Spectroscopic and nonlinear optical properties of the four positional isomers of 4α-(4-tert-butylphenoxy)phthalocyanine

Abstract

The spectroscopic and nonlinear optical properties of the positional isomers of metal free 4α-(4-tert-butylphenoxy) phthalocyanine are presented. Second order nonlinear polarizability (β), imaginary hyperpolarizability (Im(γ)) and imaginary susceptibility (Im[χ⁽³⁾]) values were determined for the four positional isomers. The measured β values of the four isomers displayed the following trend, C_4h (34.0 × 10⁻⁵ m MW⁻¹) > D_2h (28.8 × 10⁻⁵ m MW⁻¹) > C_2v (22.8 × 10⁻⁵ m MW⁻¹) > C_s (13.7 × 10⁻⁵ m MW⁻¹).