Carborane–fullerene hybrids as a seemingly attractive–attractive dyad with high hyperpolarizabilitySee http://www.rsc.org/suppdata/cc/b0/b003931o/ for electronic supplementary information (ESI): a detailed procedure of Scheme 1, Fig. 1 and 2, absorption spectra of 1, 5, 6, 7 and C60, and fluorescence spectrum of 1a.

Abstract

A combination between seemingly attractive carboranes and fullerene through an ethynyl π-system (compounds 1a–c) gives unexpectedly high β-values, thereby providing a guideline that in certain cases a seemingly A–A system becomes a promising complementary combination for obtaining high hyperpolarizability; the β values of 1a, 1b and 1c were 346, 483, and 1189 × 10⁻³⁰ esu, respectively.