Perylenetetracarboxy-3,4:9,10-diimide derivatives with large two-photon absorption activity
作者:Eleonora Garoni、Filippo Nisic、Alessia Colombo、Simona Fantacci、Gianmarco Griffini、Kenji Kamada、Dominique Roberto、Claudia Dragonetti
DOI:10.1039/c8nj03216e
日期:——
perylenetetracarboxy-3,4:9,10-diimides, bearing 2,6-diisopropylphenyl groups at the imide positions and 4-(R-ethynyl)phenoxy moieties (R = 4,7-di(2-thienyl)benzo[c][1,2,5]thiadiazole (P2), pyrene (P3) or pyrene-CH2OCH2 (P4)) at the four bay positions, were prepared, along with the known related derivative (R = phenyl (P1)), and well characterized. They have large two-photon absorption (TPA) cross-sections (σ2),
三个新的per四羧基-3,4:9,10-二酰亚胺,在酰亚胺位置带有2,6-二异丙基苯基和4-(R-乙炔基)苯氧基部分(R = 4,7-二(2-噻吩基)苯并[制备了四个间隔位置的c ] [1,2,5]噻二唑(P2),pyr(P3)或pyr-CH 2 OCH 2(P4)),以及已知的相关衍生物(R =苯基(P1)),并具有良好的特征。它们具有大的双光子吸收(TPA)截面(σ 2),如由Z扫描技术确定的,被与达到最高值P2其带有一个平面π-离域供体部分。P3的特征在于较高的σ 2个不是两个值P1,如预期的施主芘部分相对于苯基,具有较高的π共轭P4,由于柔性和非共轭CH存在2 OCH 2之间桥compound和乙炔基片段在后一个化合物中。通过DFT模型对P1-P4的分子几何结构进行了优化,显示出在P2和P3中,由于bay和噻吩基团的π-π相互作用,海湾取代基被堆叠起来。P1–P4的LUMO原子具有