## 3 Results and Discussions
### FTIR Spectra Analysis
& Fullerenes identified in _Murchison_ and & \\  & & & & _Allende_ carbonaceous chondrite & \\  & & & & \\  & & & & \\  & & & & \\
1905–1699 & 1905–1699 & \(\bullet\) & Astorbed CO\({}_{2}\)[25] & \(\ast\) \\  & & & & _Murchison Meteorite:_ 1730 cm\({}^{-1}\) \\  & & & & corresponding to C=O & \\  & & & & _Bells Meteorite:_ \(\sim\)1730 cm\({}^{-1}\) assigned & \\  & & & & to C=O [7] & \\ \hline
1656 & 1656 & \(\bullet\) & Stretching vibrations of C–O bonds in COOH [21] & \(\ast\) \\  & & & Arenes overtones due to mono-substitution (689 cm\({}^{-1}\) & \\  & & & band) meta di-substitution (864 cm\({}^{-1}\) band) & \\ \hline  & & & O–H group in absorbed molecules of water and/or structural molecules of water of hydrous silicates [7] & _Murchison Meteorite:_ at \(\sim\)3400 and \\  & & & Stretching vibration modes of C=O involved in & 1640 cm\({}^{-1}\), and are assigned to \\  & & & hydrogen bonds in amides, as well as amino groups & \\  & & & (N–H), assigned to NHC=O amides I free and & \\  & & & H-bonded [21,26]. & \\  & & & & \\  & & & & \\  & & & & \\  &  
\begin{table}
\begin{tabular}{c c c c} \hline \hline \multicolumn{2}{c}{**Vibration Bands in the**} & \multicolumn{2}{c}{**Functional Groups**} & \multicolumn{2}{c}{**In Meteorites**} \\ \hline
**P1** & **P2** & & \\ \hline \multirow{6}{*}{1656} & \multirow{6}{*}{1656} & \multirow{6}{*}{\(\bullet\)} & \begin{tabular}{c} O–H group in absorbed molecules of water and/or structural molecules of water of hydrous silicates [7] \\ \end{tabular}  \\  & & \begin{tabular}{c} Stretching vibration modes of C=O involved in hydrogen bonds in amides, as well as amino groups \\ (N–H), assigned to NHC=O amides I free and H-bonded [21; 26]. \\ \end{tabular}  & \begin{tabular}{c} _Murchison Meteorite:_ at \(\sim\)3400 and 1640 cm\({}^{-1}\), and are assigned to structural and/or absorbed H\({}_{2}\)O of hydrous silicates [7] \\ \end{tabular}  \\  & & \begin{tabular}{c} \(\bullet\) \\ \end{tabular}  & \begin{tabular}{c} Skeletal vibrations of aromatic bonds C=C [21] \\ \(-(COO)^{-}\) stretching asymmetric [20] \\ \end{tabular}  & \begin{tabular}{c} _Bells Meteorite:_\(\sim\)1600 cm\({}^{-1}\) assigned to aromatic C=C [7] \\ \end{tabular}  \\  & & \ \begin{tabular}{c} \(\bullet\) \\ \end{tabular}  & \begin{tabular}{c} _Murchison Meteorite:_ around 1435 cm\({}^{-1}\); assigned to CO\({}_{3}\)\({}^{2-}\) \\ \end{tabular}  \\
The summary of the evidenced chemical compounds in the FTIR spectra (Figure 2) is as follows:  
* Carboxyl acids and/or amino acids (also in the Murchison and Bells carbonaceous chondrite meteorites);
* Amines, amides I and II;
* Aliphatic (also in the Murchison and Bells carbonaceous chondrite meteorites) and aromatic compounds (also in the Bells carbonaceous chondrite meteorite);
* Fullerenes (also in the Allende carbonaceous chondrite meteorite);
* Carbonates (also in the Murchison and Bells carbonaceous chondrite meteorites) as calcium carbonate in a crystalline state = calcite (the strong peak at 1429 and 1438 cm\({}^{-1}\);
* Sulfates (also in the Murchison and Bells carbonaceous chondrite meteorites) as calcium sulfate (CaSO\({}_{4}\) and FeSO\({}_{4}\)) and sulfites as calcium sulfite (CaSO\({}_{3}\));
* Thorium oxides (Th IV);
* Silicates (also in the Murchison and Bells carbonaceous chondrite meteorites) and silanol groups (Si-OH) as terminal groups bonded to the polymeric chain;
* Adsorbed water free molecules and H-bonded (also in the Murchison and Bells carbonaceous chondrite meteorites);
* Absorbed and structural water in hydrous silicates (also in the Murchison and Bells carbonaceous chondrite meteorites);
* Adsorbed carbon dioxide (CO\({}_{2}\)) on the fragments' surface;
* Sulfur may also be included in the organic compounds as sulfones and sulfoxides;
* The shape of the baseline of the two FTIR spectra that drops off at both edges indicates a scattering effect, due to crystalline structures. (See the bands at 1429 cm\({}^{-1}\) in P1 and at 1438 cm\({}^{-1}\) in P2).