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Mechanism of Q(C≡N) Band Broadening in Condensed State of Alkoxycyanobiphenyles

Abstract In the present paper the spectral-structural-phase correlations in a series of the 4-cyano-4′-n-alkoxybiphenyles (n = 3 - 8) are studied. The analysis of Q(C≡N) band behaviour in the solid crystal (SC), liquid crystal (LC), isotropic liquid (IL) and hexane solution is carried out. The mechanism of intradimer energy transfer which explains the Q(C≡N) band breadth in the LC and IL phases is proposed.