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| 2. |
- Kang, Taegon, et al.
(author)
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Facile access to internally functionalized dendrimers through efficient and orthogonal click reactions
- 2010
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In: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 46:9, s. 1556-1558
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Journal article (peer-reviewed)abstract
- A simple synthetic strategy has been developed for accessing internally functionalized dendrimers. The key feature of this approach is the use of two orthogonal and efficient reactions` epoxy-amine' and 'thiol-ene' coupling-for rapid growth of the dendritic scaffold. This sequence of reactions allows for the introduction of reactive hydroxyl groups at each dendritic layer.
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| 3. |
- Khan, Anzar, et al.
(author)
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Synthesis and characterization of hyperbranched polymers with increased chemical versatility for imprint lithographic resists
- 2008
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In: Journal of Polymer Science Part A. - : Wiley. - 0887-624X .- 1099-0518. ; 46:18, s. 6238-6254
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Journal article (peer-reviewed)abstract
- Hyperbranched polymers were prepared from a variety of mono- and difunctional monomers and used in the development of novel UV-imprint lithography (UV-IL) resists. The unique physical and chemical properties of these hyperbranched materials significantly increase the range of molecular systems that could be imprinted. Traditional challenges, such as the use of monomers that have low boiling points or the use of insoluble/highly crystalline momomers, are overcome by the preparation of hyperbranched polymers that incorporate these repeat units. In addition, the low viscosity of the hyperbranched macromolecules and the large number of reactive chain ends overcome many difficulties that are traditionally associated with the use of polymeric materials as imprint resists. Hyperbranched polymers containing up to 12 mol % pendant vinyl groups, needed for secondary crosslinking during imprinting, were prepared with a wide range of repeat unit structures and successfully imprinted with features from tens of microns to similar to 100 nm.
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| 4. |
- Montanez, Maria I., et al.
(author)
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Accelerated Growth of Dendrimers via Thiol-Ene and Esterification Reactions
- 2010
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In: Macromolecules. - : American Chemical Society (ACS). - 0024-9297 .- 1520-5835. ; 43:14, s. 6004-6013
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Journal article (peer-reviewed)abstract
- By taking advantage of the orthogonal nature of thiol-ene coupling and anhydride based esterification reactions, a facile and chemoselective strategy to dendritic macromolecules has been developed The ability to interchange growth steps based on thiol-ene and anhydride chemistry allows the synthesis of fifth-generation dendrimers in only five steps and under benign reaction conditions In addition, the presented coupling chemistries eliminate the traditional need for protection/deprotection steps and afford dendrimers in high yield and purity The modularity of this strategy coupled with the latent reactivity of the alkene/hydroxyl chain ends was demonstrated by using different cores (alkene and hydroxyl functional), various AB(2) and CD2 monomers and a range of chain end groups As a result, three dendritic libraries were prepared which exhibited tunability of both the chemical functionality and physical properties including the fabrication of PEG hydrogels.
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