Light and Oxygen Protective Properties of Materials Induced by Surfactant Molecular Complex Formation

Ichikawa, Haruyo; Iimura, Nahoko; Wakabayashi, Hiroyuki; Hirata, Hirotaka

doi:10.1006/jcis.2000.6906

Cited by 4 publications

(2 citation statements)

References 26 publications

(33 reference statements)

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“…The latter approach is well-developed and there are a number of publications describing the coupling of the substance to be protected (DNA, metal nanoparticles, quantum dots, etc.) with proteins, poly(amines), metal ions, amino acids, surfactants, antioxidants, aromatic sulfonates, and chelate agents . Embedding substances inside a microvolume was shown using lipid-based microenvironments, liposomes, microbeads, (bio)polymer capsules, amalgam capsules, emulsions and vesicles, and gels as protective microcontainers.…”

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confidence: 99%

Modified Polyelectrolyte Microcapsules as Smart Defense Systems

et al. 2004

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A new type of protective microcontainer, capable of preventing oxidation of encapsulated compounds by low molecular weight oxidizing agents, was demonstrated. These microcontainers (microcapsules) are hollow spheres with the shell made of layer-by-layer assembled polyelectrolytes with an engineered outermost layer. The protecting ability of the developed polyelectrolyte capsules was monitored by oxidation of encapsulated bovine serum albumin by H2O2 dissolved in aqueous solution. Different catalysts for H2O2 decomposition (catalase, Fe3O4 nanoparticles) were deposited onto the polyelectrolyte shell to increase the protection efficiency. The highest protection activity was observed for poly(allylamine)/poly(styrene sulfonate) capsules containing nano-Fe3O4 in the polyelectrolyte shell.

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Modified Polyelectrolyte Microcapsules as Smart Defense Systems

et al. 2004

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“…Surface Sci.,161, 249 (2000) and J. Colloid Interface Sci.,228, 32 (2000). 対する耐性も具えられることが分かった．13,14) Figure 6-1), 2) は試料を入れた容器を一旦脱気後その容器に 1 気圧で酸素ガスを充たし，完全遮光下に 60°C 並びに 80°C の 2 つの温度で保たれた…”

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Crystalline Molecular Complexes Generated between Surfactants and Various Additive Compounds: An Attempt to Modify Sparingly Water Soluble Drugs to Easily Water Soluble Drugs.

Hirata¹,

Iimura²

2001

YAKUGAKU ZASSHI

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It has been established that ionic surfactants, whether cationic or anionic, provide crystalline molecular complexes stably with various aromatic compounds as additives. Among various additives phenolic compounds are especially favorable for both surfactant species. Other than these additives, cationic surfactants easily provide crystalline molecular complexes with basic materials and even with non-polar substances such as biphenyl and phenanthrene. The isolated surfactant molecular complexes were analyzed by X-ray. To date the number of the obtained surfactant molecular complexes exceeds two hundred species or more and thirty or more of them were structurally analyzed. These surfactant molecular complexes were shown to be novel surfactant species diŠerent from their mother species, supplied with enhanced solubility to the complex additives. We applied these characteristics to sparingly water soluble drugs as the complex additive to modify them into easily water soluble drugs. The obtained complex drugs revealed an improved behavior in solubility and dissolution rate compared with pure drugs.Key words-surfactant/drug molecular complex; drug solubility enhancement; enhanced drug dissolution rate; drug characteristics modiˆcation; drug/surfactant molecular complex structur-al analysis by X-ray crystallography

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Surfactant Molecular Complexes

Hirata¹

2015

Encyclopedia of Surface and Colloid Science, Third Edition

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Light and Oxygen Protective Properties of Materials Induced by Surfactant Molecular Complex Formation

Cited by 4 publications

References 26 publications

Modified Polyelectrolyte Microcapsules as Smart Defense Systems

Modified Polyelectrolyte Microcapsules as Smart Defense Systems

Crystalline Molecular Complexes Generated between Surfactants and Various Additive Compounds: An Attempt to Modify Sparingly Water Soluble Drugs to Easily Water Soluble Drugs.

Surfactant Molecular Complexes

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