Effects of the (Trialkyl)ammonium Structures in (Ammonio)amidyl Groups on π-Electron Donating Ability and Thermal Stability: Experimental and Computational Study

Q: What type of study is this?

This is a Experiments study (also classified as: Quantum Chemical Calculations).

Hikaru Fujita; Takanari Arai; Hiroki Muraya; Yuna Matsuyama; Munetaka Kunishima

doi:10.1248/cpb.c25-00260

August 28, 2025Chemical and Pharmaceutical BulletinOpen Access

Effects of the (Trialkyl)ammonium Structures in (Ammonio)amidyl Groups on π-Electron Donating Ability and Thermal Stability: Experimental and Computational Study

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Key Points

AA-substituted p-nitrobenzenes showed improved π-electron donating ability, revealing crucial structural influences.
Quantum chemical calculations confirmed favorable thermal stability for quinuclidinio amidyl groups in the studied compounds.
Various ammonium structures were evaluated, demonstrating significant differences in their electronic properties.
The findings highlight potential applications of AA groups in designing more efficient π-conjugated materials.

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Implication

Experimental and computational analysis uncovered how ammonium structures influence π-electron-donating ability and thermal stability in p-nitrobenzenes.

Abstract

The (ammonio)amidyl (AA) groups, with the general structure of R3N+N--, represent a new class of π-electron-donating groups for the benzene-based π-conjugated molecules. This study investigated AA-substituted p-nitrobenzenes to assess the effects of acyclic, monocyclic, and bicyclic ammonium structures in the AA groups on the π-electron-donating ability and thermal stability of the structure. Quantum chemical calculations were performed that supported the experimentally observed favorable properties of the (quinuclidinio)amidyl (QA) group.

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Fujita et al. (2025) studied this question.

synapsesocial.com/papers/68bb3ee82b87ece8dc9571cd https://doi.org/10.1248/cpb.c25-00260

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Effects of the (Trialkyl)ammonium Structures in (Ammonio)amidyl Groups on π-Electron Donating Ability and Thermal Stability: Experimental and Computational Study

Key Points

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Implication

Abstract

Discussion

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Effects of the (Trialkyl)ammonium Structures in (Ammonio)amidyl Groups on π-Electron Donating Ability and Thermal Stability: Experimental and Computational Study

Key Points

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Abstract

Discussion

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