Red Shift of Ultraviolet Absorption Peak in ESOF: Evidence of Furan Group Incorporation
The red shift of the ultraviolet absorption peak in ESOF compared to ESO confirms the occurrence of 'ππ' transition in the furan group due to its unsaturated double bonds. This observation, obtained through UV-visible spectroscopy, also indicates the incorporation of the furan group into the main chain of ESOF.
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