Commins Patrick, Al-Handawi Marieh B, Deger Caner, Polavaram Srujana, Yavuz Ilhan, Rezgui Rachid, Li Liang, Houk K N, Naumov Panče
Smart Materials Lab, New York University Abu Dhabi, PO Box 129188, Abu Dhabi, UAE.
Department of Physics, Marmara University, Istanbul 34722, Türkiye.
J Am Chem Soc. 2024 Jun 11;146(24):16540-8. doi: 10.1021/jacs.4c03190.
Emission from crystalline organic solids is often quenched by nonemissive energy-transfer deexcitation processes. While dispersion of fluorophores in polymers or other hosts has been used to enhance the emission intensity, this strategy results in randomization of guest orientation and optical losses at grain boundaries. Here, we report the doping of inherently nonemissive single crystals of anilinium bromide with three fluorescent organic molecules. The doping process equips the crystal with emission characteristics that tune from blue to deep orange. The emission intensity can be reversibly modulated by ferroelastic twinning, which causes the material to function as a multiemissive force sensor. This approach opens up new pathways in the manipulation of emissive properties in organic crystals and may have substantial implications for optoelectronic devices and sensors.
结晶有机固体的发射通常会被非发射性的能量转移去激发过程淬灭。虽然将荧光团分散在聚合物或其他主体中已被用于增强发射强度，但这种策略会导致客体取向随机化以及晶界处的光学损耗。在此，我们报告了用三种荧光有机分子对溴化苯胺铵的固有非发射单晶进行掺杂。掺杂过程使晶体具备了从蓝色到深橙色可调的发射特性。发射强度可通过铁弹性孪晶进行可逆调制，这使得该材料能够作为一种多发射力传感器发挥作用。这种方法为有机晶体发射特性的操控开辟了新途径，可能对光电器件和传感器产生重大影响。
