Multi-state efficient luminogens with solvatochromic features based on a conjugation induced twisted framework for highly selective dual channel detection of mercury ion

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2024-11-05 DOI:10.1016/j.dyepig.2024.112534

Sumit Kumar Patra, Ramalingam Manivannan, Young-A Son

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引用次数: 0

Abstract

In several practical sectors, it has been demonstrated that multistate emissive materials have far wider applications than single state emissive fluorophore materials; yet, this remains an extremely challenging undertaking. It has been thought that adding rigid and twisted moieties to the D-A-D core will be appropriate to allow for both solid state and solution emission. By developing a donor-acceptor-donor pattern in a twisted molecule, herein we design and synthesize triphenylamine based two novel luminogens MSE1 and MSE2 with dual-state emission (DSEgens) which are brilliantly luminous equally at the liquid and solid phase, with positive solvatochromic features. The triphenylamine molecule's bulkiness can limit intramolecular movement in the liquid phase, thereby diminishing the non-radiative emission. Additionally, the twisted structure of the molecule reduce the negative effects of close π-π stacking in the solid state resulting high emission at aggregated state. In poor solvent like H₂O and extremely condensed solvent like polyethylene glycol, compound MSE1 and MSE2 exhibit aggregation-caused redshift emission (ACRE), which are supported by DLS and SEM investigations. The compound MSE1 in THF solution is able to recognize mercury selectively over other competitive cation through UV–vis and fluorescence channel. An eight fold suppression of fluorescence intensity and a change in absorbance of 115 nm were noted at the addition of 0–8 equivalent mercury to MSE1. Additionally, MSE1 has been used to create a low-cost, portable test paper strip that may be used to selectively monitor mercury in real time.

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基于共轭诱导扭转框架的具有溶解变色特征的多态高效发光体，用于高选择性双通道汞离子检测

在一些实际应用领域，多态发射材料的应用范围已远远超过单态发射荧光团材料；然而，这仍然是一项极具挑战性的工作。人们认为，在 D-A-D 核心上添加刚性和扭曲的分子将适合固态和溶液发射。通过在扭曲分子中开发供体-受体-供体模式，我们在本文中设计并合成了基于三苯胺的两种新型发光剂 MSE1 和 MSE2，这两种发光剂具有双态发射（DSEgens），在液相和固相都能发出绚丽的光，并具有正溶解变色特性。三苯胺分子的体积会限制液相中的分子内运动，从而减弱非辐射发射。此外，分子的扭曲结构还能减少固态中π-π堆叠的负面影响，从而在聚集状态下产生高发射。在 H2O 等贫溶剂和聚乙二醇等极度凝聚的溶剂中，化合物 MSE1 和 MSE2 显示出聚集引起的红移发射（ACRE），这一点得到了 DLS 和 SEM 研究的支持。化合物 MSE1 在 THF 溶液中能够通过紫外可见光和荧光通道选择性地识别汞，而不是其他竞争性阳离子。在 MSE1 中加入 0-8 等量汞时，荧光强度会被抑制八倍，吸光度也会发生 115 纳米的变化。此外，MSE1 还被用于制造一种低成本、便携式试纸条，可用于选择性地实时监测汞。

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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.