Diphenyl derivatives of anthracene (DPA) have attracted extensive research interest in recent time due to their prospective application in organic light emitting diode (OLED) and other optoelectronic devices. Systematic investigation on the influence of phenyl substitution on optical properties of anthracene is lacking, even though the positions of phenyl substitution in the anthracene moiety are expected to alter the molecular interaction and molecular packing in solid state, having impact on photophysics and excitonic properties of these materials. In present work, we have investigated photophysics of three DPA derivatives namely, 2,6-diphenylanthracene, 1,8-diphenylanthracene and 9,10-diphenylanthracene in their nanoaggregate form. Owing to different positions and different dihedral angles (relative to anthracene plane) of the phenyl substituents, crystalline packing and intermolecular interaction are significantly modulated, resulting in diverse photophysical properties in nanoaggregated state. We have discussed the role of phenyl substituents on the interplay of exciton - excimer photophysics and exciton diffusion properties of these anthracene derivatives in relation to their potential application in OLED and photovoltaic devices.

蒽的二苯衍生物（DPA）由于其在有机发光二极管（OLED）和其他光电设备中的前瞻性应用，最近引起了广泛的研究兴趣。缺乏对苯取代对蒽的光学性质的影响的系统研究，即使预期蒽部分中苯取代的位置会改变固态下的分子相互作用和分子堆积，也会影响这些化合物的光物理性质和激子性质。材料。在目前的工作中，我们研究了三种DPA衍生物的光物理性质，它们分别是纳米聚集体形式的2,6-二苯基蒽，1,8-二苯基蒽和9,10-二苯基蒽。由于苯基取代基的不同位置和不同的二面角（相对于蒽平面），晶体堆积和分子间相互作用被显着调节，从而导致纳米聚集态的多种光物理性质。我们已经讨论了苯基取代基在这些蒽衍生物的激子-准分子光物理相互作用和激子扩散特性之间的相互作用，以及它们在OLED和光伏器件中的潜在应用。