TiO2 nanotubes as an efficient green catalyst for the multi-component synthesis of blue light emissive pyrazolyl-thaizole based fluorophores

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2025-02-01 DOI:10.1016/j.nanoso.2025.101439

Sultana Shaik , Sai Teja Talari , Rama Mohana Reddy Sirigireddy , Pushpavathi Itte , Kakarla Raghava Reddy , Chinna Gangi Reddy Nallagondu , Tejraj M. Aminabhavi

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引用次数: 0

Abstract

TiO₂ nanotubes (TNTs) are employed as a green heterogeneous catalyst for the synthesis of solid-state blue light emissive pyrazolyl-thiazoles (PZTZs) (4) via the three-component reaction of β-enaminones (1), thiosemicarbazide (2) and α-bromoketones (3) in ethanol and water (2:1). TNTs were prepared by hydrothermal method and characterized by XRD, UV-Vis DRS, photoluminescence (PL), HRTEM and EDAX techniques. Construction of three C–N and one C-S bonds in a single-step, nature-friendly reaction profile, large substrate scope, use of non-hazardous solvents, excellent yields (91–98 %) in short reaction times, gram scale feasibility and formation of pure products without the help of column purification are the attractive features of the present multi-component reaction (MCR) strategy. In addition, the catalytic medium displayed excellent efficiency towards diversified β-enaminones (1) and α-bromoketones (3); the recovered TNTs catalyst is used 7 times. Photophysical and electrochemical properties of PZTZs (4) have been investigated. The synthesized PZTZs (4) showed tunable photophysical and electrochemical properties by varying the substituents on both thiazole and pyrazole rings. Hence, the PZTZs (4) are promising materials for fabricating efficient and economically viable blue organic light-emitting diodes (BOLEDs).

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .