Publication: 5-Fluorourasil molekülünün su komplekslerinin titreşim frekanslarının AB-Inito DFT yöntemi ile hesaplanması
Program
KU Authors
KU-Authors
Co-Authors
Advisor
Publication Date
2015-07
Language
Type
masterThesis
Journal Title
Journal ISSN
Volume Title
Abstract
5-Fluorourasil (C4H3FN2O2) (5-Fluoro-1H,3H-pyrimidine-2,4-dione), molekülü en eski kemoterapi ilaçlarından biridir, ilk kez 1957 yılında sentezlenmiştir ve o günden beri katı tümörlerin tedavisinde kullanılmaktadır. Aynı zamanda urasil ve türevleri temel biyolojik süreçlerde önemli bir rol oynamaktadır. Bu çalışmada, kanser tedavisinde ilaç olarak kullanılan 5-fluorourasil molekülünün yapısı, yoğunluk fonksiyonu teorisi (DFT), B3LYP fonksiyoneli ve 6-311++G(d,p) baz seti ile optimize edilmiş, en düşük enerjili moleküler yapısı saptanmıştır. Daha sonra mümkün su kompleksleri oluşturularak en düşük enerjili konformasyonları saptanmıştır. 5-Fluorasil monomerinin ve iki düşük enerjili su komplekslerinin optimize geometrik parametreleri kullanılarak titreşim frekans ve kipleri hesaplanmış ve sonuçlar deneysel kırmızı altı spektroskopik sonuçlar ile karşılaştırılmıştır. Çalışmanın amacı fizyolojik ortamda bu molekülün davranışlarını incelemek için molekülün su ile yaptığı etkileşmeleri saptamaktır.
5-Fluorourasil (C4H3FN2O2) (5-Fluoro-1H,3H-pyrimidine-2,4-dione), is one of the oldest chemotherapy drugs, was first synthesized in 1957 and it is being used since then for the treatment of solid tumors. Also, uracil and derivatives play important role in basic biological processes. In this study the molecular structure of the anticancer drug, 5-fluorouracil molecule, was optimized by using Density Functional theory, B3LYP functional and 6-311++G(d,p) basis set and the most stable geometry was determined . Afterwards, the possible water clusters of the molecule were formed and their energetically preferred conformations were investigated. The optimized structural parameters of the most stable monomer and two low energy water clusters were used in the vibrational wavenumber calculations. The vibrational wavenumbers and modes were calculated and compared with experimental IR spectra of solid 5-fluorouracil. The aim of this study is to investigate the interaction of 5-fluorouracil with water molecules in order to elucidate behaviors of the biological active molecule in physiological medium.
5-Fluorourasil (C4H3FN2O2) (5-Fluoro-1H,3H-pyrimidine-2,4-dione), is one of the oldest chemotherapy drugs, was first synthesized in 1957 and it is being used since then for the treatment of solid tumors. Also, uracil and derivatives play important role in basic biological processes. In this study the molecular structure of the anticancer drug, 5-fluorouracil molecule, was optimized by using Density Functional theory, B3LYP functional and 6-311++G(d,p) basis set and the most stable geometry was determined . Afterwards, the possible water clusters of the molecule were formed and their energetically preferred conformations were investigated. The optimized structural parameters of the most stable monomer and two low energy water clusters were used in the vibrational wavenumber calculations. The vibrational wavenumbers and modes were calculated and compared with experimental IR spectra of solid 5-fluorouracil. The aim of this study is to investigate the interaction of 5-fluorouracil with water molecules in order to elucidate behaviors of the biological active molecule in physiological medium.
Description
Source:
Publisher:
İstanbul Kültür Üniversitesi / Fen Bilimleri Enstitüsü / Fizik Anabilim Dalı
Keywords:
Subject
Biyofizik, Biophysics