Luminescence quenching of pyrene-labeled fluorescent dendrons by surface anchoring of ruthenium nanoparticles

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-04-07 DOI:10.1039/d5dt00192g

Roberto González Gómez, Mireille Vonlanthen, Christian Bijani, Catherine Amiens, Ernesto Rivera, Karine Philippot

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引用次数: 0

Abstract

Hybrid nanostructures comprising ruthenium nanoparticles (Ru NPs) and Fréchet type dendrons of first (G1) and second (G2) generations bearing two and four pyrene units, respectively, and a carboxylic acid group as an anchoring function, have been prepared by taking advantage of the organometallic approach and ligand exchange. Their optical properties have been studied by absorption and fluorescence spectroscopies and compared with those of counterparts prepared in the same conditions but with pyreneacetic acid and pyrenebutyric acid as fluorophores. Pyrene-labelled Fréchet type dendrons display more pyrene units at a longer distance from the Ru surface than pyreneacetic acid and pyrenebutyric acid fluorophores. Interestingly, and unlike pyreneacetic acid- and pyrenebutyric acid-derived nanohybrids, the dendron-functionalized Ru NPs exhibit significant to efficient quenching of the pyrene fluorescence (67% for G2 and 94% for G1 with respect to the free dendrons). The quenching effect of the Ru metallic cores onto the fluorophore units opens up new prospects for the use of such nanohybrids as antennas for photocatalytic applications.

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钌纳米颗粒表面锚定对芘标记荧光树突的猝灭作用

利用有机金属方法和配体交换制备了由钌纳米粒子（Ru NPs）和第一代（G1）和第二代（G2） fr型树突组成的杂化纳米结构，它们分别含有2个和4个芘单元，并具有羧酸基作为锚定功能。用吸收光谱和荧光光谱研究了它们的光学性质，并与在相同条件下以芘乙酸和芘丁酸为荧光团制备的同类化合物进行了比较。与芘乙酸和芘丁酸荧光团相比，芘标记的fr型树突在距离钌表面较远的地方显示出更多的芘单位。有趣的是，与芘乙酸和芘丁酸衍生的纳米杂化体不同，树突功能化的Ru NPs对芘荧光的有效猝灭表现显著（相对于自由树突，G2为67%，G1为94%）。钌金属芯对荧光团单元的猝灭作用为这种纳米杂化材料作为天线用于光催化应用开辟了新的前景。

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.