A multi-responsive hydrogel with luminescence switching, mechanical tuning, and shape memory via reversible Ln-coordination bonds

IF 3.9 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2026-05-01 Epub Date: 2026-01-12 DOI:10.1016/j.dyepig.2026.113570

Yuchen Deng , Bin Li , Wei Qi , Wei Liu , Ning Zhang , Lanlan Zhao , Huanrong Li

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引用次数: 0

Abstract

The rapid development of smart hydrogels has greatly increased the demand for systems with adaptive and multi-responsive capabilities. However, it remains challenging to integrate multiple responsive functions into a singular hydrogel network, as most systems lack the molecular design to enable synergistic and reversible control over these distinct properties. Herein, we present a novel multifunctional hydrogel based on a dynamic Eu³⁺ coordination complex with allyl modified pyridine-2,6-dicarboxylic acid (APDA). This material exhibits luminescence switching, tunable mechanical performance and shape memory behavior in response to acid/base stimuli. The dynamic lanthanide metal-ligand coordination allows the reversible assembly and disassembly of the hydrogel network in response to base/acid stimuli, so that the hydrogel can realize the reversible stiff-soft conversion. The Eu³⁺-APDA coordination complexes formed under basic conditions function dually as a luminescent center and a cross-linking bond, fixing the hydrogel's temporary shape. Conversely, acid stimulation triggers their disintegration, leading to simultaneous luminescence quenching and shape recovery. This intelligent hydrogel system provides a novel design strategy for stimuli-responsive, multi-functional luminescence soft materials.

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具有发光开关、机械调谐和形状记忆的多响应水凝胶

智能水凝胶的快速发展极大地增加了对具有自适应和多响应能力的系统的需求。然而，将多个响应功能集成到一个单一的水凝胶网络中仍然具有挑战性，因为大多数系统缺乏对这些不同性质进行协同和可逆控制的分子设计。在此，我们提出了一种基于Eu3+与烯丙基修饰吡啶-2,6-二羧酸（APDA）的动态配位配合物的新型多功能水凝胶。这种材料在酸/碱刺激下表现出发光开关、可调谐的机械性能和形状记忆行为。镧系金属-配体的动态配位使得水凝胶网络在碱/酸刺激下进行可逆的组装和拆卸，从而使水凝胶实现可逆的硬-软转换。在基本条件下形成的Eu3+-APDA配合物具有发光中心和交联键的双重功能，固定了水凝胶的临时形状。相反，酸刺激会触发它们的分解，导致同时发光猝灭和形状恢复。这种智能水凝胶系统为刺激响应、多功能发光软材料提供了一种新的设计策略。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.