Synthesis and solvatochromism of soluble polyethers containing isolated emissive p-aryl vinylene derivatives

✍ Scribed by Shiao-Wen Hwang; Yun Chen

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 162 KB
• Volume: 38
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(20000415)38:8<1311::aid-pola15>3.0.co;2-0

✦ Synopsis

Two soluble polyethers ( red Ͼ 0.4 dL/g) consisting of isolated emissive p-aryl vinylene derivatives have been synthesized and characterized. The introductions of ether linkages and aliphatic chains result in enhanced solubility in common organic solvents such as tetrahydrofuran (THF) and chloroform. The polyethers exhibit good thermal stability with onset decomposition temperatures at around 400 °C in nitrogen. The photoluminescence spectra of the two polyethers show a maximum peaks at 446 and 394 nm, respectively. The shifts of the photoluminescence maxima are controlled by the steric conformation of the emissive chromophores. On the other part, an interesting solvatochromism of three polyethers was observed in solution. The absorption maxima of dilute polymeric solutions exhibit bathochromism at first, and then hypsochromism with increasing solvent polarity. This may be due to the alteration of the electronic structure in these emissive polyethers.