Insight into the polymerization mechanism of photoinduced step transfer-addition & radical-termination (START) polymerizations
作者： Tianchi Xu , Lifen Zhang , Zhenping Cheng , Xiulin Zhu
DOI: 10.1039/C7PY00709D
关键词:
摘要: Photoinduced step transfer-addition & radical-termination (START) polymerization is a newly developed strategy for the preparation of perfluorocarbon-containing alternating copolymers and was carried out under irradiation with blue light emitting diodes (LEDs) at room temperature (25 °C). In this work, efficiency further enhanced through optimization solvent system construction an efficient catalytic system: Ru(bpy)3Cl2/reducing agent (RA). dimethyl carbonate (DMC)/acetonitrile (MeCN), polyaddition between α,ω-diiodoperfluoroalkanes A α,ω-unconjugated dienes B predominated over chain transfer reaction, generating target polymer product (AB)n relatively high molecular weight. Detailed analyses template reaction revealed intrinsic mechanism START process. Based on comprehensive investigation process, guidelines selection appropriate RAs (e.g., L(+)-ascorbic acid sodium salt (AsAc-Na) Fe(0)) are provided herein.
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sci-hub.se 参考文章(46)
Peter Černoch, Svetlana Petrova, Zulfiya Černochová, Joon-Sung Kim, Christopher P Simpson, Alexandru D Asandei, None, Mn2(CO)10-photomediated synthesis of poly(vinylidene fluoride)-b-poly(styrene sulfonate) European Polymer Journal. ,vol. 68, pp. 460- 470 ,(2015) , 10.1016/J.EURPOLYMJ.2015.05.013
DENNIS W SMITH JR, SCOTT T IACONO, SURESH S IYER, None, Handbook of fluoropolymer science and technology John Wiley & Sons, Inc. ,(2014)
Masami Kamigaito, Tsuyoshi Ando, Mitsuo Sawamoto, Metal-catalyzed living radical polymerization. Chemical Reviews. ,vol. 101, pp. 3689- 3746 ,(2001) , 10.1021/CR9901182
V. Percec, M. Glodde, T. K. Bera, Y. Miura, I. Shiyanovskaya, K. D. Singer, V. S. K. Balagurusamy, P. A. Heiney, I. Schnell, A. Rapp, H.-W. Spiess, S. D. Hudson, H. Duan, Self-organization of supramolecular helical dendrimers into complex electronic materials Nature. ,vol. 419, pp. 384- 387 ,(2002) , 10.1038/NATURE01072
T. Davidson, A. C. Griffin, L. M. Wilson, A. H. Windle, Liquid-Crystalline Behavior in Fluorocarbon-Hydrocarbon Microblock polymers. 2 Macromolecules. ,vol. 28, pp. 354- 357 ,(1995) , 10.1021/MA00105A049
Zhi-Min Wang, Ming Shen, Enantiocontrolled Construction of Functionalized Tetrahydrofurans: Total Synthesis of (6S,7S,9R,10R)-6,9-Epoxynonadec-18-ene-7,10-diol, a Marine Natural Product Journal of Organic Chemistry. ,vol. 63, pp. 1414- 1418 ,(1998) , 10.1021/JO971324H
Guan Zhang, In Young Song, Kyo Han Ahn, Taiho Park, Wonyong Choi, Free Radical Polymerization Initiated and Controlled by Visible Light Photocatalysis at Ambient Temperature Macromolecules. ,vol. 44, pp. 7594- 7599 ,(2011) , 10.1021/MA201546C
Yoshito Takeuchi, Yoshitake Suzuki, Fumiyasu Ono, Kenji Manabe, Synthesis of 5,5,6,6,21,21,22,22-octamethyl-5,6,21,22-tetragerma[10.10]paracyclophane Journal of Organometallic Chemistry. ,vol. 678, pp. 61- 67 ,(2003) , 10.1016/S0022-328X(03)00432-7
L. M. Wilson, A. C. Griffin, Liquid-crystalline fluorocarbon-hydrocarbon microblock polymers Macromolecules. ,vol. 26, pp. 6312- 6314 ,(1993) , 10.1021/MA00075A030
Kotaro Satoh, Masato Mizutani, Masami Kamigaito, Metal-catalyzed radical polyaddition as a novel polymer synthetic route Chemical Communications. pp. 1260- 1262 ,(2007) , 10.1039/B616598B