Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Novel Macrothiols for the Synthesis of a Structurally Comprehensive Dendritic Library using Thiol-Ene Click Chemistry
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik.
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik.
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik.ORCID-id: 0000-0002-9372-0829
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik.ORCID-id: 0000-0002-9200-8004
2011 (engelsk)Inngår i: Journal of Polymer Science Part A: Polymer Chemistry, ISSN 0887-624X, E-ISSN 1099-0518, Vol. 49, nr 13, s. 2990-2995Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The authors are grateful to the Swedish Research Council (VR) for its financial support (grants 2008-5609, 2006-3617, and 2009-3259).

sted, utgiver, år, opplag, sider
2011. Vol. 49, nr 13, s. 2990-2995
Emneord [en]
click chemistry, dendrimers, dendritic-linear hybrids, dendronized polymer, macromonomers, polyesters, thiols
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-35128DOI: 10.1002/pola.24742ISI: 000291363200026Scopus ID: 2-s2.0-79957958713OAI: oai:DiVA.org:kth-35128DiVA, id: diva2:426454
Merknad
QC 20110623 Tilgjengelig fra: 2011-06-23 Laget: 2011-06-20 Sist oppdatert: 2017-12-11bibliografisk kontrollert
Inngår i avhandling
1. Novel Porous Films from Functional and Biocompatible Linear-Dendritic Hybrids
Åpne denne publikasjonen i ny fane eller vindu >>Novel Porous Films from Functional and Biocompatible Linear-Dendritic Hybrids
2013 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

In the last decades, the fabrication of ordered nano- and microporous structures has attracted increasing interest due to their specific properties and multiple possible applications in electronics, as templates or in the biological field. The development of such materials has been favored by the introduction of the simple breath-figure templating method in the 1990’s. In order to fully exploit the potential of these porous materials, the use of advanced functional molecules as precursors is essential. One suitable class of molecules is the well-defined linear-dendritic hybrids (LD hybrids) family. The structural variations, multiple end-groups and possible amphiphilicity of these molecules are significant advantages that could lead to highly sophisticated functional materials with potential usage in biology. Therefore, this project was directed towards the synthesis of advanced LD hybrids and the evaluation of their ability to form ordered functional porous films.

A degradation and toxicity study was initially conducted on polyester-based 2,2-bis(methylol)propionic acid (bis-MPA) dendrimers under physiological conditions to support the potential usage of these molecules for biological purposes. The materials were found to undergo a relatively fast depolymerization process at pH 7.5. Moreover, the initial dendrimer and its decomposition products were proven to be non-toxic for immune competent cells, allowing for the utilization of these molecules for biological applications.

A linear-dendritic-linear hybrid library was successfully synthesized from biocompatible poly(ethylene glycol) (PEG), poly(ε-caprolactone) (PCL) and bis-MPA building blocks using a combination of ring-opening polymerization (ROP)and copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC). The materials, consisting of one long PEG block connected to the focal point of the dendron and several PCL arms attached at its periphery, were used to construct ordered porous films using the breath figure method. The polymeric architecture strongly affected the ordering of the films with a more regular morphology obtained from a more flexible polymer. Changing the semi-crystalline PCL to amorphous polylactide (PLA) also permitted the formation of porous arrays. Interestingly, films obtained from inverted structures possessing one long PCL block and several short PEG chains, also presented a regular morphology. Moreover they could be activated to exhibit multiple surface hydroxyl groups.

To increase the number of orthogonal synthetic methodologies available for the preparation of advanced macromolecules, high molecular weight dendritic macrothiols were synthesized. These molecules were efficiently coupled to a number of core molecules via thiol-ene coupling, generating a comprehensive library of dendritic materials. This approach represents an attractive alternative to the commonly used, but potentially toxic, CuAAC.

Exploiting the obtained results, a final LD hybrid was synthesized from atom transfer radical polymerization (ATRP) of 2-hydroxyethyl methacrylate (HEMA) derivatives and thiol-ene coupling (TEC) with macrothiols. This macromolecule was successfully utilized to form functional ordered porous arrays and the availability of peripheral alkyne functional groups was demonstrated by efficient coupling with fluorescent Rhodamine-B. The HEMA-backbone allowed for the introduction of cross-linkable azide groups that were used to significantly improve the thermal stability of the films from 50 °C to 200 °C. These materials have the potential to be used in applications such as catalysis, in medicine and as sensors.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2013. s. 62
Serie
Trita-CHE-Report, ISSN 1654-1081 ; 2013:15
Emneord
poly(ethylene glycol), poly(caprolactone), linear-dendritic hybrid; click chemistry, CuAAC, thiol-ene chemistry, amphiphilic polymer, honeycomb film, isoporous film, thiol, dendrimer
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-119985 (URN)978-91-7501-691-7 (ISBN)
Disputas
2013-04-19, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Forskningsfinansiär
Swedish Research Council
Merknad

QC 20130327

Tilgjengelig fra: 2013-03-27 Laget: 2013-03-26 Sist oppdatert: 2013-03-27bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Personposter BETA

Hult, AndersMalkoch, Michael

Søk i DiVA

Av forfatter/redaktør
Walter, Marie V.Lundberg, PontusHult, AndersMalkoch, Michael
Av organisasjonen
I samme tidsskrift
Journal of Polymer Science Part A: Polymer Chemistry

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 269 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf