Polymerization of N-carbazolylacetylene by various transition metal catalysts and polymer properties

✍ Scribed by Tomoaki Sata; Ryoji Nomura; Tatsuo Wada; Hiroyuki Sasabe; Toshio Masuda

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 124 KB
• Volume: 36
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(199810)36:14<2489::aid-pola7>3.0.co;2-o

✦ Synopsis

N-Carbazolylacetylene (CzA)

was polymerized in the presence of various transition metal catalysts including WCl 6 , MoCl 5 , [Rh(NBD)Cl] 2 , and Fe(acac) 3 to give polymers in good yields. The polymers produced with W catalysts were dark purple solids and soluble in organic solvents such as toluene, chloroform, etc. The highest weight-average molecular weight of poly(CzA) reached about 4 ϫ 10 4 . In the UV-visible spectrum in CHCl 3 , poly(CzA) exhibited an absorption maximum around 550 nm ( max ϭ 4.0 ϫ 10 3 M Ϫ1 cm Ϫ1 ) and the cutoff wavelength was 740 nm, showing a large red shift compared with that of poly(phenylacetylene) [poly(PA)]. Poly(CzA) began to lose weight in TGA under air at 310°C, being thermally more stable than poly(PA) and poly[3-(Ncarbazolyl)-1-propyne]. Poly(CzA) showed a third-order susceptibility of 18 ϫ 10 Ϫ12 esu, which was 2 orders larger than that of poly(PA).