Photo-and thermo-chromism in vacuum-deposited polydiacetylene films

Kanetake, T.; Tokura, Y.; Koda, T.

doi:10.1016/0038-1098(85)90313-8

Cited by 58 publications

(25 citation statements)

References 11 publications

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“…Traditionally, the Langmuir-Blodgett (LB) technique, 18-20 self-assembly, 21 and vacuum evaporation 22 are the major methods for preparing ultra-thin films on top of solid surfaces. Even today, the LB technique is still an unique and important technique because it is the simplest and the most reliable method for obtaining ultra-thin films, with the highest material transferring efficiency.…”

Section: Introductionmentioning

confidence: 99%

Self-assembly of DNA networks at the air–water interface over time

Xuan

Wei

et al. 2013

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Self-assembly of DNA networks at the air–water interface over time

Xuan

Wei

et al. 2013

RSC Adv.

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“…The photopolymerization of diacetylene (DA) derivatives in single crystals1 and amphiphilic DAs in Langmuir–Blodgett (LB) films,2 self‐assembled monolayers,3 and evaporated films4 has attracted much interest for the fabrication of functionalized π‐conjugate systems such as nonlinear optical devices5, 6 and characteristic electrical conduction 7–9. These DA monomers change from being transparent to blue and red through photopolymerization.…”

Section: Introductionmentioning

confidence: 99%

Changes in the near‐edge X‐ray absorption fine structure spectra of long‐chain diacetylene derivatives through photopolymerization in Langmuir–Blodgett films

Fujimori

Ishitsuka

Nakahara

et al. 2004

J Polym Sci B Polym Phys

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Photopolymerization of cadmium 10,12‐pentacosadiynoate (CdDA) in Langmuir–Blodgett (LB) films, with the molecular packing well arranged by moderate preannealing, was investigated with near‐edge X‐ray absorption fine structure (NEXAFS) spectroscopy. Greenish films of polydiacetylene with an absorption wavelength of 705 nm were obtained through the photopolymerization of preannealed monomer LB films, and this resulted in an extended π‐conjugate system based on the well‐ordered monomer in a two‐dimensional arrangement. The electronic structures of the polydiacetylenes were found to be correlated to the variation of the molecular arrangements in the films from the changes in the NEXAFS spectra through photopolymerization in the LB films. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 2329–2336, 2004

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“…The one-dimensional conjugated polyenyne backbone exhibits large nonlinear optical susceptibilities comparable to inorganic semiconductors with ultrafast response time. , The conjugated polydiacetylene backbone has two spectroscopically distinct phases, designated as the blue and the red forms, that result from their exciton absorption peaks at ca. 640 and 540 nm, respectively the conjugated polyenyne backbone can undergo a drastic reversible color transition or irreversible color change from the blue to the red form.…”

Section: Introductionmentioning

confidence: 99%

Chromatic Studies of a Polymerizable Diacetylene Hydrogen Bonding Self-Assembly: A “Self-Folding” Process To Explain the Chromatic Changes of Polydiacetylenes

1999

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In the present study, a new diacetylene compound (PDATAZ), which readily forms a complementary hydrogen bonding self-assembly at the air−water interface or in the solid state with barbituric acid (BA) or cyanuric acid (CA), was designed and synthesized. The photopolymerization studies of PDATAZ and its assembly with BA or CA have revealed some important insights on the chromatic properties of polydiacetylenes. It was found that the chromatic property of polydiacetylenes is determined by whether the polymer chain is capable of adopting a linear chainlike shape. With the continuous increase of the length of the polymer chain, the original linear polyenyne backbone starts to “self-fold” to a “zigzag” structure due to the free rotation of single bonds within the polymer chain. The efficient π-electron delocalization along the polyenyne backbone is interrupted by this process, leading to a chromatic change from the blue to red form of polydiacetylenes. If there are strong intermolecular interactions existing between the polar groups of the side chains, such as the complementary hydrogen bonding network between the triaminotriazine (TAZ) moiety of the diacetylene amphiphile and its complementary components, the movement of the side chains is restricted and the folding process of the polymer backbone is inhibited. The polymer backbone is able to maintain its extended chainlike conformation, leading to only the blue form absorption band.

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Photo-and thermo-chromism in vacuum-deposited polydiacetylene films

Cited by 58 publications

References 11 publications

Self-assembly of DNA networks at the air–water interface over time

Self-assembly of DNA networks at the air–water interface over time

Changes in the near‐edge X‐ray absorption fine structure spectra of long‐chain diacetylene derivatives through photopolymerization in Langmuir–Blodgett films

Chromatic Studies of a Polymerizable Diacetylene Hydrogen Bonding Self-Assembly: A “Self-Folding” Process To Explain the Chromatic Changes of Polydiacetylenes

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