Polyfluorenylacetylene for near-infrared laser protection: polymer synthesis, optical limiting mechanism and relationship between molecular structure and properties

Abstract

The incorporation of styryl/stilbene–fluorene into polyacetylenes not only endowed the polymers with novel near-infrared optical limiting properties based on a two-photon absorption mechanism but good solubility and high thermal stability.

Excited-state absorption for zinc phthalocyanine from linear-response time-dependent density functional theory

“…1 Optical-limiting materials show a strong attenuation of light transmission at high input intensities but have a very high transmittance for light at low input intensities. [2][3][4][5] These materials can be used to protect light-sensitive materials from damage by high intensity light sources. Reversed saturation absorption (RSA) is one of the most important non-linear optical properties for materials showing optical-limiting character.…”