Graphene Oxide/Zinc Phthalocyanine Selective Singlet Oxygen Visible-Light Nanosensor for Raman-Inactive Compounds.

IF 10.7 2区 材料科学 Q1 CHEMISTRY, PHYSICAL Small Methods Pub Date : 2024-12-20 DOI:10.1002/smtd.202401420
Alexandra I Zvyagina, Olga A Shiryaeva, Evgenia Yu Afonyushkina, Olesya O Kapitanova, Alexey A Averin, Ilya D Kormschikov, Alexander G Martynov, Yulia G Gorbunova, Irina A Veselova, Maria A Kalinina
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Abstract

A novel phthalocyanine-based hybrid nanofilm is for the first time successfully applied as an oxidative platform for surface enhanced Raman spectroscopy (SERS) sensing to fine-resolve Raman-inactive compounds. The hybrid is formed by self-assembly of zinc(II) 2,3,9,10,16,17,23,24-Octa[(3',5'-dicarboxy)-phenoxy]phthalocyaninate (ZnPc*) with the solid-supported monolayer of graphene oxide (GO) mediated by zinc acetate metal cluster. Atomic force microscopy, UV-vis and fluorescence spectroscopies confirm that this simple coordination motive in combination with molecular structure of ZnPc* prevents contact quenching of the light-excited triplet state through aromatic stacking with GO particles. Fluorescence probing with Sensor Green and terephthalic acid as specific indicators of active oxygen intermediates shows that the hybrid nanofilm initiates selective singlet oxygen generation under visible light. Direct one-electron oxidation of tetramethylbenzidine (TMB) (1.0×10-7 m) on the hybrid surface in the presence of 100 nm silver nanoparticles as plasmonic hot-spots under 450-640-nm light irradiation yields well-resolved resonance Raman spectrum of the oxidized form TMB+1. Using these hybrid nanofilms as visible light platforms for redox reaction of target analytes without additional oxidizing agents, the range of Raman-detectable compounds can be significantly expanded through a rapid ultrasensitive SERS screening of substances currently considered Raman-inactive.

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Small Methods
Small Methods Materials Science-General Materials Science
CiteScore
17.40
自引率
1.60%
发文量
347
期刊介绍: Small Methods is a multidisciplinary journal that publishes groundbreaking research on methods relevant to nano- and microscale research. It welcomes contributions from the fields of materials science, biomedical science, chemistry, and physics, showcasing the latest advancements in experimental techniques. With a notable 2022 Impact Factor of 12.4 (Journal Citation Reports, Clarivate Analytics, 2023), Small Methods is recognized for its significant impact on the scientific community. The online ISSN for Small Methods is 2366-9608.
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