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Publication Type
Journal Article
UWI Author(s)
Author, Analytic
Howell, Robertha C.; Edwards, S.H.; Gajadhar-Plummer, A.S.; Kahwa, Ishenkumba A.; McPherson, G.L.; Mague, J.T.; White, A.J.P.; Williams, D.J.
Author Affiliation, Ana.
Department of Chemistry
Article Title
Phthalimides: Supramolecular interactions in crystals, hypersensitive solution H-1-NMR dynamics and energy transfer to europium(III) and terbium(III) states
Medium Designator
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Connective Phrase
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Journal Title
Molecules
Translated Title
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Reprint Status
n/a
Date of Publication
2003
Volume ID
8
Issue ID
7
Page(s)
565-592
Language
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Connective Phrase
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Location/URL
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ISSN
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Notes
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Abstract
Detailed crystal structures and H-1-NMR characteristics of some alkylaminephthalimides, including dendritic polyphthalimides, are reported. These investigations were undertaken in order to obtain a better understanding of the relationship between solid-state supramolecular interactions, their persistence in solution and associated dynamics of magnetically hypersensitive phthalimide aromatic AA'BB'-AA'XX' proton NMR resonances. Some alkylamine phthalimides feature folded molecular geometries, which we attribute to n-pi interactions among proximal amine-phthalimide sites; those alkylamine-phthalimides that have no possibility for such interactions feature fully extended phthalimide functionalities. Accordingly, alkylamine phthalimide compounds with folded solid-state geometries feature solvent and temperature dependent hypersensitive AA'BB'-AA'XX' H-1-NMR line profiles, which we attribute to the n-pi interactions. Luminescence of Eu3+(D-5(o)) and Tb3+(D-5(4)) states show well defined metal ion environments in their complexes with dendritic phthalimides, as well as relatively weak phthalimide-lanthanide(III) interactions.....
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