1,6-Diaminoperylene bisimide with a highly twisted perylene core

Journal of Chemical Sciences

HSING-YANG TSAI¹  FANG-YUN CHIEN¹  CHE-WEI CHANG¹  KEW-YU CHEN¹  JIUN-WEI HU¹ 

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关键词: Perylene bisimides;    x-ray diffraction;    axial chirality;    density functional theory.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

1,6-Diaminoperylene bisimide (1) was synthesized and characterized by single-crystal X-raydiffraction. To the best of our knowledge, this is the first time that the structure of 1,6-disubstituted perylene bisimide has been reported. The crystal belongs to triclinic, space group P-1, with a = 10.3966(10), b = 15.3398(16), c = 16.8495(17) Å, α = 79.490(4)◦, β = 87.055(3)◦, γ = 79.423(3)◦, and Z = 2. Compound1 possesses two intramolecular C–H· · ·N hydrogen bonds, which generate two S(6) ring motifs. The central perylene core of 1 is twisted with dihedral angles of 19.48(2)◦ and 19.50(2)◦; this twist configuration induces the axial chirality in this family of perylene bisimide chromophores. Density functional theory (DFT) calculations also show that the core twist angles of 1,6-diaminoperylene bisimide are larger than those of 1,7-diaminoperylene bisimide, which may account for the fact that the 1,7-regioisomer has a more extended effective conjugation length than the 1,6-regioisomer.

【 授权许可】

Unknown