pH dependent structural interconversion of 2-(2-hydroxy-benzylidene)-cyclohexan-1-one: Crystal structures and spectroscopic investigation

Add time:08/08/2019    Source:sciencedirect.com

The behavior of 2-(2-hydroxy-benzylidene)-cyclohexan-1-one (BC) in the acidic and basic media was investigated. In acidic conditions a new dimeric structure 4′a-methoxy-2,2′,3,3′,4′,4′a,9′,9′a-octahydro-1H, 1′H-4,9′-bixanthene (XTC) was isolated. The structures of BC and XTC were confirmed by single crystal X-ray diffraction and NMR. In basic conditions, unprotonated specie (BC−) was characterized by NMR, UV–Vis and fluorescent spectroscopy; BC could function as pH sensor.

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