Two Dimensional Aggregation Behaviors of Quinoxaline Dendrimers

Title
Two Dimensional Aggregation Behaviors of Quinoxaline Dendrimers
Author
손대원
Keywords
Dendrimer; Surface Pressure-Area Isotherm; Langmuir-Blodgett Film; X-Ray Reflectivity
Issue Date
2015-02
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v. 15, NO 2, Page. 1511-1514
Abstract
This study focuses on the molecular behavior of two dendrimers containing a hydrophilic core group (carboxyl group) and hydrophobic branches (quinoxaline and methoxyphenyl groups), 2,3-bis(4-(2,3-bis(4-methoxyphenyl)quinoxalin-6-yloxy)phenyl)quinoxaline-6-carb-oxylic acid (G2) and 2,3-bis(4-(2,3-bis(4-(2,3-bis(4-methoxyphenyl)quinoxalin-6-yloxy)phe-nyl)quinoxalin-6-yl-oxy)phenyl) quin oxaline-6-carboxylic acid (G3) at the air-water interface. To understand the mechanism of the self-assembly of these molecules, we measured the surface pressure area (Pi-A) isotherm and investigated the surface morphology of Langmuir Blodgett films transferred onto hydrophilic silicon wafers using atomic force microscopy (AFM). Upon compression, G2 molecules stand up and steadily make close-packed monolayer whereas G3 molecules form circular domains and gradually make aggregates of domains. These results were confirmed by the X-ray Reflectivity (XRR) profiles of G2 and G3 monolayers transferred onto silicon substrates.
URI
http://www.ingentaconnect.com/content/asp/jnn/2015/00000015/00000002/art00085http://hdl.handle.net/20.500.11754/22409
ISSN
1533-4880; 1533-4899
DOI
10.1166/jnn.2015.9316
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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