- Structural and chemosensor properties of FDA and FDP derivatives of fluorenylidene bridged cyclotetraphosphazenes
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The first series of 4,4′-(9-fluorenylidene)diphenol (FDP) (5) and 4,4′-(9-fluorenylidene)dianiline (FDA) (6) bridged and open chained cyclotetraphosphazene derivatives (15-23) have been synthesized. Their florescence and chemosensor properties are reported. Nucleophilic substitution reactions of octachlorocyclotetraphosphazene (1) with mono-functional reagents [phenol (2), 2-naphthol (3) and 1-hydroxypyrene (4)] were carried out and the heptasubstituted derivatives (8, 11 and 14) were obtained. Then the reactions of 8, 11 and 14 with 4,4′-(9-fluorenylidene)diphenol (FDP) (5) and 4,4′-(9-fluorenylidene)dianiline (FDA) (6), respectively gave bridged and open chained compounds. The structures of the synthesized compounds (7-23) were verified by elemental analyses, mass spectrometry, UV Vis, 1H and 31P NMR techniques and fluorescence spectroscopy. The metal sensing properties of the novel bridged open chain cyclotetraphosphazene derivatives were also examined by fluorescence spectroscopy. These complexes showed high selectivity for Cu2+ and Fe3+ ions in solution.
- ?enkuytu, Elif,?ift?i, G?nül Yenilmez
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- Studies of Phosphazenes. Part 15. Chloro(phenoxy)cyclotetraphosphazenes, N4P4Cl(8-n)(OPh)n
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The reaction of N4P4Cl8 (1) with sodium phenoxide (or phenol in the presence of triethylamine) has been studied under a variety of experimental conditions.The chloro(phenoxy))-derivatives, N4P4Cl(8-n)(OPh)n , have been isolated by column chromatography over silica gel.Attempts to separate geometric isomers were unsuccessful.Structural elucidation of the products is based on the 31P n.m.r. data for the chloro-precursors and 1H and 31P n.m.r. spectra of the dimethylami no - and/or methoxy-derivatives.The chlorine-replacement pattern is discussed.
- Dhathathreyan, Kaveripatnam S.,Krishnamurthy, Setharmpattu S.,Woods, Michael
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p. 2151 - 2158
(2007/10/02)
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