دورية أكاديمية
Synthesis of peripheral thiol functionalized (NiII) phthalocyanine and its attachment on Au electrode for electrochemical determination of L-DOPA
| العنوان: | Synthesis of peripheral thiol functionalized (NiII) phthalocyanine and its attachment on Au electrode for electrochemical determination of L-DOPA |
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| المؤلفون: | Rahul Ramkumar, S. Denisdon, S. Claretraja, P. Muthukumar, K. Ganesan, M. Amalraj, A. John Jeevagan |
| المصدر: | Chemical Physics Impact, Vol 8, Iss , Pp 100567- (2024) |
| بيانات النشر: | Elsevier, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Physics LCC:Chemistry |
| مصطلحات موضوعية: | Thiol functionalized phthalocyanine, Self-assembled monolayer, Raman spectroscopy, 3,4-dihydroxy-1-phenylalanine, Electrocatalyst, Physics, QC1-999, Chemistry, QD1-999 |
| الوصف: | This paper presents the synthesis, characterization, and electrocatalytic behavior of peripheral thiol-functionalized nickel(II) phthalocyanine (4β-NiIITTPc). The complex was synthesized and characterized using MALDI-TOF mass spectra, UV–visible, and FT-IR spectroscopies. Upon self-assembly on the Au surface from dimethylformamide solution, 4β-NiIITTPc forms via the formation of an Au-S bond. The attachment onto the Au surface was verified through Raman spectroscopy and cyclic voltammetry, with characteristic bands at 2572 and 250 cm−1 corresponding to -SH and Au-S stretching vibrations, respectively. Notably, the -SH stretching indicates that not all four -SH groups of 4β-NiIITTPc are involved in chemisorption. The resulting self-assembled film on the Au electrode exhibits well-defined oxidation peaks at +0.34 V and +0.56 V, corresponding to NiIII/NiII and NiIIPc−1/NiIIPc−2, respectively. The surface coverage was estimated from the charge associated with NiII/NiIII oxidation, yielding 1.01 × 10−10 mol cm−2. Finally, the electrocatalytic activity of the self-assembled monolayer (SAM) of 4β-NiIITTPc on Au electrodes was assessed by studying the oxidation of 3,4-dihydroxy-1-phenylalanine (L-dopa) as a probe. The SAM-modified electrode not only shifts the oxidation potential of L-dopa to a less positive potential but also enhances the oxidation current and mitigates electrode surface fouling compared to the bare Au electrode. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2667-0224 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2667022424001117; https://doaj.org/toc/2667-0224 |
| DOI: | 10.1016/j.chphi.2024.100567 |
| URL الوصول: | https://doaj.org/article/b3f1b368c3514b5888de83907e660bb8 |
| رقم الأكسشن: | edsdoj.b3f1b368c3514b5888de83907e660bb8 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 26670224 |
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| DOI: | 10.1016/j.chphi.2024.100567 |