Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
NONCOVALENT SYNTHESIS OF SUPRAMOLECULAR P OLYMER ARCHITECTURES FROM SUGAR-BASED AND PEPTIDE-BASED BOLAAMPHIPHILES
Autore:
SHIMIZU T; MASUDA M; KOGISO M; ASAKAWA M;
Indirizzi:
NATL INST MAT & CHEM RES,DEPT ORGAN MAT,1-1 HIGASHI IBARAKI OSAKA 305JAPAN
Titolo Testata:
Kobunshi ronbunshu
fascicolo: 12, volume: 54, anno: 1997,
pagine: 815 - 828
SICI:
0386-2186(1997)54:12<815:NSOSPO>2.0.ZU;2-C
Fonte:
ISI
Lingua:
JPN
Soggetto:
2-DIMENSIONAL POLYMERS; MICELLAR FIBERS; MEMBRANES; ORGANOGELS; CHEMISTRY; MONOLAYER; MODEL;
Keywords:
SUGAR-BASED BOLAAMPHIPHILE; PEPTIDE-BASED BOLAAMPHIPHILE; SUPRAMOLECULAR POLYMER ARCHITECTURE; FIBROUS ASSEMBLY; EVEN-ODD EFFECT; MOLECULAR ARRANGEMENT; HYDROGEN-BONDED NETWORK; FT-IR; X-RAY DIFFRACTION; X-RAY CRYSTAL ANALYSIS; LIGHT MICROSCOPY; VESICLE-ENCAPSULATED MICROTUBE;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
47
Recensione:
Indirizzi per estratti:
Citazione:
T. Shimizu et al., "NONCOVALENT SYNTHESIS OF SUPRAMOLECULAR P OLYMER ARCHITECTURES FROM SUGAR-BASED AND PEPTIDE-BASED BOLAAMPHIPHILES", Kobunshi ronbunshu, 54(12), 1997, pp. 815-828

Abstract

Construction of fibrous polymer architectures by the self-assembling of 1-glucosamide, 1-galactosamide, and oligoglycine bolaamphiphiles has been described. The 1-glucosamide bolaamphiphiles having a D-glucoseresidue at each end, Glc-n-Glc (n=6, 9, 10, 11, 12, 13, and 14), havebeen synthesized by the condensation of 1-glucosylamine with a long chain alpha,omega-dicarboxylic acid. Self-assembled supramolecular structures in water strongly depend on whether n is even or odd, which respectively give rise to fibrous assemblies or planar platelets Is well as amorphous solids. This finding provides the first example of a stereochemical effect due to even-odd connecting links on the assemblies. Molecular arrangements and hydrogen-bonded networks of the 1-glucosamide and 1-galactosamide assemblies were investigated using FT-IR spectroscopy, X-ray diffraction, and crystal analyses. Some oligoglycine-based bolaamphiphiles having an oligoglycine residue at each end have been synthesized. Sodium salts of the bolaamphiphiles also formed fibrousassemblies in water. Light microscopy for the assemblies clearly showed that closed-end tubular structures encapsulate a large number of vesicular assemblies inside them. This is the first example of vesicle-enclosed microtubes. We also investigated the molecular arrangements and hydrogen-bonded networks within the tubes as a result of FT-W and X-ray crystal analyses. One possible mechanism of the tube formation hasbeen discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 09:29:32