A Phenylene‐Based Light‐Emitting Polymer: Atums Green. Issue 1 (11th November 2022) - Mehreen, Tanisha
Abstract: This work synthesizes a green‐fluorescent conjugated polymer and performs basic photophysical characterization of this new material. Atums Green [1] is synthesized by a Suzuki cross‐coupling polymerization reaction between isostructural dibromo and diboronic acid monomers and is structurally characterized by nuclear magnetic resonance and gel permeation chromatography. The polymer consists of an alkoxy‐substituted 1, 4‐bis((E)‐styryl)benzene repeating unit with molecular weight up to Mn = 50 kDa relative to polystyrene. Atums Green shows a strong green fluorescence maximized at ≈500 nm in chloroform and tetrahydrofuran solutions, with an absolute quantum efficiency as high as 98%. The photobleaching dynamics and time‐resolved photoluminescence (TRPL) are measured both in solutions and in solid films. Finally, solution‐based lasing is demonstrated in a bulk lasing cavity and in a cylindrical microcavity. Lasing emission is readily achieved in both formats, indicating that Atums Green has excellent emission characteristics, and further suggesting that it may present a viable green‐emitting conjugated polymer materials system for light emission applications. Abstract : A new, high‐efficiency green‐emitting fluorescent polymer called Atums Green is synthesized. Its fundamental optical properties and lasing character are measured and analyzed. This polymer may serve as an interesting and relatively easy‐to‐synthesize alternative to conventional green fluorescent polymers.