The development of advanced photonic materials exhibiting two-photon absorption (2PA) relies on nonlinear absorption chromophores with enhanced 2PA cross-sections and long-term photo- and thermal stability. Here, the authors report a dipolar carbene-metal-amide (CMA) with a 2PA cross-section up to 105 GM that exhibits third-order nonlinear optical properties — red two-photon–excited thermally activated delayed fluorescence with radiative rates of up to 2.1·106 s–1 — while maintaining excellent photostability.
- Ikechukwu D. Nwosu
- Lujo Matasović
- Alexander S. Romanov
