Effect of Organic Bases on Fluorescence Quenching Behaviors and Acid–Base Responsivity of Coumarin‐Based π‐Conjugated Polymers Compared With 3,7‐Dibromo‐4‐Methylcoumarin and 3,7‐Bis(Phenylethynyl)‐4‐Methylcoumarin DOI
Yuya Kaneko, Aohan Wang

Journal of Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 29, 2024

ABSTRACT π‐Conjugated polymers containing coumarin backbone in the main chain show acid–base responsive fluorescence. The α‐pyrone ring unit undergoes hydrolysis by inorganic bases and triggers change of expanded π‐conjugated system, resulting reversible fluorescence on/off switching, dual‐colored halochromic fluorescence, alkali metal ion recognition. We assume that form complexes with ions during hydrolysis. In this study, we investigated quenching behaviors responsivity 3,7‐dibromo‐4‐methylcoumarin, 3,7‐bis(phenylethynyl)‐4‐methylcoumarin (model compound), two types coumarin‐based addition organic for comparison. Consequently, model compound demonstrated remarkably switching behaviors, highlighting significant role metal‐free HCl aqueous solution facilitating ring‐opening closing properties. notable reversibility specifically PL intensity. These results are expected to enhance our understanding how recognized polymers.

Language: Английский

19F NMR-Based Lithium Sensors Using 19F-Labeled Aza-Crown Ethers: Regioisomeric and Substituent Effects DOI

Donghyeon Lee,

Yanchuan Zhao, Byungjin Koo

et al.

Dyes and Pigments, Journal Year: 2025, Volume and Issue: unknown, P. 112762 - 112762

Published: March 1, 2025

Language: Английский

Citations

0
Fluorescence Quenching Behaviors and Acid-Base Responsibility of 3,7-Dibromo-4-Methylcoumarin, 3,7-Bis(Phenylethynyl)-4-Methylcoumarin, and Coumarin-Based Π-Conjugated Polymers by the Addition of Organic Bases DOI
Yuya Kaneko, Aohan Wang

Published: Jan. 1, 2024

Language: Английский

Citations

0
AIE-active fluorescence emitters containing tetraphenylethylene and α-cyanostilbene with mechanochromism and photo-responsive behaviors DOI

Haoyu Ma,

Xiaoling Niu,

Wenlong Qu

et al.

Journal of Luminescence, Journal Year: 2024, Volume and Issue: 277, P. 120973 - 120973

Published: Nov. 6, 2024

Language: Английский

Citations

0
Effect of Organic Bases on Fluorescence Quenching Behaviors and Acid–Base Responsivity of Coumarin‐Based π‐Conjugated Polymers Compared With 3,7‐Dibromo‐4‐Methylcoumarin and 3,7‐Bis(Phenylethynyl)‐4‐Methylcoumarin DOI
Yuya Kaneko, Aohan Wang

Journal of Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 29, 2024

ABSTRACT π‐Conjugated polymers containing coumarin backbone in the main chain show acid–base responsive fluorescence. The α‐pyrone ring unit undergoes hydrolysis by inorganic bases and triggers change of expanded π‐conjugated system, resulting reversible fluorescence on/off switching, dual‐colored halochromic fluorescence, alkali metal ion recognition. We assume that form complexes with ions during hydrolysis. In this study, we investigated quenching behaviors responsivity 3,7‐dibromo‐4‐methylcoumarin, 3,7‐bis(phenylethynyl)‐4‐methylcoumarin (model compound), two types coumarin‐based addition organic for comparison. Consequently, model compound demonstrated remarkably switching behaviors, highlighting significant role metal‐free HCl aqueous solution facilitating ring‐opening closing properties. notable reversibility specifically PL intensity. These results are expected to enhance our understanding how recognized polymers.

Language: Английский

Citations

0