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Title of article :
The investigation of structural and thermosensitive properties of new phosphazene derivative bearing glycol and aminoalcohol
Author/Authors :
Uslu، نويسنده , , Aylin and K?l?ç، نويسنده , , Adem and Güvenalt?n، نويسنده , , ?ener، نويسنده ,
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روزنامه با شماره پیاپی سال 2010
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Abstract :
Three isomers (nongeminal cis-2,4,6 (2); nongeminal trans-2,4,6 (3); geminal 2,2,4 (4)) were isolated from the reaction of hexachlorocyclotriphosphazatriene (trimer) (1) with diethylene glycol monobutyl ether (DEGBE). The substitution reactions of cis-tris isomer (2) with 3-amino-1-propanol were investigated under different solutions conditions to provide amphiphilic phosphazene (5). All of compounds were characterized by using elemental analysis, 31P NMR and mass spectroscopies. Thermosensitive properties of compound 5 were studied. The compound 5 is soluble in both water and organic media. This indicates that compound 5 is an amphiphilic molecule. Concentration-dependent LCST (Lower Critical Solution Temperature) behavior of 5 was measured in water. Compound 5 exhibited a reversible and thermosensitive phase transition in aqueous medium, from soluble to insoluble states. Compound 5 showed LCST at 37 °C (for 7 wt.% concentration) which is near to body temperature.
Keywords :
Geminal , 31P NMR , Hexachlorocyclotriphosphazene , Nongeminal , amphiphilic
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