Polymer Complex Formation between Poly(vinylpyridines) and Poly(acrylic acid) and the Effects of UV-irradiation

Nishiyama, Satoko; Tajima, Masahiro; Yoshida, Yasuhiko

doi:10.2494/photopolymer.18.683

Cited by 11 publications

(10 citation statements)

References 20 publications

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“…Because the pyridine ring is readily protonated, Py-CN-TFMBE forms a bulky quaternary salt via a photochemical reaction. 34,35 This protonation process is also expected to frustrate the selfassembly capabilities of Py-CN-TFMBE, because the bulkiness of the pyridine salt counterions inhibits assembly. 23 Therefore, the generation of Py-CN-TFMBE NWs via the SVA-P process can be selectively frustrated, yielding a patterned array of NWs, by combining SVA-P growth with lithographic photoacid generation.…”

Section: Resultsmentioning

confidence: 99%

Selected-area in situ generation of highly fluorescent organic nanowires embedded in a polymer film: the solvent-vapor-induced self-assembly process

Chung

Hirato

et al. 2010

J. Mater. Chem.

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The preparation of highly fluorescent one-dimensional (1D) nanostructures within a selected area of a solid substrate is a challenging requirement for the realization of optoelectronic nanodevices. We present a novel method for fabricating highly fluorescent organic nanowires (NWs) embedded in a variety of polymer films through the combined processes of photochemical lithography and solventvapor annealing (SVA). To achieve this, we designed and synthesized an acid-responsive organic fluorophore bearing a self-assembly moiety. The in situ self-assembly of this fluorophore into ultralong nanowires proceeds selectively in designated regions of the polymer matrix via a simple selected-area SVA process. The I-V electrical characteristics of 2-(3 0 ,5 0 -bis(trifluoromethyl)biphenyl-4-yl)-3-(6-3,5-bis(trifluoromethyl)phenyl)pyridine-3-yl)acrylonitrile (Py-CN-TFMBE) structures, selfassembled using the SVA method, were measured on a two-terminal electrode device. This unique fabrication approach, which combines photochemical lithography and SVA, eliminates the difficulties of transferring preformed 1D organic nanostructures to fixed locations on a substrate, thereby establishing a new method for the fabrication control of optoelectronic nanodevices.

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Section: Resultsmentioning

confidence: 99%

Selected-area in situ generation of highly fluorescent organic nanowires embedded in a polymer film: the solvent-vapor-induced self-assembly process

Chung

Hirato

et al. 2010

J. Mater. Chem.

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“…Fluorescence spectra and a kind of 2-D expression of emission and excitation spectra (excitation emission matrix:EEM [9,13], once we called it as ''emission counter map'' [10][11][12], we found its generic name in Ref. [9] was determined with Hitachi F-4500 Fluorescence Spectrophotometer using a reflection configuration to decrease re-absorption of the emission [13].…”

Section: Methodsmentioning

confidence: 99%

Luminescence of Betaine-30 Dispersed in Polymeric Solids

Nishiyama¹,

Aikawa²,

Yoshida³

et al. 2006

Molecular Crystals and Liquid Crystals

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“…In our previous experiments on the UV irradiation of PVPy, a long emission band in the visible wavelength range, excited at a visible wavelength, was observed after UV irradiation, [4][5][6][7][8][9] and it was absent from those of acidtreated PVPy without UV irradiation. 6,8) To control the chemical states of PVPy surfaces, we needed to elucidate the changes occurring with UV irradiation.…”

Section: Introductionmentioning

confidence: 81%

“…1), and its derivatives. [2][3][4][5][6][7][8][9][10] Today, PVPy is often used for nanostructured materials. The first observation of pyridine (Py) fluorescence was reported in the 1970s, 11) because Py has very low fluorescence quantum yield.…”

Section: Introductionmentioning

confidence: 99%

“…Many investigations on the luminescence of PVPy concerns not only PVPy, but also its protonated species. [12][13][14][15][16][17][18][19][20][21] Protonated-PVPy is made by adding proton donors 6,8,[14][15][16][17] or photoexcitation. 12) Py moieties in PVPy and other nitrogen-containing molecules are known to form not only ionic states but also hydrogen-bonded states, and their differences in electron densities have been shown by various X-ray spectroscopies, such as X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy, and near-edge X-ray absorption fine-structure spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

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Ultraviolet Irradiation Effects on and Depth Profiles in X-ray Photoelectron Spectra of Poly(vinylpyridine) Thin Films

Nishiyama

Tajima

Nakajima

et al. 2008

jjap

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The N 1s core binding energies of spin-coated poly(vinylpyridine) (PVPy), quaternized PVPy, and UV-irradiated PVPy were determined using X-ray photoelectron spectroscopy, and the depth profiles were determined using Ar þ beam etching. In typical N 1s spectra, cationic nitrogen atoms appeared at a binding energy 2 -3 eV higher than that of neutral pyridine (Py). Changes in alkylpyridiniums in N 1s and bromide in Br 3p were determined according to etching cycles. In our PVPy cases, two types of nitrogen appeared at a region of high energy compared with that of neutral Py, and the differences in the binding energies between those states and neutral Py were all less than 2 eV. These nitrogens can be assigned to hydrogen-bonded Py and a complex formed among Py rings. Neutral Py, the complex Py, and hydrogen-bonded Py are very close together, and they were located at 399.0, 399.7, and 400.6 eV, respectively. Traces of ionic species were observed only in IR spectra.

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Polymer Complex Formation between Poly(vinylpyridines) and Poly(acrylic acid) and the Effects of UV-irradiation

Cited by 11 publications

References 20 publications

Selected-area in situ generation of highly fluorescent organic nanowires embedded in a polymer film: the solvent-vapor-induced self-assembly process

Selected-area in situ generation of highly fluorescent organic nanowires embedded in a polymer film: the solvent-vapor-induced self-assembly process

Luminescence of Betaine-30 Dispersed in Polymeric Solids

Ultraviolet Irradiation Effects on and Depth Profiles in X-ray Photoelectron Spectra of Poly(vinylpyridine) Thin Films

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