1
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Katoono R, Obara Y, Sakamoto K, Miyashita R. Study of optical rotation based on the molecular structure in fused oligomers of macrocycles. RSC Adv 2024; 14:20735-20742. [PMID: 38952942 PMCID: PMC11215750 DOI: 10.1039/d4ra03709j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Accepted: 06/16/2024] [Indexed: 07/03/2024] Open
Abstract
We designed a unique oligomer form in which several helically twisted macrocycles (M- or P-helicity) are arranged through fusion. We investigated the optical rotation of a series of fused oligomers of macrocycles with a difference in the number and arrangement of elements associated with point-chiral auxiliary. Some oligomers cooperatively attained a situation where an identical sense of twisting was preferred throughout the entire molecule. On the basis of these results, we estimated diastereomeric excess induced in each oligomer. We revealed that the molar optical rotation per element was modulated with a rotational angle between elements: an increase via 0° rotational arrangement, a decrease via 180° rotational arrangement, or a decrease via cyclic arrangement. Alternatively, for other oligomers in which several diastereomeric conformers coexist, we uniquely attempted to consider the optical rotation based on the molecular structure through the assessment of a change ratio of the absorption dissymmetry factor before and after complexation with an achiral guest. We found that molar optical rotation could be different based on the arrangement, although actual measured values were similar.
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Affiliation(s)
- Ryo Katoono
- Department of Chemistry, Faculty of Science, Hokkaido University Sapporo 060-0810 Japan +81 11 706-4616
| | - Yudai Obara
- Department of Chemistry, Faculty of Science, Hokkaido University Sapporo 060-0810 Japan +81 11 706-4616
| | - Kazuki Sakamoto
- Department of Chemistry, Faculty of Science, Hokkaido University Sapporo 060-0810 Japan +81 11 706-4616
| | - Rei Miyashita
- Department of Chemistry, Faculty of Science, Hokkaido University Sapporo 060-0810 Japan +81 11 706-4616
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2
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Katoono R, Kudo T, Kawai S. An attempt to consider cooperativity in helical-sense preferences induced in fused macrocycles. Org Biomol Chem 2023; 21:2562-2569. [PMID: 36880431 DOI: 10.1039/d3ob00171g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
We synthesized bis and tris(macrocycle)s in which a two- or three-fold macrocycle was fused and each adopted twisted forms with M- or P-helicity. According to the sense of twisting in each element, diverse conformations can be generated in a molecule. We present two types of conformational preferences. One is the innate preference for a helical form with an identical sense of twisting throughout the entire molecule. The other is the helical-sense preference for a particular sense of twisting. We were interested in the relationship between Kn and (K1)n, where Kn is an equilibrium constant for the conformational interconversion between two helical forms (MM and PP, MMM and PPP) and n is the number of elements, since we considered that the relationship could be a metric to see the interinfluence among these macrocyclic elements in a single molecule. Through VT measurements in 1H NMR and CD spectroscopy, we attempted to quantify the helical-sense preferences induced in the fused macrocycles (n = 2 and 3) to compare Kn and (K1)n.
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Affiliation(s)
- Ryo Katoono
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.
| | - Takaaki Kudo
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.
| | - Shunsuke Kawai
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.
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3
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Liu X, Liang X, Hu Y, Han L, Qu Q, Liu D, Guo J, Zeng Z, Bai H, Kwok RTK, Qin A, Lam JWY, Tang BZ. Catalyst-Free Spontaneous Polymerization with 100% Atom Economy: Facile Synthesis of Photoresponsive Polysulfonates with Multifunctionalities. JACS AU 2021; 1:344-353. [PMID: 34467298 PMCID: PMC8395608 DOI: 10.1021/jacsau.0c00100] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Indexed: 05/14/2023]
Abstract
Photoresponsive polymers have attracted extensive attention due to their tunable functionalities and advanced applications; thus, it is significant to develop facile in situ synthesis strategies, extend polymers family, and establish various applications for photoresponsive polymers. Herein, we develop a catalyst-free spontaneous polymerization of dihaloalkynes and disulfonic acids without photosensitive monomers for the in situ synthesis of photoresponsive polysulfonates at room temperature in air with 100% atom economy in high yields. The resulting polysulfonates could undergo visible photodegradation with strong photoacid generation, leading to various applications including dual-emissive or 3D photopatterning, and practical broad-spectrum antibacterial activity. The halogen-rich polysulfonates also exhibit a high and photoswitched refractive index and could undergo efficient postfunctionalizations to further expand the variety and functionality of photoresponsive heteroatom-containing polyesters.
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Affiliation(s)
- Xiaolin Liu
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, and Institute for
Advanced Study, The Hong Kong University
of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Xin Liang
- College
of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, 700 Changcheng Road, Qingdao, Shandong 266109 China
| | - Yubing Hu
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, and Institute for
Advanced Study, The Hong Kong University
of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Lei Han
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, and Institute for
Advanced Study, The Hong Kong University
of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
- College
of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, 700 Changcheng Road, Qingdao, Shandong 266109 China
| | - Qing Qu
- Nano
Science and Technology Program and William Mong Institute of Nano
Science and Technology, The Hong Kong University
of Science and Technology, Clear
Water Bay, Hong Kong China
| | - Dongming Liu
- Center
for Aggregation-Induced Emission, SCUT-HKUST Joint Research Institute,
State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Jing Guo
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Zebing Zeng
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Haotian Bai
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, and Institute for
Advanced Study, The Hong Kong University
of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Ryan T. K. Kwok
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, and Institute for
Advanced Study, The Hong Kong University
of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
- HKUST-Shenzhen
Research Institute, No.
9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
| | - Anjun Qin
- Center
for Aggregation-Induced Emission, SCUT-HKUST Joint Research Institute,
State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Jacky W. Y. Lam
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, and Institute for
Advanced Study, The Hong Kong University
of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
- HKUST-Shenzhen
Research Institute, No.
9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
| | - Ben Zhong Tang
- Department
of Chemistry, Hong Kong Branch of Chinese National Engineering Research
Center for Tissue Restoration and Reconstruction, and Institute for
Advanced Study, The Hong Kong University
of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
- HKUST-Shenzhen
Research Institute, No.
9 Yuexing first RD, South Area, Hi-tech Park, Nanshan, Shenzhen 518057, China
- Center
for Aggregation-Induced Emission, SCUT-HKUST Joint Research Institute,
State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
- AIE Institute, Guangzhou Development District, Huangpu, Guangzhou 510530, China
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4
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Caprice K, Pupier M, Bauzá A, Frontera A, Cougnon FBL. Synchronized On/Off Switching of Four Binding Sites for Water in a Molecular Solomon Link. Angew Chem Int Ed Engl 2019; 58:8053-8057. [DOI: 10.1002/anie.201902278] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Kenji Caprice
- Department of Organic Chemistry University of Geneva 30 Quai Ernest Ansermet Geneva Switzerland
| | - Marion Pupier
- Department of Organic Chemistry University of Geneva 30 Quai Ernest Ansermet Geneva Switzerland
| | - Antonio Bauzá
- Department de Química Universitat de les Illes Balears Carretera de Valldemossa km 7.5 07122 Palma de Mallorca Baleares Spain
| | - Antonio Frontera
- Department de Química Universitat de les Illes Balears Carretera de Valldemossa km 7.5 07122 Palma de Mallorca Baleares Spain
| | - Fabien B. L. Cougnon
- Department of Organic Chemistry University of Geneva 30 Quai Ernest Ansermet Geneva Switzerland
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5
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Caprice K, Pupier M, Bauzá A, Frontera A, Cougnon FBL. Synchronized On/Off Switching of Four Binding Sites for Water in a Molecular Solomon Link. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902278] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Kenji Caprice
- Department of Organic Chemistry University of Geneva 30 Quai Ernest Ansermet Geneva Switzerland
| | - Marion Pupier
- Department of Organic Chemistry University of Geneva 30 Quai Ernest Ansermet Geneva Switzerland
| | - Antonio Bauzá
- Department de Química Universitat de les Illes Balears Carretera de Valldemossa km 7.5 07122 Palma de Mallorca Baleares Spain
| | - Antonio Frontera
- Department de Química Universitat de les Illes Balears Carretera de Valldemossa km 7.5 07122 Palma de Mallorca Baleares Spain
| | - Fabien B. L. Cougnon
- Department of Organic Chemistry University of Geneva 30 Quai Ernest Ansermet Geneva Switzerland
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6
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Nagai A, Nakamura T, Nabeshima T. A twisted macrocyclic hexanuclear palladium complex with internal bulky coordinating ligands. Chem Commun (Camb) 2019; 55:2421-2424. [DOI: 10.1039/c8cc09643k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A macrocyclic hexanuclear palladium complex, which accumulates coordination sites on metals inside the cavity, was found to take a uniquely-twisted conformation when six molecules of a bulky pyridine derivative coordinated to the palladium.
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Affiliation(s)
- Akira Nagai
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS)
- University of Tsukuba
- Tsukuba
- Japan
| | - Takashi Nakamura
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS)
- University of Tsukuba
- Tsukuba
- Japan
| | - Tatsuya Nabeshima
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS)
- University of Tsukuba
- Tsukuba
- Japan
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7
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Saikawa M, Noda T, Matsuoka R, Nakamura T, Nabeshima T. Heterodinuclear Group 13 Element Complexes of N
4
O
6
‐Type Dipyrrin with an Unsymmetrical Twisted Structure. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801062] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Makoto Saikawa
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS) University of Tsukuba 1‐1‐1 Tennodai, Tsukuba 305‐8571 Ibaraki Japan
| | - Takumu Noda
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS) University of Tsukuba 1‐1‐1 Tennodai, Tsukuba 305‐8571 Ibaraki Japan
| | - Ryota Matsuoka
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS) University of Tsukuba 1‐1‐1 Tennodai, Tsukuba 305‐8571 Ibaraki Japan
| | - Takashi Nakamura
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS) University of Tsukuba 1‐1‐1 Tennodai, Tsukuba 305‐8571 Ibaraki Japan
| | - Tatsuya Nabeshima
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS) University of Tsukuba 1‐1‐1 Tennodai, Tsukuba 305‐8571 Ibaraki Japan
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8
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Saikawa M, Nakamura T, Uchida J, Yamamura M, Nabeshima T. Synthesis of figure-of-eight helical bisBODIPY macrocycles and their chiroptical properties. Chem Commun (Camb) 2018; 52:10727-30. [PMID: 27463784 DOI: 10.1039/c6cc05439k] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A macrocyclic bisBODIPY (bis(boron-dipyrromethene)) complex [1B2] with a figure-of-eight helicity was synthesized and successfully resolved. [1B2] was proven to be one of the most efficient red-emitting CPL (circularly polarized luminescence) fluorophores reported to date (λ = 663 nm, |glum| = 9 × 10(-3), ΦF = 0.58).
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Affiliation(s)
- Makoto Saikawa
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
| | - Takashi Nakamura
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
| | - Junji Uchida
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
| | - Masaki Yamamura
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
| | - Tatsuya Nabeshima
- Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
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9
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Katoono R, Kusaka K, Tanaka Y, Fujiwara K, Suzuki T. Supramolecular chiroptical switching of helical-sense preferences through the two-way intramolecular transmission of a single chiral source. Org Biomol Chem 2018; 16:1167-1171. [DOI: 10.1039/c7ob03057f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complexation-induced reversal of helical-sense preferences is demonstrated with a simple molecule with a pair of exciton-coupled chromophores.
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Affiliation(s)
- Ryo Katoono
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Keiichi Kusaka
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Yuki Tanaka
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Kenshu Fujiwara
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Takanori Suzuki
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo 060-0810
- Japan
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10
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Lu X, Lee S, Hong Y, Phan H, Gopalakrishna TY, Herng TS, Tanaka T, Sandoval-Salinas ME, Zeng W, Ding J, Casanova D, Osuka A, Kim D, Wu J. Fluorenyl Based Macrocyclic Polyradicaloids. J Am Chem Soc 2017; 139:13173-13183. [DOI: 10.1021/jacs.7b07335] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xuefeng Lu
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Sangsu Lee
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 03722, Korea
| | - Yongseok Hong
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 03722, Korea
| | - Hoa Phan
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | | | - Tun Seng Herng
- Department of Materials Science & Engineering, National University of Singapore, 119260 Singapore
| | - Takayuki Tanaka
- Department
of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - María Eugenia Sandoval-Salinas
- Departament
de Ciència de Materials i Química Física, Institut
de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Martí i Franquès 1-11, Barcelona 08028, Spain
- Kimika Fakultatea, Euskal Herriko Unibertsitatea & Donostia International Physics Center, Paseo Manuel de Lardizabal, 4, 20018 Donostia-San Sebastián, Euskadi, Spain
| | - Wangdong Zeng
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Jun Ding
- Department of Materials Science & Engineering, National University of Singapore, 119260 Singapore
| | - David Casanova
- Kimika Fakultatea, Euskal Herriko Unibertsitatea & Donostia International Physics Center, Paseo Manuel de Lardizabal, 4, 20018 Donostia-San Sebastián, Euskadi, Spain
- IKERBASQUE - Basque Foundation for Science, Bilbao 48013, Euskadi, Spain
| | - Atsuhiro Osuka
- Department
of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Dongho Kim
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 03722, Korea
| | - Jishan Wu
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
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11
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Bloch WM, Holstein JJ, Hiller W, Clever GH. Morphological Control of Heteroleptic cis- and trans-Pd 2 L 2 L' 2 Cages. Angew Chem Int Ed Engl 2017; 56:8285-8289. [PMID: 28544072 PMCID: PMC5499718 DOI: 10.1002/anie.201702573] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Indexed: 11/25/2022]
Abstract
Control over the integrative self-sorting of metallo-supramolecular assemblies opens up possibilities for introducing increased complexity and function into a single self-assembled architecture. Herein, the relationship between the geometry of three ligand components and morphology of three self-sorted heteroleptic [Pd2 L2 L'2 ]4+ cages is examined. Pd-mediated assembly of two bis-monodentate pyridyl ligands with native bite angles of 75° and 120° affords a cis-[Pd2 L2 L'2 ]4+ cage while the same reaction with two ligands with bite angles of 75° and 60° gives an unprecedented, self-penetrating structural motif; a trans-[Pd2 (anti-L)2 L'2 ]4+ heteroleptic cage with a "doubly bridged figure eight" topology. Each heteroleptic assembly can be formed by cage-to-cage conversion of the homoleptic precursors and morphological control of [Pd2 L2 L'2 ] cages is achieved by selective ligand displacement transformations in a system of three ligands and at least six possible cage products.
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Affiliation(s)
- Witold M. Bloch
- Fakultät für Chemie und Chemische BiologieTU DortmundOtto-Hahn-Strasse 644227DortmundGermany
| | - Julian J. Holstein
- Fakultät für Chemie und Chemische BiologieTU DortmundOtto-Hahn-Strasse 644227DortmundGermany
| | - Wolf Hiller
- Fakultät für Chemie und Chemische BiologieTU DortmundOtto-Hahn-Strasse 644227DortmundGermany
| | - Guido H. Clever
- Fakultät für Chemie und Chemische BiologieTU DortmundOtto-Hahn-Strasse 644227DortmundGermany
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12
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Bloch WM, Holstein JJ, Hiller W, Clever GH. Morphologische Kontrolle von heteroleptischen cis
- und trans
-Pd2
L2
L′2
-Käfigen. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702573] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Witold M. Bloch
- Fakultät für Chemie und Chemische Biologie; TU Dortmund; Otto-Hahn-Straße 6 44227 Dortmund Deutschland
| | - Julian J. Holstein
- Fakultät für Chemie und Chemische Biologie; TU Dortmund; Otto-Hahn-Straße 6 44227 Dortmund Deutschland
| | - Wolf Hiller
- Fakultät für Chemie und Chemische Biologie; TU Dortmund; Otto-Hahn-Straße 6 44227 Dortmund Deutschland
| | - Guido H. Clever
- Fakultät für Chemie und Chemische Biologie; TU Dortmund; Otto-Hahn-Straße 6 44227 Dortmund Deutschland
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13
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Shee NK, Datta D. Aromaticity of metal acetylacetonates and a Möbius chelate of a cadmium(II) complex of an N4 helical ligand. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.08.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Katoono R, Kawai S, Suzuki T. Dynamic helical cyclophanes with two quadruply-bridged planes arranged in an "obverse and/or reverse" relation. Chem Sci 2016; 7:3240-3247. [PMID: 29997816 PMCID: PMC6006470 DOI: 10.1039/c5sc04673d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 01/29/2016] [Indexed: 11/21/2022] Open
Abstract
We describe the design of two types of cyclophanes that generate dynamic helicity through the twisting of two planes in a clockwise or counterclockwise direction to give (M)- or (P)-helicity. We used a rectangular and anisotropic plane of 1,2,4,5-tetrakis(phenylethynyl)benzene (TPEB), since it can be stacked in pairs in two ways, in parallel or orthogonally, to be identified as distinct cyclophane molecules. We adopted a synthetic strategy for obtaining these two cyclophanes as a mixture using a macrocyclic intermediate that possessed two rotatable phenyl rings. We introduced necessary parts into the rotators to give a mixture of rotational isomers leading to a parallel or orthogonal arrangement of TPEBs, and then doubly bridged two planes of TPEB to form quadruply-bridged cyclophanes. We consider that such two planes in each cyclophane are in an "obverse and/or reverse" relation. In each cyclophane, we found unique dynamic helical forms with (M)- or (P)-helicity as well as an inherently non-chiral form. Normally, the screw-sense preference of dynamic helicity would be controlled through the intramolecular or supramolecular transmission of central chirality, when a chiral auxiliary is attached to the cyclophanes or a chiral guest is allowed to form a complex with the cyclophanes. In a case where two different substitution groups were used on bridging units to generate planar chirality in each cyclophane, the screw-sense preference was controlled through the arrangement of these substitution groups, and did not depend on the transmission of central chirality. Two different substitution groups desymmetrize the enantiomeric forms with (M)- or (P)-helicity generated in each dynamic helical cyclophane so that two dynamic helical forms with (M)- or (P)-helicity can be in a diastereomeric relation. Thus, a particular screw sense of dynamic helicity can be preferred, regardless of whether or not the two substitution groups possess some chiral element.
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Affiliation(s)
- Ryo Katoono
- Department of Chemistry , Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan . ; ; Tel: +81 11 706 3396
| | - Shunsuke Kawai
- Department of Chemistry , Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan . ; ; Tel: +81 11 706 3396
| | - Takanori Suzuki
- Department of Chemistry , Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan . ; ; Tel: +81 11 706 3396
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15
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Katoono R, Kawai S, Fujiwara K, Suzuki T. Controllability of dynamic double helices: quantitative analysis of the inversion of a screw-sense preference upon complexation. Chem Sci 2015; 6:6592-6600. [PMID: 28757962 PMCID: PMC5506618 DOI: 10.1039/c5sc02614h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 08/07/2015] [Indexed: 11/21/2022] Open
Abstract
We describe a quantitative analysis of the complexation-induced inversion of a screw-sense preference based on a conformationally dynamic double-helix structure in a macrocycle. The macrocycle is composed of two twisting units (terephthalamide), which are spaced by two strands (1,3-bis(phenylethynyl)benzene), and is designed to generate a double-helix structure through twisting about a C2 axis in a conrotatory manner. The attachment of chiral auxiliaries to the twisting units induces a helical preference for a particular sense of (M)- or (P)-helicity through the intramolecular transmission of chirality to dynamic double helices. The twisting unit can also act as a binding site for capturing a guest molecule, and, in a complexed state, the preferred screw sense of the dynamic double-helix structure is reversed to exhibit the contrary preference. We quantitatively monitored the complexation-induced inversion of the screw-sense preference using 1H NMR spectroscopy, which enabled us to observe independently two species with (M)- or (P)-helicity in both the absence and presence of a guest molecule. Inversion of the screw-sense preference was induced upon complexation with an achiral guest as well as a chiral guest.
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Affiliation(s)
- Ryo Katoono
- Department of Chemistry , Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan . ; ; Tel: +81 11 706 3396
| | - Shunsuke Kawai
- Department of Chemistry , Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan . ; ; Tel: +81 11 706 3396
| | - Kenshu Fujiwara
- Department of Chemistry , Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan . ; ; Tel: +81 11 706 3396
| | - Takanori Suzuki
- Department of Chemistry , Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan . ; ; Tel: +81 11 706 3396
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