Just my type: A series of pyrene derivatives were synthesized. In contrast with 1,6-position substitution, 1,8-position substitution had smaller dihedral angles and facilitated large conjugation and intermolecular stacking. The dicyanovinylene substitution strengthened the coplanarity and enhanced π-conjugated systems. The lowest unoccupied molecular orbital (LUMO) energy level was located deeply and they may be promising candidates of n-type semiconductors.

中文翻译：

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Pro衍生物作为有前途的n型半导体的发展：合成，结构和光谱性质。

只是我的类型：合成了一系列of衍生物。与1,6-位取代相反，1,8-位取代具有较小的二面角，并促进了大的共轭和分子间堆积。双氰基亚乙烯基取代增强了共面性并增强了π共轭体系。最低的未占据分子轨道（LUMO）能级位于很深的地方，它们可能是n型半导体的有希望的候选者。