Synthesis and properties of novel polymers having S-methyldibenzothiophenium salt moieties

✍ Scribed by Osamu Shimomura; Toshihiko Sato; Ikuyoshi Tomita; Masato Suzuki; Takeshi Endo

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 153 KB
• Volume: 36
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(199808)36:11<1779::aid-pola11>3.0.co;2-b

✦ Synopsis

A polymer having dibenzothiophenium salt moieties [poly(sulfonium salt), 2] was prepared by the reaction of poly(2-vinyldibenzothiophene) (1) with CH 3 I and AgBF 4 in CH 2 ClCH 2 Cl at room temperature for 24 h. The obtained polymer 2 was found to contain 71% of the methyldibenzothiophenium tetrafluoroborate unit. A monomer carrying the sulfonium salt moiety, i.e., 5-methyl-2-vinyldibenzothiophenium tetrafluoroborate ( 4), was independently prepared and subjected to radical polymerization to give a polymer ( 5) in 88% yield (methyldibenzothiophenium tetrafluoroborate unit: 79%). The thermal decompositions of 2 and 5 took place in two steps; the first step involved the formation of polymer 1 by demethylation.