Dicyclohepta[cd,ij]-s-indacene-Based Nonbenzenoid Polycyclic Hydrocarbons: Synthesis and Optoelectronic Properties
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Updated: Jun 6, 2025

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
Zeyi Li1, Huimin Zhao1, Yujia Liu1
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin 130012, People's Republic of China.
Abstract:
Two nonbenzenoid polycyclic hydrocarbons (PHs) bearing one or two dicyclohepta[cd,ij]-s-indacene (DCHI) units were successfully synthesized via palladium-catalyzed intramolecular cyclization. In contrast to the well-known indeno[1,2-b]fluorene skeleton, the as-formed DCHI substructures not only lead to their highly contorted conformations but also significantly contribute to their modulated aromatic structures and optoelectronic properties, such as decreased energy gaps, red-shifted light absorption, and multi-reversible oxidation activity, thus revealing the importance of such nonbenzenoid π extension.
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