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Coumarin-based chromophores with azo and pyrazoline moieties were synthesized and their structures and properties elucidated using spectroscopy. The coumarins were luminescent, having solid state emission at wavelengths ranging from 400 to 750 nm, depending on structure. The relationships between the solid state photoluminescence and both chemical and crystal structures are discussed.
Three bis(arylmethylidene)cyclopentanone dyes were synthesized and their structures and properties elucidated using single-crystal X-ray diffraction, mass spectrometry, 1 H nuclear magnetic resonance, IR and UV–Vis spectroscopy. X-ray analyses revealed that two were monoclinic, with space group P2 1 /c, while the third dye was triclinic, with space group P1¯. All three molecules adopted...
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