Results
Title

SYNTHESIS OF AMPHIPHILIE TEMPO DERIVATIVE AND CHARACTERIZATION OF LANGMUIR MONOLAYERS OF AMPHIPHILIC ALKYL-TEMPOs AT THE AIR/WATER INTERFACE.

Authors

YOUNG SOO KANG; MI HYANG JEONG; SOO JA SHIN; YOUNG HWAN KIM; CHANG WOO KIM

Abstract

The amphiphilic TEMPO molecules consist of two dissimilar parts. One part is hydrophilic (head) and the rest part is hydrophobic (tail). The derivatives of 4-alkaneamino-2, 2, 6, 6-tetramethyl-1-piperidinyloxy radical (Cn-amino-TEMPO, n = 14, 16, 18, 20, 22) was synthesized with 4-amino-TEMPO and carboxylic acid. The Cn-amino-TEMPOs equilibrated at the air/water interface form Langmuir monolayer by classical Langmuir monolayer techniques. The stable monolayers of C14-22-amino-TEMPOs were characterized by pressure–area isotherms. The features of collapse pressure of C14-22-amino-TEMPOs were confirmed on alkyl chain length. Limiting area points and take-off area points from surface pressure-MMA isotherms were subjected to the influence of subphase. The monolayer of C22-amino-TEMPO which has longer alkyl chain was characterized by Brewster Angle Microscopy. So we can confirm phase transition by BAM images as monolayer is expanding at the room temperature.

Subjects

LANGMUIR probes; MONOMOLECULAR films; TEMPO (Computer program language); MICROSCOPY; PHASE transitions; SURFACES (Technology); NANOSCIENCE

Publication

International Journal of Nanoscience, 2006, Vol 5, Issue 6, p787

ISSN

0219-581X

Publication type

Academic Journal

DOI

10.1142/S0219581X06005169