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. 2021 Aug 23;29(1):251–263. doi: 10.1007/s11356-021-15187-5

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© The Author(s) 2021

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Fig. 2 — Fourier transform infrared analysis in attenuated total reflectance mode (FTIR-ATR) of βNS-Citr 1:4 and 1:8, comparison of samples from different synthetic pathway. Spectr in orange “classic” solvent synthesis, in blue TSE synthesis