Fluorinated naphthalocyanines displaying simultaneous reverse saturable absorption at 532 and 1064 nm

The new materials of napthalocyanines (Nc), 2b,2c,and 3, exhibit optical limting properties at both 532 and 1064 nm when irradated with nanosecond pulse lasers. These compounds show high transparency over a wide range in the UV-vis region when their CS 2 solutions have a linear transmission of 75 percent at 1064 nm. This property makes the use of this class of materials in optical limiters operating in both the UV-vis and near infra red (NIR) regions feasible. It was found that the results can open new applications for the Nc-based materials in the fields of optical limiting and sensor protection.