Molecular J-aggregation for the Langmuir-Blodgett film of a novel tripodal dye
- Authors
- Park, Han-gyu; Youm, Sang Gil; Jeon, Minhee; Park, Soo Young; Sohn, Daewon
- Issue Date
- Aug-2010
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Tripodal dyes; Air-water interface; Langmuir-Blodgett; J-aggregation
- Citation
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.366, no.1-3, pp.34 - 37
- Indexed
- SCIE
SCOPUS
- Journal Title
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
- Volume
- 366
- Number
- 1-3
- Start Page
- 34
- End Page
- 37
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/174393
- DOI
- 10.1016/j.colsurfa.2010.05.017
- ISSN
- 0927-7757
- Abstract
- We investigated the arrangement of a tripodal dye. N-1,N-3,N-5-tris(4-(5-(3,4,5-tridodecyloxyphenyl)-1,3,4-oxadiazol-2-yl)phenyl)benzene-1,3,5-tricarboxamide, A3O-3 (amide linkage), at the air-water interface by the Langmuir-Blodgett technique. The surface pressure (Pi) vs. surface area (A) isotherm for A3O-3 showed a sharp transition at 200 angstrom(2)/molecule. AT-IR and UV-visible spectrophotometry were employed to study the self-assembled structure of A3O-3 multilayers on the substrate. Comparisons with theoretical calculations of the molecular and extrapolated areas of the Pi-A isotherm revealed that a change in the molecular arrangement of the A3O-3 monolayer took place under conditions of sharply increasing surface pressure. AT-IR data showed no hydrogen-bonding at high pressure and also demonstrated that the stability of the monolayer is due to pi-pi interactions. UV data displayed a maximum red shift as the surface pressure increased, which suggests that J-aggregation was initiated at the monolayer interface.
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