Subscribe to RSS
Please copy the URL and add it into your RSS Feed Reader.
https://www.thieme-connect.de/rss/thieme/en/10.1055-s-00000131.xml
Synfacts 2008(3): 0262-0262
DOI: 10.1055/s-2008-1042711
DOI: 10.1055/s-2008-1042711
Synthesis of Materials and Unnatural Products
© Georg Thieme Verlag Stuttgart · New York
Excellent Blue Fluorescent Trispirobifluorenes
S. Yu, H. Lin, Z. Zhao, Z. Wang, P. Lu*
Zhejiang University, Hangzhou, P. R. of China
Further Information
Publication History
Publication Date:
21 February 2008 (online)
Significance
Spiro-linked fluorophores exhibit greater morphological stability and more intense fluorescence than their nonspiro-linked parent compounds. The spiro center also tends to reduce intermolecular interactions that lead to a ‘green-emission tail’, which is undesirable for organic light-emitting-device (OLED) applications. Preparation of 9,9′-spirobifluorenes, however, is generally difficult. In this communication, S. Yu et al. synthesized trispirobifluorene 1 by cyclization of 2,7-diiodofluorene with pentaerythritol tetrabromide under basic conditions. Trispirobifluorene 1 was further elaborated by Suzuki or Sonagahira reactions.