Langmuir-Blodgett mono- and multilayers of poly(isocyanides)s with different sidechains

Teerenstra, M.N.; Vorenkamp, E.J.; Schouten, A.J.; Nolte, Roeland J. M.

doi:10.1016/0040-6090(91)90183-x

Cited by 22 publications

(20 citation statements)

References 15 publications

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“…Apparently, the ester group facili tates the interaction with the water subphase. This observation indicates (as w e reported previously [10]) that rigidity in itself is not a sufficient factor for obtain ing stable m onolayers at the air-water interface. In the present paper we extend our studies and present new *Kor Part I in this series see ref.…”

Section: Introductionsupporting

confidence: 58%

“…The synthesis o f PCIH is described elsewhere [12], The cleaning procedures o f the substrates and the preparation o f the gold plated glass slides have been reported previously [10]. M onolayers were studied by their pressure area isotherms using a com puter con trolled Lauda Filmbalance (FW -2).…”

Section: Methodsmentioning

confidence: 99%

“…A Langm uir-B lodgett study on different polymers and co-polym ers o f n-alkyl-isocyanides and a-methyl-alkyl isocyanides showed that the polymer helices can be oriented parallel to the air-water interface. These poly mers failed, however, to form stable m onolayers and they were not transferable to solid substrates [10].…”

Section: Introductionmentioning

confidence: 99%

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Langmuir-Blodgett films of poly(isocyanide)s with different sidechains. 2. poly(3-cholesteryl-6-isocyanohexanoate)

et al. 1992

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A poly( isocyanide). [R N -C < ]", with pendant cholesterol side groups forms stable Langmuir Blodgett (LB) monolayers at the air-water interface. At high surface pressures, the monolayers are spontaneously transformed into bilayer structures. The monolayer was transferred onto various solid substrates to form LB multilayers. FT-IR, ellipsometry and SAXS indicate that in these multilayers the polymer side chains are oriented perpendicular to the substrate surface.

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Section: Introductionsupporting

confidence: 58%

Section: Methodsmentioning

confidence: 99%

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Langmuir-Blodgett films of poly(isocyanide)s with different sidechains. 2. poly(3-cholesteryl-6-isocyanohexanoate)

et al. 1992

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“…Two general types have been successfully used for the preparation of LB films: comb-like polymers which resemble low molecular weight amphiphiles [1][2][3][4] and rigid rod polymers [5][6][7][8]. Recently, a number of studies have appeared dealing with polymeric non-linear optical (NLO) materials.…”

Section: Introductionmentioning

confidence: 99%

Mixed mono- and multilayers of poly(isocyanide)s with non-linear optically active side chains

et al. 1994

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Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. AbstractThe properties and structure of Langmuir-Blodgett mono-and multilayers of several poly(isocyanide)s with non-linear optically active side-chains were studied. These polymers formed very rigid layers or layers which appeared to be unstable. To circumvent this problem they were mixed with other poly(isocyanide)s or with amylose-butyrate. Transmission electron microscopy studies of the polymeric mixtures revealed that phase separation occurred in all cases and that only poly(isocyanide)s substituted with hydrophilic side chains formed monomolecular layers. Depending on the nature of the polymer which was used for mixing, the dye polymers could be deposited with Y-or Z-type transfer. Second-harmonic intensities generated from these films were small in the case of the Y-type multilayered films and moderately high in the case of the Z-type films.

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“…[4][5][6] However, a number of possible applications of LB films depend on the supramolecular structure of these films, and especially the alternate layer structures of two different amphiphiles (A and B) are of great interest, while by means of the alternating monolayer deposition technique, stable Y-type structures can be obtained without a plane of symmetry (noncentrosymmetric). These noncentrosymmetric multilayers are useful for or required for different applications like second-order NLO, 5,8,9 pyroelectric devices, 5,10 piezoelectric devices, 5 etc.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Alternating Multilayers of a Diacetylene Group Containing Amphiphilic Ligand and Acid, Using the Langmuir−Blodgett Technique

1997

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Fabrication of alternating multilayers of a diacetylene group containing amphiphilic ligand and acid, using the Langmuir-Blodgett technique Werkman, PJ; Wieringa, RH; Schouten, AJ The structure of alternating multilayers of two diacetylene group containing amphiphiles (an acid (A) and a pyridine ligand (B)), built up from a 5 mM CdBr2 subphase, is examined. SAXR measurements revealed that these multilayers have a regular layer structure with a bilayer spacing of 55.2 Å. From this bilayer spacing in combination with FT-IR measurements, it can be concluded that the aliphatic tails of amphiphile A have a tilt angle (R) of about 34°with respect to the surface normal, while in the case of amphiphile B, R has a value of about 45°. In the all-trans aliphatic alkyl chains of both amphiphiles, the C-C-C plane has a preferred orientation such that the symmetric stretches of the methylene groups of the aliphatic chain must be close to being in a plane parallel to the substrate. These multilayers can be partly polymerized by means of UV irradiation, forming the red form (λ max ) 540 nm) of the polymer. Upon polymerization the regular layer structure is preserved and the bilayer spacing increases from 55.2 up to 57.9 Å. The preferred orientation of the C-C-C plane of the aliphatic tail chain around the chain director is lost during the polymerization process. Also, the all-trans alkyl chain is partly converted in a more irregular one containing gauche conformations.

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Langmuir-Blodgett mono- and multilayers of poly(isocyanides)s with different sidechains

Cited by 22 publications

References 15 publications

Langmuir-Blodgett films of poly(isocyanide)s with different sidechains. 2. poly(3-cholesteryl-6-isocyanohexanoate)

Langmuir-Blodgett films of poly(isocyanide)s with different sidechains. 2. poly(3-cholesteryl-6-isocyanohexanoate)

Mixed mono- and multilayers of poly(isocyanide)s with non-linear optically active side chains

Fabrication of Alternating Multilayers of a Diacetylene Group Containing Amphiphilic Ligand and Acid, Using the Langmuir−Blodgett Technique

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