Preparation of novel polythioether dendrons on a solid supportElectronic supplementary information (ESI) available: procedures for the preparation of monomer 3, resins G1–G4, 4–8, and relevant characterisation data. See http://www.rsc.org/suppdata/cc/b3/b302324a/

Dahan, Adi; Weissberg, Avi; Portnoy, Moshe

doi:10.1039/b302324a

Cited by 35 publications

(23 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The product was extracted in chloroform. It was further recrystallized in ethylacetate/hexane (1:4) solvent mixture and dried at 25 C till constant y To whom correspondence should be addressed (Tel: +81-52-789-5911, Fax: +81-52-789-5912, E-mail: imae@nano.chem.nagoya-u.ac.jp).…”

Section: Methodsmentioning

confidence: 99%

“…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.…”

mentioning

confidence: 99%

See 1 more Smart Citation

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

Yemul

Ujihara

Maki

et al. 2005

Polym J

View full text Add to dashboard Cite

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.

show abstract

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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

Yemul

Ujihara

Maki

et al. 2005

Polym J

View full text Add to dashboard Cite

show abstract

“…Portnoy and coworkers [85] have reported the solidphase synthesis of novel polythioether dendrimers that potentially form SCS type pincer coordination sites. First to fourth generation dendrimers were assembled via a three step iterative procedure to construct the individual dendritic shells, as shown in Scheme 18.…”

Section: Organometallic Fragments In the Dendrimer Backbonementioning

confidence: 99%

Where organometallics and dendrimers merge: the incorporation of organometallic species into dendritic molecules

Chase

Gebbink

Koten

2004

Journal of Organometallic Chemistry

170

View full text Add to dashboard Cite

This review will describe the ongoing efforts being made to incorporate organometallic fragments into the framework of dendrimers. While purely dendritic organic molecules are well known and well studied, species incorporating organometallic moieties potentially offer many benefits that are not available to only organic containing dendrimers. For example, catalytic or redox active organometallic functions can be included in the dendritic framework and impart these characteristics onto the dendrimer. This report will give an overview of the latest developments in this field by highlighting selected examples that detail novel synthetic strategies or dendrimer construction methodologies, interesting practical applications or address specific problems associated with organometallic dendrimers.

show abstract

“…The reagents and conditions are as follows: (i) NaOMe and dimethylformamide; (ii) LiBH 4 , B(OMe) 3 , and tetrahydrofuran; and (iii) C 2 Cl 6 , PPh 3 , and tetrahydrofuran. 48 in breakage of the beads as a result of isobutylene and CO 2 gas bubble evolution. Increasing the length of the monomeric arms only marginally improved the situation.…”

Section: Properties Of the Dendronized Supportsmentioning

confidence: 99%

“…47 The deprotection of the thiophenolate performed in situ was followed by three steps (similar to those previously described for polyether dendrons in Scheme 9) for each generation assembly (Scheme 11). 48 The polythioether dendrons were prepared to the fourth generation. Although the analogous amine-bearing isophthalate is commercially available, its nucleophilicity is too weak to enable dendron assembly through a route analogous to those in Schemes 9 and 11.…”

Section: Other Dendritic Structuresmentioning

confidence: 99%

Dendrons and dendritic catalysts immobilized on solid support: Synthesis and dendritic effects in catalysis

Dahan

Portnoy

2004

J. Polym. Sci. A Polym. Chem.

Self Cite

View full text Add to dashboard Cite

Dendrimers, the aesthetically beautiful macromolecules displaying a variety of potentially useful architecture-induced properties, are traditionally assembled in solution. However, since 1988, a number of dendritic structures have been assembled on insoluble organic and inorganic polymers, and thus dendronized supports have been formed. One of the major applications of these new materials is in the field of heterogeneous catalysis. Supported dendritic catalytic systems, bearing the catalytic units on the dendron periphery, have been examined in the last 5 years in such reactions as hydroformylation, Heck and other Pd-catalyzed COC bond formations, oxidation, and enantioselective addition to aldehydes. In the majority of these studies, substantial dendritic effects on the reactivity, selectivity, or recyclability of the catalysts were observed. Although a number of factors have been suggested as sources of the effects, it is most likely that the phenomenon has a multicomponent origin. Additional research, including a full determination of the effects and their causes, is likely to lead to markedly better heterogeneous catalytic systems.

show abstract

Preparation of novel polythioether dendrons on a solid supportElectronic supplementary information (ESI) available: procedures for the preparation of monomer 3, resins G1–G4, 4–8, and relevant characterisation data. See http://www.rsc.org/suppdata/cc/b3/b302324a/

Abstract: A synthetic scheme for the solid-phase synthesis of unprecedented polythioether dendrons has been established, the dendrons prepared up to the fourth generation, and the applicability of the dendronized resins for supported catalysis has been demonstrated.

Cited by 35 publications

References 21 publications

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

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

Where organometallics and dendrimers merge: the incorporation of organometallic species into dendritic molecules

Dendrons and dendritic catalysts immobilized on solid support: Synthesis and dendritic effects in catalysis

Contact Info

Product

Resources

About