Kalra Usha, Hanson James E
Department of Chemistry and Biochemistry, Seton Hall University, South Orange, New Jersey 07079, United States.
ACS Polym Au. 2024 Nov 8;4(6):487-491. doi: 10.1021/acspolymersau.4c00044. eCollection 2024 Dec 11.
Unusual photophysical and scattering behavior is described for hyperbranched poly(phenylene sulfide) materials. These materials show interactions between the π systems of the aromatic monomer units in both ground and excited states, resulting in broad ranges for absorption and emission of light. The materials also display unusual scattering behavior; this is attributed to enhanced scattering by delocalized excited states resulting from the monomer unit interactions. This enhanced scattering is seen in the resonance Rayleigh scattering and second order scattering spectra. The ability to use these materials to construct a switch based on photoinduced scattering is demonstrated: application of ∼400 nm laser light increased scattering of 700 nm light by approximately 20%.
描述了超支化聚苯硫醚材料异常的光物理和散射行为。这些材料在基态和激发态下均显示出芳族单体单元的π体系之间的相互作用，导致光吸收和发射的范围很宽。这些材料还表现出异常的散射行为；这归因于单体单元相互作用导致的离域激发态增强了散射。这种增强的散射在共振瑞利散射和二阶散射光谱中可见。证明了使用这些材料构建基于光致散射的开关的能力：施加约400 nm的激光使700 nm光的散射增加了约20%。
