The 3-(furan-2-yl)-2-(4-{[(2-hydroxy-5-methylphenyl)methylidene]amino}phenyl)prop-2-enenitrile (LAXYUI)), acting as a model, is a type of outstanding organic fluorophore. Using a transient absorption approach, the excitation relaxation behavior of LAXYUI in the monomolecular system and ordered crystals was identified. The polarization optical properties of LAXYUI crystals, including anisotropy of absorption and photoluminescence, polarization PL decay at different temperatures, and the evolution of optical anisotropy as a function of propagation length, are thoroughly investigated using a series of home-built polarization optical techniques. Our results can help people better understand the time- and space-dependent optical anisotropy that occurs in organic crystals, which will be important in the future to improve or broaden the performance of polarization optical systems based on organic crystals.

3-(呋喃-2-基)-2-(4-{[(2-羟基-5-甲基苯基)亚甲基]氨基}苯基)丙-2-烯腈(LAXYUI))作为模型，是一种出色的有机荧光团。使用瞬态吸收方法，鉴定了 LAXYUI 在单分子系统和有序晶体中的激发弛豫行为。使用一系列自制的偏振光学技术彻底研究了LAXYUI 晶体的偏振光学特性，包括吸收和光致发光的各向异性、不同温度下的偏振 PL 衰减以及光学各向异性随传播长度的变化。我们的研究结果可以帮助人们更好地理解有机晶体中发生的时间和空间依赖性光学各向异性，这对于未来改善或拓宽基于有机晶体的偏振光学系统的性能非常重要。