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Tetrameric and Hexameric Porphyrin Nanorings: Template Synthesis and Photophysical Properties
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-08-27 , DOI: 10.1021/jacs.0c07707
Chihiro Maeda 1 , Shoki Toyama 1 , Naoki Okada 1 , Kazuto Takaishi 1 , Seongsoo Kang 2 , Dongho Kim 2 , Tadashi Ema 1
Affiliation  

Hexameric and tetrameric porphyrin nanorings, Z6·T6 and Z4·T4, were synthesized in 53% and 14% yields, respectively, by the Sonogashira-type self-oligomerization of porphyrin monomer 1 using hexadentate template T6 and tetrapyridylporphyrin template T4. Template-free nanorings Z6 and Z4 were also prepared. The femtosecond transient absorption measurements revealed fast excitation energy hopping (EEH) along these nanorings with hopping rates of 2-5 ps. Treatment of Z6 with chiral template CT6 gave Z6·CT6 showing circular dichroism (CD) and circularly polarized luminescence (CPL) in the absorption and fluorescence regions of Z6, respectively, which indicates chirality transfer from CT6 to Z6.

中文翻译:

四聚体和六聚体卟啉纳米环:模板合成和光物理特性

六聚和四聚卟啉纳米环,Z6·T6 和 Z4·T4,分别以 53% 和 14% 的产率,通过使用六齿模板 T6 和四吡啶基卟啉模板 T4 的卟啉单体 1 的 Sonogashira 型自低聚反应合成。还制备了无模板纳米环 Z6 和 Z4。飞秒瞬态吸收测量揭示了沿着这些纳米环的快速激发能量跳跃 (EEH),跳跃率为 2-5 ps。用手性模板 CT6 处理 Z6 后,Z6·CT6 在 Z6 的吸收区和荧光区分别显示出圆二色性 (CD) 和圆偏振发光 (CPL),这表明从 CT6 到 Z6 的手性转移。
更新日期:2020-08-27
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