123rd General Meeting of the KCS

Type Poster Presentation
Area Polymer Chemistry
Room No. Exhibition Hall 2
Time 4월 19일 (금요일) 11:00~12:30
Code POLY.P-28
Subject Co-oligomerizations of 2,5-Dibromo-1,1-diisopropyl (or dihexyl)-3,4-diphenyl-siloles with 4,4'-(Hexafluoroisopropylidene)diphenol or 4,4'-Biphenol and their Characterizations
Authors Jong Wook Lim, Young Tae Park1,*
Keimyung University, Korea
1Department of Chemistry, Keimyung University, Korea
Abstract 2,5-Dibromo-1,1-diisopropyl (or dihexyl)-3,4-diphenyl-siloles as monomers were prepared by intramolecular reductive cyclization reactions of diisopropyl (or dihexyl)-bis(phenylethynyl)silanes using lithium naphthalenide, anhydrous ZnCl2, and N-bromosuccinimide (NBS), respectively. Co-oligomerization reactions of 2,5-dibromo-1,1-diisopropyl (or dihexyl)-3,4-diphenyl-siloles with 4,4'-(hexafluoro-isopropylidene)diphenol or 4,4'-biphenol were carried out by the nucleophilic substitution reaction of two bromine groups in the presence of potassiumcabonate under the solvent of N-methyl-2-pyrrolidinone (NMP) and toluene by azeotrope using Dean-Stark trap. The crude oligomeric products were purified by extraction using the solvents of tetrahydrofuran and dichloromethane, and washed with deionized water. The oligomeric product materials were characterized by 1H, 13C, and 29Si NMR as well as GPC. We also studied the photoelectronic properties by UV-vis absorption, excitation, and fluorescence emission spectroscopic methods, in particular. Acknowledgment. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) grant funded by the Ministry of Education of the Republic of Korea (NRF-2017R1D1A3B03028014).
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