Self-assembly of charged Bodipy dyes to form Cassettes that display intracomplex electronic energy transfer and accrete into liquid crystals.

Jean-Hubert Olivier, Joaquín Barberá, Effat Bahaidarah, Anthony Harriman, Raymond Ziessel

Index: J. Am. Chem. Soc. 134(14) , 6100-6103, (2012)

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Abstract

Red- and blue-absorbing boron dipyrromethene dyes, bearing opposite electronic charges, associate in solution to form a 1:2 complex having a stability constant of ca. 10(17) M(-2). The complex can be dismantled by addition of a large excess of tetra-N-butylammonium cations. The same complex displays liquid crystalline properties on heating from rt to above 150 °C, as characterized by various experimental techniques. Highly efficient electronic energy transfer from the red to the blue dye occurs in both the initial complex and the subsequent mesomorphic state.© 2012 American Chemical Society