Two-dimensional aryl center-crossed cruciforms generally exhibit the strongly twisted conformation and the spatial separation of frontier molecular orbitals, which can render the emitters destructible packing structures and high solid-state fluorescence efficiency. In the current work, we design and synthesize a benzene-centered cruciform emitter (DOT) with two adjacent phenyloxadiazoles and two adjacent triphenylamines starting from commercially available chemicals. Single crystal analysis indicates that DOT molecules loosely pack together in a twisted conformation and weak inter-molecular interactions. Upon mechanical grinding, the crystalline DOT is changed into an amorphous state, accompanying with a remarkable (56 nm) mechanofluorochromism (MFC). In view of the crossed donor and acceptor structure and the strong solid-state fluorescence, the non-doped electroluminescence (EL) devices with the structures ITO/HATCN/NPB or TAPC/DOT/TPBi/LiF/Al are fabricated. The devices efficiently emit 500 nm green EL with the low turn on voltage of 2.7 V and the low efficiency roll-off. Thus, we have provided a feasible synthetic strategy for various isomers and analogues of fully aromatic benzene-centered D‒A cruciforms and demonstrated a new class of candidates for MFC and EL materials.

二维芳基中心交叉的十字形通常表现出强烈扭曲的构象和前沿分子轨道的空间分隔，这可以使发射体具有可破坏的堆积结构和高固态荧光效率。在当前的工作中，我们设计并合成了以苯为中心的十字形发射极（DOT），该发射体与两个相邻的苯并恶二唑和两个相邻的三苯胺都是从商业可得的化学品开始的。单晶分析表明，DOT分子以扭曲的构型和弱的分子间相互作用松散地堆积在一起。机械研磨后，结晶的DOT转变为非晶态，并伴有显着的（56 nm）机械荧光致变色（MFC）。鉴于供体和受体的结构相互交叉以及强大的固态荧光，制备了结构为ITO / HATCN / NPB或TAPC / DOT / TPBi / LiF / Al的非掺杂电致发光（EL）器件。器件以2.7 V的低导通电压和低效率的滚降有效发射500 nm的绿色EL。因此，我们为全芳香族苯为中心的D‒A十字形的各种异构体和类似物提供了一种可行的合成策略，并证明了MFC和EL材料的新型候选物。