Phase transition in glycolipid monolayers induced by attractions between oligosaccharide head groups

Kaoru Tamada; Hiroyuki Minamikawa; Masakatsu Hato; Kenjiro Miyano

doi:10.1021/la9503257

Phase transition in glycolipid monolayers induced by attractions between oligosaccharide head groups

Kaoru Tamada, Hiroyuki Minamikawa, Masakatsu Hato, Kenjiro Miyano

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46 Citations (Scopus)

Abstract

The surface property of two kinds of synthetic glyceroglycolipids was investigated to confirm the stereoeffect of sugar residues on the phase behavior in monolayers: one is the maltooligosaccharide-containing lipids [Mal_N(C₁₂)₂] and the other is cellooligosaccharide-containing lipids [Cel_N(C₁₂)₂]. The two kinds of glycolipids exhibit the opposite dependence of the surface pressure - area (II-A) isotherm on the number of glucose residues (N), in that Mal_N(C₁₂)₂ tends to be more expanded as N increases, while Cel_N(C₁₂)₂ tends to be more condensed. The liquid-expanded/liquid-condensed phase transition in Cel₄(C₁₂)₂ was evaluated by the Brewster angle microscopy and the latent heat analysis with the Clausius - Clapeyron equation, as a model of film condensation induced by the attraction between oligosaccharide head groups. The film morphology of Cel₄(C₁₂)₂ was unique in that it exhibits the optically isotropic and flexible fluid type of the LC phase, while Glc(C₁₆)₂ forms a two-dimensional tilted crystalline phase in the same way as fatty acids and phospholipids. The heat of transition (ΔH) of Cel₄(C₁₂)₂ does not converge toward zero even at high temperature. In other words, the main transition of Cel₄(C₁₂)₂ does not become second order in contrast to the behavior usually encountered in monolayers. The refractive index of the oligosaccharide head groups in water as well as the alkyl chains in air must be properly taken into account to interpret the reflectivity.

Original language	English
Pages (from-to)	1666-1674
Number of pages	9
Journal	Langmuir
Volume	12
Issue number	6
DOIs	https://doi.org/10.1021/la9503257
Publication status	Published - Mar 20 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la9503257

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@article{31b8c054fa274a3aad026e03ce267d58,

title = "Phase transition in glycolipid monolayers induced by attractions between oligosaccharide head groups",

abstract = "The surface property of two kinds of synthetic glyceroglycolipids was investigated to confirm the stereoeffect of sugar residues on the phase behavior in monolayers: one is the maltooligosaccharide-containing lipids [MalN(C12)2] and the other is cellooligosaccharide-containing lipids [CelN(C12)2]. The two kinds of glycolipids exhibit the opposite dependence of the surface pressure - area (II-A) isotherm on the number of glucose residues (N), in that MalN(C12)2 tends to be more expanded as N increases, while CelN(C12)2 tends to be more condensed. The liquid-expanded/liquid-condensed phase transition in Cel4(C12)2 was evaluated by the Brewster angle microscopy and the latent heat analysis with the Clausius - Clapeyron equation, as a model of film condensation induced by the attraction between oligosaccharide head groups. The film morphology of Cel4(C12)2 was unique in that it exhibits the optically isotropic and flexible fluid type of the LC phase, while Glc(C16)2 forms a two-dimensional tilted crystalline phase in the same way as fatty acids and phospholipids. The heat of transition (ΔH) of Cel4(C12)2 does not converge toward zero even at high temperature. In other words, the main transition of Cel4(C12)2 does not become second order in contrast to the behavior usually encountered in monolayers. The refractive index of the oligosaccharide head groups in water as well as the alkyl chains in air must be properly taken into account to interpret the reflectivity.",

author = "Kaoru Tamada and Hiroyuki Minamikawa and Masakatsu Hato and Kenjiro Miyano",

year = "1996",

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T1 - Phase transition in glycolipid monolayers induced by attractions between oligosaccharide head groups

AU - Tamada, Kaoru

AU - Minamikawa, Hiroyuki

AU - Hato, Masakatsu

AU - Miyano, Kenjiro

PY - 1996/3/20

Y1 - 1996/3/20

N2 - The surface property of two kinds of synthetic glyceroglycolipids was investigated to confirm the stereoeffect of sugar residues on the phase behavior in monolayers: one is the maltooligosaccharide-containing lipids [MalN(C12)2] and the other is cellooligosaccharide-containing lipids [CelN(C12)2]. The two kinds of glycolipids exhibit the opposite dependence of the surface pressure - area (II-A) isotherm on the number of glucose residues (N), in that MalN(C12)2 tends to be more expanded as N increases, while CelN(C12)2 tends to be more condensed. The liquid-expanded/liquid-condensed phase transition in Cel4(C12)2 was evaluated by the Brewster angle microscopy and the latent heat analysis with the Clausius - Clapeyron equation, as a model of film condensation induced by the attraction between oligosaccharide head groups. The film morphology of Cel4(C12)2 was unique in that it exhibits the optically isotropic and flexible fluid type of the LC phase, while Glc(C16)2 forms a two-dimensional tilted crystalline phase in the same way as fatty acids and phospholipids. The heat of transition (ΔH) of Cel4(C12)2 does not converge toward zero even at high temperature. In other words, the main transition of Cel4(C12)2 does not become second order in contrast to the behavior usually encountered in monolayers. The refractive index of the oligosaccharide head groups in water as well as the alkyl chains in air must be properly taken into account to interpret the reflectivity.

AB - The surface property of two kinds of synthetic glyceroglycolipids was investigated to confirm the stereoeffect of sugar residues on the phase behavior in monolayers: one is the maltooligosaccharide-containing lipids [MalN(C12)2] and the other is cellooligosaccharide-containing lipids [CelN(C12)2]. The two kinds of glycolipids exhibit the opposite dependence of the surface pressure - area (II-A) isotherm on the number of glucose residues (N), in that MalN(C12)2 tends to be more expanded as N increases, while CelN(C12)2 tends to be more condensed. The liquid-expanded/liquid-condensed phase transition in Cel4(C12)2 was evaluated by the Brewster angle microscopy and the latent heat analysis with the Clausius - Clapeyron equation, as a model of film condensation induced by the attraction between oligosaccharide head groups. The film morphology of Cel4(C12)2 was unique in that it exhibits the optically isotropic and flexible fluid type of the LC phase, while Glc(C16)2 forms a two-dimensional tilted crystalline phase in the same way as fatty acids and phospholipids. The heat of transition (ΔH) of Cel4(C12)2 does not converge toward zero even at high temperature. In other words, the main transition of Cel4(C12)2 does not become second order in contrast to the behavior usually encountered in monolayers. The refractive index of the oligosaccharide head groups in water as well as the alkyl chains in air must be properly taken into account to interpret the reflectivity.

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Phase transition in glycolipid monolayers induced by attractions between oligosaccharide head groups

Abstract

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