Tetraaza[7]-[15]helicenes Synthesized by Two-Step Strategy: Length-Controlled Chiral π-Systems Exhibiting Amplified Circularly Polarized Luminescence.

Takashi Otani, Yuchen Wu, Kohei Ueda, Yuki Ikeda, Yuna Tada, Natsuna Kinoshita, Takanori Shibata

Abstract read

In one paragraph

Article in Angewandte Chemie (International ed. in English), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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0cells of the map it votes in

1citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

Enhancement of Dissymmetry Factors Through Axial Elongation of Hetero[n]helicenes.Angewandte Chemie (International ed. in English) · 2026
Article

4 · The record

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PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Takashi OtaniCourse of Chemical Engineering, National Institute of Technology Anan College, 265 Aoki, Minobayashi, Anan, Tokushima, 774-0017, Japan.

Yuchen WuSchool of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo, 169-8555, Japan.

Kohei UedaCourse of Chemical Engineering, National Institute of Technology Anan College, 265 Aoki, Minobayashi, Anan, Tokushima, 774-0017, Japan.

Yuki IkedaCourse of Chemical Engineering, National Institute of Technology Anan College, 265 Aoki, Minobayashi, Anan, Tokushima, 774-0017, Japan.

Yuna TadaCourse of Chemical Engineering, National Institute of Technology Anan College, 265 Aoki, Minobayashi, Anan, Tokushima, 774-0017, Japan.

Natsuna KinoshitaCourse of Chemical Engineering, National Institute of Technology Anan College, 265 Aoki, Minobayashi, Anan, Tokushima, 774-0017, Japan.

Takanori ShibataSchool of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo, 169-8555, Japan.ORCID https://orcid.org/0000-0003-4436-8264

Funding

JSPS KAKENHI 22K05087

6 · The paper itself

Abstract

Helicenes are chiral π-conjugated molecules whose properties strongly depend on their lengths. Systematic studies of these compounds have been limited by synthetic challenges. Here we report a concise two-step strategy (defined as the helicene-forming sequence from aminohelicene precursors) to access a homologous series of tetraaza[7]-[15]helicenes. Optical spectra converge beyond [11]H, defining a conjugation ceiling, while chiroptical responses amplify sharply, yielding |g

Indexed as

AzahelicenesChiroptical propertiesCircularly polarized luminescenceHelicenesπ‐Conjugated materials

Identifiers

PMID41509001

DOI10.1002/anie.202524463

PMCPMC13023689

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.