Preparation of polyimide Langmuir-Blodgett films possessing a triphenylamine unit and their application to photodiodes

Nishikata, Yasunari; Fukui, Shin ichiro; Kakimoto, Masa Aki; Imai, Yoshio; Nishiyama, Katsuhiko; Fujihira, Masamichi

doi:10.1016/0040-6090(92)90239-8

Cited by 35 publications

(16 citation statements)

References 5 publications

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“…To the best of our knowledge, the first PI containing TPA was prepared by Vasilenko et al [18] in 1991, followed by Nishikata et al [19], who prepared PIs containing TPA derivatives with a methoxy substituent in the para position. The methoxy substituent in the para position is important because TPA derivatives could be dimerised during the anodic oxidation pathway [20], which can be prevented by incorporating electron donating groups at the para position, which also creates stable cationic radicals with lower potential [21].…”

Section: Triphenylaminementioning

confidence: 99%

Recent advances in electrochromic polymers

Abidin

Zhang

Wang

et al. 2014

Polymer

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Section: Triphenylaminementioning

confidence: 99%

Recent advances in electrochromic polymers

Abidin

Zhang

Wang

et al. 2014

Polymer

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“…It is well known that porphyrins are highly conjugated organic molecules, and their properties1 are used for some functional devices, for example, photodiodes,2 catalysts,3 artificial solar energy conversion systems,4 and particularly for sensor devices 5…”

Section: Introductionmentioning

confidence: 99%

“…As reported in previous works,6 our approach to obtain this goal has been of assembling a porphyrin monolayer on a quartz surface; however, both materials and synthetic procedure are very expensive. Another strategy has been of producing thin films of copolymers containing dye units,2 but, as far as thin they could be, a part of chromophores will find inside the film and therefore unable to interact with vapors or gases.…”

Section: Introductionmentioning

confidence: 99%

Role of non‐specific DNA in reducing coding DNA requirement for transient gene expression with CHO and HEK‐293E cells

Rajendra

Kiseljak

Manoli

et al. 2012

Biotech & Bioengineering

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Transient gene expression (TGE) is a rapid method for the production of recombinant proteins in mammalian cells. While the TGE volumetric productivity has improved significantly over the past decade, the amount of plasmid DNA (pDNA) needed for transfection remains very high. Here, we examined the use of non-specific (filler) DNA to partially replace the transgene-bearing plasmid DNA (coding pDNA) in transfections of Chinese hamster ovary (CHO) and human embryo kidney (HEK-293E) cells. When the optimal amount of coding pDNA for either host was reduced by 67% and replaced with filler DNA, the recombinant protein yield decreased by only 25% relative to the yield in control transfections. Filler DNA did not affect the cellular uptake or intracellular stability of coding pDNA, but its presence lead to increases of the percentage of transfected cells and the steady-state level of transgene mRNA compared to control transfections. Studies of the physicochemical properties of DNA-polyethyleneimine (PEI) complexes with or without filler DNA did not reveal any differences in their size or surface charge. The results suggest that filler DNA allows the coding pDNA to be distributed over a greater number of DNA-PEI complexes, leading to a higher percentage of transfected cells. The co-assembly of filler DNA and coding pDNA within complexes may also allow the latter to be more efficiently utilized by the cell's transcription machinery, resulting in a higher level of transgene mRNA.

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“…In the photosynthesis of plants, photo-electron conversion occurs efficiently owing to the spatial location and orientation of the redox species, which are precisely regulated by the surrounding proteins in nanometer scale [2]. So far, many researchers have attempted to realize the highly efficient photo-electron conversion by mimicking the photosynthetic system with LB films [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%