Volume 54, Issue 45 pp. 13241-13244
Communication

Porphyrin Boxes: Rationally Designed Porous Organic Cages

Soonsang Hong

Soonsang Hong

Center for Self-assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang 790-784 (Republic of Korea) http://csc.ibs.re.kr/

Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784 (Republic of Korea)

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Dr. Md. Rumum Rohman

Dr. Md. Rumum Rohman

Center for Self-assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang 790-784 (Republic of Korea) http://csc.ibs.re.kr/

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Dr. Jiangtao Jia

Dr. Jiangtao Jia

Center for Self-assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang 790-784 (Republic of Korea) http://csc.ibs.re.kr/

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Dr. Youngkook Kim

Dr. Youngkook Kim

Center for Self-assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang 790-784 (Republic of Korea) http://csc.ibs.re.kr/

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Dr. Dohyun Moon

Dr. Dohyun Moon

Beamline Department, Pohang University of Science and Technology, Pohang 790-784 (Republic of Korea)

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Dr. Yonghwi Kim

Dr. Yonghwi Kim

Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784 (Republic of Korea)

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Dr. Young Ho Ko

Dr. Young Ho Ko

Center for Self-assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang 790-784 (Republic of Korea) http://csc.ibs.re.kr/

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Prof. Dr. Eunsung Lee

Prof. Dr. Eunsung Lee

Center for Self-assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang 790-784 (Republic of Korea) http://csc.ibs.re.kr/

Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784 (Republic of Korea)

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Prof. Dr. Kimoon Kim

Corresponding Author

Prof. Dr. Kimoon Kim

Center for Self-assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang 790-784 (Republic of Korea) http://csc.ibs.re.kr/

Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784 (Republic of Korea)

Division of Advanced Materials Science, Pohang University of Science and Technology, Pohang 790-784 (Republic of Korea)

Center for Self-assembly and Complexity (CSC), Institute for Basic Science (IBS), Pohang 790-784 (Republic of Korea) http://csc.ibs.re.kr/Search for more papers by this author
First published: 25 August 2015
Citations: 190

Graphical Abstract

Find a way: A new strategy for synthesis of shape-persistent organic cages based on porphyrins through rational design is reported. The size of cavities and windows of the organic cages can be modulated using different sized building units while maintaining the topology of the cages.

Abstract

The porphyrin boxes (PB-1 and PB-2), which are rationally designed porous organic cages with a large cavity using well-defined and rigid 3-connected triangular and 4-connected square shaped building units are reported. PB-1 has a cavity as large as 1.95 nm in diameter and shows high chemical stability in a broad pH range (4.8 to 13) in aqueous media. The crystalline nature as well as cavity structure of the shape-persistent organic cage crystals were intact even after complete removal of guest molecules, leading to one of the highest surface areas (1370 m2g−1) among the known porous organic molecular solids. The size of the cavities and windows of the porous organic cages can be modulated using different sized building units while maintaining the topology of the cages, as illustrated with PB-2. Interestingly, PB-2 crystals showed unusual N2 sorption isotherms as well as high selectivity for CO2 over N2 and CH4 (201 and 47.9, respectively at 273 K at 1 bar).

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