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Kimya Bilim Dalı

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Browsing Kimya Bilim Dalı by Subject "Pyrrolizinones"

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    Pyrrolizine-3-ones: Synthesis and evaluation of photophysical properties
    (Taylor & Francis inc, 2024) Tasgin, Dilek Isik; Bayraktar, Irem; 169107
    We describe a synthetic approach for pyrrolizine-3-one derivatives and their photophysical properties. These compounds are prepared by a series of reactions employing the substituted pyrroles in one-pot, two-step oxidation, and intramolecular cyclization processes. The photophysical properties of the synthesized compounds were studied by using UV-Vis and fluorescence spectroscopy in different solvents. Maximum absorbance peaks were observed around 306-416 nm and maximum fluorescence emission around 603-614 nm and 465-498 nm for pyrrolyl and N-methyl pyrrolyl substituents, respectively. The introduction of a pyrrolyl substituent had a significant impact on the Stokes shifts (192-206 nm) and quantum yield values ranged from 0.002 to 0.046.