Clamshell-type Bis-phthalocyanines as Color-Changing Optical Limiters: TDDFT Modeling of Electrically Induced Absorption for Real-Time Color Indication of Optical Limiter Efficiency in Nonlinear Laser Protection

Phthalocyanines have the potential to serve as visual colour indicators for the development of advanced optical limiters for laser protection, as demonstrated by the quantum chemical LR-TDDFT method.