Synthese sternförmiger Verbindungen mit „Strahlen“ ausp-Phenylensulfid- Oligomerketten

Gingras, Marc; Pinchart, Alain; Dallaire, Carol

doi:10.1002/(sici)1521-3757(19981116)110:22<3338::aid-ange3338>3.0.co;2-p

Cited by 9 publications

(8 citation statements)

References 26 publications

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“…Phenylene sulfide molecular asterisk has 1 H NMR signals in the range of 7.37 to 6.79 ppm. 20 The theoretically calculated values range 7.1 to 6.8 ppm, which are in good agreement with observed ones. Theoretical 1 H NMR values were estimated using CS Chem 3D Ò ver.…”

Section: Synthesis Of Poly(phenylene Sulfide) Dendrimerscontrasting

confidence: 71%

“…The UV-vis and fluorescence spectral data are comparable with those of phenylene sulfide molecular asterisk. 20,21 However, in the present study, the spectral bands are blue-shifted due to small number of phenylene sulfide linkages or groups than that in reported molecular asterisk.…”

Section: Synthesis Of Poly(phenylene Sulfide) Dendrimersmentioning

confidence: 99%

“…10,11 They have variety of applications from multisite catalyst, 12 multivalent glycodendrimers, 13,14 fluorescent biosensors, new conducting materials, 15 to best candidates for self assembled monolayers on gold and silver surfaces for smart materials. 16,17 Researchers have tried to synthesize the hyperbranched poly-(phenylene sulfide), 18,19 phenylene sulfide molecular asterisks 20,21 oligo(m-phenylene sulfide)s [22][23][24] and solid supported poly(thioether) dendron. 25 In present work we report the synthesis of novel poly(phenylene sulfide) dendrimers and carboxy focal poly(phenylene sulfide) dendrons by nucleophilic synthesis method and film formation of dendrimers and dendrons on mica surface.…”

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confidence: 99%

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Synthesis and Film Formation of Poly(phenylene sulfide) Dendrimers and Dendrons

Yemul

Ujihara

Maki

et al. 2005

Polym J

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ABSTRACT:Poly(phenylene sulfide) dendrimers up to fourth generation were synthesized by divergent method from 1,3,5-tris(4-chloro-phenylene-1-thio)benzene. All the dendrimers are soluble in polar organic solvents at room temperature. The chemical structures at the synthesis steps were confirmed by spectroscopic method. X-Ray diffraction study revealed that all dendrimers are semi-crystalline in nature. Carboxy focal poly(phenylene sulfide) dendrons were synthesized up to second generation by divergent method from 3,5-dichlorobenzoicacid. On surface pressure-area isotherm at air-water interface, third generation poly(phenylene sulfide) dendrimer displayed hysteresis. Its occupied surface area was smaller than the calculated values as well as a case of second generation poly(phenylene sulfide) dendron. Atomic force microscopic images of their LB films presented accumulation and aggregation of molecular layers. On the other hand, adsorption films of dendrimer and dendron were fundamentally monolayer. Molecular arrangements in the LB and adsorption films and the driving forces of the film formation were discussed.

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Section: Synthesis Of Poly(phenylene Sulfide) Dendrimerscontrasting

confidence: 71%

Section: Synthesis Of Poly(phenylene Sulfide) Dendrimersmentioning

confidence: 99%

mentioning

confidence: 99%

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Synthesis and Film Formation of Poly(phenylene sulfide) Dendrimers and Dendrons

Yemul

Ujihara

Maki

et al. 2005

Polym J

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“…Some questions were raised because of the low solubility in most solvents, which was in contrast to authentic samples reported later. Emphasis on the development and properties of molecular asterisks or star‐shaped supramolecules containing a persulfurated aromatic core (benzene or coronene) was reported in 1998 35a. The convergent assembly relied on the facile persulfuration of hexachlorobenzene or dodecachlorocoronene with poly( p ‐phenylene) sulfide oligomers having a terminal sulfydryl group.…”

Section: Supramolecular Chemistry and Organometallic Assembliesmentioning

confidence: 99%

Persulfurated Aromatic Compounds

2006

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Persulfurated arenes have been known for about 50 years but they were underexploited in chemistry in spite of facile, mild, and high-yielding syntheses. Their properties (redox potentials, UV/Vis absorption, conductivity, nonlinear optical properties, etc.) are mainly due to the aromaticity of the ring with sp2-hybridized carbon atoms and to the electronic contribution from numerous divalent sulfur ligands, which also stabilize negative or positive charges. The characteristic conformational patterns of the sulfur ligands often facilitate preorganization in supramolecular assemblies, with or without thiophilic metal cations, for designing redox sensors, ion-selective membranes, clathrates, organic conductors, nonlinear optical materials, liquid crystals, coordination polymers, and bioinorganic systems. A new class of supramolecules with various molecular shapes such as asterisks, chains, wheels, and windmills were reported.

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“…Die Tatsache, dass diese Verbindungen in späteren Untersuchungen weit niedrigere Löslichkeiten aufwiesen als ursprünglich berichtet, warf jedoch einige Fragen auf. Aus diesem Grund synthetisierten wir eine Reihe von sternförmigen Supermolekülen mit persulfuriertem aromatischem Kern (Benzol oder Coronen) und untersuchten ihre Eigenschaften 35a. Die konvergente Synthese beruhte auf der leichten Persulfurierung von Hexachlorbenzol oder Dodecachlorcoronen mit Poly( p ‐phenylensulfid)‐Oligomeren (PPS), die eine terminale Sulfanylgruppe tragen.…”

Section: Supramolekulare Und Metallorganische Aggregateunclassified

Persulfurierte aromatische Verbindungen

2006

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Persulfurierte Arene sind zwar schon seit etwa 50 Jahren bekannt, ihre Chemie ist aber trotz der einfachen und effizienten Synthesen unter milden Bedingungen nur unzureichend untersucht. Ihre Eigenschaften (Redoxpotentiale, UV/Vis‐Absorption, Leitfähigkeit, nichtlineare optische Eigenschaften) sind einerseits auf die Aromatizität des Rings mit sp2‐hybridisierten Kohlenstoffatomen und andererseits auf den elektronischen Beitrag der divalenten Schwefelsubstituenten zurückzuführen, die auch negative oder positive Ladungen stabilisieren können. Die charakteristischen Konformationsmuster der Schwefelliganden ermöglichen häufig die Präorganisation zu supramolekularen Aggregaten mit oder ohne thiophile Metallkationen. Anwendungen solcher Spezies finden sich in der Entwicklung von Redoxsensoren, ionenselektiven Membranen, Clathraten, organischen Leitern, nichtlinearen optischen Materialien, Flüssigkristallen, Koordinationspolymeren und bioanorganischen Systemen. Darüber hinaus wurde eine neue Klasse von Supermolekülen mit verschiedenen Molekülformen wie Sternen, Ketten, Rädern und Windmühlen beschrieben.

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Synthese sternförmiger Verbindungen mit „Strahlen“ ausp-Phenylensulfid- Oligomerketten

Cited by 9 publications

References 26 publications

Synthesis and Film Formation of Poly(phenylene sulfide) Dendrimers and Dendrons

Synthesis and Film Formation of Poly(phenylene sulfide) Dendrimers and Dendrons

Persulfurated Aromatic Compounds

Persulfurierte aromatische Verbindungen

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