10 Questions
Which type of molecular substances are expected to exhibit fluorescence?
Aromatic or multiple conjugated double bonds
What type of substitution groups often enhance fluorescence?
-NH2, -OH, -OCH3, -NHCH3, and -N(CH3)2 groups
Which factor favors fluorescence in molecules?
Rigid structures
In which type of rings is fluorescence expected unless they are fused to benzene rings?
Heterocyclic rings showing n →ᴨ* transitions
How does the formation of chelates with metal ions affect fluorescence?
It increases molecular rigidity and promotes fluorescence
Which type of rings are expected to show fluorescence unless they are fused to benzene rings?
Heterocyclic rings
What type of substitution groups often enhance fluorescence?
Electron donating groups: –NH2, –OH, – OCH3, – NHCH3
Which factor favors fluorescence in molecules?
Molecules possessing rigid structures
What is the effect of electron withdrawing groups on fluorescence?
Decrease (quench) fluorescence completely
In which type of compounds does the fluorescence increase by increasing the number of aromatic rings?
Organic compounds
Test your knowledge on photoluminescence, molecular fluorescence, and phosphorescence spectroscopy including factors affecting fluorescence intensity. Explore the structural factors that influence the fluorescence in molecular substances and the characteristics of compounds that exhibit fluorescence.
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