UV light-switchable luminescent hydrogels based on lanthanide complexes and boron-nitrogen-doped carbon dots for luminescent response to acid-base vapor

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-09-23 DOI:10.1016/j.dyepig.2025.113271

Meng Jiao , Fangyu Liu , Xiaogang An , Jin Jiao , Wenwen Li , Hongyun Shi

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Abstract

Lanthanide complexes and carbon quantum dots (CDs) have drawn increasing attention in recent years as special building blocks for luminescent hydrogels due to their unique optical properties, chemical stability, biocompatibility, and low toxicity. However, the existing works are mainly limited to the luminescence color modulation at different excitation wavelengths, and few works have utilized two emitting sources to construct white-light hydrogels. Herein, we present a simple approach for the preparation of UV light-switchable hydrogels based on the conjugation of Na₃[Ln(dpa)₃] (Ln = Eu, Tb; dpa = pyridine-2, 6-dicarboxylic acid) and water-soluble CDs. Under 254 nm UV lamp irradiation, the composite of red light from Na₃[Eu(dpa)₃], green light from Na₃[Tb(dpa)₃] and blue light from CDs in an appropriate ratio can realize the construction of white-light hydrogels. Moreover, the emission colors of the resulting hydrogels can be switched from the white color of Na₃[Ln(dpa)₃]/CDs to the blue color of single CDs depending on the change in UV light illumination from 254 to 365 nm. The facile preparation and unique optical features make these hydrogels applicable in luminescent pH sensors with dual responsiveness at two non-interfering wavelengths.

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基于镧系配合物和硼氮掺杂碳点的紫外光可切换发光水凝胶对酸碱蒸汽的发光响应

镧系配合物和碳量子点（CDs）由于其独特的光学性质、化学稳定性、生物相容性和低毒性，近年来作为发光水凝胶的特殊组成部分受到越来越多的关注。然而，现有的研究工作主要局限于不同激发波长下的发光颜色调制，很少有研究利用两个发射源构建白光水凝胶。在此，我们提出了一种基于Na3[Ln(dpa)3] （Ln = Eu, Tb; dpa =吡啶- 2,6 -二羧酸）和水溶性CDs偶联制备紫外光开关水凝胶的简单方法。在254 nm紫外光照射下，由Na3[Eu(dpa)3]发出的红光、Na3[Tb(dpa)3]发出的绿光和CDs发出的蓝光按适当比例复合，可实现白光水凝胶的构建。此外，所得到的水凝胶的发射颜色可以从Na3[Ln(dpa)3]/CDs的白色切换到单个CDs的蓝色，这取决于紫外光照射从254到365 nm的变化。简单的制备和独特的光学特性使这些水凝胶适用于在两个非干扰波长具有双重响应的发光pH传感器。

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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.