Novel columnar mesogen with octupolar optical nonlinearities: synthesis, mesogenic behavior and multiphoton-fluorescence-free hyperpolarizabilities of subphthalocyanines with long aliphatic chains†

Abstract

Novel subphthalocyanines with long thioalkyl chains exhibit hexagonal columnar mesophases at room temperature; their inherent first hyperpolarizability values (β) measured by hyper-Rayleigh scattering (HRS) with fluorescence suppression are (189 ± 30) × 10^–30 esu at 1300 nm.