Syntheses and spectroscopic properties of energy transfer systems based on squaraines Academic Article uri icon


  • The purpose of this project was to prepare fluorescent dyes that could absorb energy at relatively short wavelengths, and fluoresce in the near-IR region. To achieve this, copper- and palladium-mediated C-N couplings were used to prepare the 'cassettes', i.e the carbazole derivative 3b and the carbazole-, phenothiazine-, and phenoazine-squaraines 4b-d. These compounds have carbazole, phenothiazine, and phenoazine donor-components that absorb around about 300-320nm, and squaraine acceptor-parts that fluoresce in the range 650-700nm. The efficiencies of energy transfer from the donor to the acceptor, and the overall quantum yields of the cassettes were determined. © 2003 Elsevier Science Ltd. All rights reserved.

author list (cited authors)

  • Jiao, G., Loudet, A., Lee, H. B., Kalinin, S., Johansson, L., & Burgess, K.

citation count

  • 34

publication date

  • April 2003