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Liang J, Nuhnen A, Millan S, Breitzke H, Gvilava V, Buntkowsky G, Janiak C. Encapsulation of a Porous Organic Cage into the Pores of a Metal-Organic Framework for Enhanced CO 2 Separation. Angew Chem Int Ed Engl 2020; 59:6068-6073. [PMID: 31912916 PMCID: PMC7187261 DOI: 10.1002/anie.201916002] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Indexed: 12/25/2022]
Abstract
We present a facile approach to encapsulate functional porous organic cages (POCs) into a robust MOF by an incipient-wetness impregnation method. Porous cucurbit[6]uril (CB6) cages with high CO2 affinity were successfully encapsulated into the nanospace of Cr-based MIL-101 while retaining the crystal framework, morphology, and high stability of MIL-101. The encapsulated CB6 amount is controllable. Importantly, as the CB6 molecule with intrinsic micropores is smaller than the inner mesopores of MIL-101, more affinity sites for CO2 are created in the resulting CB6@MIL-101 composites, leading to enhanced CO2 uptake capacity and CO2 /N2 , CO2 /CH4 separation performance at low pressures. This POC@MOF encapsulation strategy provides a facile route to introduce functional POCs into stable MOFs for various potential applications.
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Affiliation(s)
- Jun Liang
- Hoffmann Institute of Advanced MaterialsShenzhen Polytechnic7098 Liuxian BlvdNanshan DistrictShenzhen518055China
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf40204DüsseldorfGermany
| | - Alexander Nuhnen
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf40204DüsseldorfGermany
| | - Simon Millan
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf40204DüsseldorfGermany
| | - Hergen Breitzke
- Eduard-Zintl-Institut für Anorganische und Physikalische ChemieTechnische Universität DarmstadtAlarich-Weiss-Straße 464287DarmstadtGermany
| | - Vasily Gvilava
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf40204DüsseldorfGermany
| | - Gerd Buntkowsky
- Eduard-Zintl-Institut für Anorganische und Physikalische ChemieTechnische Universität DarmstadtAlarich-Weiss-Straße 464287DarmstadtGermany
| | - Christoph Janiak
- Hoffmann Institute of Advanced MaterialsShenzhen Polytechnic7098 Liuxian BlvdNanshan DistrictShenzhen518055China
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf40204DüsseldorfGermany
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52
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Kirila T, Smirnova A, Razina A, Tenkovtsev A, Filippov A. Synthesis and Conformational Characteristics of Thermosensitive Star-Shaped Six-Arm Polypeptoids. Polymers (Basel) 2020; 12:polym12040800. [PMID: 32260090 PMCID: PMC7240544 DOI: 10.3390/polym12040800] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/25/2020] [Accepted: 03/28/2020] [Indexed: 11/16/2022] Open
Abstract
Star-shaped six-arm poly-2-alkyl-2-oxazine and poly-2-alkyl-2-oxazoline with hexaaza [26]orthoparacyclophane derivative core were synthesized successfully using cationic ring-opening polymerization. Conformational behavior of prepared polymer stars were investigated by the methods of molecular hydrodynamics and optics in molecular dispersed solutions. It was shown that conformation characteristics of star-shaped polypeptoids depends on arm length, while the chemical structure weakly affects the behavior of the studied polymers in solutions. This behavior is caused by the close equilibrium rigidity of arms. The star-shaped polypeptoids have relatively high intramolecular density. All synthesized stars exhibit LCST behavior. Phase separation temperature depends on arm structure. It is lower for poly-2-alkyl-2-oxazines, monomer units of which contains one methylene group more than monomers of poly-2-alkyl-2-oxazoline.
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53
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Tashiro S, Shionoya M. Novel Porous Crystals with Macrocycle-Based Well-Defined Molecular Recognition Sites. Acc Chem Res 2020; 53:632-643. [PMID: 31970991 DOI: 10.1021/acs.accounts.9b00566] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Molecular recognition is one of the fundamental events in biological systems, as typified by enzymes that enable highly efficient and selective catalytic reactions through precise recognition of substrate(s) and cofactor(s) in the binding pockets. Chemists therefore have long been inspired by such excellent molecular systems to develop various synthetic receptors with well-defined binding sites. Their effort is currently being devoted to the construction of not only molecular receptors but also self-assembled host compounds possessing connected cavities (pores) in the crystalline frameworks to rationally design functional porous materials capable of efficiently adsorbing molecules or ions at binding sites on the pore walls. However, it is still challenging to design multiple distinct binding sites that are precisely arranged in an identical framework, which is currently one of the most important targets in this field to realize elaborate molecular systems beyond natural enzymes.In this Account, we provide an overview of porous crystals with well-defined molecular recognition sites. We first show several strategies for arranging macrocyclic binding sites in crystalline frameworks such as metal-organic frameworks, porous molecular crystals, and covalent organic frameworks. Porous metal-macrocycle frameworks (MMFs) that we have recently developed are then described as a new type of porous crystals with well-defined multiple distinct binding sites. The MMF-1 crystal, which was developed first and is composed of four stereoisomers of helical PdII3-macrocycle complexes, has one-dimensional channels with dimensions of 1.4 nm × 1.9 nm equipped with enantiomeric pairs of five distinct binding sites. This structural feature of MMF-1 therefore allows for site-selective and asymmetric arrangement of not only single but also multiple guest molecules in the crystalline channels based on molecular recognition between the guests and the multiple binding sites. This characteristic was also exploited to develop a heterogeneous catalyst by non-covalently immobilizing an organic acid on the pore surface of MMF-1 to conduct size-specific catalytic reactions. In addition, adsorption of a photoreactive substrate in MMF was found to switch the photoreaction pathway to cause another reaction with the aid of photoactivated PdII centers arranged on the pore walls. Furthermore, the dynamic, transient process of molecular arrangement incorporated in MMF-1 has been successfully visualized by single-crystal X-ray diffraction analysis. The formation of homochiral MMF-2 composed of only (P)- or (M)-helical PdII3-macrocycle complexes is also described. Thus, macrocycle-based porous crystals with a complex structure such as MMFs are expected to serve as novel porous materials that have great potential to mimic or surpass enzymes by utilizing well-defined multiple binding sites capable of spatially arranging a catalyst, substrate, and effector for highly selective and allosterically tunable catalytic reactions, which can be also visualized by crystallographic analysis because of their crystalline nature.
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Affiliation(s)
- Shohei Tashiro
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Liang J, Nuhnen A, Millan S, Breitzke H, Gvilava V, Buntkowsky G, Janiak C. Encapsulation of a Porous Organic Cage into the Pores of a Metal–Organic Framework for Enhanced CO
2
Separation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jun Liang
- Hoffmann Institute of Advanced MaterialsShenzhen Polytechnic 7098 Liuxian Blvd Nanshan District Shenzhen 518055 China
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Alexander Nuhnen
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Simon Millan
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Hergen Breitzke
- Eduard-Zintl-Institut für Anorganische und Physikalische ChemieTechnische Universität Darmstadt Alarich-Weiss-Straße 4 64287 Darmstadt Germany
| | - Vasily Gvilava
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Gerd Buntkowsky
- Eduard-Zintl-Institut für Anorganische und Physikalische ChemieTechnische Universität Darmstadt Alarich-Weiss-Straße 4 64287 Darmstadt Germany
| | - Christoph Janiak
- Hoffmann Institute of Advanced MaterialsShenzhen Polytechnic 7098 Liuxian Blvd Nanshan District Shenzhen 518055 China
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
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Zhou Y, Kan L, Eubank JF, Li G, Zhang L, Liu Y. Self-assembly of two robust 3D supramolecular organic frameworks from a geometrically non-planar molecule for high gas selectivity performance. Chem Sci 2019; 10:6565-6571. [PMID: 31367308 PMCID: PMC6615216 DOI: 10.1039/c9sc00290a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 05/27/2019] [Indexed: 02/03/2023] Open
Abstract
Two 3D SOFs were synthesized based on a ‘direction-oriented’ strategy. The unique and permanent porosity structures exhibit remarkable ability to separate CO2 from N2 and light hydrocarbons.
The synthesis of highly porous frameworks has received continuous research interest, but achieving the ability to target stable and selective materials remains challenging. Herein, by utilizing a ‘direction-oriented’ strategy and modulating reaction conditions, two novel 3D porous supramolecular organic framework (SOF) materials (JLU-SOF2 and JLU-SOF3, as isomers) are assembled from a non-planar building block (TMBTI = 2,4,6-trimethyl benzene-1,3,5-triyl-isophthalic acid) and they display permanent porosity, high thermal stability, and good recyclability. It is worth mentioning that the CO2 uptake values of JLU-SOF2 and JLU-SOF3 rank among the highest values for SOF-based materials under ambient conditions. Furthermore, these two materials exhibit preferential adsorption of CO2 over N2 and CH4, and can effectively separate the mixtures of light hydrocarbons. These studies indicate the possible application of JLU-SOF2 and JLU-SOF3 in trapping greenhouse gases and upgrading natural gas. In addition, this synthetic strategy introduces an effective method for developing remarkable 3D SOFs among other framework materials.
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Affiliation(s)
- Yue Zhou
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , College of Chemistry , Jilin University , Changchun 130012 , P. R. China . ; ; Tel: +86-431-85168614
| | - Liang Kan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , College of Chemistry , Jilin University , Changchun 130012 , P. R. China . ; ; Tel: +86-431-85168614
| | - Jarrod F Eubank
- Florida Southern College , 111 Lake Hollingsworth Dr , Lakeland , FL , USA 33801
| | - Guanghua Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , College of Chemistry , Jilin University , Changchun 130012 , P. R. China . ; ; Tel: +86-431-85168614
| | - Lirong Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , College of Chemistry , Jilin University , Changchun 130012 , P. R. China . ; ; Tel: +86-431-85168614
| | - Yunling Liu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , College of Chemistry , Jilin University , Changchun 130012 , P. R. China . ; ; Tel: +86-431-85168614
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Zhang Y, Yang L, Wang L, Duttwyler S, Xing H. A Microporous Metal‐Organic Framework Supramolecularly Assembled from a Cu
II
Dodecaborate Cluster Complex for Selective Gas Separation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903600] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuanbin Zhang
- Key laboratory of Biomass Chemical Engineering of, Ministry of Education College of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 China
| | - Lifeng Yang
- Key laboratory of Biomass Chemical Engineering of, Ministry of Education College of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 China
| | - Lingyao Wang
- Department of Chemistry Zhejiang University 310027 Hangzhou P. R. China
| | - Simon Duttwyler
- Department of Chemistry Zhejiang University 310027 Hangzhou P. R. China
| | - Huabin Xing
- Key laboratory of Biomass Chemical Engineering of, Ministry of Education College of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 China
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Zhang Y, Yang L, Wang L, Duttwyler S, Xing H. A Microporous Metal-Organic Framework Supramolecularly Assembled from a Cu II Dodecaborate Cluster Complex for Selective Gas Separation. Angew Chem Int Ed Engl 2019; 58:8145-8150. [PMID: 30974040 DOI: 10.1002/anie.201903600] [Citation(s) in RCA: 113] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Indexed: 11/06/2022]
Abstract
A novel 3D metal-organic framework BSF-1 based on the closo-dodecaborate cluster [B12 H12 ]2- was readily prepared at room temperature by supramolecular assembly of CuB12 H12 and 1,2-bis(4-pyridyl)acetylene. The permanent microporous structure was studied by X-ray crystallography, powder X-ray diffraction, IR spectroscopy, thermogravimetric analysis, and gas sorption. The experimental and theoretical study of the gas sorption behavior of BSF-1 for N2 , C2 H2 , C2 H4 , CO2 , C3 H8 , C2 H6 , and CH4 indicated excellent separation selectivities for C3 H8 /CH4 , C2 H6 /CH4 , and C2 H2 /CH4 as well as moderately high separation selectivities for C2 H2 /C2 H4 , C2 H2 /CO2 , and CO2 /CH4 . Moreover, the practical separation performance of C3 H8 /CH4 and C2 H6 /CH4 was confirmed by dynamic breakthrough experiments. The good cyclability and high water/thermal stability render it suitable for real industrial applications.
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Affiliation(s)
- Yuanbin Zhang
- Key laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Lifeng Yang
- Key laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Lingyao Wang
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Simon Duttwyler
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Huabin Xing
- Key laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
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