Juan Shi, Yong Liang, Zunting Zhang
Jan 26, 2017
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Influential Citations
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Journal
Zeitschrift für Kristallographie - Crystalline Materials
Abstract
Abstract 7-Hydroxy-3-methoxy-6-oxo-6H-benzo[c]- chromene-8-carboxylic acid (3a), 3,7-dihydroxy-6-oxo-6H- benzo[c]chromene-8-carboxylic acid (3b), 1,7-dihydroxy-6-oxo-6H-benzo[c]chromene-8-carboxylic acid (3c) and 2-bromo-7-hydroxy-6-oxo-6H-benzo[c]chromene-8-carboxylic acid (3d) were synthesized and characterized by the method of single crystal X-ray diffraction. Owing to bigger conjugated system and various H-bonds in 7-hydroxy-6-oxo-6H-benzo[c]chromene-8-carboxylic skeleton, 3a–3c have excellent fluorescence in ethanol solution and the solid state. The synthons involved in each crystal are identified, and the fluorescence emission differences leading to molecular recognition are determined.