51
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Yashima E, Ousaka N, Taura D, Shimomura K, Ikai T, Maeda K. Supramolecular Helical Systems: Helical Assemblies of Small Molecules, Foldamers, and Polymers with Chiral Amplification and Their Functions. Chem Rev 2016; 116:13752-13990. [PMID: 27754649 DOI: 10.1021/acs.chemrev.6b00354] [Citation(s) in RCA: 1198] [Impact Index Per Article: 149.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In this review, we describe the recent advances in supramolecular helical assemblies formed from chiral and achiral small molecules, oligomers (foldamers), and helical and nonhelical polymers from the viewpoints of their formations with unique chiral phenomena, such as amplification of chirality during the dynamic helically assembled processes, properties, and specific functionalities, some of which have not been observed in or achieved by biological systems. In addition, a brief historical overview of the helical assemblies of small molecules and remarkable progress in the synthesis of single-stranded and multistranded helical foldamers and polymers, their properties, structures, and functions, mainly since 2009, will also be described.
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Affiliation(s)
- Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Naoki Ousaka
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Daisuke Taura
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Kouhei Shimomura
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Tomoyuki Ikai
- Graduate School of Natural Science and Technology, Kanazawa University , Kakuma-machi, Kanazawa 920-1192, Japan
| | - Katsuhiro Maeda
- Graduate School of Natural Science and Technology, Kanazawa University , Kakuma-machi, Kanazawa 920-1192, Japan
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52
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Huo Y, Zeng H. "Sticky"-Ends-Guided Creation of Functional Hollow Nanopores for Guest Encapsulation and Water Transport. Acc Chem Res 2016; 49:922-30. [PMID: 27074642 DOI: 10.1021/acs.accounts.6b00051] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Commercial uses of water-transporting aquaporins for seawater desalination and wastewater reclamation/reuse are being investigated in both academia and the industry. Presently, structural complexity, stability, scalability, and activity reconstitution of these costly channel proteins still present substantial challenges to scientists and engineers. An attractive strategy is to develop robust synthetic water channels able to mimic the water-transporting function of aquaporins for utility in the making of next generation of water channel-based biomimetic porous membranes for various water purification applications. In sharp contrast to burgeoning development in constructing synthetic ion channels over the past four decades, very limited progress has been made in the area of synthetic water channels. A handful of such examples include the first report by Percec in 2007 (Percec et al. J. Am. Chem. Soc. 2007, 129, 11698-11699), which was followed by Barboiu in 2011 (Barboiu et al. Angew. Chem., Int. Ed. 2011, 50, 11366-11372), Gong and Hou in 2012 (Gong et al. Nat. Commun. 2012, 3, 949; Hou et al. J. Am. Chem. Soc. 2012, 134, 8384-8387), and Zeng in 2014 (Zeng et al. J. Am. Chem. Soc. 2014, 136, 14270-14276). Radically deviating from the fact that the discovery of novel synthetic channel systems with desired transport selectivity is most often empirical and very often serendipitous, we have instead adopted a more rational designer approach whereby molecular building blocks have been carefully designed from scratch to perform their intended built-in functions. Our designer journey started in 2008, two years after I started leading a group at the National University of Singapore. Since then, we have been actively investigating the use of designed water-binding "aquafoldamers" to construct synthetic water channels for the rapid and selective transport of water molecules ideally with the exclusion of all other nonproton molecular species. Toward this goal, we designed and characterized, by an experimental-theoretical synergy, a new class of modular, H-bonded, and crescent-shaped oligopyridine amide foldamers, enclosing a sizable cavity of about 2.8 Å in diameter. Matching well with the diameter of water molecules and decorated by interior-pointing H-bond donors (amide H atoms) and acceptors (pyridine N atoms) for water binding, this sizable cavity experimentally proves to be suitable for water recognition. In particular, helically folded oligomers are found to be capable of binding two water molecules that are vertically aligned in parallel with helical axis. However, the existence of two repulsive groups at the two helical ends prevents the formation of 1D hollow tubular cavity, via self-assembly, for encapsulating 1D water chains. Subsequently, we introduced two electrostatically complementary functional groups that act as "sticky" ends at helical ends. These feeble "sticky" ends faithfully and seamlessly align short cavity-containing helices one-dimensionally to create hollow tubular aquapores. To our delight, these aquapores demonstrate their excellent ability of highly selectively hosting a chain of single file H-bonded water molecules and allow for selective transport of both protons and water molecules with exclusion of metal ions including Na(+) and K(+) ions across the lipid membranes.
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Affiliation(s)
- Yanping Huo
- Faculty
of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
| | - Huaqiang Zeng
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669
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53
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Marine JE, Song S, Liang X, Rudick JG. Synthesis and Self-Assembly of Bundle-Forming α-Helical Peptide-Dendron Hybrids. Biomacromolecules 2016; 17:336-44. [PMID: 26674475 PMCID: PMC4710556 DOI: 10.1021/acs.biomac.5b01452] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Dendronized helix bundle assemblies combine the sequence diversity and folding properties of proteins with the tailored physical properties of dendrimers. Assembly of peptide-dendron hybrids into α-helical bundles encapsulates the helix bundle motif in a dendritic sheath that will allow the functional, protein-like domain to be transplanted to nonbiological environments. A bioorthogonal graft-to synthetic strategy for preparing helix bundle-forming peptide-dendron hybrids is described herein for hybrids 1a, 1b, and 2. Titration experiments monitored by circular dichroism spectroscopy support our self-assembly model for how the peptide-dendron hybrids self-assemble into α-helical bundles with the dendrons on outside of the bundle.
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Affiliation(s)
- Jeannette E. Marine
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Shuang Song
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Xiaoli Liang
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Jonathan G. Rudick
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
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54
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Krieg E, Bastings MMC, Besenius P, Rybtchinski B. Supramolecular Polymers in Aqueous Media. Chem Rev 2016; 116:2414-77. [DOI: 10.1021/acs.chemrev.5b00369] [Citation(s) in RCA: 527] [Impact Index Per Article: 65.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | | | - Pol Besenius
- Institute
of Organic Chemistry, Johannes Gutenberg-Universität Mainz, Mainz 55128, Germany
| | - Boris Rybtchinski
- Department
of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
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55
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Blackholly LR, Shepherd HJ, Hiscock JR. ‘Frustrated’ hydrogen bond mediated amphiphile self-assembly – a solid state study. CrystEngComm 2016. [DOI: 10.1039/c6ce01493c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of hydrogen bond donor acidity and counter cation within a ‘frustrated’ self-assembled, hydrogen bonded system.
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56
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Sutisna B, Polymeropoulos G, Mygiakis E, Musteata V, Peinemann KV, Smilgies DM, Hadjichristidis N, Nunes SP. Artificial membranes with selective nanochannels for protein transport. Polym Chem 2016. [DOI: 10.1039/c6py01401a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Membranes based on poly(styrene-b-4-hydroxystyrene-b-styrene) were prepared with nanochannels for preferential transport of proteins with molecular weight 14.3 kg mol−1 and rejection of neutral polyethylene glycol molecules with molecular size of 10 kg mol−1.
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Affiliation(s)
- B. Sutisna
- King Abdullah University of Science and Technology (KAUST)
- Physical Science and Engineering Division (PSE)
- Thuwal
- Saudi Arabia
| | - G. Polymeropoulos
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center (KCC)
- Physical Science and Engineering Division (PSE)
- Thuwal
- Saudi Arabia
| | - E. Mygiakis
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center (KCC)
- Physical Science and Engineering Division (PSE)
- Thuwal
- Saudi Arabia
| | - V. Musteata
- King Abdullah University of Science and Technology (KAUST)
- Biological and Environmental Science and Engineering Division (BESE)
- Thuwal
- Saudi Arabia
| | - K.-V. Peinemann
- King Abdullah University of Science and Technology (KAUST)
- Advanced Membranes and Porous Materials Center (AMPMC)
- Physical Science and Engineering Division (PSE)
- Thuwal
- Saudi Arabia
| | - D.-M. Smilgies
- Cornell High Energy Synchrotron Source
- Wilson Laboratory
- Cornell University
- Ithaca
- USA
| | - N. Hadjichristidis
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center (KCC)
- Physical Science and Engineering Division (PSE)
- Thuwal
- Saudi Arabia
| | - S. P. Nunes
- King Abdullah University of Science and Technology (KAUST)
- Biological and Environmental Science and Engineering Division (BESE)
- Thuwal
- Saudi Arabia
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57
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Barboiu M. Artificial water channels – incipient innovative developments. Chem Commun (Camb) 2016; 52:5657-65. [DOI: 10.1039/c6cc01724j] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This Feature Article discusses the incipient developments of the first artificial water channels, including only systems that integrate synthetic elements in their water selective translocation unit.
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Affiliation(s)
- Mihail Barboiu
- Institut Européen des Membranes
- Adaptive Supramolecular Nanosystems Group
- Place Eugène Bataillon
- CC 047
- F-34095 Montpellier
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58
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Marine JE, Song S, Liang X, Watson MD, Rudick JG. Bundle-forming α-helical peptide-dendron hybrid. Chem Commun (Camb) 2015; 51:14314-7. [PMID: 26268897 PMCID: PMC4567505 DOI: 10.1039/c5cc05468k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Peptides and dendrons are enticing building blocks from which to construct hybrid macromolecules because each can be prepared as monodisperse and sequence defined materials. Folding and assembly properties designed into the amino acid sequence of a peptide-dendron hybrid manifest in the formation of a dendronized bundle of α-helices.
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Affiliation(s)
- Jeannette E Marine
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, USA.
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59
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Highly permeable artificial water channels that can self-assemble into two-dimensional arrays. Proc Natl Acad Sci U S A 2015. [PMID: 26216964 DOI: 10.1073/pnas.1508575112] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Bioinspired artificial water channels aim to combine the high permeability and selectivity of biological aquaporin (AQP) water channels with chemical stability. Here, we carefully characterized a class of artificial water channels, peptide-appended pillar[5]arenes (PAPs). The average single-channel osmotic water permeability for PAPs is 1.0(± 0.3) × 10(-14) cm(3)/s or 3.5(± 1.0) × 10(8) water molecules per s, which is in the range of AQPs (3.4 ∼ 40.3 × 10(8) water molecules per s) and their current synthetic analogs, carbon nanotubes (CNTs, 9.0 × 10(8) water molecules per s). This permeability is an order of magnitude higher than first-generation artificial water channels (20 to ∼ 10(7) water molecules per s). Furthermore, within lipid bilayers, PAP channels can self-assemble into 2D arrays. Relevant to permeable membrane design, the pore density of PAP channel arrays (∼ 2.6 × 10(5) pores per μm(2)) is two orders of magnitude higher than that of CNT membranes (0.1 ∼ 2.5 × 10(3) pores per μm(2)). PAP channels thus combine the advantages of biological channels and CNTs and improve upon them through their relatively simple synthesis, chemical stability, and propensity to form arrays.
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60
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Park S, Lee M, Shin S. A Molecular Dynamics Study on Controlling the Self-Assembly of β-Sheet Peptides with Designer Nanorings. Chem Asian J 2015; 10:1684-9. [DOI: 10.1002/asia.201500438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Indexed: 02/06/2023]
Affiliation(s)
- SeongByeong Park
- Department of Chemistry; Seoul National University; Seoul 151-747 Korea
| | - Myungsoo Lee
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
| | - Seokmin Shin
- Department of Chemistry; Seoul National University; Seoul 151-747 Korea
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61
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Li Q, Han K, Li J, Jia X, Li C. Synthesis of dendrimer-functionalized pillar[5]arenes and their self-assembly to dimeric and trimeric complexes. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.078] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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62
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Yamada S, Sako N, Yamada K, Deguchi K, Shimizu T. Porous organic hydrate crystals: structure and dynamic behaviour of water clusters. CrystEngComm 2015. [DOI: 10.1039/c4ce02517b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Infinite water clusters with a T5(2) motif were observed in porous crystals of 4-nitrostyrylpyridine hydrochloride, the behavior of which was revealed by solid-state 17O NMR spectroscopic analyses.
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Affiliation(s)
- Shinji Yamada
- Department of Chemistry
- Faculty of Science
- Ochanomizu University
- Bunkyo-ku, Japan
| | - Nodoka Sako
- Department of Chemistry
- Faculty of Science
- Ochanomizu University
- Bunkyo-ku, Japan
| | - Kazuhiko Yamada
- Research and Education Faculty
- in charge of Science Research Center
- Kochi University
- Oko Campus
- Nankoku City, Japan
| | - Kenzo Deguchi
- National Institute for Materials Science
- Tsukuba, Japan
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63
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Green E, Fullwood E, Selden J, Zharov I. Functional membranes via nanoparticle self-assembly. Chem Commun (Camb) 2015; 51:7770-80. [DOI: 10.1039/c5cc01388g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Nanoporous and ion conductive materials can be prepared by the self-assembly of nanoparticles, providing membranes with size and charge selectivity suitable for separation and possessing proton or lithium transport properties suitable for fuel cells and batteries.
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Affiliation(s)
- Erica Green
- Department of Chemistry
- University of Utah
- Salt Lake City
- USA
| | - Emily Fullwood
- Department of Chemistry
- University of Utah
- Salt Lake City
- USA
| | | | - Ilya Zharov
- Department of Chemistry
- University of Utah
- Salt Lake City
- USA
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64
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Ma W, Wang C, Li J, Zhang K, Lu YJ, Huo Y, Zeng H. The Dynamics, energetics and selectivity of water chain-containing aquapores created by the self-assembly of aquafoldamer molecules. Org Biomol Chem 2015; 13:10613-9. [DOI: 10.1039/c5ob01732g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Self-assembled hollow tubular aquapores were found to be stable, very dynamic yet highly selective toward recognition of water molecules.
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Affiliation(s)
- Wenliang Ma
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
| | - Chunquan Wang
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
| | - Juntong Li
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
| | - Kun Zhang
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
- School of Chemical and Environmental Engineering
| | - Yu-Jing Lu
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
| | - Yanping Huo
- Faculty of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangdong
- China
| | - Huaqiang Zeng
- Institute of Bioengineering and Nanotechnology
- The Nanos
- Singapore 138669
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65
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Sun HJ, Zhang S, Percec V. From structure to function via complex supramolecular dendrimer systems. Chem Soc Rev 2015; 44:3900-23. [DOI: 10.1039/c4cs00249k] [Citation(s) in RCA: 222] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Self-assembly of quasi-equivalent amphiphilic dendrons into secondary and tertiary structures and their self-organization into periodic arrays.
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Affiliation(s)
- Hao-Jan Sun
- Roy & Diana Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Shaodong Zhang
- Roy & Diana Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Virgil Percec
- Roy & Diana Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
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66
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Wang Y, Huang Z, Kim Y, He Y, Lee M. Guest-Driven Inflation of Self-Assembled Nanofibers through Hollow Channel Formation. J Am Chem Soc 2014; 136:16152-5. [DOI: 10.1021/ja510182x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yanqiu Wang
- State
Key Lab for Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Zhegang Huang
- Department
of Chemistry, Harbin Institute of Technology, Harbin150001, China
| | - Yongju Kim
- State
Key Lab for Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Ying He
- State
Key Lab for Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Myongsoo Lee
- State
Key Lab for Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
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67
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Zhao H, Sheng S, Hong Y, Zeng H. Proton Gradient-Induced Water Transport Mediated by Water Wires Inside Narrow Aquapores of Aquafoldamer Molecules. J Am Chem Soc 2014; 136:14270-6. [DOI: 10.1021/ja5077537] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Huaiqing Zhao
- Department
of Chemistry, 3 Science
Drive 3, National University of Singapore, Singapore 117543
| | - Shen Sheng
- Department
of Chemistry, 3 Science
Drive 3, National University of Singapore, Singapore 117543
| | - Yunhan Hong
- Department
of Biological Science, 14 Science Drive 4, National University of Singapore, Singapore 117543
| | - Huaqiang Zeng
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669
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68
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An artificial primitive mimic of the Gramicidin-A channel. Nat Commun 2014; 5:4142. [PMID: 24967600 DOI: 10.1038/ncomms5142] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 05/15/2014] [Indexed: 11/08/2022] Open
Abstract
Gramicidin A (gA) is the simplest known natural channel, and important progress in improving conduction activity has previously been obtained with modified natural gAs. However, simple artificial systems mimicking the gA functions are unknown. Here we show that gA can be mimicked using a simple synthetic triazole or 'T-channel' forming compound (TCT), having similar constitutional functions as the natural gAs. As in gA channels, the carbonyl moieties of the TCT, which point toward the T-channel core and surround the transport direction, are solvated by water. The net-dipolar alignment of water molecules along the chiral pore surfaces influences the conduction of protons/ions, envisioned to diffuse along dipolar hydrophilic pathways. Theoretical simulations and experimental assays reveal that the conduction through the T-channel, similar to that in gA, presents proton/water conduction, cation/anion selectivity and large open channel-conductance states. T-channels--associating supramolecular chirality with dipolar water alignment--represent an artificial primitive mimic of gA.
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69
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70
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Zhang S, Sun HJ, Hughes AD, Draghici B, Lejnieks J, Leowanawat P, Bertin A, Otero De Leon L, Kulikov OV, Chen Y, Pochan DJ, Heiney PA, Percec V. "Single-single" amphiphilic janus dendrimers self-assemble into uniform dendrimersomes with predictable size. ACS NANO 2014; 8:1554-1565. [PMID: 24397243 DOI: 10.1021/nn405790x] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An accelerated modular synthesis of six libraries containing 29 amphiphilic Janus dendrimers, employed to discover and predict functions via primary structures, is reported. These dendrimers were constructed from a single hydrophobic and a single hydrophilic dendron, interconnected with l-Ala to form two constitutional isomeric libraries, with Gly to produce one library, and with l-propanediol ester to generate two additional constitutional isomeric libraries. They are denoted "single-single" amphiphilic Janus dendrimers. Assemblies obtained by injection of their ethanol solution into water were analyzed by dynamic light scattering and cryogenic transmission electron microscopy. A diversity of complex structures including soft and hard dendrimersomes, cubosomes, solid lamellae, and rod-like micelles were obtained in water. It was discovered that the "single-single" amphiphilic Janus dendrimers containing three triethylene glycol groups in the hydrophilic dendron favored the formation of dendrimersomes. Assemblies in bulk analyzed by differential scanning calorimetry and powder X-ray diffraction revealed that the amphiphilic Janus dendrimers with melting point or glass transition below room temperature self-assemble into soft dendrimersomes in water, while those with higher temperature transitions produce hard assemblies. In the range of concentrations where their size distribution is narrow, the diameter of the dendrimersomes is predictable by the d-spacing of their assemblies in bulk. These results suggested the synthesis of Library 6 containing two simpler constitutional isomeric benzyl ester based amphiphilic Janus dendrimers that self-assemble in water into soft dendrimersomes and multidendrimersome dendrimersomes with predictable dimensions.
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Affiliation(s)
- Shaodong Zhang
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104-6323, United States
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71
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Abstract
Supramolecular polymers from dendritic motifs combine the dynamic nature of supramolecular construction and inherent features from covalent dendronized polymers.
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Affiliation(s)
- Jiatao Yan
- Laboratory of Polymer Chemistry
- Department of Polymer Materials
- College of Materials Science and Engineering
- Shanghai University
- Shanghai 200444, China
| | - Wen Li
- Laboratory of Polymer Chemistry
- Department of Polymer Materials
- College of Materials Science and Engineering
- Shanghai University
- Shanghai 200444, China
| | - Afang Zhang
- Laboratory of Polymer Chemistry
- Department of Polymer Materials
- College of Materials Science and Engineering
- Shanghai University
- Shanghai 200444, China
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72
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Li X, Yang K, Su J, Guo H. Water transport through a transmembrane channel formed by arylene ethynylene macrocycles. RSC Adv 2014. [DOI: 10.1039/c3ra43545h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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73
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Barboiu M, Gilles A. From natural to bioassisted and biomimetic artificial water channel systems. Acc Chem Res 2013; 46:2814-23. [PMID: 23566356 DOI: 10.1021/ar400025e] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Within biological systems, natural channels and pores transport metabolites across the cell membranes. Researchers have explored artificial ion-channel architectures as potential mimics of natural ionic conduction. All these synthetic systems have produced an impressive collection of alternative artificial ion-channels. Amazingly, researchers have made far less progress in the area of synthetic water channels. The development of synthetic biomimetic water channels and pores could contribute to a better understanding of the natural function of protein channels and could offer new strategies to generate highly selective, advanced water purification systems. Despite the imaginative work by synthetic chemists to produce sophisticated architectures that confine water clusters, most synthetic water channels have used natural proteins channels as the selectivity components, embedded in the diverse arrays of bioassisted artificial systems. These systems combine natural proteins that present high water conductance states under natural conditions with artificial lipidic or polymeric matrixes. Experimental results have demonstrated that natural biomolecules can be used as bioassisted building blocks for the construction of highly selective water transport through artificial membranes. A next step to further the potential of these systems was the design and construction of simpler compounds that maintain the high conduction activity obtained with natural compounds leading to fully synthetic artificial biomimetic systems. Such studies aim to use constitutional selective artificial superstructures for water/proton transport to select functions similar to the natural structures. Moving to simpler water channel systems offers a chance to better understand mechanistic and structural behaviors and to uncover novel interactive water-channels that might parallel those in biomolecular systems. This Account discusses the incipient development of the first artificial water channels systems. We include only systems that integrate synthetic elements in their water selective translocation unit. Therefore, we exclude peptide channels because their sequences derive from the proteins in natural channels. We review many of the natural systems involved in water and related proton transport processes. We describe how these systems can fit within our primary goal of maintaining natural function within bioassisted artificial systems. In the last part of the Account, we present several inspiring breakthroughs from the last decade in the field of biomimetic artificial water channels. Researchers have synthesized and tested hydrophobic, hydrophilic and hybrid nanotubular systems. All these examples demonstrate how the novel interactive water-channels can parallel biomolecular systems. At the same time these simpler artificial water channels offer a means of understanding the molecular-scale hydrodynamics of water for many biological scenarios.
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Affiliation(s)
- Mihail Barboiu
- Adaptive Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM-UMII-UMR CNRS 5635, Place Eugene Bataillon CC047, 34095 Montpellier, France
| | - Arnaud Gilles
- Adaptive Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM-UMII-UMR CNRS 5635, Place Eugene Bataillon CC047, 34095 Montpellier, France
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Gong B, Shao Z. Self-assembling organic nanotubes with precisely defined, sub-nanometer pores: formation and mass transport characteristics. Acc Chem Res 2013; 46:2856-66. [PMID: 23597055 DOI: 10.1021/ar400030e] [Citation(s) in RCA: 160] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The transport of molecules and ions across nanometer-scaled pores, created by natural or artificial molecules, is a phenomenon of both fundamental and practical significance. Biological channels are the most remarkable examples of mass transport across membranes and demonstrate nearly exclusive selectivity and high efficiency with a diverse collection of molecules. These channels are critical for many basic biological functions, such as membrane potential, signal transduction, and osmotic homeostasis. If such highly specific and efficient mass transport or separation could be achieved with artificial nanostructures under controlled conditions, they could create revolutionary technologies in a variety of areas. For this reason, investigators from diverse disciplines have vigorously studied small nondeformable nanopores. The most exciting studies have focused on carbon nanotubes (CNTs), which have exhibited fast mass transport and high ion selectivity despite their very simple structure. However, the limitations of CNTs and the dearth of other small (≤2 nm) nanopores have severely hampered the systematic investigation of nanopore-mediated mass transport, which will be essential for designing artificial nanopores with desired functions en masse. Researchers can overcome the difficulties associated with CNT and other artificial pores by stacking macrocyclic building blocks with persistent shapes to construct tunable, self-assembling organic pores. This effort started when we discovered a highly efficient, one-pot macrocyclization process to efficiently prepare several classes of macrocycles with rigid backbones containing nondeformable cavities. Such macrocycles, if stacked atop one another, should lead to nanotubular assemblies with defined inner pores determined by their constituent macrocycles. One class of macrocycles with aromatic oligoamide backbones had a very high propensity for directional assembly, forming nanotubular structures containing nanometer and sub-nanometer hydrophilic pores. These self-assembling hydrophilic pores can form ion channels in lipid membranes with very large ion conductances. To control the assembly, we have further introduced multiple hydrogen-bonding side chains to enforce the stacking of rigid macrocycles into self-assembling nanotubes. This strategy has produced a self-assembling, sub-nanometer hydrophobic pore that not only acted as a transmembrane channel with surprisingly high ion selectivity, but also mediated a significant transmembrane water flux. The stacking of rigid macrocycles that can be chemically modified in either the lumen or the exterior surface can produce self-assembling organic nanotubes with inner pores of defined sizes. The combination of our approach with the availability and synthetic tunability of various rigid macrocycles should produce a variety of organic nanopores. Such structures would allow researchers to systematically explore mass transport in the sub-nanometer regime. Further advances should lead to novel applications such as biosensing, materials separation, and molecular purifications.
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Affiliation(s)
- Bing Gong
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Zhifeng Shao
- Key Laboratory of Systems Biomedicine, State Key Laboratory for Oncogenes & Related Genes and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Kim Y, Li W, Shin S, Lee M. Development of toroidal nanostructures by self-assembly: rational designs and applications. Acc Chem Res 2013; 46:2888-97. [PMID: 24053785 DOI: 10.1021/ar400027c] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Toroidal nanostructures are symmetrical ring-shaped structures with a central internal pore. Interestingly, in nature, many transmembrane proteins such as β-barrels and α-helical bundles have toroidal shapes. Because of this similarity, toroidal nanostructures can provide a template for the development of transmembrane channels. However, because of the lack of guiding principles for the construction of toroids, researchers have not widely studied the self-assembly of toroidal nanostructures as compared with the work on other supramolecular architectures. In this Account, we describe our recent efforts to construct toroidal nanostructures through the self-assembly of rationally designed building blocks. In one strategy for building these structures, we induce interfacial curvatures within the building blocks. When we laterally graft a bulky hydrophilic segment onto a p-oligophenyl rod or β-sheet peptides, the backbones of the self-assembled structures can bend in response to the steric effect of these large side groups, driving the p-oligophenyl rod or β-sheet peptides to form nanosized toriods. In another strategy, we can build toroids from bent-shaped building blocks by stacking the macrocycles. Aromatic segments with an internal angle of 120° can associate with each other in aqueous solution to form a hexameric macrocycle. Then these macrocycles can stack on top of each other via hydrophobic and π-π interactions and form highly uniform toroidal nanostructures. We provide many examples that illustrate these guiding principles for constructing toroidal nanostructures in aqueous solution. Efforts to create toroidal nanostructures through the self-assembly of elaborately designed molecular modules provide a fundamental approach toward the development of artificial transmembrane channels. Among the various toroids that we developed, a few nanostructures can insert into lipid membranes and allow limited transport in vesicles.
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Affiliation(s)
- Yongju Kim
- State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Wen Li
- State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Suyong Shin
- Department of Chemistry, Seoul National University, Seoul 151-747, Korea
| | - Myongsoo Lee
- State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
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76
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Legrand YM, Barboiu M. Self-Assembled Supramolecular Channels: Toward Biomimetic Materials for Directional Translocation. CHEM REC 2013; 13:524-38. [DOI: 10.1002/tcr.201300011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Indexed: 01/24/2023]
Affiliation(s)
- Yves-Marie Legrand
- Adaptive Supramolecular Nanosystems Group; Institut Europeen des Membranes; ENSCM-UMII-UMR CNRS 5635; Place Eugene Bataillon CC047 34095 Montpellier France
| | - Mihail Barboiu
- Adaptive Supramolecular Nanosystems Group; Institut Europeen des Membranes; ENSCM-UMII-UMR CNRS 5635; Place Eugene Bataillon CC047 34095 Montpellier France
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77
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Busseron E, Ruff Y, Moulin E, Giuseppone N. Supramolecular self-assemblies as functional nanomaterials. NANOSCALE 2013; 5:7098-140. [PMID: 23832165 DOI: 10.1039/c3nr02176a] [Citation(s) in RCA: 496] [Impact Index Per Article: 45.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In this review, we survey the diversity of structures and functions which are encountered in advanced self-assembled nanomaterials. We highlight their flourishing implementations in three active domains of applications: biomedical sciences, information technologies, and environmental sciences. Our main objective is to provide the reader with a concise and straightforward entry to this broad field by selecting the most recent and important research articles, supported by some more comprehensive reviews to introduce each topic. Overall, this compilation illustrates how, based on the rules of supramolecular chemistry, the bottom-up approach to design functional objects at the nanoscale is currently producing highly sophisticated materials oriented towards a growing number of applications with high societal impact.
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Affiliation(s)
- Eric Busseron
- SAMS Research Group, University of Strasbourg, Institut Charles Sadron, CNRS, 23 rue du Loess, BP 84087, 67034 Strasbourg Cedex 2, France
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Roche C, Percec V. Complex Adaptable Systems based on Self‐Assembling Dendrimers and Dendrons: Toward Dynamic Materials. Isr J Chem 2013. [DOI: 10.1002/ijch.201200099] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Cécile Roche
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104‐6323 (USA) phone: +1 215‐573‐5527 fax: +1 215‐573‐7888
| | - Virgil Percec
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104‐6323 (USA) phone: +1 215‐573‐5527 fax: +1 215‐573‐7888
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79
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Mayoral MJ, Rest C, Stepanenko V, Schellheimer J, Albuquerque RQ, Fernández G. Cooperative Supramolecular Polymerization Driven by Metallophilic Pd···Pd Interactions. J Am Chem Soc 2013; 135:2148-51. [DOI: 10.1021/ja312628g] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- María José Mayoral
- Institut für Organische
Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Würzburg, Germany
| | - Christina Rest
- Institut für Organische
Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Würzburg, Germany
| | - Vladimir Stepanenko
- Institut für Organische
Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Würzburg, Germany
| | - Jennifer Schellheimer
- Institut für Organische
Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Würzburg, Germany
| | | | - Gustavo Fernández
- Institut für Organische
Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Würzburg, Germany
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80
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van Rijn P, Tutus M, Kathrein C, Zhu L, Wessling M, Schwaneberg U, Böker A. Challenges and advances in the field of self-assembled membranes. Chem Soc Rev 2013; 42:6578-92. [DOI: 10.1039/c3cs60125k] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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81
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From Synthetic Macromolecules to Biological-Like Complex Systems. HIERARCHICAL MACROMOLECULAR STRUCTURES: 60 YEARS AFTER THE STAUDINGER NOBEL PRIZE I 2013. [DOI: 10.1007/12_2013_273] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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82
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83
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84
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Kim HJ, Liu F, Ryu JH, Kang SK, Zeng X, Ungar G, Lee JK, Zin WC, Lee M. Self-Organization of Bent Rod Molecules into Hexagonally Ordered Vesicular Columns. J Am Chem Soc 2012; 134:13871-80. [DOI: 10.1021/ja3060904] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - Feng Liu
- Department of Materials Science
and Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom
| | | | | | - Xiangbing Zeng
- Department of Materials Science
and Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom
| | - Goran Ungar
- Department of Materials Science
and Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom
| | - Jeong-Kyu Lee
- Department of Materials Science
and Engineering, Polymer Research Institute, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Wang-Cheol Zin
- Department of Materials Science
and Engineering, Polymer Research Institute, Pohang University of Science and Technology, Pohang 790-784, Korea
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85
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Zhou X, Liu G, Yamato K, Shen Y, Cheng R, Wei X, Bai W, Gao Y, Li H, Liu Y, Liu F, Czajkowsky DM, Wang J, Dabney MJ, Cai Z, Hu J, Bright FV, He L, Zeng XC, Shao Z, Gong B. Self-assembling subnanometer pores with unusual mass-transport properties. Nat Commun 2012; 3:949. [DOI: 10.1038/ncomms1949] [Citation(s) in RCA: 149] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Accepted: 06/11/2012] [Indexed: 11/09/2022] Open
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86
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Lai LL, Hsu SJ, Hsu HC, Wang SW, Cheng KL, Chen CJ, Wang TH, Hsu HF. Formation of Columnar Liquid Crystals on the Basis of Unconventional Triazine-Based Dendrimers by theC3-Symmetric Approach. Chemistry 2012; 18:6542-7. [DOI: 10.1002/chem.201103423] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Indexed: 11/07/2022]
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87
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Rosen BM, Roche C, Percec V. Self-assembly of dendritic dipeptides as a model of chiral selection in primitive biological systems. Top Curr Chem (Cham) 2012; 333:213-53. [PMID: 23306867 DOI: 10.1007/128_2012_398] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Biological macromolecules are homochiral, composed of sequences of stereocenters possessing the same repeated absolute configuration. This chapter addresses the mechanism of homochiral selection in polypeptides. In particular, the relationship between the stereochemistry (L or D) of structurally distinct α-amino acids is explored. Through functionalization of Tyr-Xaa dipeptides with self-assembling dendrons, the effect of stereochemical sequence of the dipeptide on the thermodynamics of self-assembly and the resulting structural features can be quantified. The dendritic dipeptide approach effectively isolates the stereochemical information of the shortest sequence of stereochemical information possible in polypeptide, while simultaneously allowing for dendron driven tertiary and quaternary structure formation and subsequent transfer of chiral information from the dipeptide to the dendritic sheath. This approach elucidates a mechanism of selecting a homochiral relationship between dissimilar but neighboring α-amino acids through thermodynamic preference for homochirality in solution-phase and bulk supramolecular helical polymerization.
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Affiliation(s)
- Brad M Rosen
- DuPont Central Research & Development, Experimental Station, Wilmington, DE, 19880, USA
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88
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Afonso R, Mendes A, Gales L. Peptide-based solids: porosity and zeolitic behavior. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm13568f] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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89
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Du P, Kong J, Wang G, Zhao X, Li G, Jiang X, Li Z. Hydrogen Bonded Supramolecular Polymers in Both Apolar and Aqueous Media: Self-Assembly and Reversible Conversion of Vesicles and Gels. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201100254] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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90
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Kishikawa K, Isaka M, Takahashi M, Saito K, Kohmoto S. Self-assembly of Compact Molecules Possessing Two Carboxy and One Amide Groups into Tubular Nanostructures in Liquid Crystal Phases. CHEM LETT 2011. [DOI: 10.1246/cl.2011.1278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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91
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Rybtchinski B. Adaptive supramolecular nanomaterials based on strong noncovalent interactions. ACS NANO 2011; 5:6791-818. [PMID: 21870803 DOI: 10.1021/nn2025397] [Citation(s) in RCA: 345] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Noncovalent systems are adaptive and allow facile processing and recycling. Can they be at the same time robust? How can one rationally design such systems? Can they compete with high-performance covalent materials? The recent literature reveals that noncovalent systems can be robust yet adaptive, self-healing, and recyclable, featuring complex nanoscale structures and unique functions. We review such systems, focusing on the rational design of strong noncovalent interactions, kinetically controlled pathway-dependent processes, complexity, and function. The overview of the recent examples points at the emergent field of noncovalent nanomaterials that can represent a versatile, multifunctional, and environmentally friendly alternative to conventional covalent systems.
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Affiliation(s)
- Boris Rybtchinski
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel.
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92
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Hourani R, Zhang C, van der Weegen R, Ruiz L, Li C, Keten S, Helms BA, Xu T. Processable Cyclic Peptide Nanotubes with Tunable Interiors. J Am Chem Soc 2011; 133:15296-9. [DOI: 10.1021/ja2063082] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rami Hourani
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720-1760, United States
| | - Chen Zhang
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720-1760, United States
| | - Rob van der Weegen
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Luis Ruiz
- Department of Civil & Environmental Engineering and Mechanical Engineering, Northwestern University, Evanston, Illinois 60208-3111, United States
| | - Changyi Li
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720-1760, United States
| | - Sinan Keten
- Department of Civil & Environmental Engineering and Mechanical Engineering, Northwestern University, Evanston, Illinois 60208-3111, United States
| | - Brett A. Helms
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Ting Xu
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720-1760, United States
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93
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Le Duc Y, Michau M, Gilles A, Gence V, Legrand YM, van der Lee A, Tingry S, Barboiu M. Imidazole-Quartet Water and Proton Dipolar Channels. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103312] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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94
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Le Duc Y, Michau M, Gilles A, Gence V, Legrand YM, van der Lee A, Tingry S, Barboiu M. Imidazole-Quartet Water and Proton Dipolar Channels. Angew Chem Int Ed Engl 2011; 50:11366-72. [DOI: 10.1002/anie.201103312] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2011] [Indexed: 01/11/2023]
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95
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Ren C, Maurizot V, Zhao H, Shen J, Zhou F, Ong WQ, Du Z, Zhang K, Su H, Zeng H. Five-Fold-Symmetric Macrocyclic Aromatic Pentamers: High-Affinity Cation Recognition, Ion-Pair-Induced Columnar Stacking, and Nanofibrillation. J Am Chem Soc 2011; 133:13930-3. [DOI: 10.1021/ja206457b] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Changliang Ren
- Department of Chemistry and NUS MedChem Program of the Office of Life Sciences, 3 Science Drive 3, National University of Singapore, Singapore 117543
| | - Victor Maurizot
- CNAB—UMR5084, Université de Bordeaux, UMR CNRS 5248, Institute Européen de Chimie et Biologie, 2 rue Robert Escarpit, 33607 Pessac Cedex, France
| | - Huaiqing Zhao
- Department of Chemistry and NUS MedChem Program of the Office of Life Sciences, 3 Science Drive 3, National University of Singapore, Singapore 117543
| | - Jie Shen
- Department of Chemistry and NUS MedChem Program of the Office of Life Sciences, 3 Science Drive 3, National University of Singapore, Singapore 117543
| | - Feng Zhou
- Division of Materials Science, 50 Nanyang Avenue, Nanyang Technological University, Singapore 639798
| | - Wei Qiang Ong
- Department of Chemistry and NUS MedChem Program of the Office of Life Sciences, 3 Science Drive 3, National University of Singapore, Singapore 117543
| | - Zhiyun Du
- Faculty of Light Industry and Chemical Engineering, Guang Dong University of Technology, Guang Dong 510006, China
| | - Kun Zhang
- Faculty of Light Industry and Chemical Engineering, Guang Dong University of Technology, Guang Dong 510006, China
| | - Haibin Su
- Division of Materials Science, 50 Nanyang Avenue, Nanyang Technological University, Singapore 639798
| | - Huaqiang Zeng
- Department of Chemistry and NUS MedChem Program of the Office of Life Sciences, 3 Science Drive 3, National University of Singapore, Singapore 117543
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96
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Park C, Lee J, Kim C. Functional supramolecular assemblies derived from dendritic building blocks. Chem Commun (Camb) 2011; 47:12042-56. [PMID: 21785775 DOI: 10.1039/c1cc11531f] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Control of the structure and function of self-assembled materials has been a significant issue in many areas of nanoscience. Among many different types of building blocks, dendritic ones have shown interesting self-assembly behaviour and functional performances due to their unique shape and multiple functionalities. Dendritic building blocks exhibit unique self-assembly behaviour in diverse environments such as aqueous and organic solutions, solid-liquid interfaces, and thermotropic solid conditions. Tuning the balance between hydrophilic and hydrophobic parts, as well as the external conditions for self-assembly, provides unique opportunities for control of supramolecular architectures. Furthermore, the introduction of suitable functional moieties into dendrons enables us to control self-assembly characteristics, allowing nanostructures to exhibit smart performances for electronic or biological applications. The self-assembly characteristics of amphiphilic dendrons under various conditions were investigated to elucidate how dendrons can assemble into nanoscopic structures and how these nanoassemblies exhibit unique properties. Well-defined nanostructures derived from self-assembly of dendrons provide an efficient approach for exhibition of unique functions at the nanoscale. This feature article describes the unique self-assembly characteristics of various types of dendritic building blocks and their potential applications as advanced materials.
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Affiliation(s)
- Chiyoung Park
- Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Korea
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97
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Rosen BM, Peterca M, Morimitsu K, Dulcey AE, Leowanawat P, Resmerita AM, Imam MR, Percec V. Programming the Supramolecular Helical Polymerization of Dendritic Dipeptides via the Stereochemical Information of the Dipeptide. J Am Chem Soc 2011; 133:5135-51. [DOI: 10.1021/ja200280h] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Brad M. Rosen
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Mihai Peterca
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396, United States
| | - Kentaro Morimitsu
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Andrés E. Dulcey
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Pawaret Leowanawat
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Ana-Maria Resmerita
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Mohammad R. Imam
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Virgil Percec
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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98
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Matile S, Vargas Jentzsch A, Montenegro J, Fin A. Recent synthetic transport systems. Chem Soc Rev 2011; 40:2453-74. [PMID: 21390363 DOI: 10.1039/c0cs00209g] [Citation(s) in RCA: 292] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
This critical review covers progress with synthetic transport systems, particularly ion channels and pores, between January 2006 and December 2009 in a comprehensive manner. This is the third part of a series launched in the year 2000, covering a rich collection of structural and functional motifs that should appeal to a broad audience of non-specialists, including to organic, biological, supramolecular and polymer chemists. Impressive breakthroughs have been achieved over the past four years in part because of a fruitful expansion toward new types of interactions, including metal-organic, π-π, aromatic electron donor-acceptor, anion-π or anion-macrodipole interactions as well as dynamic covalent bonds (169 references).
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Affiliation(s)
- Stefan Matile
- Department of Organic Chemistry, University of Geneva, Geneva, Switzerland.
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Thyagarajan S, Leiding T, Arsköld SP, Cheprakov AV, Vinogradov SA. Highly non-planar dendritic porphyrin for pH sensing: observation of porphyrin monocation. Inorg Chem 2011; 49:9909-20. [PMID: 20882973 DOI: 10.1021/ic100968p] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal-free porphyrin-dendrimers provide a convenient platform for the construction of membrane-impermeable ratiometric probes for pH measurements in compartmentalized biological systems. In all previously reported molecules, electrostatic stabilization (shielding) of the core porphyrin by peripheral negative charges (carboxylates) was required to shift the intrinsically low porphyrin protonation pK(a)'s into the physiological pH range (pH 6-8). However, binding of metal cations (e.g., K(+), Na(+), Ca(2+), Mg(2+)) by the carboxylate groups on the dendrimer could affect the protonation behavior of such probes in biological environments. Here we present a dendritic pH nanoprobe based on a highly non-planar tetraaryltetracyclohexenoporphyrin (Ar(4)TCHP), whose intrinsic protonation pK(a)'s are significantly higher than those of regular tetraarylporphyrins, thereby eliminating the need for electrostatic core shielding. The porphyrin was modified with eight Newkome-type dendrons and PEGylated at the periphery, rendering a neutral water-soluble probe (TCHpH), suitable for measurements in the physiological pH range. The protonation of TCHpH could be followed by absorption (e.g., ε(Soret)(dication)∼270,000 M(-1) cm(-1)) or by fluorescence. Unlike most tetraarylporphyrins, TCHpH is protonated in two distinct steps (pK(a)'s 7.8 and 6.0). In the region between the pK(a)'s, an intermediate species with a well-defined spectroscopic signature, presumably a TCHpH monocation, could be observed in the mixture. The performance of TCHpH was evaluated by pH gradient measurements in large unilamellar vesicles. The probe was retained inside the vesicles and did not pass through and/or interact with vesicle membranes, proving useful for quantification of proton transport across phospholipid bilayers. To interpret the protonation behavior of TCHpH we developed a model relating structural changes on the porphyrin macrocycle upon protonation to its basicity. The model was validated by density functional theory (DFT) calculations performed on a planar and non-planar porphyrin, making it possible to rationalize higher protonation pK(a)'s of non-planar porphyrins as well as the easier observation of their monocations.
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Affiliation(s)
- Sujatha Thyagarajan
- Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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Park IS, Yoon YR, Jung M, Kim K, Park S, Shin S, Lim YB, Lee M. Designer Nanorings with Functional Cavities from Self-Assembling β-Sheet Peptides. Chem Asian J 2010; 6:452-8. [DOI: 10.1002/asia.201000428] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2010] [Indexed: 11/12/2022]
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