Multimodal Stimuli-Responsive Poly(2-isopropyl-2-oxazoline) with Dual Molecular Logic Gate Operations

Joo Ho Kim, Eunhye Koo, Sang-Yong Ju, Woo Dong Jang

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Azobenzene end-functionalized telechelic POx (Az-POx-Az) was designed for as multimodal stimuli-responsive polymer. Az-POx-Az (0.25 g/L) in physiological saline (150 mM NaCl) phosphate buffered solution (10 mM PBS, pH 7.4) exhibited fully reversible trans-cis photoisomerism upon alternate irradiation with 365 and 254 nm UV light. The photoisomerization of the azobenzene moieties influenced the lower critical solution temperature (LCST), and the cis form exhibited a slightly higher LCST than the trans form. Circular dichroism measurements of Az-POx-Az with cyclodextrins (CDs) exhibited induced circular dichroism at the absorption band of the azobenzene moiety, indicating the formation of host-guest complexes between the azobenzene moieties in Az-POx-Az and the CDs. After formation of host-guest complexes consisting of the azobenzene moieties and the CDs, Az-POx-Az exhibited increased LCSTs. Interestingly, the LCSTs of Az-POx-Az with α-CD and β-CD moved in opposite directions upon photoisomerization. By the changing from the trans to cis form, Az-POx-Az with α-CD exhibited a decreased LCST; however, Az-POx-Az with β-CD exhibited an increased LCST. Using the interconversions between the transparent and turbid states of the Az-POx-Az solution, we could realize two different logic circuit modes using three different external stimuli, i.e., temperature, UV light, and cyclodextrins.

Original languageEnglish
Pages (from-to)4951-4956
Number of pages6
JournalMacromolecules
Volume48
Issue number14
DOIs
Publication statusPublished - 2015 Jul 28

Fingerprint

Logic gates
Cyclodextrins
Azobenzene
Photoisomerization
Dichroism
Ultraviolet radiation
Temperature
Logic circuits
Absorption spectra
Polymers
Phosphates
azobenzene
Irradiation

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

@article{cfd1e83a74f34879a89a6b930af4a33a,
title = "Multimodal Stimuli-Responsive Poly(2-isopropyl-2-oxazoline) with Dual Molecular Logic Gate Operations",
abstract = "Azobenzene end-functionalized telechelic POx (Az-POx-Az) was designed for as multimodal stimuli-responsive polymer. Az-POx-Az (0.25 g/L) in physiological saline (150 mM NaCl) phosphate buffered solution (10 mM PBS, pH 7.4) exhibited fully reversible trans-cis photoisomerism upon alternate irradiation with 365 and 254 nm UV light. The photoisomerization of the azobenzene moieties influenced the lower critical solution temperature (LCST), and the cis form exhibited a slightly higher LCST than the trans form. Circular dichroism measurements of Az-POx-Az with cyclodextrins (CDs) exhibited induced circular dichroism at the absorption band of the azobenzene moiety, indicating the formation of host-guest complexes between the azobenzene moieties in Az-POx-Az and the CDs. After formation of host-guest complexes consisting of the azobenzene moieties and the CDs, Az-POx-Az exhibited increased LCSTs. Interestingly, the LCSTs of Az-POx-Az with α-CD and β-CD moved in opposite directions upon photoisomerization. By the changing from the trans to cis form, Az-POx-Az with α-CD exhibited a decreased LCST; however, Az-POx-Az with β-CD exhibited an increased LCST. Using the interconversions between the transparent and turbid states of the Az-POx-Az solution, we could realize two different logic circuit modes using three different external stimuli, i.e., temperature, UV light, and cyclodextrins.",
author = "Kim, {Joo Ho} and Eunhye Koo and Sang-Yong Ju and Jang, {Woo Dong}",
year = "2015",
month = "7",
day = "28",
doi = "10.1021/acs.macromol.5b01046",
language = "English",
volume = "48",
pages = "4951--4956",
journal = "Macromolecules",
issn = "0024-9297",
publisher = "American Chemical Society",
number = "14",

}

Multimodal Stimuli-Responsive Poly(2-isopropyl-2-oxazoline) with Dual Molecular Logic Gate Operations. / Kim, Joo Ho; Koo, Eunhye; Ju, Sang-Yong; Jang, Woo Dong.

In: Macromolecules, Vol. 48, No. 14, 28.07.2015, p. 4951-4956.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Multimodal Stimuli-Responsive Poly(2-isopropyl-2-oxazoline) with Dual Molecular Logic Gate Operations

AU - Kim, Joo Ho

AU - Koo, Eunhye

AU - Ju, Sang-Yong

AU - Jang, Woo Dong

PY - 2015/7/28

Y1 - 2015/7/28

N2 - Azobenzene end-functionalized telechelic POx (Az-POx-Az) was designed for as multimodal stimuli-responsive polymer. Az-POx-Az (0.25 g/L) in physiological saline (150 mM NaCl) phosphate buffered solution (10 mM PBS, pH 7.4) exhibited fully reversible trans-cis photoisomerism upon alternate irradiation with 365 and 254 nm UV light. The photoisomerization of the azobenzene moieties influenced the lower critical solution temperature (LCST), and the cis form exhibited a slightly higher LCST than the trans form. Circular dichroism measurements of Az-POx-Az with cyclodextrins (CDs) exhibited induced circular dichroism at the absorption band of the azobenzene moiety, indicating the formation of host-guest complexes between the azobenzene moieties in Az-POx-Az and the CDs. After formation of host-guest complexes consisting of the azobenzene moieties and the CDs, Az-POx-Az exhibited increased LCSTs. Interestingly, the LCSTs of Az-POx-Az with α-CD and β-CD moved in opposite directions upon photoisomerization. By the changing from the trans to cis form, Az-POx-Az with α-CD exhibited a decreased LCST; however, Az-POx-Az with β-CD exhibited an increased LCST. Using the interconversions between the transparent and turbid states of the Az-POx-Az solution, we could realize two different logic circuit modes using three different external stimuli, i.e., temperature, UV light, and cyclodextrins.

AB - Azobenzene end-functionalized telechelic POx (Az-POx-Az) was designed for as multimodal stimuli-responsive polymer. Az-POx-Az (0.25 g/L) in physiological saline (150 mM NaCl) phosphate buffered solution (10 mM PBS, pH 7.4) exhibited fully reversible trans-cis photoisomerism upon alternate irradiation with 365 and 254 nm UV light. The photoisomerization of the azobenzene moieties influenced the lower critical solution temperature (LCST), and the cis form exhibited a slightly higher LCST than the trans form. Circular dichroism measurements of Az-POx-Az with cyclodextrins (CDs) exhibited induced circular dichroism at the absorption band of the azobenzene moiety, indicating the formation of host-guest complexes between the azobenzene moieties in Az-POx-Az and the CDs. After formation of host-guest complexes consisting of the azobenzene moieties and the CDs, Az-POx-Az exhibited increased LCSTs. Interestingly, the LCSTs of Az-POx-Az with α-CD and β-CD moved in opposite directions upon photoisomerization. By the changing from the trans to cis form, Az-POx-Az with α-CD exhibited a decreased LCST; however, Az-POx-Az with β-CD exhibited an increased LCST. Using the interconversions between the transparent and turbid states of the Az-POx-Az solution, we could realize two different logic circuit modes using three different external stimuli, i.e., temperature, UV light, and cyclodextrins.

UR - http://www.scopus.com/inward/record.url?scp=84937831803&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84937831803&partnerID=8YFLogxK

U2 - 10.1021/acs.macromol.5b01046

DO - 10.1021/acs.macromol.5b01046

M3 - Article

VL - 48

SP - 4951

EP - 4956

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 14

ER -