2. Experimental details
The TMZ sample in solid form was obtained from Aldrich Chemicals, USA and used as such without further purification to record FTIR, FT–Raman and UV–Vis spectra. The FTIR spectrum was recorded at room temperature on Bruker tensor-37 spectrometer in the mid IR region (4000–400 cm−1) using KBr pellet technique, with a spectral resolution of 2 cm−1. To increase the signal-to-noise ratio, a minimum of 32 scans were accumulated. The absorbance Aλ at a given wavenumber in FTIR spectrum was converted into epsilon value ελ (Lmol−1cm−1) using the Lambert–Beer law,
ελ=Aλ(bc)−1ελ=Aλ(bc)−1
where, b is the thickness of the pellet and c is the concentration of the sample in mol L−1. The FT–Raman spectrum in solid phase was recorded at room temperature on Bruker RFS spectrometer in the region 4000-50 cm−1, with a spectral resolution of 2 cm−1, using 1064 nm line of Nd:YAG laser as excitation wavelength. The UV–Vis spectrum was recorded in ethanol solvent in the region 800–200 nm using Lambda-950 UV–Vis–NIR spectrophotometer
2. Experimental detailsThe TMZ sample in solid form was obtained from Aldrich Chemicals, USA and used as such without further purification to record FTIR, FT–Raman and UV–Vis spectra. The FTIR spectrum was recorded at room temperature on Bruker tensor-37 spectrometer in the mid IR region (4000–400 cm−1) using KBr pellet technique, with a spectral resolution of 2 cm−1. To increase the signal-to-noise ratio, a minimum of 32 scans were accumulated. The absorbance Aλ at a given wavenumber in FTIR spectrum was converted into epsilon value ελ (Lmol−1cm−1) using the Lambert–Beer law,ελ=Aλ(bc)−1ελ=Aλ(bc)−1where, b is the thickness of the pellet and c is the concentration of the sample in mol L−1. The FT–Raman spectrum in solid phase was recorded at room temperature on Bruker RFS spectrometer in the region 4000-50 cm−1, with a spectral resolution of 2 cm−1, using 1064 nm line of Nd:YAG laser as excitation wavelength. The UV–Vis spectrum was recorded in ethanol solvent in the region 800–200 nm using Lambda-950 UV–Vis–NIR spectrophotometer
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