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A weak visible absorption spectrum of p-benzoquinone (p-BQ) in CS 2 due to n-π * singlet–triplet transition was measured. Using the resonance Raman (RR) effect in liquid-core optical fiber (LCOF), we have obtained the 514.5nm excited RR spectra of p-benzoquinone near 1445cm −1 and have demonstrated that the new characteristic RR band is attributed to the symmetric CO stretch...
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