Synthesis, characterization and photophysical properties of DCM-based light-harvesting dendrimers

Mahalingam Vanjinathan, Hong-Cheu Lin, A. Sultan Nasar

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

A series of highly soluble light-harvesting dendrimers up to third generation were synthesized using a DCM-based core and Frechet-type benzyl ether dendrons containing pyrene end groups. All dendrimers and intermediates were characterized by FTIR, 1H NMR, MALDI-TOF MS, UV-Vis, and PL spectra and EA, GPC, and TGA techniques. The dendrimers emit strong red PL around 570 nm. The excitation of the terminal chromophores results in core emission alone, as the donor emission is seriously quenched due to FRET to the core. The dendrimers showed enhanced luminescence properties of the core, and its efficiency was dependent on the generation number of the dendrimers. The above results reveal that these dendrimers are suitable candidates for red emissive materials in OLEDs. A novel series of light-harvesting dendrimers up to third generation were synthesized. These dendrimers shown excellent thermal stability and emit strong red photoluminescence (PL) around 570nm upon photoexcitation. This result reveals that these dendrimers are suitable candidates for the application in organic light-emitting diodes.

Original languageEnglish
Pages (from-to)849-859
Number of pages11
JournalMacromolecular Chemistry and Physics
Volume212
Issue number8
DOIs
StatePublished - 15 Apr 2011

Keywords

  • FRET
  • dendrimers
  • fluorescence
  • light harvesting
  • star polymers

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