changed by the introduction of monomers having different alkyl chain length on the phosphonium cations.

Design of Ionic Liquid-Derived Polyelectrolyte Gels Toward Reversible Water Absorption/Desorption System Driven by Small Temperature Change

2014 ◽  
Vol 67 (11) ◽  
pp. 1666 ◽  
Author(s):  
Yuki Deguchi ◽  
Yuki Kohno ◽  
Hiroyuki Ohno
Keyword(s):  
Ionic Liquid ◽  
Transition Temperature ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Solution Temperature ◽  
Small Temperature ◽  
Critical Solution Temperature ◽  
Polyelectrolyte Gels ◽  
Type Phase ◽  
Chain Lengths

Suitably designed polyelectrolytes derived from tributyl-n-alkylphosphonium 3-sulfopropylmethacrylate-type ionic liquid (IL) monomers undergo a lower critical solution temperature (LCST)-type phase transition, and their transition temperature is a function of the alkyl chain length on the phosphonium cations. Based on this finding, we have successfully prepared chemically cross-linked polyelectrolyte gels, poly(IL) gels, to show the LCST-type phase change. The hydrated state of the prepared poly(IL) gels varied widely with temperature. They desorbed water by elevating the temperature only by a few degrees. Their transition temperature was finely controlled by mixing the composition of IL monomers with different alkyl chain lengths.

scholarly journals Self-assembly of fluorescent diimidazolium salts: tailor properties of the aggregates changing alkyl chain features

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59502-59512 ◽  
Author(s):  
Floriana Billeci ◽  
Francesca D'Anna ◽  
Salvatore Marullo ◽  
Renato Noto
Keyword(s):  
Chain Length ◽  
Self Assembly ◽  
Alkyl Chain ◽  
Alkyl Chain Length

Self assembly of fluorescent diimidazolium NDI salts showed properties of aggregates changing with alkyl chain length, with an odd–even effect.

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