Bis-Kalkon Türevlerinin Elektrokimyasal Davranışlarının İncelenmesi

Yıl 2020, Cilt: 11 Sayı: 1, 53 - 61, 03.06.2020

Neslihan Nohut Maşlakcı , Ali Kömür , Abdullah Biçer , Günseli Turgut Cin , Ayşegül Öksüz

https://doi.org/10.29048/makufebed.668313

Cited By: 1

Öz

Bis-kalkon
türevleri olarak bilinen (2E,5E)-2,5-dibenzilidensiklopentanon (P1) ve (2E,5E)-2,5-bis (4-nitrobenziliden)
siklopentanonun (P2) elektrokimyasal
davranışı çalışma elektrotu olarak bir indiyum kalay oksit (ITO) kullanılarak
döngüsel voltametri ile incelenmiştir. Tekrarlanan döngüsel voltammogram
ölçümleri bis-kalkon türevleri için mükemmel uzun süreli redoks stabilitesi
sergilemiştir. P1'in 1. döngüsü için
anodik bölgedeki oksidasyon piki -0.20 V'de görülürken, P2'nin oksidasyon piki -0.47 V'de gözlenmiştir. Öte yandan, P2 yapısında benzen halkası üzerinde p-konumunda elektron çekici NO₂
grubunun varlığı, en yüksek dolu moleküler orbital (HOMO) ve en düşük boş
moleküler orbital (LUMO) enerji aralığında bir artışa neden olmuştur. ITO cam
substratlar üzerine kaplanan P1 ve P2 filmlerinin yüzey morfolojisi ve
yapısal özellikleri, taramalı elektron mikroskopisi (SEM) ve enerji dağıtıcı X-ışını
spektroskopisi (EDS) kullanılarak incelenmiştir. SEM mikrografları, P1 ve P2'nin ITO yüzeyi üzerinde homojen bir şekilde dağıldığını
göstermiştir. CV ölçümünden sonra, P2'nin
tane boyutunun artan ITO yüzey pürüzlülüğü ile arttığı gözlenmiştir. Ayrıca EDS
sonuçları, ITO yüzeyi üzerinde P1 ve
P2'nin varlığını doğrulamıştır.

Anahtar Kelimeler

Bis-kalkon türevleri, döngüsel voltametri, elektrokimya

To Investigate the Electrochemical Behaviors of Bis-Chalcone Derivatives

Öz

The electrochemical behavior
of (2E,5E)-2,5-dibenzylidenecyclopentanone (P1) and (2E,5E)-2,5-bis(4-nitrobenzylidene)cyclopentanone (P2) known as bis-chalcone derivatives
was studied by cyclic voltammetry (CV) using an indium tin oxide (ITO) as the
working electrode. Repeated cyclic voltammograms measurements exhibited
excellent long-term redox stability for bis-chalcone derivatives. The oxidation
peak for in the anodic region for the 1st cycle of the P1 appeared at -0.20 V, while the oxidation peak of P2 was observed at -0.47 V. On the
other hand, the existence of the electron attracting NO₂ group at p-position on the benzene ring in the structure
of P2 caused an increase in the
highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular
orbital (LUMO) energy gap. The surface morphology and structural features of P1 and P2 films coated onto ITO glass substrates were investigated by
using scanning electron microscopy (SEM) and energy-dispersive X-ray
spectroscopy (EDS). SEM micrographs demonstrated that the P1 and P2 were
homogeneously distributed over the ITO surface. After CV measurement, it was
observed that the grain size of P2 increased
with increasing ITO surface roughness. Moreover, the EDS results confirmed the
presence of P1 and P2 on the ITO surface.

Anahtar Kelimeler

Bis-chalcone derivatives, cyclic voltammetry, electrochemistry

Kaynakça

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