Synthesis and photochemical properties of polyphenylene dendrimers with photoreactive stilbene core

✍ Scribed by Masako Imai; Tatsuo Arai

• Publisher: Elsevier Science
• Year: 2002
• Tongue: French
• Weight: 142 KB
• Volume: 43
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(02)01063-8

✦ Synopsis

Photoresponsive polyphenylene dendrimers trans-1 and 2 were synthesized for the first time, and their photochemical reaction as well as excited state properties were studied. trans-1 and 2 exhibited fluorescence emission with considerably high quantum efficiency. Furthermore, they underwent photochemical isomerization to the cis-isomers. Thus, polyphenylene dendrimer trans-2 with the molecular weight as high as 4700 and with weak conjugation throughout the molecule was found to undergo trans-cis photoisomerization within its excited state lifetime.