Self-assembly behavior of a stimuli-responsive water-soluble [60]fullerene-containing polymer

Langmuir : the ACS Journal of Surfaces and Colloids
Sheng DaiKam Chiu Tam

Abstract

A novel pH- and temperature-responsive water-soluble [60]fullerene-containing poly[2-(dimethylamino)ethyl methacrylate] (C60-b-PDMAEMA) was synthesized by atom transfer radical polymerization. The pH and temperature dependence of the physical properties of the aqueous C60-b-PDMAEMA solution was studied by potentiometric and conductometric titrations, UV-vis transmittance, and laser light scattering techniques. At low pH and at temperatures ranging from 25 to 55 degrees C, in addition to C60-b-PDMAEMA unimers, micelle-like aggregates are produced in the aqueous solution containing C60 hydrophobic cores and protonated PDMAEMA shells. Only unimeric C60-b-PDMAEMAs are found to exist in solution at high pH and low temperature, where PDMAEMA segments form a charge-transfer complex with C60 molecules. However, C60-b-PDMAEMA precipitates from aqueous solution at temperatures exceeding the lower critical solution temperature of PDMAEMA of approximately 45 degrees C. The pH and temperature stimuli-responsive properties of the [60]fullerene-containing polymer in aqueous solution are completely reversible.

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Citations

Dec 30, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Jing TangWei Wang
Sep 22, 2009·International Journal of Pharmaceutics·Elena TarabukinaTatiana Budtova
Feb 17, 2009·Journal of Colloid and Interface Science·Hongmei KangHonglai Liu
Apr 17, 2013·Chemistry : a European Journal·Theodoros TsoufisDimitrios Gournis
Oct 15, 2011·Macromolecular Rapid Communications·Zhaoling Yao, Kam Chiu Tam
Feb 21, 2008·Soft Matter·Sheng DaiKam Chiu Tam
Jul 18, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Qiqiang Wang, Kam C Tam
Jul 31, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Chang WangKam Chiu Tam
Oct 27, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Hong HuoSuat Hong Goh
Apr 30, 2021·Frontiers in Cell and Developmental Biology·Simon C de GrootMargriet A Huisman
Aug 9, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·P RaviK C Tam
Nov 3, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Chung How TanKam Chiu Tam
Jul 21, 2006·The Journal of Physical Chemistry. B·P RaviK C Tam
Dec 15, 2006·Chemical Reviews·Francesco Giacalone, Nazario Martín
Jul 21, 2006·The Journal of Physical Chemistry. B·Soon Kay TeohKam Chiu Tam
Mar 22, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Chang WangKam Chiu Tam

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