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Porous organic cages

Porous organic cages
Porous organic cages
Porous materials are important in a wide range of applications including molecular separations and catalysis. We demonstrate that covalently bonded organic cages can assemble into crystalline microporous materials. The porosity is prefabricated and intrinsic to the molecular cage structure, as opposed to being formed by non-covalent self-assembly of non-porous sub-units. The three-dimensional connectivity between the cage windows is controlled by varying the chemical functionality such that either non-porous or permanently porous assemblies can be produced. Surface areas and gas uptakes for the latter exceed comparable molecular solids. One of the cages can be converted by recrystallization to produce either porous or non-porous polymorphs with apparent Brunauer–Emmett–Teller surface areas of 550 and 23 m2 g-1, respectively. These results suggest design principles for responsive porous organic solids and for the modular construction of extended materials from prefabricated molecular pores.
1476-1122
973-978
Tozawa, Tomokazu
98ee945c-ed85-4235-bd74-5d996f58f4e8
Jones, James T.A.
bda2c4c2-7673-4efd-8a88-02d036f2b8db
Swamy, Shashikala I.
a80ca002-1af6-42f5-b6e9-714a691b8615
Jiang, Shan
708164e1-e9e8-4908-a20c-573e6401449f
Adams, Dave J.
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Shakespeare, Stephen
24378b24-7cf1-40b6-af61-04f3755074c6
Clowes, Rob
11e42a35-d9b1-44be-84af-10a5bac63b00
Bradshaw, Darren
7677b11e-1961-447e-b9ba-4847a74bd4dd
Hasell, Tom
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Chong, Samantha Y.
2e23eea0-c8eb-48bb-8e69-7f3a50d0e812
Tang, Chiu
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Thompson, Stephen
0af6043a-33ad-47c9-a4cc-8485aa3c4ee5
Parker, Julia
d138fc83-dd5b-490e-b7c3-bb1dcf5e3f7a
Trewin, Abbie
b3c7ad9a-f460-48cd-b532-1a44d69f4854
Bacsa, John
8877bf1f-d692-4526-b61e-ee3f3c053204
Slawin, Alexandra M.Z.
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Steiner, Alexander
90c4fb4a-d977-448d-91c6-e38338d4e4d2
Cooper, Andrew I.
95618a3b-7f3f-4731-a0d4-0a7b7ce07302
Tozawa, Tomokazu
98ee945c-ed85-4235-bd74-5d996f58f4e8
Jones, James T.A.
bda2c4c2-7673-4efd-8a88-02d036f2b8db
Swamy, Shashikala I.
a80ca002-1af6-42f5-b6e9-714a691b8615
Jiang, Shan
708164e1-e9e8-4908-a20c-573e6401449f
Adams, Dave J.
d95e4f11-7580-43cb-802d-ad8ac0161c8a
Shakespeare, Stephen
24378b24-7cf1-40b6-af61-04f3755074c6
Clowes, Rob
11e42a35-d9b1-44be-84af-10a5bac63b00
Bradshaw, Darren
7677b11e-1961-447e-b9ba-4847a74bd4dd
Hasell, Tom
6c8f5286-f4e2-456e-a3cd-dcfd3d164e52
Chong, Samantha Y.
2e23eea0-c8eb-48bb-8e69-7f3a50d0e812
Tang, Chiu
0a4041a4-9937-45ec-af54-791256b79283
Thompson, Stephen
0af6043a-33ad-47c9-a4cc-8485aa3c4ee5
Parker, Julia
d138fc83-dd5b-490e-b7c3-bb1dcf5e3f7a
Trewin, Abbie
b3c7ad9a-f460-48cd-b532-1a44d69f4854
Bacsa, John
8877bf1f-d692-4526-b61e-ee3f3c053204
Slawin, Alexandra M.Z.
45b99a30-c91c-4306-be37-6b7b0ec0affd
Steiner, Alexander
90c4fb4a-d977-448d-91c6-e38338d4e4d2
Cooper, Andrew I.
95618a3b-7f3f-4731-a0d4-0a7b7ce07302

Tozawa, Tomokazu, Jones, James T.A., Swamy, Shashikala I., Jiang, Shan, Adams, Dave J., Shakespeare, Stephen, Clowes, Rob, Bradshaw, Darren, Hasell, Tom, Chong, Samantha Y., Tang, Chiu, Thompson, Stephen, Parker, Julia, Trewin, Abbie, Bacsa, John, Slawin, Alexandra M.Z., Steiner, Alexander and Cooper, Andrew I. (2009) Porous organic cages. Nature Materials, 8 (12), 973-978. (doi:10.1038/NMAT2545). (PMID:19855385)

Record type: Article

Abstract

Porous materials are important in a wide range of applications including molecular separations and catalysis. We demonstrate that covalently bonded organic cages can assemble into crystalline microporous materials. The porosity is prefabricated and intrinsic to the molecular cage structure, as opposed to being formed by non-covalent self-assembly of non-porous sub-units. The three-dimensional connectivity between the cage windows is controlled by varying the chemical functionality such that either non-porous or permanently porous assemblies can be produced. Surface areas and gas uptakes for the latter exceed comparable molecular solids. One of the cages can be converted by recrystallization to produce either porous or non-porous polymorphs with apparent Brunauer–Emmett–Teller surface areas of 550 and 23 m2 g-1, respectively. These results suggest design principles for responsive porous organic solids and for the modular construction of extended materials from prefabricated molecular pores.

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More information

e-pub ahead of print date: 25 October 2009
Published date: December 2009
Organisations: Chemistry

Identifiers

Local EPrints ID: 340216
URI: http://eprints.soton.ac.uk/id/eprint/340216
ISSN: 1476-1122
PURE UUID: 45bbc441-0216-49e7-a142-04419b87fb80
ORCID for Darren Bradshaw: ORCID iD orcid.org/0000-0001-5258-6224

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Date deposited: 15 Jun 2012 11:28
Last modified: 15 Sep 2021 01:58

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Contributors

Author: Tomokazu Tozawa
Author: James T.A. Jones
Author: Shashikala I. Swamy
Author: Shan Jiang
Author: Dave J. Adams
Author: Stephen Shakespeare
Author: Rob Clowes
Author: Darren Bradshaw ORCID iD
Author: Tom Hasell
Author: Samantha Y. Chong
Author: Chiu Tang
Author: Stephen Thompson
Author: Julia Parker
Author: Abbie Trewin
Author: John Bacsa
Author: Alexandra M.Z. Slawin
Author: Alexander Steiner
Author: Andrew I. Cooper

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