• HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
Tuesday, September 30, 2025
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News Chemistry

‘Planar and curved’ pyrrole-fused azacoronenes

Bioengineer by Bioengineer
April 23, 2021
in Chemistry
Reading Time: 2 mins read
0
IMAGE
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram

Effect of 3D sructures on π-electron functions

IMAGE

Credit: Graduate School of Science and Engineering, Ehime University

Recently study on synthetic approaches toward polycyclic aromatic hydrocarbons (PAHs) as graphene with a well-defined structure has attracted much attention. A research group in Ehime University has been studying the synthesis and fundamental properties of pyrrole-fused azacoronene (HPHAC), a nitrogen-containing PAH. HPHACs are composed of electron-rich pyrroles, which are easily oxidized, and their dicationic species in particular exhibit unique features such as global aromaticity based on macrocyclic π-conjugation. However, all the compounds reported so far have bulky substituents at the periphery of the HPHAC skeleton, and thus the characterization of the physical properties of the pristine HPHAC itself or the π-electron function based on π-π interactions has not been possible.

In this study, the group has synthesized two new derivatives, one with alkyl groups at the periphery of the HPHAC skeleton and the other with concave π-planes above and below the HPHAC skeleton. The HPHAC with alkyl groups was found to be more readily oxidized than the compounds previously reported and to exhibit stable redox properties. In addition, reflecting its planar structure, the HPHAC forms an alternating stacked column structure with electron-deficient π-electron compounds. On the other hand, the HPHAC with an extended π-electron system exhibits an unusual π-electron function with a double concave surface. Reflecting its shape, this electron-rich HPHAC strongly interacts with spherical fullerene, which is an electron-deficient π-electron compound. A comparison of the global aromaticities of the two dicationic species reveals that the double-concave HPHAC possesses weaker aromaticity.

Recent research on π-electron materials has led to the synthesis of three-dimensional structures, such as bowl- and saddle-shaped compounds, instead of the conventional planar ones. However, there have been few studies focusing on the π-electron function of the 3D structure, except for clarifying its structural features using single crystal X-ray structure analysis. By elucidating the detailed structure-property relationships between analogues that share the same skeleton but have different 3D structures, new design guidelines can be obtained for organic electronics and spintronics materials involving π-electron functions.

###

Media Contact
Masayoshi Takase, Hidemitsu Uno
[email protected]

Original Source

https://pubs.acs.org/doi/10.1021/acs.joc.0c02825, https://pubs.acs.org/doi/10.1021/acs.joc.0c03042

Related Journal Article

http://dx.doi.org/10.1021/acs.joc.0c02825

Tags: Chemistry/Physics/Materials SciencesMaterialsMolecular Physics
Share12Tweet8Share2ShareShareShare2

Related Posts

blank

Ultrafast Polaron Formation in NaTaO3 Reveals Instant Stabilization of Positive Charges in Key Solar Fuel Catalyst

September 30, 2025
blank

New Supramolecular Elastomer with Boron-Based Dynamic Bonds Delivers Superior Mechanical Strength and Chemical Recovery

September 30, 2025

New Study Uncovers Why Modern Proteins Were Selected by Nature

September 29, 2025

Global Call to Advance Robust and Reproducible Polyphenol Research to Launch Next October in Malta at Polyphenols Applications World Congress and Iprona

September 29, 2025
Please login to join discussion

POPULAR NEWS

  • New Study Reveals the Science Behind Exercise and Weight Loss

    New Study Reveals the Science Behind Exercise and Weight Loss

    87 shares
    Share 35 Tweet 22
  • Physicists Develop Visible Time Crystal for the First Time

    73 shares
    Share 29 Tweet 18
  • How Donor Human Milk Storage Impacts Gut Health in Preemies

    59 shares
    Share 24 Tweet 15
  • Scientists Discover and Synthesize Active Compound in Magic Mushrooms Again

    56 shares
    Share 22 Tweet 14

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Recent News

Optimized Features Enhance Lithium-Ion Battery Lifespan Predictions

Neuron-Reactive KIR+CD8+ T Cells Drive Autoimmune Encephalitis

Al/Y Co-Doping Boosts Na3V2(PO4)3 Cathode Performance

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 60 other subscribers
  • Contact Us

Bioengineer.org © Copyright 2023 All Rights Reserved.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

Bioengineer.org © Copyright 2023 All Rights Reserved.