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Importance of packing coefficients of host cavities in the isomerization of open host frameworks: guest-size-dependent isomerization in cholic acid inclusion crystals with monosubstituted benzenes.

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The crystal structures of inclusion compounds of cholic acid (CA) with 28 monosubstituted benzenes have been systematically investigated. All of the crystals belong to the monoclinic space group P2(1) and have bilayer structures with one-dimensional molecular channels that can include guest

Cholic acid micelles--controlling the size of the aqueous cavity by PEGylation.

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Data show that cholic acid (CA) micelles are less densely packed and much smaller than micelles formed by typical surfactants, suggesting that CA derivatives can be used to synthesize drug nanocarriers. Presumably, the formation of internal cavities is favored by the facial characteristics of the CA

Fluorescence study of inclusion complexes between star-shaped cholic acid derivatives and polycyclic aromatic fluorescent probes and the size effects of host and guest molecules.

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Star-shaped host molecules containing two, three, and four cholic acid moieties have been used to form inclusion complexes with polycyclic aromatic hydrocarbon probes (guests) varying in size from four (pyrene) to five (benzo(e)pyrene) and seven aromatic rings (coronene) and investigated by

Effect of guest capture modes on molecular recognition by a dynamic cavity array at the air-water interface: soft vs. tight and fast vs. slow

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Dynamic aspects of molecular recognition at the air-water interface have been investigated using a monolayer of a steroid cyclophane SC(OH) which consists of the rigid 1,6,20,25-tetraaza[6.1.6.1]paracyclophane ring, connected to four steroid moieties (cholic acid) through flexible -lysine spacers.

Fabrication of a novel cholic acid modified OPE-based fluorescent film and its sensing performances to inorganic acids in acetone.

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A self-assembled monolayer (SAM)-based fluorescent film was designed and prepared by chemical immobilization of a novel oligo(p-phenylene- ethynylene) (OPE) with cholic acid moieties at the ends of its side chains (Film 1). As a control, a similar film, Film 2, of which OPE brings no side chains,

Dependence of selective enclathration on types of cholic acid crystals.

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Competitive recrystallizations of cholic acid (CA) from 1:1 binary mixtures of seven mono-substituted benzenes are demonstrated. The order of preference for guests to be incorporated into the cholic acid crystals are as follows: benzene, toluene > n-amylbenzene, n-hexylbenzene > ethylbenzene,

Gold-silver-nanoclusters having cholic acid imprinted nanoshell.

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Molecular imprinted polymers (MIPs) as a recognition element for sensors are increasingly of interest and MIP-nanoparticles have started to appear in the literature. In this study, we have proposed a novel thiol ligand-capping method with polymerizable methacryloylamido-cysteine (MAC) attached to

Controlled expansion of a molecular cavity in a steroid host compound.

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Expansion of a molecular cavity is described by using elongation of the side chain of a bile acid host compound. Bishomocholic acid (2), which has a side chain that is longer by two methylene unit than cholic acid (1), includes many organic substances at 1:1 host:guest ratios. X-ray crystallographic

In vitro selection of DNA aptamers which bind to cholic acid.

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DNA aptamers which bind to cholic acid have been identified by in vitro selection from a pool of approximately 9x10(14) DNA molecules. After 13 rounds of selection, 19 clones with 95-100 nucleotide length were sequenced. Deletion-mutant experiments and computational sequence analysis suggested that

Molecular pockets derived from cholic acid as chemosensors for metal ions.

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Molecular pockets in the form of a tripod made of cholic acid were found to be able to solubilize pyrene in polar media as a result of the facial amphiphilicity of bile acids. The trimer containing 1,2,3-triazole groups can complex with heavy metal ions, as clearly shown by electron paramagnetic

Crystal and molecular structures of the inclusion compounds of cholic acid with methanol, ethanol and 1-propanol.

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The 1:1 inclusion compounds of cholic acid with methanol (C24H40O5.CH4O), ethanol (C24H40O5.C2H6O) and 1-propanol (C24H40O5.C3H8O) crystallize in the P2(1)2(1)2(1) space group with unit-cell dimensions at 293 K: a = 15.198 (6), b = 11.625 (7), c = 14.560 (9) A; a = 14.653 (7), b = 11.739 (4), c =

Effects of cholic acid infusion in fetal lambs.

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The effects of prolonged intravenous infusions of cholic acid into fetal lambs are described in this study. The ewes (n = 10, 11 fetuses) were operated on at 114 days of gestation (term = 150 days) by placing plastic catheters in maternal and fetal vessels and in the amniotic cavity. Gestational

Organic intercalation material: reversible change in interlayer distances by guest release and insertion in sandwich-type inclusion crystals of cholic acid.

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Cholic acid (CA) forms inclusion crystals that have a sandwich-type lamellar structure constructed by the alternative stacking of host bilayers and guest layers. Five disubstituted benzenes, o-toluidine, m-fluoroaniline, o-chlorotoluene, o-bromotoluene, and indene, are accommodated in the

Invertible amphiphilic molecular pockets made of cholic acid.

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A trimer of cholic acid was prepared via a simple isocyanate linkage. Fluorescence and UV-vis spectroscopic studies showed that the same cholane trimer can form either a hydrophobic cavity in aqueous solutions or a hydrophilic cavity in an apolar solvent using pyrene and a derivative of pyrene as

Facilitated permeation of insulin across TR146 cells by cholic acid derivatives-modified elastic bilosomes.

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UNASSIGNED Buccal delivery of insulin is still a challenging issue for the researchers due to the presence of permeability barrier (buccal mucosa) in the buccal cavity. The main objective of this study was to investigate the safety, effectiveness, and potential of various liposomes containing

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