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Herein, we investigate the non-covalent
interactions between aromatic compounds and a spirocycle-bearing
imidazolidinedithione molecule
3ʹ-aminofluorene-9-spiro-5ʹ-imidazolidine-2ʹ,4ʹ-dithione Host
Material (HM). HM and planar aromatic solvent molecules, such as
benzene, pyrrole, and thiophene, form molecular compounds with a
composition ratio of 2:1 through NH∙∙∙π interactions. These
compounds exhibit weak emission in the λmax range of 515–544 nm,
which were estimated from the sum of the squares of the differences
between the electronegativities of the bonded atoms comprising the
guest molecule structures without employing quantum calculations.
Moreover, a linear correlation between the desorption temperature
and NH∙∙∙π interactions is determined from the heats of formation of
HM, guest molecules, and corresponding molecular compounds. |
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Key words:
3ʹ-aminofluorene-9-spiro-5ʹ-imidazolidine-2ʹ,4ʹ-dithione, Molecular
compound, N-H∙∙∙π interaction, Planar
aromatic solvent. |
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