Comparative Fourier Transform Infrared Investigation of Oltu-Stone (Natural Carbon Black) and Jet |
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| Authors: | Murat Hatipoğlu Stella Nunziante Cesaro David Ajò |
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| Institution: | 1. Dokuz Eylül University, IMYO, Izmir Multidisciplinary Vocational School, Gemmology and Jewellery Programme , Buca-?zmir , Turkey murat.hatipoglu@deu.edu.tr;3. Institute of Nanostructured Materials, CNR, c/o Dept. of Chemistry, “Sapienza” University , Rome , Italy;4. Institute of Inorganic Chemistry and Surfaces, CNR , Padova , Italy |
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| Abstract: | Fourier transform infrared (FT-IR) investigation of Oltu-stone (natural carbon black) and jet revealed several differences between these carbonaceous materials. The band peaking at about 1000 cm?1 is the first important difference: while the band in the jet spectra appears as one sharp peak at about 1001 cm?1, the similar band in the Oltu-stone spectra is shifted to about 1026 cm?1 with a broad shoulder toward high frequency. Even though the assignment of the shifted band is at present controversial, it may be attributed to carbon-oxygen stretching mode. Second, the doublet bands at about 2912 and 2843 cm?1 are much more intense in the jet spectra then in the Oltu-stone spectra. They are confidently attributed to aliphatic C-H stretching mode. Finally, the broad water band on setting at about 3750 cm?1 is maturated in Oltu-stone, and it is much more evident than in that of jet. Therefore, FT-IR appears as a favorable identification method for these kinds of carbonaceous materials. |
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| Keywords: | FT-IR jet natural Turkish carbon black Oltu-stone turbostratic carbon |
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