Enhancement of Excimer Formation Ability by Modulating the Length of Side-Chains in Polyhedral Oligomeric Silsesquioxane (POSS) and Application for Fluorescence Sensors for Metal Cations

IF 4.7 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC ACS Applied Electronic Materials Pub Date : 2024-06-04 DOI:10.1093/bulcsj/uoae066

Hayato Narikiyo, Masayuki Gon, Kazuo Tanaka, Y. Chujo

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Abstract

Polyhedral oligomeric silsesquioxane (POSS) is a molecule with an inorganic cubic structure and organic side-chains and has attracted great attention for its application to luminescent materials by modifying luminophores. In this study, pyrenes-integrated POSSs with various lengths of side-chains were synthesized and the effect of the length on luminescent properties was evaluated. In optical measurements, highly efficient excimer emission was observed under dilute solution conditions. The higher value of the intensity ratio of the excimer emission to the monomer one was detected in the shortest side-chains. It is likely that the shorter side-chains of POSS lead to more efficient intramolecular interaction. Interestingly, we also found that the luminescence color was changed in response to metal cations in the dilute solutions. From the mechanistic study, metal cations such as Cu2+ can accelerate hydrolysis at the linker moiety. As a result, highly-sensitive luminescent sensors were obtained. These data represent that POSS can work as a reaction field where chemical reactions are accelerated through the accumulation of reactive species.

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通过调节多面体低聚硅烷基二氧杂环（POSS）中侧链的长度增强准分子形成能力及其在金属阳离子荧光传感器中的应用

多面体低聚硅倍半氧烷（POSS）是一种具有无机立方结构和有机侧链的分子，因其通过修饰发光体而被应用于发光材料而备受关注。本研究合成了具有不同侧链长度的芘集成 POSS，并评估了侧链长度对发光性能的影响。在光学测量中，稀溶液条件下观察到了高效的准分子发射。在最短的侧链中检测到的准分子发射与单体发射的强度比值较高。这可能是因为 POSS 的侧链越短，分子内相互作用的效率越高。有趣的是，我们还发现在稀溶液中，发光颜色会随着金属阳离子的变化而改变。从机理研究来看，Cu2+ 等金属阳离子可以加速连接分子的水解。因此，获得了高灵敏度的发光传感器。这些数据表明，POSS 可以作为一个反应场，通过活性物种的积累加速化学反应。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico

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