Four multi-stimuli-responsive color-changing materials based on Anderson-viologens for erasable inkless printing, UV detectors and gradient detection of amine gases

IF 4.6 2区化学 Q1 SPECTROSCOPY Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-05-05 Epub Date: 2025-01-30 DOI:10.1016/j.saa.2025.125826

Yuzhu Sun , Mengle Yang , Tao Liu , Jun Ying , Aixiang Tian , Xiuli Wang

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Abstract

Multi-stimuli-responsive materials have garnered widespread attention due to their exceptional potential in various applications, including optical anti-counterfeiting devices, sensor technology, and information storage materials. In this study, we demonstrate the synthesis of four polyoxometalates/viologens (POMs/Vios)-based compounds featuring remarkable color-changing performance, namely, [Zn₆(HL)₂(H₂O)₂₀(TeMo₆O₂₄)₃]·6H₂O (1), [Co₆(HL)₂(H₂O)₂₀(TeMo₆O₂₄)₃]·4H₂O (2), [Zn(TeMo₆O₂₄)(H₂O)₂]·L₂·6H₂O (3), [Co(TeMo₆O₂₄)(H₂O)₂]·L₂·6H₂O (4) (L·Cl₂ = 1,1′–[1,3–phenylenebis(methylene)] bis–(4,4′–bipyridine) dichloride). Compounds 1, 3, and 4 exhibit rapid and reversible photochromic properties, making them suitable for applications in erasable inkless printing and information storage. Furthermore, hydrogels based on these compounds can act as ultraviolet detectors. An innovative electrochromic (EC) hydrogel can be prepared by incorporating compounds 1–4 into polyacrylamide (PAAm). The integrated electrochromic devices (ECDs) based on EC hydrogel can precisely switch between the coloring and fading states through the precise control of different voltages. They are characterized by simple operation, high sensitivity, and low-voltage drive (ranging from –0.21 to –0.35 V). Additionally, compounds 1–4 act as highly efficient organic amine gas sensors. This work is anticipated to provide inspiration for the systematic design and development of diverse color-changing materials that respond to multiple external stimuli.

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四种基于Anderson-viologens的多刺激响应变色材料，用于可擦无墨印刷，紫外检测器和胺类气体的梯度检测

多刺激响应材料因其在光学防伪器件、传感器技术和信息存储材料等方面的特殊应用潜力而受到广泛关注。在本研究中，我们合成了四种具有显着变色性能的多金属氧酸盐/viologens （POMs/Vios）基化合物，即[Zn6(HL)2(H2O)20(TeMo6O24)3]·6H2O (1), [Co6(HL)2(H2O)20(TeMo6O24)3]·4H2O (2), [Zn(TeMo6O24)(H2O)2]·L2·6H2O (3), [Co(TeMo6O24)(H2O)2]·L2·6H2O (4) （L·Cl2 = 1,1 ' -[1,3 -苯基双（亚甲基）]双-（4,4 ' -联吡啶）二氯）。化合物1、3和4表现出快速和可逆的光致变色特性，使它们适用于可擦除无墨印刷和信息存储。此外，基于这些化合物的水凝胶可以作为紫外线探测器。通过将化合物1-4掺入聚丙烯酰胺（PAAm）中，可以制备出一种新型的电致变色（EC）水凝胶。基于EC水凝胶的集成电致变色器件（ECDs）可以通过对不同电压的精确控制在显色和褪色状态之间精确切换。它们的特点是操作简单，灵敏度高，低压驱动（范围从-0.21到-0.35 V）。此外，化合物1-4作为高效的有机胺气体传感器。这项工作有望为响应多种外部刺激的各种变色材料的系统设计和开发提供灵感。

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.