Synthesis andChiroptical Properties of a Saddle-ShapedQuadruple Helicene with a Cyclooctatetrapyrrole Core

A quadruple helicene with a cyclooctatetrapyrrole core was synthesized via a simple Ullmann reaction. Its single-crystal structure exhibits a saddle shape. The compound shows fluorescence emission with λ<sub>em</sub> = 575 nm and good chiroptical properties, including a dissymmetric absorption factor (|<i>g</i><sub>abs</sub>|) of 5.84 × 10<sup>–3</sup> and a dissymmetric emission factor (|<i>g</i><sub>lum</sub>|) of 1.21 × 10<sup>–2</sup>.

Publication Details

Journal
Figshare
Published
2025-03-28
DOI
https://doi.org/10.1021/acs.orglett.5c00294.s001
Primary Topic
Synthesis and Properties of Aromatic Compounds
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article
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Synthesis andChiroptical Properties of a Saddle-ShapedQuadruple Helicene with a Cyclooctatetrapyrrole Core

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Synthesis and Properties of Aromatic Compounds
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Synthesis andChiroptical Properties of a Saddle-ShapedQuadruple Helicene with a Cyclooctatetrapyrrole Core

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Abstract

A quadruple helicene with a cyclooctatetrapyrrole core was synthesized via a simple Ullmann reaction. Its single-crystal structure exhibits a saddle shape. The compound shows fluorescence emission with λ<sub>em</sub> = 575 nm and good chiroptical properties, including a dissymmetric absorption factor (|<i>g</i><sub>abs</sub>|) of 5.84 × 10<sup>–3</sup> and a dissymmetric emission factor (|<i>g</i><sub>lum</sub>|) of 1.21 × 10<sup>–2</sup>.

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Synthesis and Properties of Aromatic Compounds
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Synthesis andChiroptical Properties of a Saddle-ShapedQuadruple Helicene with a Cyclooctatetrapyrrole Core · Figshare (2025) | TGRS Research Map | TGRS