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author:

Huang, Yanxia (Huang, Yanxia.) [1] | Zhou, Laiyun (Zhou, Laiyun.) [2] | Zhang, Ruiying (Zhang, Ruiying.) [3] | Ding, Yeda (Ding, Yeda.) [4] | Shi, Dan (Shi, Dan.) [5] | Zhu, Lingyun (Zhu, Lingyun.) [6] | Lin, Lisen (Lin, Lisen.) [7] | Li, Yuanming (Li, Yuanming.) [8] | Wang, Qing (Wang, Qing.) [9]

Indexed by:

SCIE

Abstract:

Polycyclic aromatic hydrocarbons (PAHs) have attracted significant interest in material chemistry, particularly if they own extremely low band gaps and magnetic properties. However, challenges remain regarding the synthetic accessibility and energy saturation issues. In this study, we introduce NR-11, which consists of eleven aromatic rings in its main conjugation and is separately doped with two electron-rich nitrogen atoms. This unique structure imparts intriguing oxidation characteristics to NR-11. The cationic radical NR-11+center dot exhibits enhanced stability and demonstrates strong absorption in the range of 1250 nm to 3000 nm, peaking at 2570 nm. As a result, the optical energy gap of NR-11+center dot is one of the lowest reported to date. Additionally, X-ray crystal structure analysis reveals that NR-11+center dot displays unusual symmetry-broken charge separation. For the dication, variable-temperature NMR and variable-temperature EPR studies indicate that NR-112+ exhibits a high diradical character with a Delta ES-T of approximately -1 kcal/mol. Additionally, its spins are polarized at two ends of the PAH. Meanwhile, its strong absorption in the near-infrared II region suggests promise in photoacoustic (PA) conversion applications. This work underscores the significance of cationic species of extended long PAHs, highlighting their exceptional properties and potential applications.

Keyword:

Chichibabin structure diradical character low energy gap polycyclic aromatic hydrocarbons symmetry broken charge transfer

Community:

  • [ 1 ] [Huang, Yanxia]Fuzhou Univ, Fujian Prov Univ, Coll Chem, Key Lab Adv Carbon Based Funct Mat, Fuzhou 350108, Peoples R China
  • [ 2 ] [Zhang, Ruiying]Fuzhou Univ, Fujian Prov Univ, Coll Chem, Key Lab Adv Carbon Based Funct Mat, Fuzhou 350108, Peoples R China
  • [ 3 ] [Shi, Dan]Fuzhou Univ, Fujian Prov Univ, Coll Chem, Key Lab Adv Carbon Based Funct Mat, Fuzhou 350108, Peoples R China
  • [ 4 ] [Zhu, Lingyun]Fuzhou Univ, Fujian Prov Univ, Coll Chem, Key Lab Adv Carbon Based Funct Mat, Fuzhou 350108, Peoples R China
  • [ 5 ] [Lin, Lisen]Fuzhou Univ, Fujian Prov Univ, Coll Chem, Key Lab Adv Carbon Based Funct Mat, Fuzhou 350108, Peoples R China
  • [ 6 ] [Li, Yuanming]Fuzhou Univ, Fujian Prov Univ, Coll Chem, Key Lab Adv Carbon Based Funct Mat, Fuzhou 350108, Peoples R China
  • [ 7 ] [Zhou, Laiyun]Inner Mongolia Univ, Sch Chem & Chem Engn, 235 West Univ St, Hohhot 010021, Peoples R China
  • [ 8 ] [Ding, Yeda]Inner Mongolia Univ, Sch Chem & Chem Engn, 235 West Univ St, Hohhot 010021, Peoples R China
  • [ 9 ] [Wang, Qing]Inner Mongolia Univ, Sch Chem & Chem Engn, 235 West Univ St, Hohhot 010021, Peoples R China
  • [ 10 ] [Huang, Yanxia]Joint Sch Natl Univ Singapore, Fuzhou 350207, Peoples R China
  • [ 11 ] [Huang, Yanxia]Tianjin Univ, Int Campus Tianjin Univ, Fuzhou 350207, Peoples R China

Reprint 's Address:

  • [Li, Yuanming]Fuzhou Univ, Fujian Prov Univ, Coll Chem, Key Lab Adv Carbon Based Funct Mat, Fuzhou 350108, Peoples R China;;[Wang, Qing]Inner Mongolia Univ, Sch Chem & Chem Engn, 235 West Univ St, Hohhot 010021, Peoples R China

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Source :

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

Year: 2025

Issue: 13

Volume: 64

1 6 . 1 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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