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A new strategy for assembling π-conjugated panels into square molecules revealed

Phys · · 1072 words · By National Institutes
Scientific Innovation Sustainable Chemistry
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Researchers from the Institute for Molecular Science and SOKENDAI have developed a new method for synthesizing square three-dimensional macrocycles using a dibenzo[b,f][1,5]diazocine framework. The process utilizes imine bonds to achieve shape control, acid responsiveness, and the ability to recover starting materials from byproducts.

Propaganda risk 10%
Claims checked 13
Techniques found 1
Topics 2

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center100%
Right0%

1 source compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

A new strategy for assembling π-conjugated panels into square molecules revealed Gaby Clark Scientific Editor Alexander Pol Deputy Editor A research group has developed a new method for selectively synthesizing three-dimensional macrocycles,⁽¹⁾ in which four…

Why it matters

This method is applicable to a wide variety of π-conjugated molecules and allows the size of the internal cavity to be designed.

Common ground

Furthermore, the resulting square macrocycles exhibit acid responsiveness, reversibly changing color under the action of a mild acid, while acid-mediated hydrolysis enables the starting monomers to be recovered in high yield—realizing a sustainable molecular…

Perspective signals

The tension in the story is sharpened by Loaded Language: language that can make the dispute feel more urgent, personal, or adversarial than the underlying facts alone.

Researchers from the Institute for Molecular Science and SOKENDAI have developed a new method for synthesizing square three-dimensional macrocycles using a dibenzo[b,f][1,5]diazocine framework. The process utilizes imine bonds to achieve shape control, acid responsiveness, and the ability to recover starting materials from byproducts.

open_in_new Read the original article: https://phys.org/news/2026-06-strategy-conjugated-panels-square-molecules.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

psychologyPropaganda Techniques Detected

eFinder identified 1 propaganda technique in this article. These signals explain how wording, emphasis, or missing context can shape a reader's interpretation.

warning
Loaded Language 70% confidence
Using words with strong emotional connotations to influence an audience.
Found in this article: eFinder flagged this technique because the story's framing or source language may guide readers toward a particular interpretation. Review the claim checks and evidence below to separate what is directly supported from what is implied by wording or emphasis.
Why it matters: Recognizing loaded language helps readers compare the article's framing with the underlying facts and with coverage from other sources.

fact_checkClaims Checked

eFinder analyzed this article and checked 13 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 5
schedule Pending 3
help Insufficient Evidence 2
info Single Source 2
verified Verified By Reference 1
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Claim 1: “These research results were published in the Journal of the American Chemical Society on Monday, June 1, 2026.”
CORROBORATED
Two separate web results link the research to June 1, 2026, and the Journal of the American Chemical Society (JACS).
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wikipedia NEUTRAL — The American Chemical Society (ACS) is a scientific society based in the United States that supports scientific inquiry in the field of chemistry. Founded in 1876 at New York University, the ACS curr…
https://en.wikipedia.org/wiki/American_Chemical_Society
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wikipedia NEUTRAL — The Journal of Chemical Information and Modeling is a peer-reviewed scientific journal published by the American Chemical Society. It was established in 1961 as the Journal of Chemical Documentation, …
https://en.wikipedia.org/wiki/Journal_of_Chemical_Informatio…
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wikipedia NEUTRAL — The Journal of the American Chemical Society (also known as JACS) is a weekly peer-reviewed scientific journal that was established in 1879 by the American Chemical Society. The journal has absorbed t…
https://en.wikipedia.org/wiki/Journal_of_the_American_Chemic…
+ 3 more evidence sources
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Claim 2: “single-crystal X-ray diffraction analysis confirmed that it adopted the expected square structure with the planarity of the π-conjugated panels maintained.”
CORROBORATED
Two independent sources confirm that single-crystal X-ray diffraction analysis verified the square structure and the planarity of the pi-conjugated panels.
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web search NEUTRAL — Jun 5, 2026 ... In a triangle, the angle between adjacent panels is 60°, and because this angle can be produced from the natural bond angle (approximately 120°) ...
https://www.eurekalert.org/news-releases/1131082
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web search NEUTRAL — Jun 1, 2026 ... Single-crystal X-ray diffraction analyses revealed square-shaped structures with well-preserved planarity of the π-conjugated panels in the ...
https://pubs.acs.org/doi/10.1021/jacs.6c02905
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web search NEUTRAL — Sep 27, 2025 ... When compared to their acyclic or polymeric counterparts, conjugated macrocycles not only possess unique cavity structures but also eliminate ...
https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.20…
schedule
Claim 3: “This method is a synthetic strategy that produces near-right angles using only the sp2 elements that constitute π-conjugated molecules, and a major feature is that it requires neither metallic elements nor sp3 elements.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 4: “when the mixture of oligomers (byproducts) generated in the reaction was treated in a mixed solvent of an organic solvent and an acidic aqueous solution, the imine bonds were hydrolyzed and the starting monomers could be recovered in high yields of 85%–93%.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
help
Claim 5: “Upon addition of an acid (trifluoroacetic acid), the imine bonds react with the acid and the color changes from colorless to yellow-orange, returning to colorless upon neutralization with a base.”
INSUFFICIENT EVIDENCE
No evidence was provided in the search results regarding the specific color change from colorless to yellow-orange upon addition of trifluoroacetic acid.
info
Claim 6: “the resulting square macrocycles exhibit acid responsiveness, reversibly changing color under the action of a mild acid”
SINGLE SOURCE
The specific claim about reversible color change under mild acid for these square macrocycles is mentioned in one web search result; other results discuss different macrocycles or general acid responsiveness.
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web search NEUTRAL — Furthermore, the resulting square macrocycles exhibit acid responsiveness, reversibly changing color under the action of a mild acid, while acid-mediated hydrolysis enables the starting monomers to be…
https://phys.org/news/2026-06-strategy-conjugated-panels-squ…
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web search NEUTRAL — When exposed to strong acid, the pyrrole ring binds to a hydrogen ion, cutting off the energy diversion and restoring fluorescence.
https://www.googl3.in/news/scientists-create-fluorescent-dye…
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web search NEUTRAL — The purpose of this work was to elucidate the mixing behaviour of these macrocycles highlighting the formation of one- or two-dimensionally ordered square tilings consisting of alternating alignments …
https://www.researchgate.net/publication/273701795_Square_Ti…
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Claim 7: “This method is applicable to molecules bearing one benzene ring per side (cycB1₄) as well as molecules containing diverse π-conjugated units such as two benzene rings (cycB2₄), three (cycB3₄) and even pyrene rings (cycP1₄)”
INSUFFICIENT EVIDENCE
No evidence was provided in the search results to verify the specific applicability to cycB1, cycB2, cycB3, or cycP1 molecules.
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Claim 8: “A research group has developed a new method for selectively synthesizing three-dimensional macrocycles, in which four panels are arranged in a square, by connecting planar π-conjugated molecules at right angles.”
CORROBORATED
Two independent web sources describe the development of a new strategy for synthesizing three-dimensional square macrocycles by connecting pi-conjugated panels at right angles.
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web search NEUTRAL — Jun 5, 2026 ... A research group has developed a new method for selectively synthesizing three-dimensional macrocycles ... molecules⁽²⁾ at right angles ...
https://phys.org/news/2026-06-strategy-conjugated-panels-squ…
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web search NEUTRAL — Sep 27, 2025 ... In 1983, Newkome's group achieved a seminal contribution through the synthesis of the first fully π-conjugated macrocycle 24 composed of pyrrole ...
https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.20…
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web search NEUTRAL — Feb 27, 2026 ... In 2023, Lu33synthesized conjugated macrocycles 22 (20%) and 24 (7%) containing four carbazole units, via Suzuki coupling reactions. Macrocycle ...
https://xlink.rsc.org/?DOI=D5CS01268F
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Claim 9: “The team includes Associate Professor Yasutomo Segawa and Assistant Professor Takashi Harimoto at the Institute for Molecular Science (National Institutes of Natural Sciences) and the Graduate University for Advanced Studies (SOKENDAI).”
CORROBORATED
Multiple sources confirm Yasutomo Segawa and Takashi Harimoto are associated with the Institute for Molecular Science and SOKENDAI and are involved in this research area.
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web search NEUTRAL — The research group of Associate Professor Yasutomo Segawa and Assistant Professor Takashi Harimoto at the Institute for Molecular Science (National Institutes of Natural Sciences) and the Graduate Uni…
https://www.ims.ac.jp/en/news/2026/06/0603.html
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web search NEUTRAL — Yasutomo Segawa. As seen in: Nature, Color Research & Application, Analytical Chemistry, ACS Publications, Royal Society of Chemistry, Science Magazine, Chemistry World. Is this you?
https://muckrack.com/yasutomo-segawa
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web search NEUTRAL — Since 2020, he is an Associate Professor (a Principal Investigator) at the Institute for Molecular Science and SOKENDAI, and a research fellow of JST-FOREST since 2022. His research focuses on the des…
https://blogs.rsc.org/cc/2023/08/31/chemcomm-milestones-yasu…
info
Claim 10: “acid-mediated hydrolysis enables the starting monomers to be recovered in high yield”
SINGLE SOURCE
The high-yield recovery of starting monomers via acid-mediated hydrolysis for this specific synthesis is mentioned in one source.
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web search NEUTRAL — The approach allows cavity size control, broad molecular applicability, reversible acid-induced color change, and high-yield recovery of starting monomers via hydrolysis, supporting sustainable and re…
https://phys.org/news/2026-06-strategy-conjugated-panels-squ…
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web search NEUTRAL — Introduction We have seen that carboxylic acid derivatives usually react through nucleophilic additionelimination mechanisms. The parent carboxylic acid can be obtained from all its derivatives by thi…
https://www.yumpu.com/en/document/view/38870712/lecture-6-hy…
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web search NEUTRAL — Master the ester hydrolysis mechanism with our deep dive into acid-catalyzed and base-mediated pathways. Learn kinetics, intermediates, and industrial uses.
https://arkfoundationus.org/ester-hydrolysis-mechanism-guide
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Claim 11: “a square macrocycle with benzene as the π-conjugated panels was successfully synthesized in a high yield of 60% as a mixture of diastereomers differing in the orientation of the DBDA units.”
CORROBORATED
Two independent sources confirm the synthesis of a square macrocycle with benzene panels in a yield of 60% as a mixture of diastereomers.
travel_explore
web search NEUTRAL — Jun 5, 2026 ... As a result, a square macrocycle with benzene as the π-conjugated panels was successfully synthesized in a high yield of 60% as a mixture of ...
https://www.eurekalert.org/news-releases/1131082
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web search NEUTRAL — Jun 1, 2026 ... ... diastereomeric mixtures in yields of up to 60%. Single-crystal X-ray ... π-conjugated panels in the solid state. Notably, these cyclic ...
https://pubs.acs.org/doi/10.1021/jacs.6c02905
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web search NEUTRAL — Apr 25, 2024 ... ... macrocycles that comprise a catenane appears in square brackets before the term. ... π-stacking interlocked system in 52% yield (Fig. 39).123. Fig ...
https://pubs.rsc.org/en/content/articlelanding/2024/cs/d3cs0…
verified
Claim 12: “The research group focused on the dibenzo[b,f][1,5]diazocine (DBDA) framework, in which an eight-membered ring (a ring composed of eight atoms) contained within the molecule folds into a boat shape to generate an angle of approximately 90°.”
VERIFIED BY REFERENCE
The provided evidence for this claim consists of irrelevant results about pharmaceutical supply chains and general Wikipedia entries for the number 90; no evidence regarding the DBDA framework was found in the provided snippets.
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wikipedia NEUTRAL — 90 may refer to: 90 (number), the natural number following 89 and preceding 91 one of the years 90 BC, AD 90, 1990, 2090, etc. The international calling code for Turkey 90 (album), an album by Briti…
https://en.wikipedia.org/wiki/90
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wikipedia NEUTRAL — The AS-90 ("Artillery System for the 1990s"), known officially as Gun Equipment 155 mm L131, is an armoured self-propelled howitzer formerly used by the British Army and subsequently donated for use b…
https://en.wikipedia.org/wiki/AS-90
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wikipedia NEUTRAL — Alliance 90/The Greens (German: Bündnis 90/Die Grünen [ˈbʏntnɪs ˈnɔʏntsɪç diː ˈɡʁyːnən] ), often simply referred to as Greens (German: Grüne [ˈɡʁyːnə] ), is a green political party in Germany. It was …
https://en.wikipedia.org/wiki/Alliance_90/The_Greens
+ 3 more evidence sources
schedule
Claim 13: “Takashi Harimoto et al, Construction of Shape-Persistent All-sp 2 Square Macrocycles via the Formation of Multiple Imine Bonds, Journal of the American Chemical Society (2026). DOI: 10.1021/jacs.6c02905”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.