SPECTRAL STUDY FOR THE EFFECT OF SOLVENT DIELECTRIC CONSTANT ON THE OPTICAL BAND GAP FOR (4-OXOTHIAZOLIDIN-2-YLIDENE) ACETONITRILE. | ||||
| Al-Azhar Bulletin of Science | ||||
| Article 3, Volume 25, Issue 2-B, December 2014, Page 15-19 PDF (784.61 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/absb.2014.22606 | ||||
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| Authors | ||||
| M. Ibrahim* 1; G. A. M. El Hag Ali2 | ||||
| 1Departments of Physics , Faculty of Science, Al Azhar University, Nasr city, Cairo 11884, Egypt. | ||||
| 2Chemistry, Faculty of Science, Al Azhar University, Nasr city, Cairo11884, Egypt | ||||
| Abstract | ||||
| Heterocyclic compound of (4-oxothiazolidin-2-ylidene) acetonitrile was prepared in powder form. The crystalline nature of the prepared sample was checked by X- ray diffraction (XRD). IR absorption spectra were recorded on a Shimadzu 440 infrared spectrophotometer (cm-1) using the KBr technique (Shimadzu, Japan). Reflection spectra of the powder sample were obtained in the wavelength range (200-2500 nm) at room temperature using spectrophotometer. Absorption and transmission spectra of the prepared sample were obtained in different solvents in the wavelength range (190-1100nm).The solvent used are acetone, dimethyformamid (D.M.F.) and glycerol. The measurements were carried out at room temperature using (JENWAY 6405 UV/VIS) spectrophotometer. The optical energy gap which is the difference between lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) was estimated. The effect of the solvent dielectric constant on optical band gap was discussed. | ||||
| Keywords | ||||
| Optical band gap; FT-IR absorption and X-ray diffraction | ||||
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