Insights into Extended Coupled Polymethines through the Investigation of Dual UV-to-NIR Acidochromic Switches Based on Heptamethine-Oxonol Dyes - Archive ouverte HAL Access content directly
Journal Articles Chemical Science Year : 2023

Insights into Extended Coupled Polymethines through the Investigation of Dual UV-to-NIR Acidochromic Switches Based on Heptamethine-Oxonol Dyes

Abstract

A series of heptamethine-oxonol dyes featuring different heterocyclic end groups were designed with the aim to explore structure-properties relationships in π-extend coupled polymethines. These dyes can be stabilised under three different protonation states, affording dicationic derivatives with an aromatic core, cationic heptamethines, and zwitterionic bis-cyanine forms. The variation of the end groups directly impacts the absorption and emission properties and mostly controls reaching either a colourless neutral dispirocyclic species or near-infrared zwitterions. The acidochromic switching between the three states involves profound electronic rearrangements leading to notable shifts of their optical properties that were investigated using a parallel experiment-theory approach, providing a comprehensive description of these unique systems.
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hal-04345047 , version 1 (30-05-2024)

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Benjamin Mourot, Valérie Mazan, Mourad Elhabiri, Rudraditya Sarkar, Denis Jacquemin, et al.. Insights into Extended Coupled Polymethines through the Investigation of Dual UV-to-NIR Acidochromic Switches Based on Heptamethine-Oxonol Dyes. Chemical Science, 2023, ⟨10.1039/D3SC06126D⟩. ⟨hal-04345047⟩
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