Unknown

Dataset Information

0

Hemin-G-quadruplex-crosslinked poly-N-isopropylacrylamide hydrogel: a catalytic matrix for the deposition of conductive polyaniline.


ABSTRACT: A G-rich nucleic acid-tethered acrylamide/N-isopropylacrylamide (NIPAM) copolymer is prepared. The nucleic acid-modified pNIPAM chains assemble, in the presence of K+ ions, into a stimuli-responsive G-quadruplex-crosslinked pNIPAM hydrogel undergoing cyclic and reversible solution/hydrogel/solid transitions. Addition of kryptofix [2.2.2], CP, to the K+-stabilized G-quadruplex-crosslinked hydrogel eliminates the K+ ions from the crosslinking units, resulting in the transition of the hydrogel into a pNIPAM solution. In turn, heating the pNIPAM hydrogel from 25 °C to 40 °C results in the transition of the hydrogel to the solid state, and cooling the solid to 25 °C restores the hydrogel state. Incorporation of hemin into the G-quadruplex-crosslinked hydrogel results in a catalytic hydrogel that catalyzes the oxidation of aniline by H2O2 to form polyaniline. The polyaniline/pNIPAM hydrogel hybrid doped with 2 M HCl forms an emeraldine salt, which exhibits an electrical conductivity of 9 × 10-4 [cm ?]-1.

SUBMITTER: Lu CH 

PROVIDER: S-EPMC5802269 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature

altmetric image

Publications

Hemin-G-quadruplex-crosslinked poly-<i>N</i>-isopropylacrylamide hydrogel: a catalytic matrix for the deposition of conductive polyaniline.

Lu Chun-Hua CH   Guo Weiwei W   Qi Xiu-Juan XJ   Neubauer Avner A   Paltiel Yossi Y   Willner Itamar I  

Chemical science 20150810 11


A G-rich nucleic acid-tethered acrylamide/<i>N</i>-isopropylacrylamide (NIPAM) copolymer is prepared. The nucleic acid-modified pNIPAM chains assemble, in the presence of K<sup>+</sup> ions, into a stimuli-responsive G-quadruplex-crosslinked pNIPAM hydrogel undergoing cyclic and reversible solution/hydrogel/solid transitions. Addition of kryptofix [2.2.2], CP, to the K<sup>+</sup>-stabilized G-quadruplex-crosslinked hydrogel eliminates the K<sup>+</sup> ions from the crosslinking units, resultin  ...[more]

Similar Datasets

| S-EPMC7827658 | biostudies-literature
| S-EPMC7921990 | biostudies-literature
| S-EPMC9222261 | biostudies-literature
| S-EPMC8482244 | biostudies-literature
| S-EPMC8706719 | biostudies-literature
| S-EPMC5979304 | biostudies-literature
| S-EPMC9057382 | biostudies-literature
| S-EPMC6005209 | biostudies-literature
| S-EPMC5323342 | biostudies-literature
| S-EPMC9962410 | biostudies-literature