1
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Liu Y, Hao A, Xing P. Ultrasensitive Solvatochirochromism of Single Benzene Chromophores. Chemistry 2024; 30:e202400059. [PMID: 38409631 DOI: 10.1002/chem.202400059] [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: 01/05/2024] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 02/28/2024]
Abstract
Solvents influence the structure, aggregation and folding behaviors of solvatochromic compounds. Ultrasensitive solvent mediated chiroptical response is conducive to the fabrication of molecular platform for sensing and recognition, which however, remains great challenges in conceptual or applicable design. Here we report a cysteine-based single benzene chromophore system that shows ultrasensitivity to solvents. Compared to the ratiometrically responsive systems, the chiroptical activities could be triggered or inverted depending on the substituents of chiral entities with an ultralow solvent volume fraction (<1 vol %). One drop of dipolar solvents shall significantly induce the emergence or inversion of chiroptical signals in bulky phases. Based on the experimental and computational studies, the ultrasensitivity is contributed to the intimate interplay between solvents and chiral compounds that anchors the specific chiral conformation. It illustrates that structurally simple organic compounds without aggregation or folding behaviors possess pronounced solvatochiroptical properties, which sheds light on the next-generation of chiroptical sensors and switches.
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Affiliation(s)
- Yiping Liu
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, People's Republic of China
| | - Aiyou Hao
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, People's Republic of China
| | - Pengyao Xing
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, People's Republic of China
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2
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Stimuli-responsive chirality inversion of metallohelices and related dynamic metal complexes. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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3
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Xue W, Ronson TK, Lu Z, Nitschke JR. Solvent Drives Switching between Λ and Δ Metal Center Stereochemistry of M 8L 6 Cubic Cages. J Am Chem Soc 2022; 144:6136-6142. [PMID: 35364808 PMCID: PMC9098163 DOI: 10.1021/jacs.2c00245] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
An
enantiopure ligand with four bidentate metal-binding sites and
four (S)-carbon stereocenters self-assembles with
octahedral ZnII or CoII to produce O-symmetric M8L6 coordination cages. The Λ-
or Δ-handedness of the metal centers forming the corners of
these cages is determined by the solvent environment: the same (S)-ligand produces one diastereomer, (S)24-Λ8-M8L6, in
acetonitrile but another with opposite metal-center handedness, (S)24-Δ8-M8L6, in nitromethane. Van ’t Hoff analysis revealed the Δ
stereochemical configuration to be entropically favored but enthalpically
disfavored, consistent with a loosening of the coordination sphere
and an increase in conformational freedom following Λ-to-Δ
transition. The binding of 4,4′-dipyridyl naphthalenediimide
and tetrapyridyl Zn-porphyrin guests did not interfere with the solvent-driven
stereoselectivity of self-assembly, suggesting applications where
either a Λ- or Δ-handed framework may enable chiral separations
or catalysis.
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Affiliation(s)
- Weichao Xue
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
| | - Tanya K Ronson
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
| | - Zifei Lu
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
| | - Jonathan R Nitschke
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom
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4
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Sahoo D, Benny R, Ks NK, De S. Stimuli-Responsive Chiroptical Switching. Chempluschem 2021; 87:e202100322. [PMID: 34694736 DOI: 10.1002/cplu.202100322] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 09/23/2021] [Indexed: 12/16/2022]
Abstract
"Chirality" governs many fundamental properties in chemistry and biochemistry. While early investigations on stereochemistry are primarily dedicated to static chirality, there is an increasing interest in the field of dynamic chirality (chiral switches). These chiral switches are essential in controlling the directionality in molecular motors. Dynamic chiralities are equally crucial in switchable stereoselectivity, switchable asymmetric catalysis and enantioselective separation. Herein, we limit our discussion to recent advances on stimuli-induced chiroptical switching of axial, helical, and planar chirality in response to external stimuli. We also discuss a few examples of applications of the switchable chirality.
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Affiliation(s)
- Diptiprava Sahoo
- School of Chemistry, Indian Institute of Science Education and, Research Thiruvananthapuram (IISER-TVM), Thiruvananthapuram, 695551, India
| | - Renitta Benny
- School of Chemistry, Indian Institute of Science Education and, Research Thiruvananthapuram (IISER-TVM), Thiruvananthapuram, 695551, India
| | - Nithish Kumar Ks
- School of Chemistry, Indian Institute of Science Education and, Research Thiruvananthapuram (IISER-TVM), Thiruvananthapuram, 695551, India
| | - Soumen De
- School of Chemistry, Indian Institute of Science Education and, Research Thiruvananthapuram (IISER-TVM), Thiruvananthapuram, 695551, India
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5
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Saha B, Ikbal SA, Rath SP. Complexation of Chiral Zinc(II)Porphyrin Tweezer with Chiral Guests: Control, Discrimination and Rationalization of Supramolecular Chirality. Inorg Chem 2020; 59:7795-7809. [DOI: 10.1021/acs.inorgchem.0c00877] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Bapan Saha
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Sk Asif Ikbal
- 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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6
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Dhamija A, Saha B, Chandel D, Malik H, Rath SP. Molecule to Supramolecule: Chirality Induction, Inversion, and Amplification in a Mg(II)porphyrin Dimer Templated by Chiral Diols. Inorg Chem 2019; 59:801-809. [DOI: 10.1021/acs.inorgchem.9b03062] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Avinash Dhamija
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Bapan Saha
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Dolly Chandel
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Himani Malik
- 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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7
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Imai Y, Yuasa J. Supramolecular chirality transformation driven by monodentate ligand binding to a coordinatively unsaturated self-assembly based on C 3-symmetric ligands. Chem Sci 2019; 10:4236-4245. [PMID: 31057752 PMCID: PMC6471804 DOI: 10.1039/c9sc00399a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 03/01/2019] [Indexed: 01/04/2023] Open
Abstract
Monodentate ligand binding is facilitated by supramolecular chirality transformations from propeller-shaped chirality into single-twist chirality by altering the self-assembly of C 3-symmetric chiral ligands. The C 3-symmetric chiral ligands (Im R 3Bz and Im S 3Bz) contain three chiral imidazole side arms (Im R and Im S ) at the 1,3,5-positions of a central benzene ring. Upon coordination to zinc ions (Zn2+), which have a tetrahedral coordination preference, the C 3-symmetric chiral ligands assemble, in a stepwise manner, into a propeller-shaped assembly with a general formula (Im( R or S ) 3Bz)4(Zn2+)3. In this structure each Zn2+ ion coordinates to the three individual imidazole side arms. The resulting assembly is formally coordinatively unsaturated (coordination number, n = 3) and capable of accepting monodentate co-ligands (imidazole: ImH2) to afford a coordinatively saturated assembly [(ImH2)3(Im R 3Bz)4(Zn2+)3]. The preformed propeller-shaped chirality is preserved during this transformation. However, an excess of the monodentate co-ligand (ImH2/Zn2+ molar ratio of ∼1.7) alters the propeller-shaped assembly into a stacked dimer assembly [(ImH2) m (Im R 3Bz)2(Zn2+)3] (m = 4-6) with single-twist chirality. This switch alters the degree of enhancement and the circular dichroism (CD) pattern, suggesting a structural transition into a chiral object with a different shape. This architectural chirality transformation presents a new approach to forming dynamic coordination-assemblies, which have transformable geometric chiral structures.
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Affiliation(s)
- Yuki Imai
- Department of Applied Chemistry , Tokyo University of Science , 1-3, Kagurazaka, Shinjuku , Tokyo 162-8601 , Japan .
| | - Junpei Yuasa
- Department of Applied Chemistry , Tokyo University of Science , 1-3, Kagurazaka, Shinjuku , Tokyo 162-8601 , Japan .
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8
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Goszczycki P, Stadnicka KM, Musielak B, Ostrowska K. Cobalt(II), copper(II), and zinc(II) isostructural, pseudotetrahedral, racemic complexes of pyrrolo[2,3-b]quinoxaline with bis(2-thienylmethyl)propylenediamine chain: Synthesis, crystal structure, spectroscopy. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Heteroleptic copper phenanthroline complexes in motion: From stand-alone devices to multi-component machinery. Coord Chem Rev 2018; 376:478-505. [PMID: 32287354 PMCID: PMC7126816 DOI: 10.1016/j.ccr.2018.08.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 07/07/2018] [Accepted: 08/13/2018] [Indexed: 12/27/2022]
Abstract
Two and a half decades of copper phenanthroline-based switches, devices and machines have illustrated the rich dynamic nature of these metal complexes. With an emphasis on the metal-ligand dissociation as the rate-determining step the present review summarizes not only spectacular examples of machinery, but also highlights rate data collected during a variety of investigations. Copper-ligand exchange reactions are mostly triggered by redox processes, addition of metal ions or addition of ligands. While the rate data spread over >8 orders of magnitude, individual effects of solvent, steric bulk, flexibility, σ-basicity and the trajectory (intra- vs. intermolecular dissociation) have large impact. Unfortunately, in many cases the exact mechanism in the rate-determining step (nucleophile-induced vs. monomolecular metal-ligand dissociation) has not been determined, suggesting to invest further efforts in the physical (in)organic chemistry of such coordination-driven systems.
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10
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Wada S, Kitagawa Y, Nakanishi T, Gon M, Tanaka K, Fushimi K, Chujo Y, Hasegawa Y. Electronic chirality inversion of lanthanide complex induced by achiral molecules. Sci Rep 2018; 8:16395. [PMID: 30401813 PMCID: PMC6219555 DOI: 10.1038/s41598-018-34790-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 10/25/2018] [Indexed: 12/27/2022] Open
Abstract
A novel mechanism for chiroptical activity inversion based on the electronic structure of metal complexes without Λ- or Δ-type structure change was demonstrated spectroscopically and theoretically. To demonstrate the mechanism, a europium (Eu(III)) complex with chiral (+)-3-(trifluoroacetyl)camphor (+tfc) and achiral triphenylphosphine oxide (tppo) was prepared. The steric and electronic structures of the Eu(III) complex were adjusted by additional achiral tppo and coordinating acetone molecules, and were characterised by 1H NMR, photoluminescence, and emission lifetime measurements. The optical activity of the Eu(III) complex in solution was evaluated by circularly polarized luminescence (CPL) measurements. CPL sign inversion, which was independent of Λ- or Δ-type structure changes from the spectroscopic viewpoint, and a drastic CPL intensity enhancement were observed depending on the external achiral molecules around Eu(III) ion. These phenomena provide the first clarification of optical activity change associated with electronic structure rather than chiral coordination structure-type (Λ or Δ) under external environments.
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Affiliation(s)
- Satoshi Wada
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, N13 W8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
| | - Yuichi Kitagawa
- Faculty of Engineering, Hokkaido University, N13 W8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
| | - Takayuki Nakanishi
- Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo, 125-8585, Japan
| | - Masayuki Gon
- Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kazuo Tanaka
- Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Koji Fushimi
- Faculty of Engineering, Hokkaido University, N13 W8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
| | - Yoshiki Chujo
- Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yasuchika Hasegawa
- Faculty of Engineering, Hokkaido University, N13 W8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
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11
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Dobscha JR, Debnath S, Fadler RE, Fatila EM, Pink M, Raghavachari K, Flood AH. Host–Host Interactions Control Self‐assembly and Switching of Triple and Double Decker Stacks of Tricarbazole Macrocycles Co‐assembled with anti‐Electrostatic Bisulfate Dimers. Chemistry 2018; 24:9841-9852. [DOI: 10.1002/chem.201800827] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Indexed: 12/20/2022]
Affiliation(s)
- James R. Dobscha
- Department of Chemistry Indiana University 800 E. Kirkwood Avenue Bloomington IN 47405 USA
| | - Sibali Debnath
- Department of Chemistry Indiana University 800 E. Kirkwood Avenue Bloomington IN 47405 USA
| | - Rachel E. Fadler
- Department of Chemistry Indiana University 800 E. Kirkwood Avenue Bloomington IN 47405 USA
| | - Elisabeth M. Fatila
- Department of Chemistry Indiana University 800 E. Kirkwood Avenue Bloomington IN 47405 USA
- Current address: Department of Chemistry Louisiana Tech University 1 Adams Boulevard Ruston LA 71272 USA
| | - Maren Pink
- Department of Chemistry Indiana University 800 E. Kirkwood Avenue Bloomington IN 47405 USA
| | - Krishnan Raghavachari
- Department of Chemistry Indiana University 800 E. Kirkwood Avenue Bloomington IN 47405 USA
| | - Amar H. Flood
- Department of Chemistry Indiana University 800 E. Kirkwood Avenue Bloomington IN 47405 USA
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12
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Sharma B, Singh A, Sarma TK, Sardana N, Pal A. Chirality control of multi-stimuli responsive and self-healing supramolecular metallo-hydrogels. NEW J CHEM 2018. [DOI: 10.1039/c8nj00218e] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The spontaneous formation of supramolecular metallo-hydrogels showing multi stimuli-responsiveness and intrinsic self-healing properties upon the interaction of chiral-histidine with Zn2+ ions.
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Affiliation(s)
| | | | - Tridib K. Sarma
- Discipline of Chemistry
- Indian Institute of Technology
- Indore-453552
- India
| | - Neha Sardana
- Institute of Nano Science and Technology
- Mohali
- India
| | - Asish Pal
- Institute of Nano Science and Technology
- Mohali
- India
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13
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Kokan Z, Perić B, Vazdar M, Marinić Ž, Vikić-Topić D, Meštrović E, Kirin SI. Metal-induced supramolecular chirality inversion of small self-assembled molecules in solution. Chem Commun (Camb) 2017; 53:1945-1948. [DOI: 10.1039/c6cc09203a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of supramolecular chirality inversion of small self-assembled ligands in solution by complexation to metal ions is presented.
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14
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Paikar A, Haldar D. Dynamic self-assembled polymer: HCl responsive inversion of supramolecular polymer handedness. RSC Adv 2017. [DOI: 10.1039/c7ra08035b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Discotic trisamide formed a self-assembled polymer and exhibits inversion of supramolecular polymer handedness in the presence of HCl.
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Affiliation(s)
- Arpita Paikar
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- India
| | - Debasish Haldar
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- India
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15
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Gregoliński J, Hikita M, Sakamoto T, Sugimoto H, Tsukube H, Miyake H. Redox-Triggered Helicity Inversion in Chiral Cobalt Complexes in Combination with H+ and NO3– Stimuli. Inorg Chem 2016; 55:633-43. [DOI: 10.1021/acs.inorgchem.5b01902] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Janusz Gregoliński
- Department
of Chemistry, Graduate School of Science, and ⊥JST, CREST, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Masahiro Hikita
- Department
of Chemistry, Graduate School of Science, and ⊥JST, CREST, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Tatsuya Sakamoto
- Department
of Chemistry, Graduate School of Science, and ⊥JST, CREST, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hideki Sugimoto
- Department
of Chemistry, Graduate School of Science, and ⊥JST, CREST, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hiroshi Tsukube
- Department
of Chemistry, Graduate School of Science, and ⊥JST, CREST, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hiroyuki Miyake
- Department
of Chemistry, Graduate School of Science, and ⊥JST, CREST, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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16
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Kaur R, Vikas. Mechanisms for the inversion of chirality: global reaction route mapping of stereochemical pathways in a probable chiral extraterrestrial molecule, 2-aminopropionitrile. J Chem Phys 2015; 142:074307. [PMID: 25702015 DOI: 10.1063/1.4907593] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
2-Aminopropionitrile (APN), a probable candidate as a chiral astrophysical molecule, is a precursor to amino-acid alanine. Stereochemical pathways in 2-APN are explored using Global Reaction Route Mapping (GRRM) method employing high-level quantum-mechanical computations. Besides predicting the conventional mechanism for chiral inversion that proceeds through an achiral intermediate, a counterintuitive flipping mechanism is revealed for 2-APN through chiral intermediates explored using the GRRM. The feasibility of the proposed stereochemical pathways, in terms of the Gibbs free-energy change, is analyzed at the temperature conditions akin to the interstellar medium. Notably, the stereoinversion in 2-APN is observed to be more feasible than the dissociation of 2-APN and intermediates involved along the stereochemical pathways, and the flipping barrier is observed to be as low as 3.68 kJ/mol along one of the pathways. The pathways proposed for the inversion of chirality in 2-APN may provide significant insight into the extraterrestrial origin of life.
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Affiliation(s)
- Ramanpreet Kaur
- Quantum Chemistry Group, Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
| | - Vikas
- Quantum Chemistry Group, Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India
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17
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Gregoliński J, Ślepokura K, Lisowski J. Lanthanide(iii) and lead(ii) complexes of a chiral nonaaza macrocyclic amine based on 1,2-diaminocyclopentane. Dalton Trans 2015; 44:16345-51. [DOI: 10.1039/c5dt02478a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis, spectroscopic characterization and X-ray crystal structures of a series of helical complexes of a new chiral macrocycle based on diaminocyclopentane fragments. In the case of a Pb(ii) derivative the NMR data indicate a dynamic process corresponding to partial wrapping and unwrapping of the macrocycle resulting in the switching of the helix axis.
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Affiliation(s)
| | | | - Jerzy Lisowski
- Department of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
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18
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Yeung CT, Chan WTK, Yan SC, Yu KL, Yim KH, Wong WT, Law GL. Lanthanide supramolecular helical diastereoselective breaking induced by point chirality: mixture or P-helix, M-helix. Chem Commun (Camb) 2014; 51:592-5. [PMID: 25415266 DOI: 10.1039/c4cc08362h] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The self-assembly of lanthanide (europium or lanthanium) bimetallic triple helicates from two closely related chiral ligands resulted in a very different supramolecular phenomenon. One gave rise to significantly diastereoselective formation of a triple helicate, whereas the other led to diastereoselective breaking to generate a mixture of P and M diastereomers in ∼1 : 1.1 ratio. The first X-ray crystal structure of a chiral ligand based lanthanide triple-helicate indicates that successive CH-π interactions were found to maintain the supramolecular helical structure.
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Affiliation(s)
- Chi-Tung Yeung
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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19
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Albrecht M, Isaak E, Shigemitsu H, Moha V, Raabe G, Fröhlich R. Terpenols as substituents for the diastereoselective formation of enantiomerically pure triple lithium-bridged helicate type-coordination compounds. Dalton Trans 2014; 43:14636-43. [DOI: 10.1039/c4dt01553c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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20
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Castilla AM, Ramsay WJ, Nitschke JR. Stereochemistry in subcomponent self-assembly. Acc Chem Res 2014; 47:2063-73. [PMID: 24793652 DOI: 10.1021/ar5000924] [Citation(s) in RCA: 327] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
CONSPECTUS: As Pasteur noted more than 150 years ago, asymmetry exists in matter at all organization levels. Biopolymers such as proteins or DNA adopt one-handed conformations, as a result of the chirality of their constituent building blocks. Even at the level of elementary particles, asymmetry exists due to parity violation in the weak nuclear force. While the origin of homochirality in living systems remains obscure, as does the possibility of its connection with broken symmetries at larger or smaller length scales, its centrality to biomolecular structure is clear: the single-handed forms of bio(macro)molecules interlock in ways that depend upon their handednesses. Dynamic artificial systems, such as helical polymers and other supramolecular structures, have provided a means to study the mechanisms of transmission and amplification of stereochemical information, which are key processes to understand in the context of the origins and functions of biological homochirality. Control over stereochemical information transfer in self-assembled systems will also be crucial for the development of new applications in chiral recognition and separation, asymmetric catalysis, and molecular devices. In this Account, we explore different aspects of stereochemistry encountered during the use of subcomponent self-assembly, whereby complex structures are prepared through the simultaneous formation of dynamic coordinative (N → metal) and covalent (N═C) bonds. This technique provides a useful method to study stereochemical information transfer processes within metal-organic assemblies, which may contain different combinations of fixed (carbon) and labile (metal) stereocenters. We start by discussing how simple subcomponents with fixed stereogenic centers can be incorporated in the organic ligands of mononuclear coordination complexes and communicate stereochemical information to the metal center, resulting in diastereomeric enrichment. Enantiopure subcomponents were then incorporated in self-assembly reactions to control the stereochemistry of increasingly complex architectures. This strategy has also allowed exploration of the degree to which stereochemical information is propagated through tetrahedral frameworks cooperatively, leading to the observation of stereochemical coupling across more than 2 nm between metal stereocenters and the enantioselective synthesis of a face-capped tetrahedron containing no carbon stereocenters via a stereochemical memory effect. Several studies on the communication of stereochemistry between the configurationally flexible metal centers in tetrahedral metal-organic cages have shed light on the factors governing this process, allowing the synthesis of an asymmetric cage, obtained in racemic form, in which all symmetry elements have been broken. Finally, we discuss how stereochemical diversity leads to structural complexity in the structures prepared through subcomponent self-assembly. Initial use of octahedral metal templates with facial stereochemistry in subcomponent self-assembly, which predictably gave rise to structures of tetrahedral symmetry, was extended to meridional metal centers. These lower-symmetry linkages have allowed the assembly of a series of increasingly intricate 3D architectures of varying functionality. The knowledge gained from investigating different aspects of the stereochemistry of metal-templated assemblies thus not only leads to new means of structural control but also opens pathways toward functions such as stereoselective guest binding and transformation.
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Affiliation(s)
- Ana M. Castilla
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| | - William J. Ramsay
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| | - Jonathan R. Nitschke
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
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21
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Sairenji S, Akine S, Nabeshima T. Dynamic Helicity Control of a Single-helical Oligooxime Complex and Acid–Base-triggered Repeated Helicity Inversion Mediated by Amino Acids. CHEM LETT 2014. [DOI: 10.1246/cl.140263] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Shiho Sairenji
- Faculty of Pure and Applied Sciences, University of Tsukuba
| | - Shigehisa Akine
- Graduate School of Natural Science and Technology, Kanazawa University
| | - Tatsuya Nabeshima
- Faculty of Pure and Applied Sciences, University of Tsukuba
- Tsukuba Research Center for Interdisciplinary Materials Science, University of Tsukuba
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22
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Albrecht M, Isaak E, Moha V, Raabe G, Fröhlich R. Stereocontrol in dinuclear triple lithium-bridged titanium(IV) complexes: solving some stereochemical mysteries. Chemistry 2014; 20:6650-8. [PMID: 24782405 DOI: 10.1002/chem.201402370] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Indexed: 11/07/2022]
Abstract
Compounds 1 a-f-H2 form "monomeric" triscatecholate titanium(IV) complexes [Ti(1 a-f)3](2-), which in the presence of Li cations are in equilibrium with the triple lithium-bridged "dimers" [Li3(Ti(1 a-f)3)2](-). The equilibrium strongly depends on the donor ability of the solvent. Usually, in solvents with high donor ability, the stereochemically labile monomer is preferred, whereas in nondonor solvents, the dimer is the major species. In the latter, the stereochemistry at the complex units is "locked". The configuration at the titanium(IV) triscatecholates is influenced by addition of chiral ammonium countercations. In this case, the induced stereochemical information at the monomer is transferred to the dimer. Alternatively, the configuration at the metal complexes can be controlled by enantiomerically pure ester side chains. Due to the different orientation of the ester groups in the monomer or dimer, opposite configurations of the triscatecholates were observed by circular dichroism (CD) spectroscopy for [Ti(1 c-e)3](2-) or [Li3(Ti(1 c-e)3)2](-). A surprising exception was found for the dimer [Li3(Ti(1 f)3)2](-). Herein, the dimer is the dominating species in weak donor (methanol), as well as strong donor (DMSO), solvents. This is due to the bulkiness of the ester substituent destabilizing the monomer. Due to the size of the substituent in [Li3(Ti(1 f)3)2](-) the esters have to adopt an unusual conformation in the dimer resulting in a stereocontrol of the small methyl group. Following this, opposite stereocontrol mechanisms were observed for the central metal-complex units of [Li3(Ti(1 c-e)3)2](-) or [Li3(Ti(1 f)3)2](-).
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Affiliation(s)
- Markus Albrecht
- Institut für Organische Chemie, RWTH Aachen, Landoltweg 1, 52074 Aachen (Germany).
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23
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Lu W, Du G, Liu K, Jiang L, Ling J, Shen Z. Chiroptical Inversion Induced by Rotation of a Carbon–Carbon Single Bond: An Experimental and Theoretical Study. J Phys Chem A 2013; 118:283-92. [DOI: 10.1021/jp410370q] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Wei Lu
- MOE Key
Laboratory of Macromolecular Synthesis and Functionalization, Department
of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ganhong Du
- MOE Key
Laboratory of Macromolecular Synthesis and Functionalization, Department
of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Keyuan Liu
- MOE Key
Laboratory of Macromolecular Synthesis and Functionalization, Department
of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Liming Jiang
- MOE Key
Laboratory of Macromolecular Synthesis and Functionalization, Department
of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jun Ling
- MOE Key
Laboratory of Macromolecular Synthesis and Functionalization, Department
of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhiquan Shen
- MOE Key
Laboratory of Macromolecular Synthesis and Functionalization, Department
of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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24
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Gerus A, Slepokura K, Lisowski J. Anion and solvent induced chirality inversion in macrocyclic lanthanide complexes. Inorg Chem 2013; 52:12450-60. [PMID: 24147755 DOI: 10.1021/ic401437r] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A series of the lanthanide(III) or yttrium(III) complexes of the type [LnL(NO3)(H2O)2](NO3)2, [LnL(NO3)(H2O)](NO3)2, [LnL(H2O)2](NO3)3, and [LnLCl(H2O)2]Cl2 where L is an all-R or all-S enantiomer (L(R) or L(S)) of the chiral hexaaza macrocycle, 2(R),7(R),18(R),23(R)- or 2(S),7(S),18(S),23(S)-1,8,15,17,24,31-hexaazatricyclo[25.3.1.1.0.0]-dotriaconta-10,12,14,26,28,30-hexaene, and Ln(III) = Sm(III), Tb(III), Ho(III), Er(III), Tm(III), Yb(III), Lu(III), or Y(III), have been synthesized and structurally characterized. The crystal structure of the free macrocycle shows a highly twisted molecule, preorganized for the formation of helical complexes. The crystal structures of the lanthanide(III) complexes show two different diastereomeric forms of the macrocycle with different configurations at the stereogenic amine nitrogen atoms: (RRRR) or (RSRS) (denoted as L(RI) and L(RII), respectively). The L(RI) diastereomeric form of the nitrate derivatives [LnL(NO3)(H2O)](NO3)2 (Ln = Ho, Er) and [LnL(H2O)2](NO3)3 (Ln = Tm, Yb, Lu) convert slowly to the L(RII) form in methanol or acetonitrile solutions, while this process is not observed for the L(RI) diastereomers of analogous chloride derivatives [LnL(H2O)2]Cl3 (Ln = Tm, Yb, Lu). On the other hand, the L(RI) → L(RII) conversion for these Tm(III), Yb(III), and Lu(III) chloride derivatives can be triggered by the addition of external nitrate anions. The circular dichroism (CD) and (1)H NMR data indicate initial fast exchange of axial chloride for axial nitrate ligand, followed by slow chirality inversion of the equatorial macrocyclic ligand.
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Affiliation(s)
- Aleksandra Gerus
- Department of Chemistry, University of Wrocław , 14 F. Joliot-Curie, 50-383 Wrocław, Poland
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25
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Akine S, Sairenji S, Taniguchi T, Nabeshima T. Stepwise Helicity Inversions by Multisequential Metal Exchange. J Am Chem Soc 2013; 135:12948-51. [DOI: 10.1021/ja405979v] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Shigehisa Akine
- Faculty
of Pure and Applied Sciences and ‡Tsukuba Research Center for Interdisciplinary
Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Shiho Sairenji
- Faculty
of Pure and Applied Sciences and ‡Tsukuba Research Center for Interdisciplinary
Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Takanori Taniguchi
- Faculty
of Pure and Applied Sciences and ‡Tsukuba Research Center for Interdisciplinary
Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Tatsuya Nabeshima
- Faculty
of Pure and Applied Sciences and ‡Tsukuba Research Center for Interdisciplinary
Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
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26
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Nishikawa M, Takara Y, Hattori Y, Nomoto K, Kusamoto T, Kume S, Nishihara H. Structural modification on copper(I)-pyridylpyrimidine complexes for modulation of rotational dynamics, redox properties, and phototriggered isomerization. Inorg Chem 2013; 52:8962-70. [PMID: 23883176 DOI: 10.1021/ic4011295] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The redox properties of copper pyridylpyrimidine complexes, which undergo linkage isomerism based on pyrimidine ring rotation, were compared under different coordination environments. A newly synthesized compound, [Cu(Mepypm)(L(Mes))]BF4 (1·BF4, Mepypm = 4-methyl-2-(2'-pyridyl)pyrimidine, L(Mes) = 2,9-dimesityl-1,10-phenanthroline) was compared with previously reported complexes of [Cu(MepmMepy)(L(Mes))]BF4 (2·BF4, MepmMepy = 4-methyl-2-(6'-methyl-2'-pyridyl)pyrimidine), Cu(Mepypm)(DPEphos)]BF4 (3·BF4, DPEphos = bis[2-(diphenylphosphino)phenyl]ether), [Cu(Mepypm)(L(Anth))]BF4 (4·BF4, L(Anth) = 2,9-bis(9-anthryl)-1,10-phenanthroline), and [Cu(Mepypm)(L(Macro))]BF4 (5·BF4). Isomer ratios, isomerization dynamics, redox properties, and photoelectron conversion functions varied with the coordination structure. Methyl substituents on the 6-position of the pyridine moiety increased steric repulsion and contributed to quicker rotation, enhanced photoluminescence, and increased photodriven rotational isomerization.
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Affiliation(s)
- Michihiro Nishikawa
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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27
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Nishikawa M, Kume S, Nishihara H. Stimuli-responsive pyrimidine ring rotation in copper complexes for switching their physical properties. Phys Chem Chem Phys 2013; 15:10549-65. [DOI: 10.1039/c3cp44710c] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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28
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Nishikawa M, Nomoto K, Kume S, Nishihara H. Solvated-Ion-Pairing-Sensitive Molecular Bistability Based on Copper(I)-Coordinated Pyrimidine Ring Rotation. Inorg Chem 2012; 52:369-80. [DOI: 10.1021/ic302141z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michihiro Nishikawa
- Department of Chemistry, School
of Science, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kuniharu Nomoto
- Department of Chemistry, School
of Science, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shoko Kume
- Department of Chemistry, School
of Science, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School
of Science, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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29
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Chiroptical switches: applications in sensing and catalysis. Molecules 2012; 17:1247-77. [PMID: 22293845 PMCID: PMC6268225 DOI: 10.3390/molecules17021247] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 01/18/2012] [Accepted: 01/20/2012] [Indexed: 12/03/2022] Open
Abstract
Chiroptical switches have found application in the detection of a multitude of different analytes with a high level of sensitivity and in asymmetric catalysis to offer switchable stereoselectivity. A wide range of scaffolds have been employed that respond to metals, small molecules, anions and other analytes. Not only have chiroptical systems been used to detect the presence of analytes, but also other properties such as oxidation state and other physical phenomena that influence helicity and conformation of molecules and materials. Moreover, the tunable responses of many such chiroptical switches enable them to be used in the controlled production of either enantiomer or diastereomer at will in many important organic reactions from a single chiral catalyst through selective use of a low-cost inducer: Co-catalysts (guests), metal ions, counter ions or anions, redox agents or electrochemical potential, solvents, mechanical forces, temperature or electromagnetic radiation.
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30
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Cantekin S, Nakano Y, Everts JC, van der Schoot P, Meijer EW, Palmans ARA. A stereoselectively deuterated supramolecular motif to probe the role of solvent during self-assembly processes. Chem Commun (Camb) 2012; 48:3803-5. [PMID: 22278322 DOI: 10.1039/c2cc17284d] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Small changes in the alkane solvent structure in combination with temperature effects lead to four different conformations of stereoselectively deuterated benzene-1,3,5-tricarboxamides in the aggregated state, affecting the expression of the supramolecular chirality and highlighting the role of the solvent structure in self-assembly processes.
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Affiliation(s)
- Seda Cantekin
- Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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31
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Ousaka N, Takeyama Y, Yashima E. Dinuclear metal complexes composed of peptide chains: Solvent-induced switching and inversion of the metal-centered chirality. Chem Sci 2012. [DOI: 10.1039/c1sc00693b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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32
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Nakano Y, Hirose T, Stals PJM, Meijer EW, Palmans ARA. Conformational analysis of supramolecular polymerization processes of disc-like molecules. Chem Sci 2012. [DOI: 10.1039/c1sc00547b] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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33
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Miyake H, Ueda M, Murota S, Sugimoto H, Tsukube H. Helicity inversion from left- to right-handed square planar Pd(ii) complexes: synthesis of a diastereomer pair from a single chiral ligand and their structure dynamism. Chem Commun (Camb) 2012; 48:3721-3. [DOI: 10.1039/c2cc18154a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Lin R, Zhang H, Li S, Chen L, Zhang W, Wen TB, Zhang H, Xia H. pH-Switchable Inversion of the Metal-Centered Chirality of Metallabenzenes: Opposite Stereodynamics in Reactions of Ruthenabenzene withL- andD-Cysteine. Chemistry 2011; 17:2420-7. [DOI: 10.1002/chem.201001867] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Revised: 09/25/2010] [Indexed: 11/10/2022]
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35
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Canary JW, Mortezaei S, Liang J. Transition metal-based chiroptical switches for nanoscale electronics and sensors. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2010.03.004] [Citation(s) in RCA: 117] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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36
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Jiang X, Lim YK, Zhang BJ, Opsitnick EA, Baik MH, Lee D. Dendritic molecular switch: chiral folding and helicity inversion. J Am Chem Soc 2009; 130:16812-22. [PMID: 19554697 DOI: 10.1021/ja806723e] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Appropriately designed chemical architectures can fold to adopt well-defined secondary structures without the need for structural motifs of biological origin. We have designed tris(N-salicylideneaniline)-based hyperbranched molecules that spontaneously collapse to compact three-blade propeller geometry of either (P)- or (M)-handedness. For a homologous series of compounds, a direct correlation was established between the absolute screw sense, either (P)- or (M)-, of this helical folding and the absolute configuration, either (R)- or (S)-, of the chiral alcohol groups introducing local asymmetric bias to the conformationally restricted molecular backbone. 1H NMR and CD spectroscopic studies provided significant insights into structural folding and unfolding of these chiral molecules in solution, which proceed via reversible assembly and disassembly of the C3-symmetric hydrogen-bonding network. Notably, solvents profoundly influenced this dynamic process. A strong correlation between the solvent donor number (DN) or solvent basicity (SB) parameters and the change in the Cotton effects pointed toward specific O-H...solvent interactions that drive structural unfolding and eventual refolding to apparently opposite helicity. This unusual chirality inversion process could also be induced by installation of chemical protecting groups that simulate specific solvent-solute interactions. Removal of this covalent mimic of the solvent shell restored the original screw sense of the parent molecule, thus establishing the feasibility of covalently triggered helicity inversion as a new mode of operation for chiroptical molecular switches.
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Affiliation(s)
- Xuan Jiang
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, USA
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37
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Crassous J. Chiral transfer in coordination complexes: towards molecular materials. Chem Soc Rev 2009; 38:830-45. [DOI: 10.1039/b806203j] [Citation(s) in RCA: 347] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Gregoliński J, Starynowicz P, Hua KT, Lunkley JL, Muller G, Lisowski J. Helical lanthanide(III) complexes with chiral nonaaza macrocycle. J Am Chem Soc 2008; 130:17761-73. [PMID: 19053412 PMCID: PMC2680476 DOI: 10.1021/ja805033j] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The chiral nonaazamacrocyclic amine L, which is a reduction product of the 3 + 3 Schiff base macrocycle, wraps around the lanthanide(III) ions to form enantiopure helical complexes. These Ce(III), Pr(III), Nd(III), Eu(III), Gd(III), Tb(III), Er(III), Yb(III) and Lu(III) complexes have been isolated in enantiopure form and have been characterized by spectroscopic methods. X-ray crystal structures of the Ln(III) complexes with L show that the thermodynamic product of the complexation of the RRRRRR-isomer of the macrocycle is the (M)-helical complex in the case of Ce(III), Pr(III), Nd(III) and Eu(III). In contrast, the (P)-helical complex is the thermodynamic product in the case of Yb(III) and Lu(III). The NMR and CD spectra show that the (M)-helicity for the kinetic complexation product of the RRRRRR-isomer of the macrocycle is preferred for all investigated lanthanide(III) ions, while the preferred helicity of the thermodynamic product is (M) for the early lanthanide(III) ions and (P) for the late lanthanide(III) ions. In the case of the late lanthanide(III) ions, a slow inversion of helicity between the kinetic (M)-helical product and the thermodynamic (P)-helical product is observed in solution. For Er(III), Yb(III) and Lu(III) both forms have been isolated in pure form and characterized by NMR and CD. The analysis of 2D NMR spectra of the Lu(III) complex reveals the NOE correlations that prove that the helical structure is retained in solution. The NMR spectra also reveal large isotopic effect on the 1H NMR shifts of paramagnetic Ln(III) complexes, related to NH/ND exchange. Photophysical measurements show that L(RRRRRR) appears to favor an efficient 3pipi*-to-Ln energy transfer process taking place for Eu(III) and Tb(III), but these Eu(III)- and Tb(III)-containing complexes with L(RRRRRR) lead to small luminescent quantum yields due to an incomplete intersystem crossing (isc) transfer, a weak efficiency of the luminescence sensitization by the ligand, and/or efficient nonradiative deactivation processes. Circularly polarized luminescence on the MeOH solutions of Eu(III) and Tb(III) complexes confirms the presence of stable chiral emitting species and the observation of almost perfect mirror-image CPL spectra for these compounds with both enantiomeric forms of L.
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Affiliation(s)
- Janusz Gregoliński
- Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland. Fax: 48 71 3282348; Tel: 48 71 3757252
| | - Przemysław Starynowicz
- Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland. Fax: 48 71 3282348; Tel: 48 71 3757252
| | - KimNgan T. Hua
- Department of Chemistry, San José State University, One Washington Square, San José, CA 95192-0101, USA. Fax: 408-924-4945, Tel: 408-924-4973
| | - Jamie L. Lunkley
- Department of Chemistry, San José State University, One Washington Square, San José, CA 95192-0101, USA. Fax: 408-924-4945, Tel: 408-924-4973
| | - Gilles Muller
- Department of Chemistry, San José State University, One Washington Square, San José, CA 95192-0101, USA. Fax: 408-924-4945, Tel: 408-924-4973
| | - Jerzy Lisowski
- Department of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland. Fax: 48 71 3282348; Tel: 48 71 3757252
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39
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Delsuc N, Hutin M, Campbell VE, Kauffmann B, Nitschke JR, Huc I. Metal-directed dynamic formation of tertiary structure in foldamer assemblies: orienting helices at an angle. Chemistry 2008; 14:7140-3. [PMID: 18604861 DOI: 10.1002/chem.200800988] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nicolas Delsuc
- Institut Européen de Chimie et Biologie, Université de Bordeaux-CNRS UMR5248 and UMS3033, 2 rue Robert Escarpit, Pessac, France
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40
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Miyake H, Hikita M, Itazaki M, Nakazawa H, Sugimoto H, Tsukube H. A Chemical Device That Exhibits Dual Mode Motions: Dynamic Coupling of Amide Coordination Isomerism and Metal-Centered Helicity Inversion in a Chiral Cobalt(II) Complex. Chemistry 2008; 14:5393-6. [DOI: 10.1002/chem.200800625] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Montgomery CP, New EJ, Parker D, Peacock RD. Enantioselective regulation of a metal complex in reversible binding to serum albumin: dynamic helicity inversion signalled by circularly polarised luminescence. Chem Commun (Camb) 2008:4261-3. [DOI: 10.1039/b810978h] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Miyake H, Kamon H, Miyahara I, Sugimoto H, Tsukube H. Time-Programmed Peptide Helix Inversion of a Synthetic Metal Complex Triggered by an Achiral NO3- Anion. J Am Chem Soc 2007; 130:792-3. [DOI: 10.1021/ja0768385] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hiroyuki Miyake
- Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hiroshi Kamon
- Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Ikuko Miyahara
- Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hideki Sugimoto
- Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hiroshi Tsukube
- Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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43
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Gregoliński J, Lisowski J. Helicity inversion in lanthanide(III) complexes with chiral nonaaza macrocyclic ligands. Angew Chem Int Ed Engl 2007; 45:6122-6. [PMID: 16921573 DOI: 10.1002/anie.200602464] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Janusz Gregoliński
- Department of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50 383 Wrocław, Poland
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44
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Yoshizawa A, Kobayashi K, Sato M. Host–guest effect on chirality transfer from a binaphthyl derivative to a host nematic liquid crystal. Chem Commun (Camb) 2007:257-9. [PMID: 17299631 DOI: 10.1039/b611538a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel dichiral compound possessing both an asymmetric axis and a chiral centre induces opposite twist senses and distinct helical pitches in different host nematic liquid crystals; the host-guest effect on chirality transfer is discussed in terms of molecular recognition.
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Affiliation(s)
- Atsushi Yoshizawa
- Department of Frontier Materials Chemistry, Faculty of Science and Technology, Hirosaki University, 3 Hirosaki, 036-8561, Japan.
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Hutin M, Bernardinelli G, Nitschke JR. Synthetic selectivity through avoidance of valence frustration. Proc Natl Acad Sci U S A 2006; 103:17655-60. [PMID: 17098865 PMCID: PMC1693802 DOI: 10.1073/pnas.0607786103] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
A series of di-copper(I) complexes has been prepared via the reaction of copper(I) tetrafluoroborate, 2,6-diformylpyridine, 8-aminoquinoline, and a series of aliphatic diamines and 4-substituted anilines. To avoid a "valence-frustrated" state, involving a mismatch between the number of ligand donor atoms and the number of metal acceptor sites, the product structures formed selectively: One of the formyl groups of the diformylpyridine reacted specifically with the aminoquinoline, whereas the other formyl group reacted with the diamine or aniline. The observed selectivity was demonstrated to be thermodynamic in nature: When two dicopper complexes that were stable yet "valence-frustrated" were mixed, an imine metathesis reaction was observed to occur spontaneously to generate a "valence-satisfied" structure. In addition to control over the constitution of the ligands, we were able to exercise control over their relative orientations within the complex. Diamines exclusively gave structures in which the ligand exhibited a head-to-head orientation along the copper-copper axis to avoid stretching. Anilines gave predominantly head-to-tail structures, with the proportion of head-to-head isomer decreasing in complexes that incorporate more electron-deficient anilines and disappearing in less polar solvents. We also demonstrated the removal of the metals and the hydrogenation of the imine bonds to generate a molecule containing nonexchanging secondary amines, suggesting potential uses of this technique in the domain of organic synthesis.
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Affiliation(s)
- Marie Hutin
- Department of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva 4, Switzerland; and
| | - Gérald Bernardinelli
- Laboratory of X-Ray Crystallography, University of Geneva, 24 Quai Ernest Ansermet, 1211 Geneva 4, Switzerland
| | - Jonathan R. Nitschke
- Department of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva 4, Switzerland; and
- To whom correspondence should be addressed. E-mail:
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Gregoliński J, Lisowski J. Helicity Inversion in Lanthanide(III) Complexes with Chiral Nonaaza Macrocyclic Ligands. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602464] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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