Abstract
Three different azobenzene derivatives, namely, 2-(6-methacryloxyhexyloxy)-4-hexyloxy-4′-hexyloxyazobenzene (A1) and poly{6-[5-hexyloxy-2-(4-hexyloxypheny)azophenyloxy]hexyl methacrylate}x-co-{2-hydroxyethyl methacrylate}y, (A2, x = 0.8, y = 0.2), and (A3, x = 0.2. y = 0.8), have been synthesized to study the characterization of Langmuir monolayers at the air-water interface and the aggregation and orientation of Langmuir-Blodgett (LB) films on a solid substrate. The surface pressure-area isotherms showed that they could form well-defined condensed-type monolayers, with A1 and A2 undergoing conformational transition. The monolayers of A1 and A3 could be deposited onto substrate at 20 mN/m at 20 °C with a near unity transfer ratio. The polarized Fourier transform infrared and polarized UV-vis spectra revealed that LB films of A1 and A3 on substrates had in-plane orientation with the long axis of azobenzene moiety exhibiting a large tilt angle (42° and 35°, respectively) with respect to the substrate normal. The UV-vis spectra of A1 and A3 gave us information that A1 and A3 formed J-aggregate both in solution and in LB films.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 5231-5236 |
| Number of pages | 6 |
| Journal | Langmuir |
| Volume | 14 |
| Issue number | 18 |
| State | Published - Sep 1 1998 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Colloid and Surface Chemistry
- Physical and Theoretical Chemistry
Cite this
Characterization and structure of side-on azo copolymers in Langmuir-Blodgett films. / Jin, Jian; Li, Lin Song; Zhang, Yan Jie; Tian, Yan Qing; Jiang, Shimei; Zhao, Yingying; Bai, Yubai; Li, Tie Jin.
In: Langmuir, Vol. 14, No. 18, 01.09.1998, p. 5231-5236.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Characterization and structure of side-on azo copolymers in Langmuir-Blodgett films
AU - Jin, Jian
AU - Li, Lin Song
AU - Zhang, Yan Jie
AU - Tian, Yan Qing
AU - Jiang, Shimei
AU - Zhao, Yingying
AU - Bai, Yubai
AU - Li, Tie Jin
PY - 1998/9/1
Y1 - 1998/9/1
N2 - Three different azobenzene derivatives, namely, 2-(6-methacryloxyhexyloxy)-4-hexyloxy-4′-hexyloxyazobenzene (A1) and poly{6-[5-hexyloxy-2-(4-hexyloxypheny)azophenyloxy]hexyl methacrylate}x-co-{2-hydroxyethyl methacrylate}y, (A2, x = 0.8, y = 0.2), and (A3, x = 0.2. y = 0.8), have been synthesized to study the characterization of Langmuir monolayers at the air-water interface and the aggregation and orientation of Langmuir-Blodgett (LB) films on a solid substrate. The surface pressure-area isotherms showed that they could form well-defined condensed-type monolayers, with A1 and A2 undergoing conformational transition. The monolayers of A1 and A3 could be deposited onto substrate at 20 mN/m at 20 °C with a near unity transfer ratio. The polarized Fourier transform infrared and polarized UV-vis spectra revealed that LB films of A1 and A3 on substrates had in-plane orientation with the long axis of azobenzene moiety exhibiting a large tilt angle (42° and 35°, respectively) with respect to the substrate normal. The UV-vis spectra of A1 and A3 gave us information that A1 and A3 formed J-aggregate both in solution and in LB films.
AB - Three different azobenzene derivatives, namely, 2-(6-methacryloxyhexyloxy)-4-hexyloxy-4′-hexyloxyazobenzene (A1) and poly{6-[5-hexyloxy-2-(4-hexyloxypheny)azophenyloxy]hexyl methacrylate}x-co-{2-hydroxyethyl methacrylate}y, (A2, x = 0.8, y = 0.2), and (A3, x = 0.2. y = 0.8), have been synthesized to study the characterization of Langmuir monolayers at the air-water interface and the aggregation and orientation of Langmuir-Blodgett (LB) films on a solid substrate. The surface pressure-area isotherms showed that they could form well-defined condensed-type monolayers, with A1 and A2 undergoing conformational transition. The monolayers of A1 and A3 could be deposited onto substrate at 20 mN/m at 20 °C with a near unity transfer ratio. The polarized Fourier transform infrared and polarized UV-vis spectra revealed that LB films of A1 and A3 on substrates had in-plane orientation with the long axis of azobenzene moiety exhibiting a large tilt angle (42° and 35°, respectively) with respect to the substrate normal. The UV-vis spectra of A1 and A3 gave us information that A1 and A3 formed J-aggregate both in solution and in LB films.
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M3 - Article
AN - SCOPUS:0032162853
VL - 14
SP - 5231
EP - 5236
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 18
ER -