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Talukdar D, Gole B. Foldamer-Based Mechanoresponsive Materials: Molecular Nanoarchitectonics to Advanced Functions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:18791-18805. [PMID: 39051976 DOI: 10.1021/acs.langmuir.4c01252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
Artificial molecules that respond to external stimuli such as light, heat, chemical signals, and mechanical force have garnered significant interest due to their tunable functions, variable optical properties, and mechanical responses. Particularly, mechanoresponsive materials featuring molecules that respond to mechanical stress or show force-induced optical changes have been intriguing due to their extraordinary functions. Despite the promising potential of many such materials reported in the past, practical applications have remained limited, primarily because their functions often depend on irreversible covalent bond rupture. Foldamers, oligomers that fold into well-defined secondary structures, offer an alternative class of mechanoactive motifs. These molecules can reversibly sustain mechanical stress and efficiently dissipate energy by transitioning between folded and unfolded states. This review focuses on the emerging properties of foldamer-based mechanoresponsive materials. We begin by highlighting the mechanical responses of foldamers in their molecular form, which have been primarily investigated using single-molecule force spectroscopy and other analytical methods. Following this, we provide a detailed survey of the current trends in foldamer-appended polymers, emphasizing their emerging mechanical and mechanochromic properties. Subsequently, we present an overview of the state-of-the-art advancements in foldamer-appended polymers, showcasing significant reports in this field. This review covers some of the most recent advances in this direction and draws a perspective for further development.
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Affiliation(s)
- Dhrubajyoti Talukdar
- Biomimetic Supramolecular Chemistry Laboratory, Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Greater Noida, Uttar Pradesh 201314, India
| | - Bappaditya Gole
- Biomimetic Supramolecular Chemistry Laboratory, Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Greater Noida, Uttar Pradesh 201314, India
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2
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Matsumura K, Kinjo K, Tateno K, Ono K, Tsuchido Y, Kawai H. M/ P Helicity Switching and Chiral Amplification in Double-Helical Monometallofoldamers. J Am Chem Soc 2024; 146:21078-21088. [PMID: 39029122 PMCID: PMC11295176 DOI: 10.1021/jacs.4c06560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 07/02/2024] [Accepted: 07/03/2024] [Indexed: 07/21/2024]
Abstract
Short-stranded double-helical monometallofoldamers capable of M/P-switching were constructed by the complexation of two strands, each with two L-shaped units linked by a 2,2'-bipyridine, with a Zn(II) cation. The helix terminals of the "double-helical form" folded by π-π interactions can unfold in solution to equilibrate with the "open forms" that are favored at higher temperatures. Interestingly, the helical chirality of the monometallofoldamers with chiral side chains induced a single-handed helix sense and controlled M/P-switching depending on achiral solvent stimuli. For instance, the (M)-helicity was favored in nonpolarized solvents (toluene, hexane, Et2O), whereas the (P)-helicity was favored in Lewis basic solvents (acetone, DMSO). Circular dichroism (CD) and rotating-frame overhauser enhancement spectroscopy (ROESY) measurements revealed that the conformational change of the chiral side chains due to interaction of Lewis basic solvents with the double helices induced helicity bias. These novel double-helical monometallofoldamers possessed a stable helical structure and exhibited switchable chiroptical properties (gabs ∼ 10-3-10-2). In addition, the chiral strand exhibited chiral transfer and amplification abilities through the formation of chiral heteroleptic double-helical monometallofoldamers when mixed with an achiral strand.
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Affiliation(s)
- Kotaro Matsumura
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Keigo Kinjo
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Kotaro Tateno
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Kosuke Ono
- School
of Science, Tokyo Institute of Technology, Tokyo 152-8551, Japan
| | - Yoshitaka Tsuchido
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Hidetoshi Kawai
- Department
of Chemistry, Faculty of Science, Tokyo
University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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3
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Fukuda H, Tsurumaki E, Wakamatsu K, Toyota S. Unusually Short H⋅⋅⋅H Contacts in Intramolecularly Cyclized Helically Fused Anthracenes. Chemistry 2024; 30:e202401627. [PMID: 38751350 DOI: 10.1002/chem.202401627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Indexed: 06/27/2024]
Abstract
The intramolecular coupling of dichloro-substituted helically fused anthracenes using the Yamamoto coupling yielded cyclized products with sterically congested molecular structures. The X-ray analysis and DFT calculations showed that the aromatic framework adopted a nonplanar structure with a twisted conformation about the newly formed single bond, which acts as a chiral axis. Interestingly, the X-ray structure obtained through the Hirshfeld atom refinement revealed short interatomic distances between the inner hydrogen atoms (1.648-1.692 Å), much shorter than the sum of their van der Waals radii. Owing to these unusually short contacts, the 1H NMR spectrum exhibited a significant deshielding (12.5 ppm) and a large nuclear Overhauser effect (44 %). Additionally, the IR spectrum displayed a high-frequency shift of the C-H stretching vibration. These observations, along with the noncovalent interaction plot indicative of a characteristic steric environment, strongly support the presence of steric hindrance. Moreover, dynamic NMR measurement of the mesityl-substituted derivative yielded a barrier to helical inversion of 84 kJ mol-1. The optical properties and crystal packing of the cyclized products are also reported.
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Affiliation(s)
- Hiroki Fukuda
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Eiji Tsurumaki
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Kan Wakamatsu
- Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama, 700-0005, Japan
| | - Shinji Toyota
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
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4
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Wayment LJ, Teat SJ, Huang S, Chen H, Zhang W. Dynamic Entwined Topology in Helical Covalent Polymers Dictated by Competing Supramolecular Interactions. Angew Chem Int Ed Engl 2024; 63:e202403599. [PMID: 38444217 DOI: 10.1002/anie.202403599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 03/02/2024] [Accepted: 03/04/2024] [Indexed: 03/07/2024]
Abstract
Naturally occurring polymeric structures often consist of 1D polymer chains intricately folded and entwined through non-covalent bonds, adopting precise topologies crucial for their functionality. The exploration of crystalline 1D polymers through dynamic covalent chemistry (DCvC) and supramolecular interactions represents a novel approach for developing crystalline polymers. This study shows that sub-angstrom differences in the counter-ion size can lead to various helical covalent polymer (HCP) topologies, including a novel metal-coordination HCP (m-HCP) motif. Single-crystal X-ray diffraction (SCXRD) analysis of HCP-Na revealed that double helical pairs are formed by sodium ions coordinating to spiroborate linkages to form rectangular pores. The double helices are interpenetrated by the unreacted diols coordinating sodium ions. The reticulation of the m-HCP structure was demonstrated by the successful synthesis of HCP-K. Finally, ion-exchange studies were conducted to show the interconversion between HCP structures. This research illustrates how seemingly simple modifications, such as changes in counter-ion size, can significantly influence the polymer topology and determine which supramolecular interactions dominate the crystal lattice.
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Affiliation(s)
- Lacey J Wayment
- Department of Chemistry, University of Colorado Boulder, Boulder, CO-80309, USA
| | - Simon J Teat
- Advanced Light Source, Lawrence Berkeley National Laboratory, Department of Chemistry, University of California, Berkeley, Berkeley, CA-94720, USA
| | - Shaofeng Huang
- Department of Chemistry, University of Colorado Boulder, Boulder, CO-80309, USA
| | - Hongxuan Chen
- Department of Chemistry, University of Colorado Boulder, Boulder, CO-80309, USA
| | - Wei Zhang
- Department of Chemistry, University of Colorado Boulder, Boulder, CO-80309, USA
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5
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Kirita K, Matsumoto H, Endo G, Hosokawa S. Total Syntheses of Borolithochromes A, D and G. Angew Chem Int Ed Engl 2024; 63:e202400586. [PMID: 38369567 DOI: 10.1002/anie.202400586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/13/2024] [Accepted: 02/15/2024] [Indexed: 02/20/2024]
Abstract
Total syntheses of borolithochromes A, D and G, red pigments isolated from fossils of Jurassic putative red alga Solenopora jurassica, have been achieved. The benzo[gh]tetraphene skeletons of the borate ligands in these substances were constructed using Diels-Alder reactions of aryl dienes with naphthoquinone, followed by intramolecular Corey-Chaykovsky reactions. Complexation of these ligands with trimethyl borate generated homocomplexes, which upon sequential O-demethylation produced borolithochromes A and G. In the route to borolithochrome D, a heterocomplex was prepared by stepwise complexation of the ligands with 2-(dimethylamino)ethyl dimethyl borate. The strategy devised to accomplish the first total synthesis of borolithochromes A, D and G should be applicable to the preparation of other borolithochromes as well as spiroborates possessing two fused polycyclic aromatic ligands.
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Affiliation(s)
- Kanade Kirita
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Hirotake Matsumoto
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Gaku Endo
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Seijiro Hosokawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan
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6
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Li X, Song Q. "Homoleptic" Tetracoordinate Boron Compounds. Inorg Chem 2024; 63:5295-5314. [PMID: 38488071 DOI: 10.1021/acs.inorgchem.4c00102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
"Homoleptic" tetracoordinate boron compounds, in which the central boron atom links to four identical atoms, are a special and important family of boron compounds. During the past decades, they have been extensively employed in inorganic, organic, macromolecular, and materials chemistry. Many of them exhibit a diverse range of outstanding properties, and therefore, the synthesis and application of those compounds have emerged as a hot research topic in modern boron chemistry. This review summarizes and discusses the "homoleptic" tetracoordinate boron compounds, which are organized according to the kinds of atoms coordinated to the central boron.
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Affiliation(s)
- Xin Li
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering, Huaqiao University, Xiamen, Fujian 361021, China
| | - Qiuling Song
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
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7
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Dhamija A, Chandel D, Rath SP. Modulation of supramolecular chirality by stepwise axial coordination in a nano-size trizinc(ii)porphyrin trimer. Chem Sci 2023; 14:6032-6038. [PMID: 37293642 PMCID: PMC10246700 DOI: 10.1039/d3sc00858d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 05/09/2023] [Indexed: 06/10/2023] Open
Abstract
Herein, we report a chiral guest's triggered spring-like contraction and extension motions coupled with unidirectional twisting in a novel flexible and 'nano-size' achiral trizinc(ii)porphyrin trimer host upon step-wise formation of 1 : 1, 1 : 2, and 1 : 4 host-guest supramolecular complexes based on the stoichiometry of the diamine guests for the first time. During these processes, porphyrin CD responses have been induced, inverted, and amplified, and reduced, respectively, in a single molecular framework due to the change in the interporphyrin interactions and helicity. Also, the sign of the CD couplets is just the opposite between R and S substrates which suggests that the chirality is dictated solely by the stereographic projection of the chiral center. Interestingly, the long-range electronic communications between the three porphyrin rings generate trisignate CD signals that provide further information about molecular structures.
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Affiliation(s)
- Avinash Dhamija
- Department of Chemistry, Indian Institute of Technology Kanpur Kanpur-208016 India
| | - Dolly Chandel
- Department of Chemistry, Indian Institute of Technology Kanpur Kanpur-208016 India
| | - Sankar Prasad Rath
- Department of Chemistry, Indian Institute of Technology Kanpur Kanpur-208016 India
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8
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Koda N, Haketa Y, Yokoyama M, Yasuda N, Maeda H. Anion-Responsive Boron-Spiro-Centered π-Electronic Systems That Form Ion-Pairing Assemblies. Org Lett 2023; 25:1120-1125. [PMID: 36779934 DOI: 10.1021/acs.orglett.3c00073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
A variety of naphthalenediolates were orthogonally introduced to the boron unit of dipyrrolyldiketone boron complexes, exhibiting electronic properties that depended on the substituting positions of the naphthyl moieties. Combining the anion complexes with countercations resulted in the formation of ion-pairing assemblies with supporting stacking interactions of the naphthyl units.
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Affiliation(s)
- Naoya Koda
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan
| | - Yohei Haketa
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan
| | - Miyu Yokoyama
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan
| | - Nobuhiro Yasuda
- Diffraction and Scattering Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan
| | - Hiromitsu Maeda
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan
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9
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Jin Y, Mandal PK, Wu J, Böcher N, Huc I, Otto S. (Re-)Directing Oligomerization of a Single Building Block into Two Specific Dynamic Covalent Foldamers through pH. J Am Chem Soc 2023; 145:2822-2829. [PMID: 36705469 PMCID: PMC9912251 DOI: 10.1021/jacs.2c09325] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Dynamic foldamers are synthetic folded molecules which can change their conformation in response to an external stimulus and are currently at the forefront of foldamer chemistry. However, constitutionally dynamic foldamers, which can change not only their conformation but also their molecular constitution in response to their environment, are without precedent. We now report a size- and shape-switching small dynamic covalent foldamer network which responds to changes in pH. Specifically, acidic conditions direct the oligomerization of a dipeptide-based building block into a 16-subunit macrocycle with well-defined conformation and with high selectivity. At higher pH the same building block yields another cyclic foldamer with a smaller ring size (9mer). The two foldamers readily and repeatedly interconvert upon adjustment of the pH of the solution. We have previously shown that addition of a template can direct oligomerization of the same building block to yet other rings sizes (including a 12mer and a 13mer, accompanied by a minor amount of 14mer). This brings the total number of discrete foldamers that can be accessed from a single building block to five. For a single building block system to exhibit such highly diverse structure space is unique and sets this system of foldamers apart from proteins. Furthermore, the emergence of constitutional dynamicity opens up new avenues to foldamers with adaptive behavior.
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Affiliation(s)
- Yulong Jin
- Beijing
National Laboratory for Molecular Sciences, CAS Key Laboratory of
Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, 100190 Beijing, China,Centre
for Systems Chemistry, Stratingh Institute, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Pradeep K. Mandal
- Department
of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians Universität, 81377 Munich, Germany
| | - Juntian Wu
- Centre
for Systems Chemistry, Stratingh Institute, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Niklas Böcher
- Department
of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians Universität, 81377 Munich, Germany
| | - Ivan Huc
- Department
of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians Universität, 81377 Munich, Germany,
| | - Sijbren Otto
- Centre
for Systems Chemistry, Stratingh Institute, Nijenborgh 4, 9747 AG Groningen, The Netherlands,
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10
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Formation of supramolecular channels by reversible unwinding-rewinding of bis(indole) double helix via ion coordination. Nat Commun 2022; 13:6507. [PMID: 36316309 PMCID: PMC9622825 DOI: 10.1038/s41467-022-34159-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 10/14/2022] [Indexed: 12/03/2022] Open
Abstract
Stimulus-responsive reversible transformation between two structural conformers is an essential process in many biological systems. An example of such a process is the conversion of amyloid-β peptide into β-sheet-rich oligomers, which leads to the accumulation of insoluble amyloid in the brain, in Alzheimer's disease. To reverse this unique structural shift and prevent amyloid accumulation, β-sheet breakers are used. Herein, we report a series of bis(indole)-based biofunctional molecules, which form a stable double helix structure in the solid and solution state. In presence of chloride anion, the double helical structure unwinds to form an anion-coordinated supramolecular polymeric channel, which in turn rewinds upon the addition of Ag+ salts. Moreover, the formation of the anion-induced supramolecular ion channel results in efficient ion transport across lipid bilayer membranes with excellent chloride selectivity. This work demonstrates anion-cation-assisted stimulus-responsive unwinding and rewinding of artificial double-helix systems, paving way for smart materials with better biomedical applications.
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11
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Mawatari Y, Oouchi M, Yoshida Y, Hiraoki T, Tabata M. Rate Control of Helix Oscillation of Poly(arylacetylene)s Achieved by Design of Side-Group Structures. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Muneki Oouchi
- NMR Facility, Center for Life Science Technologies, RIKEN, 1-7-22 Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan
| | | | - Toshifumi Hiraoki
- Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Masayoshi Tabata
- Faculty of Science and Technology, Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology, 65-758 Bibi, Chitose, Hokkaido 066-8655, Japan
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12
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Ousaka N, Yamamoto S, Iida H, Iwata T, Ito S, Souza R, Hijikata Y, Irle S, Yashima E. Encapsulation of Aromatic Guests in the Bisporphyrin Cavity of a Double-Stranded Spiroborate Helicate: Thermodynamic and Kinetic Studies and the Encapsulation Mechanism. J Org Chem 2021; 86:10501-10516. [PMID: 34282918 DOI: 10.1021/acs.joc.1c01155] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A double-stranded spiroborate helicate bearing a bisporphyrin unit in the middle forms an inclusion complex with electron-deficient aromatic guests that are sandwiched between the porphyrins. In the present study, we systematically investigated the effects of size, electron density, and substituents of a series of aromatic guests on inclusion complex formations within the bisporphyrin. The thermodynamic and kinetic behaviors during the guest-encapsulation process were also investigated in detail. The guest-encapsulation abilities in the helicate increased with the increasing core sizes of the electron-deficient aromatic guests and decreased with the increasing bulkiness and number of substituents of the guests. Among the naphthalenediimide derivatives, those with bulky N-substituents at both ends hardly formed an inclusion complex. Instead, they formed a [2]rotaxane-like inclusion complex through the water-mediated dynamic B-O bond cleavage/reformation of the spiroborate groups of the helicate, which enhanced the conformational flexibility of the helicate to enlarge the bisporphyrin cavity and form an inclusion complex. Based on the X-ray crystal structure of a unique pacman-like 1:1 inclusion complex between the helicate and an ammonium cation as well as the molecular dynamics simulation results, a plausible mechanism for the inclusion of a planar aromatic guest within the helicate is also proposed.
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Affiliation(s)
- Naoki Ousaka
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan.,Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Shinya Yamamoto
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Hiroki Iida
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Takuya Iwata
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Shingo Ito
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Rafael Souza
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan
| | - Yuh Hijikata
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya 464-8601, Japan
| | - Stephan Irle
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya 464-8601, Japan
| | - Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan.,Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
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13
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Hu Y, Teat SJ, Gong W, Zhou Z, Jin Y, Chen H, Wu J, Cui Y, Jiang T, Cheng X, Zhang W. Single crystals of mechanically entwined helical covalent polymers. Nat Chem 2021; 13:660-665. [DOI: 10.1038/s41557-021-00686-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 03/22/2021] [Indexed: 11/09/2022]
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14
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Huang S, Yu H, Li Q. Supramolecular Chirality Transfer toward Chiral Aggregation: Asymmetric Hierarchical Self-Assembly. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2002132. [PMID: 33898167 PMCID: PMC8061372 DOI: 10.1002/advs.202002132] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 12/21/2020] [Indexed: 05/21/2023]
Abstract
Self-assembly, as a typical bottom-up strategy for the fabrication of functional materials, has been applied to fabricate chiral materials with subtle chiral nanostructures. The chiral nanostructures exhibit great potential in asymmetric catalysis, chiral sensing, chiral electronics, photonics, and even the realization of several biological functions. According to existing studies, the supramolecular chirality transfer process combined with hierarchical self-assembly plays a vital role in the fabrication of multiscale chiral structures. This progress report focuses on the hierarchical self-assembly of chiral or achiral molecules that aggregate with asymmetric spatial structures such as twisted bands, helices, and superhelices in different environments. Herein, recent studies on the chirality transfer induced self-assembly based on a variety of supramolecular interactions are summarized. In addition, the influence of different environments and the states of systems including solutions, condensed states, gel systems, interfaces on the asymmetric hierarchical self-assembly, and the expression of chirality are explored. Moreover, both the driving forces that facilitate chiral bias and the supramolecular interactions that play an important role in the expression, transfer, and amplification of the chiral sense are correspondingly discussed.
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Affiliation(s)
- Shuai Huang
- School of Materials Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationPeking UniversityBeijing100871China
- Institute of Advanced MaterialsSchool of Chemistry and Chemical EngineeringSoutheast UniversityNanjingJiangsu Province211189China
| | - Haifeng Yu
- School of Materials Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationPeking UniversityBeijing100871China
| | - Quan Li
- Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary ProgramKent State UniversityKentOH44242USA
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15
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Ousaka N, Itakura M, Nagasaka A, Ito M, Hattori T, Taura D, Ikai T, Yashima E. Water-Mediated Reversible Control of Three-State Double-Stranded Titanium(IV) Helicates. J Am Chem Soc 2021; 143:4346-4358. [PMID: 33688731 DOI: 10.1021/jacs.0c13351] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A stimuli-responsible reversible structural transformation is of key importance in biological systems. We now report a unique water-mediated reversible transformation among three discrete double-stranded dinuclear titanium(IV) achiral meso- and chiral rac-helicates linked by a mono(μ-oxo) or a bis(μ-hydroxo) bridge between the titanium ions through hydration/dehydration or its combination with a water-mediated dynamic cleavage/re-formation of the titanium-phenoxide (Ti-OPh) bonds. The bis(μ-hydroxo) bridged titanium(IV) meso-helicate prepared from two tetraphenol strands with titanium(IV) oxide was readily dehydrated in CD3CN containing a small amount of water upon heating, accompanied by Ti-OPh bond cleavage/re-formation catalyzed by water, resulting in the formation of the mono(μ-oxo)-bridged rac-helicate, which reverted back to the original bis(μ-hydroxo)-bridged meso-helicate upon hydration in aqueous CD3CN. These reversible transformations between the meso- and rac-helicates were also promoted in the presence of a catalytic amount of an acid, which remarkably accelerated the reactions at lower temperature. Interestingly, in anhydrous CD3CN, the bis(μ-hydroxo)-bridged meso-helicate was further slowly converted to a different helicate, while its meso-helicate framework was maintained, namely the mono(μ-oxo)-bridged meso-helicate, through dehydration upon heating and its meso to meso transformation was significantly accelerated in the presence of cryptand[2.2.1], which contributes to removing Na+ ions coordinated to the helicate. Upon cooling, the backward meso to meso transformation took place via hydration. Hence, three different, discrete double-stranded chiral rac- and achiral meso-titanium(IV) helicates linked by a mono(μ-oxo) or a bis(μ-hydroxo) bridge were successfully generated in a controllable manner by a change in the water content of the reaction media.
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Affiliation(s)
- Naoki Ousaka
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.,Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Manabu Itakura
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Akira Nagasaka
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Masaki Ito
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Tomonari Hattori
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Daisuke Taura
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.,Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Tomoyuki Ikai
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.,Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
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16
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Liang L, Li B, Zhang W, Li A, Zheng B, Yang X, Wu B. Fine‐Tuning the Spring‐Like Motion of an Anion‐Based Triple Helicate by Tetraalkylammonium Guests. Angew Chem Int Ed Engl 2021; 60:9389-9394. [DOI: 10.1002/anie.202100294] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Indexed: 11/07/2022]
Affiliation(s)
- Lin Liang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Boyang Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Wenyao Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Anyang Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Bo Zheng
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Xiao‐Juan Yang
- Key Laboratory of Cluster Science of Ministry of Education Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering Ministry of Industry and Information Technology School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China
| | - Biao Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
- Key Laboratory of Cluster Science of Ministry of Education Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering Ministry of Industry and Information Technology School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China
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17
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Liang L, Li B, Zhang W, Li A, Zheng B, Yang X, Wu B. Fine‐Tuning the Spring‐Like Motion of an Anion‐Based Triple Helicate by Tetraalkylammonium Guests. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100294] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lin Liang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Boyang Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Wenyao Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Anyang Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Bo Zheng
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Xiao‐Juan Yang
- Key Laboratory of Cluster Science of Ministry of Education Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering Ministry of Industry and Information Technology School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China
| | - Biao Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University Xi'an 710069 China
- Key Laboratory of Cluster Science of Ministry of Education Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering Ministry of Industry and Information Technology School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China
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18
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Ousaka N, Yashima E. Stimuli-responsive Molecular Springs Based on Single- and Multi-stranded Helical Structures. CHEM LETT 2021. [DOI: 10.1246/cl.200737] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Naoki Ousaka
- Molecular Engineering Institute, Kyushu Institute of Technology, Tobata-ku, Kitakyushu, Fukuoka 804-8550, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
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19
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Atcher J, Mateus P, Kauffmann B, Rosu F, Maurizot V, Huc I. Large-Amplitude Conformational Changes in Self-Assembled Multi-Stranded Aromatic Sheets. Angew Chem Int Ed Engl 2021; 60:2574-2577. [PMID: 33156974 PMCID: PMC7898896 DOI: 10.1002/anie.202014670] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Indexed: 02/03/2023]
Abstract
The orchestration of ever larger conformational changes is made possible by the development of increasingly complex foldamers. Aromatic sheets, a rare motif in synthetic foldamer structures, have been designed so as to form discrete stacks of intercalated aromatic strands through the self‐assembly of two identical subunits. Ion‐mobility ESI‐MS confirms the formation of compact dimers. X‐ray crystallography reveals the existence of two distinct conformational dimeric states that require large changes to interconvert. Molecular dynamics simulation validates the stability of the two conformations and the possibility of their interconversion.
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Affiliation(s)
- Joan Atcher
- Department of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, 81377, München, Germany.,Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, 33600, Pessac, France
| | - Pedro Mateus
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, 33600, Pessac, France
| | - Brice Kauffmann
- Université de Bordeaux, CNRS, Inserm, IECB (UMS 3033-US001), Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, 33600, Pessac, France
| | - Frédéric Rosu
- Université de Bordeaux, CNRS, Inserm, IECB (UMS 3033-US001), Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, 33600, Pessac, France
| | - Victor Maurizot
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, 33600, Pessac, France
| | - Ivan Huc
- Department of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, 81377, München, Germany
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20
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Molecular S = 2 High-Spin, S = 0 Low-Spin and S = 0 ⇄ 2 Spin-Transition/-Crossover Nickel(II)-Bis(nitroxide) Coordination Compounds. INORGANICS 2021. [DOI: 10.3390/inorganics9020010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Heterospin systems have a great advantage in frontier orbital engineering since they utilize a wide diversity of paramagnetic chromophores and almost infinite combinations and mutual geometries. Strong exchange couplings are expected in 3d–2p heterospin compounds, where the nitroxide (aminoxyl) oxygen atom has a direct coordination bond with a nickel(II) ion. Complex formation of nickel(II) salts and tert-butyl 2-pyridyl nitroxides afforded a discrete 2p–3d–2p triad. Ferromagnetic coupling is favored when the magnetic orbitals, nickel(II) dσ and radical π*, are arranged in a strictly orthogonal fashion, namely, a planar coordination structure is characterized. In contrast, a severe twist around the coordination bond gives an orbital overlap, resulting in antiferromagnetic coupling. Non-chelatable nitroxide ligands are available for highly twisted and practically diamagnetic complexes. Here, the Ni–O–N–Csp2 torsion (dihedral) angle is supposed to be a useful metric to describe the nickel ion dislocated out of the radical π* nodal plane. Spin-transition complexes exhibited a planar coordination structure in a high-temperature phase and a nonplanar structure in a low-temperature phase. The gradual spin transition is described as a spin equilibrium obeying the van’t Hoff law. Density functional theory calculation indicates that the energy level crossing of the high- and low-spin states. The optimized structures of diamagnetic and high-spin states well agreed with the experimental large and small torsions, respectively. The novel mechanism of the present spin transition lies in the ferro-/antiferromagnetic coupling switch. The entropy-driven mechanism is plausible after combining the results of the related copper(II)-nitroxide compounds. Attention must be paid to the coupling parameter J as a variable of temperature in the magnetic analysis of such spin-transition materials. For future work, the exchange coupling may be tuned by chemical modification and external stimulus, because it has been clarified that the parameter is sensitive to the coordination structure and actually varies from 2J/kB = +400 K to −1400 K.
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21
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Li J, Shen P, Zhen S, Tang C, Ye Y, Zhou D, Hong W, Zhao Z, Tang BZ. Mechanical single-molecule potentiometers with large switching factors from ortho-pentaphenylene foldamers. Nat Commun 2021; 12:167. [PMID: 33420002 PMCID: PMC7794330 DOI: 10.1038/s41467-020-20311-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 11/24/2020] [Indexed: 11/22/2022] Open
Abstract
Molecular potentiometers that can indicate displacement-conductance relationship, and predict and control molecular conductance are of significant importance but rarely developed. Herein, single-molecule potentiometers are designed based on ortho-pentaphenylene. The ortho-pentaphenylene derivatives with anchoring groups adopt multiple folded conformers and undergo conformational interconversion in solutions. Solvent-sensitive multiple conductance originating from different conformers is recorded by scanning tunneling microscopy break junction technique. These pseudo-elastic folded molecules can be stretched and compressed by mechanical force along with a variable conductance by up to two orders of magnitude, providing an impressively higher switching factor (114) than the reported values (ca. 1~25). The multichannel conductance governed by through-space and through-bond conducting pathways is rationalized as the charge transport mechanism for the folded ortho-pentaphenylene derivatives. These findings shed light on exploring robust single-molecule potentiometers based on helical structures, and are conducive to fundamental understanding of charge transport in higher-order helical molecules.
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Affiliation(s)
- Jinshi Li
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 510640, Guangzhou, China
| | - Pingchuan Shen
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 510640, Guangzhou, China
| | - Shijie Zhen
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 510640, Guangzhou, China
| | - Chun Tang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Yiling Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Dahai Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Wenjing Hong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China.
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 510640, Guangzhou, China.
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 510640, Guangzhou, China
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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22
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Taura D, Wang X, Ito M, Yashima E. Selective formation of spiroborate-based double-stranded hetero-helicates assisted by donor–acceptor interactions. Org Chem Front 2021. [DOI: 10.1039/d1qo00286d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel spiroborate-based double-stranded hetero-helicate is selectively formed through donor–acceptor interactions between the central electron-rich porphyrin and electron-deficient naphthalene diimide units.
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Affiliation(s)
- Daisuke Taura
- Department of Molecular and Macromolecular Chemistry
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Xiang Wang
- Department of Molecular and Macromolecular Chemistry
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Masaki Ito
- Department of Molecular and Macromolecular Chemistry
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
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23
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Atcher J, Mateus P, Kauffmann B, Rosu F, Maurizot V, Huc I. Umfangreiche Konformationsänderungen in selbstassemblierten mehrsträngigen aromatischen Faltblättern. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202014670] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Joan Atcher
- Department of Pharmacy and Center for Integrated Protein Science Ludwig-Maximilians-Universität Butenandtstraße 5–13 81377 München Deutschland
- Université de Bordeaux CNRS, Bordeaux Institut National Polytechnique CBMN (UMR 5248) Institut Européen de Chimie et Biologie 2 rue Robert Escarpit 33600 Pessac Frankreich
| | - Pedro Mateus
- Université de Bordeaux CNRS, Bordeaux Institut National Polytechnique CBMN (UMR 5248) Institut Européen de Chimie et Biologie 2 rue Robert Escarpit 33600 Pessac Frankreich
| | - Brice Kauffmann
- Université de Bordeaux CNRS Inserm, IECB (UMS 3033 – US001) Institut Européen de Chimie et Biologie 2 rue Robert Escarpit 33600 Pessac Frankreich
| | - Frédéric Rosu
- Université de Bordeaux CNRS Inserm, IECB (UMS 3033 – US001) Institut Européen de Chimie et Biologie 2 rue Robert Escarpit 33600 Pessac Frankreich
| | - Victor Maurizot
- Université de Bordeaux CNRS, Bordeaux Institut National Polytechnique CBMN (UMR 5248) Institut Européen de Chimie et Biologie 2 rue Robert Escarpit 33600 Pessac Frankreich
| | - Ivan Huc
- Department of Pharmacy and Center for Integrated Protein Science Ludwig-Maximilians-Universität Butenandtstraße 5–13 81377 München Deutschland
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24
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Zhou L, Xu X, Jiang Z, Xu L, Chu B, Liu N, Wu Z. Selective Synthesis of Single‐Handed Helical Polymers from Achiral Monomer and a Mechanism Study on Helix‐Sense‐Selective Polymerization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011661] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Li Zhou
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Xun‐Hui Xu
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Zhi‐Qiang Jiang
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Lei Xu
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Ben‐Fa Chu
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Na Liu
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Zong‐Quan Wu
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
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25
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Zhou L, Xu X, Jiang Z, Xu L, Chu B, Liu N, Wu Z. Selective Synthesis of Single‐Handed Helical Polymers from Achiral Monomer and a Mechanism Study on Helix‐Sense‐Selective Polymerization. Angew Chem Int Ed Engl 2020; 60:806-812. [DOI: 10.1002/anie.202011661] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/30/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Li Zhou
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Xun‐Hui Xu
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Zhi‐Qiang Jiang
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Lei Xu
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Ben‐Fa Chu
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Na Liu
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
| | - Zong‐Quan Wu
- Department of polymer science and engineering School of chemistry and chemical engineering Anhui Key Lab of Catalytic Materials and Reaction Engineering Hefei university of Technology 193 Tunxi Road, Hefei 230009 Anhui China
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26
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Ito M, Ikai T, Yamamoto S, Taura D, Ousaka N, Yashima E. Chiral Guest-induced Catalytic Deracemization of a Spiroborate-based Double-stranded Helicate Bearing a Bisporphyrin Unit with Acids. CHEM LETT 2020. [DOI: 10.1246/cl.200352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Masaki Ito
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Tomoyuki Ikai
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Shinya Yamamoto
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Daisuke Taura
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Naoki Ousaka
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
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27
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Bispicolyamine-Based Supramolecular Polymeric Gels Induced by Distinct Different Driving Forces with and Without Zn 2. Int J Mol Sci 2020; 21:ijms21134617. [PMID: 32610553 PMCID: PMC7369882 DOI: 10.3390/ijms21134617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/24/2020] [Accepted: 06/26/2020] [Indexed: 01/04/2023] Open
Abstract
Metal-coordination polymeric gels are interesting areas as organic/inorganic hybrid supramolecular materials. The bispicolylamine (BPA) based gelator (1) showed excellent gelation with typical fibrillar morphology in acetonitrile. Upon complexing 1 with Zn2+, complexes ([1 + Zn + ACN]2+ and [1 + zinc trifluoromethanesulfonate (ZnOTf)]+) with four coordination numbers were formed, which determine the gel structure significantly. A gel-sol transition was induced, driven by the ratio of the two metal complexes produced. Through nuclear magnetic resonance analysis, the driving forces in the gel formation (i.e., hydrogen-bonding and π-π stacking) were observed in detail. In the absence and the presence of Zn2+, the intermolecular hydrogen-bonds and π-π stacking were the primary driving forces in the gel formation, respectively. In addition, the supramolecular gels exhibited a monolayer lamellar structure irrespective of Zn2+. Conclusively, the gels' elasticity and viscosity reduced in the presence of Zn2+.
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28
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Qiu Y, Yan H, Wang J, Jiang Q, Wang H, Peng H, Liao Y, Xie X, Brycki BE. Concurrent helix extension and chirality enhancement for an artificial helical foldamer complexed with sterically hindered chiral molecules. POLYMER 2020. [DOI: 10.1016/j.polymer.2019.122135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Choi H, Heo S, Lee S, Kim KY, Lim JH, Jung SH, Lee SS, Miyake H, Lee JY, Jung JH. Kinetically controlled Ag +-coordinated chiral supramolecular polymerization accompanying a helical inversion. Chem Sci 2019; 11:721-730. [PMID: 34123045 PMCID: PMC8146097 DOI: 10.1039/c9sc04958d] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 11/11/2019] [Indexed: 11/21/2022] Open
Abstract
We report kinetically controlled chiral supramolecular polymerization based on ligand-metal complex with a 3 : 2 (L : Ag+) stoichiometry accompanying a helical inversion in water. A new family of bipyridine-based ligands (d-L1, l-L1, d-L2, and d-L3) possessing hydrazine and d- or l-alanine moieties at the alkyl chain groups has been designed and synthesized. Interestingly, upon addition of AgNO3 (0.5-1.3 equiv.) to the d-L1 solution, it generated the aggregate I composed of the d-L1AgNO3 complex (d-L1 : Ag+ = 1 : 1) as the kinetic product with a spherical structure. Then, aggregate I (nanoparticle) was transformed into the aggregate II (supramolecular polymer) based on the (d-L1)3Ag2(NO3)2 complex as the thermodynamic product with a fiber structure, which led to the helical inversion from the left-handed (M-type) to the right-handed (P-type) helicity accompanying CD amplification. In contrast, the spherical aggregate I (nanoparticle) composed of the d-L1AgNO3 complex with the left-handed (M-type) helicity formed in the presence of 2.0 equiv. of AgNO3 and was not additionally changed, which indicated that it was the thermodynamic product. The chiral supramolecular polymer based on (d-L1)3Ag2(NO3)2 was produced via a nucleation-elongation mechanism with a cooperative pathway. In thermodynamic study, the standard ΔG° and ΔH e values for the aggregates I and II were calculated using the van't Hoff plot. The enhanced ΔG° value of the aggregate II compared to that of the formation of aggregate I confirms that aggregate II was thermodynamically more stable. In the kinetic study, the influence of concentration of AgNO3 confirmed the initial formation of the aggregate I (nanoparticle), which then evolved to the aggregate II (supramolecular polymer). Thus, the concentration of the (d-L1)3Ag2(NO3)2 complex in the initial state plays a critical role in generating aggregate II (supramolecular polymer). In particular, NO3 - acts as a critical linker and accelerator in the transformation from the aggregate I to the aggregate II. This is the first example of a system for a kinetically controlled chiral supramolecular polymer that is formed via multiple steps with coordination structural change.
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Affiliation(s)
- Heekyoung Choi
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University Jinju 660-701 Republic of Korea
| | - Sojeong Heo
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University Jinju 660-701 Republic of Korea
| | - Seonae Lee
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University Jinju 660-701 Republic of Korea
| | - Ka Young Kim
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University Jinju 660-701 Republic of Korea
| | - Jong Hyeon Lim
- Department of Chemistry, Sungkyunkwan University Suwon 16419 Republic of Korea
| | - Sung Ho Jung
- Department of Liberal Arts, Gyeongnam National University of Science and Technology (GNTECH) Jinju 52725 Republic of Korea
| | - Shim Sung Lee
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University Jinju 660-701 Republic of Korea
| | - Hiroyuki Miyake
- Department of Chemistry, Graduate School of Science, Osaka City University Osaka 558-8585 Japan
| | - Jin Yong Lee
- Department of Chemistry, Sungkyunkwan University Suwon 16419 Republic of Korea
| | - Jong Hwa Jung
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University Jinju 660-701 Republic of Korea
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Goswami A, Saha S, Biswas PK, Schmittel M. (Nano)mechanical Motion Triggered by Metal Coordination: from Functional Devices to Networked Multicomponent Catalytic Machinery. Chem Rev 2019; 120:125-199. [DOI: 10.1021/acs.chemrev.9b00159] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Abir Goswami
- Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strase 2, D-57068 Siegen, Germany
| | - Suchismita Saha
- Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strase 2, D-57068 Siegen, Germany
| | - Pronay Kumar Biswas
- Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strase 2, D-57068 Siegen, Germany
| | - Michael Schmittel
- Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strase 2, D-57068 Siegen, Germany
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31
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Chen X, Mevissen C, Huda S, Göb C, Oppel IM, Albrecht M. Cation‐Controlled Formation and Interconversion of the
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Stereoisomers of a Triple‐Stranded Helicate. Angew Chem Int Ed Engl 2019; 58:12879-12882. [DOI: 10.1002/anie.201904181] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/07/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Xiaofei Chen
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Christian Mevissen
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Saskia Huda
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Christian Göb
- Institut für Anorganische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Iris M. Oppel
- Institut für Anorganische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Markus Albrecht
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Germany
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32
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Chen X, Mevissen C, Huda S, Göb C, Oppel IM, Albrecht M. Kationen‐gesteuerte Bildung und Umwandlung der
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‐Stereoisomere eines dreisträngigen Helicats. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904181] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Xiaofei Chen
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Christian Mevissen
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Saskia Huda
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Christian Göb
- Institut für Anorganische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Iris M. Oppel
- Institut für Anorganische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Markus Albrecht
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
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33
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Gole B, Kauffmann B, Maurizot V, Huc I, Ferrand Y. Light‐Controlled Conformational Switch of an Aromatic Oligoamide Foldamer. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902378] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Bappaditya Gole
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
| | - Brice Kauffmann
- Université de Bordeaux CNRS INSERM, UMS3033 Institut Européen de Chimie et Biologie (IECB) 2 rue Robert Escarpit 33600 Pessac France
| | - Victor Maurizot
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
| | - Ivan Huc
- Department of Pharmacy and Center for Integrated Protein Science Ludwig-Maximilians-Universität Butenandtstr. 5–13 81377 München Germany
| | - Yann Ferrand
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
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34
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Gole B, Kauffmann B, Maurizot V, Huc I, Ferrand Y. Light‐Controlled Conformational Switch of an Aromatic Oligoamide Foldamer. Angew Chem Int Ed Engl 2019; 58:8063-8067. [DOI: 10.1002/anie.201902378] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Bappaditya Gole
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
| | - Brice Kauffmann
- Université de Bordeaux CNRS INSERM, UMS3033 Institut Européen de Chimie et Biologie (IECB) 2 rue Robert Escarpit 33600 Pessac France
| | - Victor Maurizot
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
| | - Ivan Huc
- Department of Pharmacy and Center for Integrated Protein Science Ludwig-Maximilians-Universität Butenandtstr. 5–13 81377 München Germany
| | - Yann Ferrand
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
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35
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Ousaka N, Yamamoto S, Iida H, Iwata T, Ito S, Hijikata Y, Irle S, Yashima E. Water-mediated deracemization of a bisporphyrin helicate assisted by diastereoselective encapsulation of chiral guests. Nat Commun 2019; 10:1457. [PMID: 30926811 PMCID: PMC6441078 DOI: 10.1038/s41467-019-09443-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 03/06/2019] [Indexed: 11/19/2022] Open
Abstract
Deracemization is a powerful method by which a racemic mixture can be transformed into an excess of one enantiomer with the aid of chiral auxiliaries, but has been applied only to small chiral molecular systems. Here we report a deracemization of a racemic double-stranded spiroborate helicate containing a bisporphyrin unit upon encapsulation of chiral aromatic guests between the bisporphyrin. The chiral guest-included helicate is kinetically stable, existing as a mixture of right- and left-handed double helices, which eventually undergo an inversion of the helicity triggered by water resulting from the water-mediated reversible diastereoselective B-O bond cleavage/reformation of the spiroborate groups, thus producing an optically-active helicate with a high enantioselectivity. Quantum chemical calculations suggest that the stereospecific CH-π interactions between the porphyrin hydrogen atoms of the helicate and an aromatic pendant group of the chiral guest play a key role in the enhancement of the helical handedness of the helicate.
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Affiliation(s)
- Naoki Ousaka
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan
| | - Shinya Yamamoto
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan
| | - Hiroki Iida
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue, 690-8504, Japan
| | - Takuya Iwata
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan
| | - Shingo Ito
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, 464-8602, Japan
| | - Yuh Hijikata
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, 464-8602, Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, 464-8601, Japan
| | - Stephan Irle
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, 464-8602, Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, 464-8601, Japan
- Computational Sciences & Engineering Division, Oak Ridge National Laboratory, Oak Ridge, 37831-6493, TN, USA
| | - Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan.
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan.
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36
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Taura D, Shimizu K, Yokota C, Ikeda R, Suzuki Y, Iida H, Ousaka N, Yashima E. Fluorescent molecular spring that visualizes the extension and contraction motions of a double-stranded helicate bearing terminal pyrene units triggered by release and binding of alkali metal ions. Chem Commun (Camb) 2019; 55:12084-12087. [DOI: 10.1039/c9cc06126f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A unique springlike motion of a fluorescent pyrene-terminated double-stranded helicate is visualized by the catch and release of alkali metal ions.
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Affiliation(s)
- Daisuke Taura
- Department of Molecular and Macromolecular Chemistry
- Graduate School of Engineering
- Nagoya University
- Japan
- Department of Molecular Design and Engineering
| | - Kaori Shimizu
- Department of Molecular Design and Engineering
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Chiaki Yokota
- Department of Molecular Design and Engineering
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Riho Ikeda
- Department of Molecular and Macromolecular Chemistry
- Graduate School of Engineering
- Nagoya University
- Japan
| | - Yoshimasa Suzuki
- Department of Molecular Design and Engineering
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Hiroki Iida
- Department of Molecular Design and Engineering
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - Naoki Ousaka
- Department of Molecular and Macromolecular Chemistry
- Graduate School of Engineering
- Nagoya University
- Japan
- Department of Molecular Design and Engineering
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry
- Graduate School of Engineering
- Nagoya University
- Japan
- Department of Molecular Design and Engineering
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37
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Tan J, Wang C, Lao HK, Wang W, Feng G, Yuan D, Wu C, Zhang X. Spiro[pyrrol-benzopyran]-based probe with high asymmetry for chiroptical sensing via circular dichroism. Chem Commun (Camb) 2019; 55:7438-7441. [DOI: 10.1039/c9cc02946j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We proposed an efficient approach to construct a novel spiro[pyrrol-benzopyran] scaffold with high asymmetry for reaction-based chiroptical sensing via circular dichroism.
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Affiliation(s)
- Jingyun Tan
- Cancer Centre
- Faculty of Health Sciences
- University of Macau
- Macau SAR
- China
| | - Chunfei Wang
- Cancer Centre
- Faculty of Health Sciences
- University of Macau
- Macau SAR
- China
| | - Hio Kuan Lao
- Cancer Centre
- Faculty of Health Sciences
- University of Macau
- Macau SAR
- China
| | - Wenjing Wang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou 350002
- China
| | - Gang Feng
- Cancer Centre
- Faculty of Health Sciences
- University of Macau
- Macau SAR
- China
| | - Daqiang Yuan
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou 350002
- China
| | - Changfeng Wu
- Department of Biomedical Engineering
- Southern University of Science and Technology
- Shenzhen 518055
- China
| | - Xuanjun Zhang
- Cancer Centre
- Faculty of Health Sciences
- University of Macau
- Macau SAR
- China
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Van Craen D, Schlottmann M, Stahl W, Räuber C, Albrecht M. Kinetic investigation of the dissociation of dinuclear hierarchically assembled titanium( iv) helicates. Dalton Trans 2019; 48:10574-10580. [DOI: 10.1039/c9dt01065c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hierarchically assembled helicates consisting of lithium-bridged triscatecholate titanium(iv) complexes represent a powerful self-assembled supramolecular system with applications as e.g. molecular balances for the evaluation of weak interactions, stereoselectivity switches in asymmetric synthesis or molecular switches.
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Affiliation(s)
- David Van Craen
- Institut für Organische Chemie
- RWTH Aachen University
- 52074 Aachen
- Germany
| | | | - Wolfgang Stahl
- Institut für Physikalische Chemie
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Christoph Räuber
- Institut für Organische Chemie
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Markus Albrecht
- Institut für Organische Chemie
- RWTH Aachen University
- 52074 Aachen
- Germany
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