Quinazoline heterocyclic derivative as well as preparation method and application thereof

The invention discloses a quinazoline heterocyclic derivative as well as a preparation method and application thereof, and relates to the field of organic luminescent materials. According to the present invention, quinazoline-containing benzopyrimidine and pyridopyrimidine units are adopted as receptors, phenyl and pyridyl are adopted as pi bridges, and dimethyl acridine or phenoxazine is adopted as a donor, such that the small organic molecule with the D-pi-A-pi-D structure is constructed, the pi-pi accumulation is reduced through the twisted D-pi-A structure so as to improve the stability of the structure; and meanwhile, by controlling the torsion angle between the donor and the acceptor, the distribution of the front line molecular orbits is adjusted, the photophysical properties of the material are improved, and the compound is particularly suitable for organic light-emitting material devices. 本发明公开了一种喹唑啉杂环衍生物及其制备方法和应用，涉及有机发光材料领域。本发明利用含有喹唑啉的苯并嘧啶与吡啶并嘧啶单元作为受体，用苯基以及吡啶基作为π桥，以二甲基吖啶或吩噁嗪作为给体，构建出具有D-π-A-π-D结构的有机小