Supramolecular structures and process for making the same
First Claim
1. A supramolecular structure comprising:
- a multi-generation dendrimer comprising a core, a plurality of interior generations spherically disposed around the core and an outermost generation comprising a plurality of dendritic branches having terminal groups sufficiently reactive to undergo addition or substitution reactions; and
at least one cross-linkable moiety bonded to the terminal groups of each dendritic branch via a labile bond;
wherein the cross-linkable moieties of adjacent dendritic branches are intramolecularly cross-linked to form a dendrimer having an intramolecularly cross-linked peripheral surface, wherein the core dendrimer contains catalytic centers.
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Abstract
The present invention provides a supramolecular structure produced by the process comprising reacting a multi-generation dendrimer with a monomer, where the dendrimer comprises a core molecule, a plurality of interior generations spherically disposed around the core molecule and an outermost generation comprising a plurality of dendritic branches having terminal groups sufficiently reactive to undergo addition or substitution reactions, where the monomer introduces a labile bond and at least one cross-linkable moiety to the terminal groups of each dendritic branch, and where the cross-linkable moiety is bonded to the terminal group via the labile bond; crosslinking the cross-linkable moieties of adjacent dendritic branches; and cleaving the labile bonds, thereby freeing the dendrimer and forming a molecule encapsulated within a cross-linked shell molecule. The present invention further provides a process for the production of the supramolecular structures.
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Citations
14 Claims
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1. A supramolecular structure comprising:
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a multi-generation dendrimer comprising a core, a plurality of interior generations spherically disposed around the core and an outermost generation comprising a plurality of dendritic branches having terminal groups sufficiently reactive to undergo addition or substitution reactions; and
at least one cross-linkable moiety bonded to the terminal groups of each dendritic branch via a labile bond;
wherein the cross-linkable moieties of adjacent dendritic branches are intramolecularly cross-linked to form a dendrimer having an intramolecularly cross-linked peripheral surface, wherein the core dendrimer contains catalytic centers.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
R1 is selected from hydrogen and organic groups having from about 1 to about 15 carbon atoms;
R2 selected from methyl and ethyl groups;
R3 is selected from aryl and alkyl groups having from about 1 to about 15 carbon atoms;
n is a positive integer from about 10 to about 100; and
m is a positive integer from about 10 to about 100.
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10. The supramolecular structure of claim 8, wherein the double crosslinking agent is of the general formula (I):
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wherein where R1 is selected from the group consisting of hydrogen or organic groups having from about 1 to about carbon atoms, R2 is selected from the group consisting of hydrogen and organic groups having from about 1 to about 30 carbon atoms, and x is an integer from about 1 to about 4.
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11. The supramolecular structure of claim 5, wherein olefin metathesis includes the use of a ring opening metathesis polymerization (ROMP) catalyst.
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12. The supramolecular structure of claim 5, wherein olefin metathesis includes the use of a cyclic diene metathesis (ADMET) catalyst.
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13. The supramolecular structure of claim 5, wherein the coordination polymerization is Ziegler Natta polymerization.
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14. The supramolecular structure produced by claim 1, wherein the core dendrimer contains metallocores.
Specification