Investigation of the Novel Complex with Copper(II)-Nicotinamide in Terms of Structural and Spectroscopic Properties

Year 2021, Volume: 6 Issue: 1, 55 - 65, 11.06.2021

Tuğba Aycan

https://doi.org/10.33484/sinopfbd.719915

Abstract

[Cu(na)2(H2O)4]2+.[Cu(H2O)6]2+.[(SO4)2]4-.(H2O)2 (na=nicotinamide), was investigated by focusing on its supramolecular architecture. Structural properties of the complex were characterized by XRD, spectroscopic methods, thermogravimetric and elemental analysis. Further ultra-violet (UV)-visible spectral analysis and Thermogravimetric analysis were performed to understand optical and thermal properties. It has been observed that complex has crystallized in the monoclinic crystal system in P21/c space group. The complex has two Cu(II) metals; one is coordinated with the oxygen atoms of six aqua while the other is coordinated through two nitrogen atoms of the na and the oxygen atoms from four aqua. Both Cu(II) ions have slightly distorted octahedral environments. There are a lot of hydrogen bonds due to aqua and water molecules. The complex is connected by hydrogen bonds to form a supramolecular structure. The IR spectroscopic study of the complex was carried out within the middle IR region, substantially focusing on the characteristic vibrations of nicotinamide.

Keywords

Single Crystal XRD, IR spectroscopy, UV-Vis. spectroscopy, thermal analysis

Bakır(II)-Nikotinamit İçeren Yeni Kompleksin Yapısal ve Spektroskopik Özellikler Açısından İncelenmesi

Abstract

Bu çalışma [Cu(na)2(H2O)4]2+.[Cu(H2O)6]2+.[(SO4)2]4-.(H2O)2 (na=nikotinamit) kompleksinin supramoleküler mimarisine odaklanmıştır. Kompleksin yapısal özellikleri, XRD, spektroskopik yöntemler, termogravimetrik ve elementel analiz ile tanımlanmıştır. Kompleksin monoklinik kristal sisteminde P21/c uzay grubunda kristallendiği görülmüştür. Kompleks içinde iki Cu(II) metali vardır ve her ikisi de az bozulmuş oktahedral çevreye sahiptir. Cu(II) iyonlarından birisi su moleküllerinin oksijen atomlarıyla koordine iken diğeri na ligandının iki azot atomu ve su moleküllerinin oksijen atomlarıyla koordinedir. Kristal yapıda, su ve kristal örgü su moleküllerinden dolayı çok fazla hidrojen bağı vardır. Kompleks hidrojen bağları ile supramoleküler yapıyı meydana getirmiştir. Kompleksin IR spektroskopik çalışmaları, esas olarak nikotinamitin karakteristik titreşimlerine odaklanarak orta IR bölgesi içerisinde gerçekleştirilmiştir.

Keywords

Tek Kristal XRD, IR Spektroskopisi, UV-Vis Spektroskopisi, termal analiz

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