Temperature and acid/base-driven dual switching of poly(N-isopropylacrylamide) hydrogel with Azo dye

Fibers and Polymers

Volumn 12, Issue 1, 2011, Pages 142-144

  Lee, Eun Mi ^a   Gwon, Seon Yeong ^a   Ji, Byung Chul ^a   Kim, Sung Hoon ^a  

^a Kyungpook National University   (South Korea)

Author keywords

Acid base behavior; Dual switching; Hydrogel; Lower critical solution temperature (LCST); Poly(N isopropylacrylamide)

Indexed keywords

ACID/BASE-BEHAVIOR; AQUEOUS SOLUTIONS; COLOR CHANGES; DUAL SENSOR; DUAL-SWITCHING; LOWER CRITICAL SOLUTION TEMPERATURE; LOWER CRITICAL SOLUTION TEMPERATURE (LCST); MOLECULAR SWITCHES; POLY HYDROGELS; POLY(N-ISOPROPYLACRYLAMIDE); RADICAL COPOLYMERIZATION; THERMO-RESPONSIVE; UV-VIS SPECTROSCOPY; WATERSOLUBLE;

ACRYLIC MONOMERS; AMIDES; AZO DYES; COPOLYMERIZATION; COPOLYMERS; ULTRAVIOLET SPECTROSCOPY;

HYDROGELS;

EID: 79952271193     PISSN: 12299197     EISSN: None     Source Type: Journal    
DOI: 10.1007/s12221-011-0142-0     Document Type: Article

References (23)

1. B. L. Feringa, "Molecular Switches", Wiley-VCH, Weinheim, Germany, 2001.
2. G. W. Gokel, W. M. Leevy, and M. E. Weber, Chem. Rev., 104, 2723 (2004).
3. H. Tian and S. Wang, Chem. Commun., 8, 781 (2007).
4. S. Nagl and O. S. Wolfbeis, Analyst., 132, 507 (2007).
5. C. Pietsch, R. Hoogenboom, and U. S. Schubert, Angew. Chem. Int. Edit., 48, 5653 (2009).
6. M. I. J. Stich, S. Nagl, O. S. Wolfbeis, U. Henne, and M. Schaeferling, Adv. Funct. Mater., 18, 1399 (2008).
7. S. M. Borisov and O. S. Wolfbeis, Anal. Chem., 78, 5094 (2006).
8. P. A. S. Jorge, C. Maule, A. J. Silva, R. Benrashid, J. L. Santos, and F. Farahi, Anal. Chim. Acta, 606, 223 (2008).
9. S. M. Borisov, C. Krause, S. Arain, and O. S. Wolfbeis, Adv. Func. Mater., 18, 1511 (2006).
10. G. S. Vasylevska, S. M. Borisov, C. Krause, and O. S. Wolfbeis, Chem. Mater., 18, 4609 (2006).
11. S. H. Kim, I. J. Hwang, S. Y. Gwon, and Y. A. Son, Dye. Pigm., 87, 158 (2010).
12. P. Terech and R. G. Weiss, Chem. Rev., 97, 3133 (1997).
13. D. J. Abdullah and R. G. Weiss, Adv. Mater., 12, 1237 (2000).
14. S. Wang, W. Shen, Y. L. Feng, and H. Tian, Chem. Commun., 14, 1497 (2006).
15. M. Numata, K. Sugiyasu, T. Hasegawa, and S. Shinkai, Angew. Chem., Int. Edit., 43, 3279 (2004).
16. L. E. Bromberg and E. S. Ron, Adv. Drug Deliver. Rev., 31, 197 (1998).
17. T. Okajima, I. Harada, K. Nishio, and S. Hirotsu, J. Chem. Phys., 116, 9068 (2002).
18. Z. Guo, W. Zhu, and H. Tian, Macromolecules, 43, 739 (2010).
19. S. Wang and S. H. Kim, Spectrochim. Acta A, 72, 677 (2009).
20. S. H. Kim, S. Y. Lee, S. Y. Gwon, Y. A. Son, and J. S. Bae, Dye. Pigm., 84, 169 (2010).
21. +).
22. N-Isopropylacrylamide 4 (4. 52 g, 40 mmol), dye monomer 3 (0. 153 g, 0. 4 mmol) and 2, 2′-azobis-(isobutyronitrile) (0. 066 g, 0. 4 mmol) were dissolved in anhydrous THF (50 ml) under nitrogen atmosphere. After being heated for 3 days at 70 °C, the resultant mixture was precipitated from diethyl ether. The precipitated polymer was filtered and washed with diethyl ether, and finally dried in vacuum for 24 hours. Yield: 71 %, GPC Mn: 7820, Mw: 11860, Mw/Mn: 1. 51.
23. A. Garcia, M. Marquez, T. Cai, R. Rosario, Z. Hu, D. Gust, M. Hayes, S. A. Vail, and C. D. Park, Langmuir, 23, 224 (2007).