1
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Franke M, Klingsiek MJ, Buth J, Mix A, Lamm JH, Neumann B, Stammler HG, Mitzel NW. Tridentate Lewis Acids Based on Tribenzotriquinacene Chalices. Chemistry 2024; 30:e202401072. [PMID: 38742716 DOI: 10.1002/chem.202401072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 05/03/2024] [Accepted: 05/13/2024] [Indexed: 05/16/2024]
Abstract
Chalice-shaped tridentate poly-Lewis acids (PLA) based on the tribenzotriquinacene (TBTQ) scaffold have been synthesised. Stannylation of the alkyne units, attached via phenyl-spacers to the benzhydrylic positions to the TBTQ scaffold, with Me2NSnMe3 afforded the trimethyltin substituted TBTQ derivative. Replacement of these tin functions with other elements resulted in rigid boron- and aluminium-functionalised PLAs. More flexible PLAs were obtained by hydrometallation reactions of the terminal alkyne groups of 4b,8b,12b-tris((ethynyl)phenyl)tribenzotriquinacene. The resulting poly-Lewis acids were tested for their acceptor abilities in host-guest experiments with suitable bases. Preliminary tests with pyridine led to the synthesis of a large tridentate base with three pyridyl groups attached to a TBTQ backbone. Complexation of this Lewis base with the PLAs resulted in the formation of aggregates, which were studied in solution in more detail by 1H DOSY NMR experiments regarding their size. Further experiments were performed with the tridentate bases 1,4,7-trimethyl-1,4,7-triazacyclononane and tris((dimethylphosphino)methyl)phenylsilane.
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Affiliation(s)
- Maurice Franke
- Chair of Inorganic and Structural Chemistry, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld
| | - Maximilian J Klingsiek
- Chair of Inorganic and Structural Chemistry, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld
| | - Julian Buth
- Chair of Inorganic and Structural Chemistry, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld
| | - Andreas Mix
- Chair of Inorganic and Structural Chemistry, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld
| | - Jan-Hendrik Lamm
- Chair of Inorganic and Structural Chemistry, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld
| | - Beate Neumann
- Chair of Inorganic and Structural Chemistry, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld
| | - Hans-Georg Stammler
- Chair of Inorganic and Structural Chemistry, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld
| | - Norbert W Mitzel
- Chair of Inorganic and Structural Chemistry, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld
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2
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Karmakar P, Finnegan TJ, Rostam DC, Taneja S, Uçar S, Hansen AL, Moore CE, Hadad CM, Pratumyot K, Parquette JR, Badjić JD. Molecular bowls for inclusion complexation of toxic anticancer drug methotrexate. Chem Sci 2024; 15:10155-10163. [PMID: 38966368 PMCID: PMC11220613 DOI: 10.1039/d3sc05627a] [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: 10/22/2023] [Accepted: 05/13/2024] [Indexed: 07/06/2024] Open
Abstract
We describe the preparation and study of novel cavitands, molecular bowls 16+ and 26+, as good binders of the anticancer drug methotrexate (MTX). Molecular bowls are comprised of a curved tribenzotriquinacene (TBTQ) core conjugated to three macrocyclic pyridinium units at the top. The cavitands are easily accessible via two synthetic steps from hexabromo-tribenzotriquinacene in 25% yield. As amphiphilic molecules, bowls 16+ and 26+ self-associate in water by the nucleation-to-aggregation pathway (NMR). The bowls are preorganized, having a semi-rigid framework comprising a fixed bottom with a wobbling pyridinium rim (VT NMR and MD). Further studies, both experimental (NMR) and computational (DFT and MCMM), suggested that a folded MTX occupies the cavity of bowls wherein it forms π-π, C-H-π, and ion pairing intermolecular contacts but also undergoes desolvation to give stable binary complexes (μM) in water. Moreover, a computational protocol is introduced to identify docking pose(s) of MTX inside molecular bowls from NMR shielding data. Both molecular bowls have shown in vitro biocompatibility with liver and kidney cell lines (MTS assay). As bowl 26+ is the strongest binder of MTX reported to date, we envision it as an excellent candidate for further studies on the way toward developing an antidote capable of removing MTX from overdosed cancer patients.
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Affiliation(s)
- Pratik Karmakar
- Department of Chemistry and Biochemistry, The Ohio State University 100 West 18th Avenue Columbus Ohio 43210 USA
- Supramolecular Chemistry Research Unit, Department of Chemistry, Faculty of Science, King Mongkut's University of Technology Thonburi 126 Pracha Uthit Road, Bang Mod, Thung Khru Bangkok 10140 Thailand
| | - Tyler J Finnegan
- Department of Chemistry and Biochemistry, The Ohio State University 100 West 18th Avenue Columbus Ohio 43210 USA
| | - Darian C Rostam
- Department of Chemistry and Biochemistry, The Ohio State University 100 West 18th Avenue Columbus Ohio 43210 USA
| | - Sagarika Taneja
- Department of Chemistry and Biochemistry, The Ohio State University 100 West 18th Avenue Columbus Ohio 43210 USA
| | - Sefa Uçar
- Department of Chemistry and Biochemistry, The Ohio State University 100 West 18th Avenue Columbus Ohio 43210 USA
- Atatürk University, Faculty of Science, Department of Chemistry Erzurum 25240 Turkey
| | - Alexandar L Hansen
- Campus Chemical Instrumentation Center, The Ohio State University 100 West 18th Avenue Columbus Ohio 43210 USA
| | - Curtis E Moore
- Department of Chemistry and Biochemistry, The Ohio State University 100 West 18th Avenue Columbus Ohio 43210 USA
| | - Christopher M Hadad
- Department of Chemistry and Biochemistry, The Ohio State University 100 West 18th Avenue Columbus Ohio 43210 USA
| | - Kornkanya Pratumyot
- Supramolecular Chemistry Research Unit, Department of Chemistry, Faculty of Science, King Mongkut's University of Technology Thonburi 126 Pracha Uthit Road, Bang Mod, Thung Khru Bangkok 10140 Thailand
| | - Jon R Parquette
- Department of Chemistry and Biochemistry, The Ohio State University 100 West 18th Avenue Columbus Ohio 43210 USA
| | - Jovica D Badjić
- Department of Chemistry and Biochemistry, The Ohio State University 100 West 18th Avenue Columbus Ohio 43210 USA
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3
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Franke M, Klingsiek MJ, Buth J, Lamm JH, Neumann B, Stammler HG, Mitzel NW. Hexadentate poly-Lewis acids based on the bowl-shaped tribenzotriquinacene. Dalton Trans 2024; 53:7751-7762. [PMID: 38445707 DOI: 10.1039/d4dt00379a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
Hexadentate poly-Lewis acids (PLA) based on the bowl-shaped tribenzotriquinacene (TBTQ) have been synthesised. The introduction of three n-propyl groups into the benzhydrylic positions of the TBTQ backbone has significantly increased the solubility of the subsequently derived compounds. Semi-flexible PLAs containing boron and aluminium were obtained by hydrometallation of the corresponding 2,3,6,7,10,11-hexaalkynyl-TBTQ. Other rigid hexadentate PLAs were synthesised by stannylation of the corresponding alkyne units with Me3SnNMe2 followed by tin-element exchange reactions. The Lewis acidity of these PLAs was investigated in host-guest experiments with pyridine. Further experiments with bidentate bases showed correlations between their flexibility, their Lewis basicity and the complexation behaviour towards the synthesised PLAs. Addition of bis((dimethylphosphino)methyl)dimethylsilane (BisPhos) to solutions of the rigid alkynyl PLAs led to the formation of 3 : 1 adducts. Single crystal X-ray diffraction was used to further elucidate the host-guest connectivtiy. In addition, a sixfold pnictogen-bonding donor was synthesised by tin-antimony exchange.
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Affiliation(s)
- Maurice Franke
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2), Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Maximilian J Klingsiek
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2), Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Julian Buth
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2), Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Jan-Hendrik Lamm
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2), Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Beate Neumann
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2), Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Hans-Georg Stammler
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2), Universitätsstr. 25, D-33615 Bielefeld, Germany.
| | - Norbert W Mitzel
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2), Universitätsstr. 25, D-33615 Bielefeld, Germany.
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4
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Yang N, Zhu YY, Lin WX, Lu YL, Xu WR. pH-Responsive fluorescent supramolecular nanoparticles based on tetraphenylethylene-labelled chitosan and a six-fold carboxylated tribenzotriquinacene. Beilstein J Org Chem 2023; 19:635-645. [PMID: 37205131 PMCID: PMC10186267 DOI: 10.3762/bjoc.19.45] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 04/26/2023] [Indexed: 05/21/2023] Open
Abstract
We synthesized a new tetraphenylethylene-modified chitosan bioconjugate, CS-TPE, that shows the aggregation-induced emission effect. It can self-assemble into fluorescent polymeric nanoparticles in an aqueous solution at pH 5.3 either alone or with the water-soluble bowl-shaped six-fold carboxylated tribenzotriquinacene derivative TBTQ-C6 via host-guest binding. The spherical nanoparticles formed by CS-TPE amphiphiles or TBTQ-C6/CS-TPE supra-amphiphiles disintegrated under alkaline stimulation at pH 10.4 and the dispersion of the aggregates after the collapse in the presence of TBTQ-C6 was greatly improved. In addition, the fluorescence of CS-TPE was significantly enhanced by introducing TBTQ-C6, and remained relatively stable with variations in pH for both CS-TPE and TBTQ-C6/CS-TPE. Such pH-responsive supramolecular spherical nanoparticles with stable fluorescence emission based on CS-TPE or TBTQ-C6/CS-TPE may find applications in various fields, including the development of visual oral drug delivery systems.
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Affiliation(s)
- Nan Yang
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry, School of Chemical Engineering and Technology, School of Science, Hainan University, Haikou 570228, PR China
| | - Yi-Yan Zhu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry, School of Chemical Engineering and Technology, School of Science, Hainan University, Haikou 570228, PR China
| | - Wei-Xiu Lin
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry, School of Chemical Engineering and Technology, School of Science, Hainan University, Haikou 570228, PR China
| | - Yi-Long Lu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry, School of Chemical Engineering and Technology, School of Science, Hainan University, Haikou 570228, PR China
| | - Wen-Rong Xu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry, School of Chemical Engineering and Technology, School of Science, Hainan University, Haikou 570228, PR China
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5
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Hung TY, Kuck D, Chow HF. Donor-Acceptor Tribenzotriquinacene-Based Molecular Wizard Hats Bearing Three ortho-Benzoquinone Units. Chemistry 2022; 29:e202203749. [PMID: 36585931 DOI: 10.1002/chem.202203749] [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: 11/30/2022] [Revised: 12/29/2022] [Accepted: 12/29/2022] [Indexed: 01/01/2023]
Abstract
Two π-extended bay-bridged tribenzotriquinacenes ("TBTQ wizard hats") 12 and 16 bearing three mutually conjugated, alternating veratrole-type and ortho-benzoquinone units were synthesized. The electronic properties of these complementarily arranged, nonplanar push-pull systems are affected by the fusion with the rigid, C3 -symmetric TBTQ core to a different extent, as revealed by X-ray structural analysis, UV-vis spectroscopy and cyclovoltammetry. The combination of three quinone units within the original TBTQ core and three veratrole-type bay bridging units in 12 gives rise to a more efficiently π-conjugated chromophore, as reflected by the shallower shape of wizard hat and its absorption in the visible up to 750 nm in comparison to 16. Congener 12 contains an aromatic 18-π electron system in contrast to the cross-conjugated analog 16. X-ray structure analysis of the precursor dodecaether 15 revealed the formation of a cage-like supramolecular dimer, in which the peripheral dioxane-type ether groups interlace by twelve noncovalent C-H⋅⋅⋅⋅⋅O bonds.
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Affiliation(s)
- Tsz-Yu Hung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Dietmar Kuck
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Hak-Fun Chow
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong
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6
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Li MP, Yang N, Xu WR. Synthesis of a new water-soluble hexacarboxylated tribenzotriquinacene derivative and its competitive host–guest interaction for drug delivery. Beilstein J Org Chem 2022; 18:539-548. [PMID: 35615534 PMCID: PMC9112186 DOI: 10.3762/bjoc.18.56] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 05/02/2022] [Indexed: 11/23/2022] Open
Abstract
A new water-soluble hexacarboxylated tribenzotriquinacene derivative (TBTQ-CB6) was synthesized and used as a supramolecular drug carrier to load the model anticancer drugs dimethyl viologen (MV) and doxorubicin (DOX) via host–guest interactions. The drugs could be effectively released by spermine (SM), a molecule overexpressed in cancer cells, through host–guest competitive substitution since TBTQ-CB6 has a stronger binding affinity toward SM than MV and DOX. The host–guest interactions of the complexes of TBTQ-CB6 with MV, DOX and SM were investigated by NMR spectroscopy and fluorescence spectroscopy. The association stoichiometry of the complexes of TBTQ-CB6 with MV, DOX, and SM was found to be 1:1 with association constants of Ka = (7.67 ± 0.34) × 104 M−1, Ka = (6.81 ± 0.33) × 104 M−1, and Ka = (5.09 ± 0.98) × 105 M−1, respectively. The competitive substitution process was visualized by NMR titration. This novel TBTQ-based host–guest drug delivery system may have potential use in supramolecular chemotherapy.
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Affiliation(s)
- Man-Ping Li
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Department of Chemistry, School of Science or School of Chemical Engineering and Technology, Hainan University, Haikou, 570228, China
| | - Nan Yang
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Department of Chemistry, School of Science or School of Chemical Engineering and Technology, Hainan University, Haikou, 570228, China
| | - Wen-Rong Xu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Department of Chemistry, School of Science or School of Chemical Engineering and Technology, Hainan University, Haikou, 570228, China
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7
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Seifert M, Barth D, Kuck D. Benzoannellated Fenestranes Bearing
para
‐Terphenyl Units. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Monika Seifert
- Department of Chemistry Bielefeld University 33615 Bielefeld Germany
| | - Dieter Barth
- Department of Chemistry Bielefeld University 33615 Bielefeld Germany
| | - Dietmar Kuck
- Department of Chemistry Bielefeld University 33615 Bielefeld Germany
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8
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Wei Y, Liu P. Analysis of the nature of interaction between AlN nanocage and ibuprofen using quantum chemical study. Struct Chem 2021. [DOI: 10.1007/s11224-021-01750-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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9
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Rios C, Molina B, Salcedo R. Capture of Fullerenes in Cages and Rings by Forming Metal-π Bond Arene Interactions. MATERIALS 2021; 14:ma14123424. [PMID: 34205520 PMCID: PMC8234524 DOI: 10.3390/ma14123424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/04/2021] [Accepted: 06/11/2021] [Indexed: 12/02/2022]
Abstract
Nowadays, the task of the selectively capture of fullerene molecules from soot is the subject of several studies. The low solubility of fullerenes represents a drawback when the goal is to purify them and to carry out chemical procedures where they participate. There are different molecules that can act as a kind of cocoon, giving shelter to the fullerene cages in such a way that they can be included in a solution or can be extracted from a mix. In this work, a theoretical study of some known and new proposed organic molecules of this kind is presented. In all cases, the interaction occurs with the help of a metallic atom or ion which plays the role of a bridge, providing a place for a metallocene like interaction to occur. The thermodynamic arguments favoring the formation of this adduct species are addressed as well as the nature of the bond by means QTAIM parameters and frontier molecular orbitals analysis.
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Affiliation(s)
- Citlalli Rios
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, Coyoacán, México City 04510, Mexico;
| | - Bertha Molina
- Facultad de Ciencias, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, Coyoacán, México City 04510, Mexico;
| | - Roberto Salcedo
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, Coyoacán, México City 04510, Mexico;
- Correspondence:
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10
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Wang X, Li M, Xu W, Kuck D. Photo and pH Dual‐Responsive Supramolecular Vesicles Based on a Water‐Soluble Tribenzotriquinacene and an Azobenzene‐Containing Amphiphile in Water. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202000683] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Xin‐Rui Wang
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry Department of Chemistry, School of Science Hainan University Haikou 570228 P. R. China
| | - Man‐Ping Li
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry Department of Chemistry, School of Science Hainan University Haikou 570228 P. R. China
| | - Wen‐Rong Xu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry Department of Chemistry, School of Science Hainan University Haikou 570228 P. R. China
| | - Dietmar Kuck
- Department of Chemistry and Center for Molecular Materials (CM2) Bielefeld University Bielefeld 33615 Germany
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11
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Liu SY, Wang XR, Li MP, Xu WR, Kuck D. Water-soluble host-guest complexes between fullerenes and a sugar-functionalized tribenzotriquinacene assembling to microspheres. Beilstein J Org Chem 2020; 16:2551-2561. [PMID: 33133287 PMCID: PMC7590625 DOI: 10.3762/bjoc.16.207] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 09/22/2020] [Indexed: 12/14/2022] Open
Abstract
A sugar-functionalized water-soluble tribenzotriquinacene derivative bearing six glucose residues, TBTQ-(OG) 6 , was synthesized and its interaction with C60 and C70-fullerene in co-organic solvents and aqueous solution was investigated by fluorescence spectroscopy and ultraviolet-visible spectroscopy. The association stoichiometry of the complexes TBTQ-(OG) 6 with C60 and TBTQ-(OG) 6 with C70 was found to be 1:1 with binding constants of K a = (1.50 ± 0.10) × 105 M-1 and K a = (2.20 ± 0.16) × 105 M-1, respectively. The binding affinity between TBTQ-(OG) 6 and C60 was further verified by Raman spectroscopy. The geometry of the complex of TBTQ-(OG) 6 with C60 deduced from DFT calculations indicates that the driving force of the complexation is mainly due to the hydrophobic effect and to host-guest π-π interactions. Hydrophobic surface simulations showed that TBTQ-(OG) 6 and C60 forms an amphiphilic supramolecular host-guest complex, which further assembles to microspheres with diameters of 0.3-3.5 μm, as determined by scanning electron microscopy.
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Affiliation(s)
- Si-Yuan Liu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry, Department of Chemistry, School of Science, Hainan University, Haikou, 570228, China
| | - Xin-Rui Wang
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry, Department of Chemistry, School of Science, Hainan University, Haikou, 570228, China
| | - Man-Ping Li
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry, Department of Chemistry, School of Science, Hainan University, Haikou, 570228, China
| | - Wen-Rong Xu
- Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Hainan Provincial Key Laboratory of Fine Chemistry, Department of Chemistry, School of Science, Hainan University, Haikou, 570228, China
| | - Dietmar Kuck
- Department of Chemistry, Center for Molecular Materials (CM2), Bielefeld University, 33615 Bielefeld, Germany
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12
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Liu YZ, Zhang JB, Yuan K. Theoretical Prediction on a Novel Reduction-Responsive Nanoring Having a Disulfide Group for Facile Encapsulation and Release of Fullerenes C 60 and C 70. ACS OMEGA 2020; 5:25400-25407. [PMID: 33043220 PMCID: PMC7542849 DOI: 10.1021/acsomega.0c03788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
In this work, a novel reduction-responsive disulfide bond-containing cycloparaphenylene nanoring molecule (DSCPP) with a pyriform shape has been designed. In addition, the interactions between the designed nanoring (host) and fullerenes C60 and C70 (guests) were investigated theoretically at the M06-2X/6-31G(d,p) and M06-L/MIDI! levels of theory. By analyzing geometric characteristics and host-guest binding energies, it is revealed that the designed DSCPP is an ideal host molecule of guests C60 and C70. DSCPP presents excellent elastic deformation during the encapsulation of C60 and C70. The high binding energies suggest that both DSCPP⊃C60 and DSCPP⊃C70 (∼92 and 118 kJ·mol-1 at the M06-2X/6-31G(d,p) level of theory) are stable host-guest complexes, and the guest C70 is more strongly encapsulated than C60 in the gas phase. The thermodynamic information indicates that the formation of the two host-guest complexes is thermodynamically spontaneous. In addition, the frontier molecular orbital (FMO) features and intermolecular weak interaction region between DSCPP and fullerenes gusts are discussed to further understand the structures and properties of the DSCPP⊃fullerene systems. Finally, the ring-opening mechanism of the DSCPP under reduction conditions is investigated.
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Affiliation(s)
- Yan-Zhi Liu
- School
of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741001, China
- Key
Laboratory for New Molecule Materials Design and Function of Gansu
Universities, Tianshui Normal University, Tianshui 741001, China
| | - Jian-Bin Zhang
- School
of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741001, China
| | - Kun Yuan
- School
of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741001, China
- Key
Laboratory for New Molecule Materials Design and Function of Gansu
Universities, Tianshui Normal University, Tianshui 741001, China
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13
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Leonhardt V, Fimmel S, Krause AM, Beuerle F. A covalent organic cage compound acting as a supramolecular shadow mask for the regioselective functionalization of C 60. Chem Sci 2020; 11:8409-8415. [PMID: 34123100 PMCID: PMC8163405 DOI: 10.1039/d0sc03131c] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A trigonal-bipyramidal covalent organic cage compound serves as an efficient host to form stable 1 : 1-complexes with C60 and C70. Fullerene encapsulation has been comprehensively studied by NMR and UV/Vis spectroscopy, mass spectrometry as well as single-crystal X-ray diffraction. Exohedral functionalization of encapsulated C60via threefold Prato reaction revealed high selectivity for the symmetry-matched all-trans-3 addition pattern. The taming of the Prato reaction: a covalent organic cage compound serves as a supramolecular template for the regioselective functionalization of C60.![]()
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Affiliation(s)
- Viktoria Leonhardt
- Universität Würzburg, Institut für Organische Chemie Am Hubland 97074 Würzburg Germany .,Universität Würzburg, Center for Nanosystems Chemistry (CNC), Bavarian Polymer Institute (BPI) Theodor-Boveri-Weg 97074 Würzburg Germany
| | - Stefanie Fimmel
- Universität Würzburg, Center for Nanosystems Chemistry (CNC), Bavarian Polymer Institute (BPI) Theodor-Boveri-Weg 97074 Würzburg Germany
| | - Ana-Maria Krause
- Universität Würzburg, Institut für Organische Chemie Am Hubland 97074 Würzburg Germany .,Universität Würzburg, Center for Nanosystems Chemistry (CNC), Bavarian Polymer Institute (BPI) Theodor-Boveri-Weg 97074 Würzburg Germany
| | - Florian Beuerle
- Universität Würzburg, Institut für Organische Chemie Am Hubland 97074 Würzburg Germany .,Universität Würzburg, Center for Nanosystems Chemistry (CNC), Bavarian Polymer Institute (BPI) Theodor-Boveri-Weg 97074 Würzburg Germany
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14
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Wagner P, Rominger F, Mastalerz M. Switching the Statistical C
3
/C
1
Ratio in the Threefold Aromatic Substitution of Tribenzotriquinacenes towards the C
3
Isomer. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806332] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Philippe Wagner
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Frank Rominger
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Michael Mastalerz
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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15
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Wagner P, Rominger F, Mastalerz M. Switching the Statistical C 3 /C 1 Ratio in the Threefold Aromatic Substitution of Tribenzotriquinacenes towards the C 3 Isomer. Angew Chem Int Ed Engl 2018; 57:11321-11324. [PMID: 29938890 DOI: 10.1002/anie.201806332] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Indexed: 12/21/2022]
Abstract
Tribenzotriquinacene (TBTQ) is a bowl-shaped molecule that has been widely used as a molecular building block in supramolecular and materials chemistry. Especially C3 -symmetric threefold-substituted TBTQs are interesting for these purposes. Until now a general and selective synthetic approach to those C3 -symmetric products was lacking, mainly because the typically used electrophilic aromatic substitution reactions of the parent TBTQ hydrocarbons produce predominantly the C1 isomer over the C3 isomer (3:1 statistical ratio). Herein we introduce a threefold borylation of TBTQ with the C3 isomer as the main product (2.6:1 C3 /C1 ratio). The borylated TBTQ can be converted in good yields into other C3 -symmetric TBTQs, thus allowing straightforward synthetic access to new building blocks for supramolecular and materials chemistry.
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Affiliation(s)
- Philippe Wagner
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Michael Mastalerz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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16
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Rommelmann P, Greschner W, Ihrig S, Neumann B, Stammler HG, Gröger H, Kuck D. Combining Stereoselective Enzyme Catalysis with Chirality-Assisted Synthesis in Tribenzotriquinacene Chemistry. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800465] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Philipp Rommelmann
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
| | - Wilko Greschner
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
| | - Sarah Ihrig
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
| | - Beate Neumann
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
| | - Hans-Georg Stammler
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
| | - Harald Gröger
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
- Center for Molecular Materials (CM₂); Bielefeld University; Universitätsstr. 25 33615 Bielefeld Germany
| | - Dietmar Kuck
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
- Center for Molecular Materials (CM₂); Bielefeld University; Universitätsstr. 25 33615 Bielefeld Germany
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17
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Linke J, Neumann B, Stammler HG, Kuck D. Dodecabromo- and Dodecaiodocentrohexaindane: Td-Symmetrical Key Building Blocks for Twelve-Fold Cross-Coupling Reactions and Six-Fold Orthogonal Extension. Chemistry 2018; 24:9316-9324. [DOI: 10.1002/chem.201801806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Indexed: 01/02/2023]
Affiliation(s)
- Jens Linke
- Department of Chemistry and Center for Molecular Materials (CM 2 ); Bielefeld University; 33615 Bielefeld Germany
| | - Beate Neumann
- Department of Chemistry and Center for Molecular Materials (CM 2 ); Bielefeld University; 33615 Bielefeld Germany
| | - Hans-Georg Stammler
- Department of Chemistry and Center for Molecular Materials (CM 2 ); Bielefeld University; 33615 Bielefeld Germany
| | - Dietmar Kuck
- Department of Chemistry and Center for Molecular Materials (CM 2 ); Bielefeld University; 33615 Bielefeld Germany
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18
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Li ZM, Li YW, Cao XP, Chow HF, Kuck D. Biconcave and Convex-Concave Tribenzotriquinacene Dimers. J Org Chem 2018; 83:3433-3440. [PMID: 29554430 DOI: 10.1021/acs.joc.8b00375] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A new chiral tribenzotriquinacene bearing an ortho-bromoaniline nucleus was synthesized and optically resolved. The individual enantiomers, the absolute configuration of which was confirmed by single-crystal X-ray structure analysis, were stereoselectively converted into the same pyrazine-fused syn-bis-TBTQ derivative by chirality-assisted Buchwald-Hartwig amination. The corresponding diastereomeric anti-dimer was obtained alongside the syn-dimer from the racemic sample under similar reaction conditions. X-ray structure analysis of the dimers confirmed the mutual biconcave and convex-concave configuration of their TBTQ moieties and the preservation of the orthogonal orientation of the indane wings within each of them.
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Affiliation(s)
- Zhi-Min Li
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , P.R. China
| | - Ya-Wei Li
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , P.R. China
| | - Xiao-Ping Cao
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , P.R. China
| | - Hak-Fun Chow
- Department of Chemistry and Center of Novel Functional Molecules , The Chinese University of Hong Kong , Shatin , Hong Kong SAR
| | - Dietmar Kuck
- Department of Chemistry and Center for Molecular Materials (CM2) , Bielefeld University , 33615 Bielefeld , Germany
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19
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Rommelmann P, Nachtigall B, Guntelmann T, Gröger H, Kuck D. Stereoselective synthesis of enantiomerically pure bowl-shaped hydroxytribenzotriquinacenes. Org Biomol Chem 2018; 16:5635-5642. [DOI: 10.1039/c8ob01425f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bowl-shaped (M)-2-hydroxytribenzotriquinacene was obtained in enantiomerically pure form by stereoselective enzyme-catalysed ester hydrolysis of the racemic TBTQ-based aryl acetate.
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Affiliation(s)
| | - Beate Nachtigall
- Department of Chemistry
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - Tim Guntelmann
- Department of Chemistry
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - Harald Gröger
- Department of Chemistry
- Bielefeld University
- 33615 Bielefeld
- Germany
- Center for Molecular Materials (CM2)
| | - Dietmar Kuck
- Department of Chemistry
- Bielefeld University
- 33615 Bielefeld
- Germany
- Center for Molecular Materials (CM2)
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20
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Tomaschautzky J, Neumann B, Stammler HG, Mitzel NW. Poly-Lewis-acids based on bowl-shaped tribenzotriquinacene. Dalton Trans 2017; 46:1112-1123. [PMID: 28045169 DOI: 10.1039/c6dt04350j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tribenzotriquinacene is a versatile bowl-shaped hydrocarbon and a useful building block for the synthesis of poly-Lewis-acids. First derivatives bearing Lewis-acidic groups are reported.
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Affiliation(s)
- Janek Tomaschautzky
- Inorganic and Structural chemistry
- Centre for Molecular Materials CM2
- Fakultät für Chemie
- Universität Bielefeld
- 33615 Bielefeld
| | - Beate Neumann
- Inorganic and Structural chemistry
- Centre for Molecular Materials CM2
- Fakultät für Chemie
- Universität Bielefeld
- 33615 Bielefeld
| | - Hans-Georg Stammler
- Inorganic and Structural chemistry
- Centre for Molecular Materials CM2
- Fakultät für Chemie
- Universität Bielefeld
- 33615 Bielefeld
| | - Norbert W. Mitzel
- Inorganic and Structural chemistry
- Centre for Molecular Materials CM2
- Fakultät für Chemie
- Universität Bielefeld
- 33615 Bielefeld
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21
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Beaudoin D, Rominger F, Mastalerz M. Synthesis and Chiral Resolution ofC3-Symmetric Tribenzotriquinacenes. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600890] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Daniel Beaudoin
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; 69120 Heidelberg Germany
| | - Frank Rominger
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; 69120 Heidelberg Germany
| | - Michael Mastalerz
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; 69120 Heidelberg Germany
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22
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Dhara A, Weinmann J, Krause AM, Beuerle F. Apical Functionalization of Tribenzotriquinacenes. Chemistry 2016; 22:12473-8. [DOI: 10.1002/chem.201602622] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Ayan Dhara
- Universität Würzburg; Institut für Organische Chemie & Center for Nanosystems Chemistry (CNC); Am Hubland 97074 Würzburg Germany
| | - Joshua Weinmann
- Universität Würzburg; Institut für Organische Chemie & Center for Nanosystems Chemistry (CNC); Am Hubland 97074 Würzburg Germany
| | - Ana-Maria Krause
- Universität Würzburg; Institut für Organische Chemie & Center for Nanosystems Chemistry (CNC); Am Hubland 97074 Würzburg Germany
| | - Florian Beuerle
- Universität Würzburg; Institut für Organische Chemie & Center for Nanosystems Chemistry (CNC); Am Hubland 97074 Würzburg Germany
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23
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Lucchesini F, Grasse M, Neumann B, Stammler HG, Tellenbröker J, Kuck D. Merging Tribenzotriquinacene and Triptycene. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Francesco Lucchesini
- Department of Pharmacy; Università degli Studi di Genova; Viale Cembrano 4 16147 Genova Italy
| | - Michael Grasse
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
| | - Beate Neumann
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
| | - Hans-Georg Stammler
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
| | - Jörg Tellenbröker
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
| | - Dietmar Kuck
- Department of Chemistry; Bielefeld University; Universitätsstraße 25 33615 Bielefeld Germany
- Center for Molecular Materials (CM; Universitätsstraße 25 33615 Bielefeld Germany
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24
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Kuck D, Linke J, Teichmann LC, Barth D, Tellenbröker J, Gestmann D, Neumann B, Stammler HG, Bögge H. Centrohexaindane: six benzene rings mutually fixed in three dimensions - solid-state structure and six-fold nitration. Phys Chem Chem Phys 2016; 18:11722-37. [PMID: 26728545 DOI: 10.1039/c5cp07005h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The solid-state molecular structure of centrohexaindane (), a unique hydrocarbon comprising six benzene rings clamped to each other in three dimensions around a neopentane core, and the molecular packing in crystals of ·CHCl3 are reported. The molecular Td-symmetry and the Cartesian orientation of the six indane wings of in the solid state have been confirmed. The course and limitation of electrophilic aromatic substitution of are demonstrated for the case of nitration. Based on nitration experiments of a lower congener of , tribenzotriquinacene , the six-fold nitrofunctionalisation of has been achieved in excellent yield, giving four constitutional isomers, two nonsymmetrical ( and ) and two C3-symmetrical ones ( and ), all of which contain one single nitro group in each of the six benzene rings. The relative yields of the four isomers (∼3 : 1 : 1 : 3) point to a random electrophilic attack of the electrophiles at the twelve formally equivalent outer positions of the aromatic periphery of , suggesting electronic independence of its six aromatic π-electron systems. In turn, the pronounced conformational rigidity of the centrohexacyclic framework of enables the unequivocal structural identification of the isomeric hexanitrocentrohexaindanes by (1)H NMR spectroscopy.
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Affiliation(s)
- Dietmar Kuck
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany. and Center for Molecular Materials (CM2), Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Jens Linke
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
| | - Lisa Christin Teichmann
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
| | - Dieter Barth
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
| | - Jörg Tellenbröker
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
| | - Detlef Gestmann
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
| | - Beate Neumann
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
| | - Hans-Georg Stammler
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
| | - Hartmut Bögge
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
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25
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Zhang YF, Tian WF, Cao XP, Kuck D, Chow HF. o-Quinones Derived from Tribenzotriquinacenes: Functionalization of Inner Bay Positions and Use for Single-Wing Extensions. J Org Chem 2016; 81:2308-19. [DOI: 10.1021/acs.joc.5b02806] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yu-Fei Zhang
- State
Key Laboratory of Applied Organic Chemistry and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Wan-Fa Tian
- State
Key Laboratory of Applied Organic Chemistry and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Xiao-Ping Cao
- State
Key Laboratory of Applied Organic Chemistry and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Dietmar Kuck
- Department
of Chemistry and Center for Molecular Materials (CM2), Bielefeld University, 33615 Bielefeld, Germany
| | - Hak-Fun Chow
- Department
of Chemistry, State Key Laboratory of Synthetic Chemistry and The
Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, Hong Kong
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26
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Greschner W, Neumann B, Stammler HG, Gröger H, Kuck D. Enantiomerically Pure Tribenzotriquinacenes through Stereoselective Synthesis. Angew Chem Int Ed Engl 2015; 54:13764-8. [DOI: 10.1002/anie.201506906] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Indexed: 12/27/2022]
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27
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Greschner W, Neumann B, Stammler HG, Gröger H, Kuck D. Enantiomerenreine Tribenzotriquinacene durch stereoselektive Synthese. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506906] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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28
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Mughal EU, Neumann B, Stammler HG, Li ZM, Wei J, Kuck D, Cao X. Tribenzotriquinacene-Based Triscyclophanes: Intra- and Inter-WingC3v-Symmetrical Extension of the Bowl-Shaped Tribenzotriquinacene Core. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500219] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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29
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Henne S, Bredenkötter B, Alaghemandi M, Bureekaew S, Schmid R, Volkmer D. Almost enclosed buckyball joints: synthesis, complex formation, and computational simulations of pentypticene-extended tribenzotriquinacene. Chemphyschem 2014; 15:3855-63. [PMID: 25234364 DOI: 10.1002/cphc.201402475] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Indexed: 11/06/2022]
Abstract
We report the synthesis of a tribenzotriquinacene-based (TBTQ) receptor (3) for C60 fullerene, which is extended by pentiptycene moieties to provide an almost enclosed concave ball bearing. The system serves as a model for a self-assembling molecular rotor with a flexible and adapting stator. Unexpectedly, nuclear magnetic resonance spectroscopic investigations reveal a surprisingly low complex stability constant of K1 =213±37 M(-1) for [C60 ⊂3], seemingly inconsistent with the previously reported TBTQ systems. Molecular dynamics (MD) simulations have been conducted for three different [C60 ⊂TBTQ] complexes to resolve this. Because of the dominating dispersive interactions, the binding energies increase with the contact area between guest and host, however, only for rigid host structures. By means of free-energy calculations with an explicit solvent model it can be shown that the novel flexible TBTQ receptor 3 binds weakly because of hampering entropic contributions.
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Affiliation(s)
- Stefan Henne
- Institute of Physics, Chair of Solid State and Materials Chemistry, Augsburg University, Universitätsstrasse 1, 86159 Augsburg (Germany), -augsburg
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30
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Mughal EU, Neumann B, Stammler HG, Kuck D. Tribenzotriquinacenes that Bear Three Peripheral Pentaphenylphenyl Residues: Steric Crowding at a Bowl-Shaped Core. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402995] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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31
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Bredenkötter B, Grzywa M, Alaghemandi M, Schmid R, Herrebout W, Bultinck P, Volkmer D. Tribenzotriquinacene Receptors for C60 Fullerene Rotors: TowardsC3Symmetrical Chiral Stators for Unidirectionally Operating Nanoratchets. Chemistry 2014; 20:9100-10. [DOI: 10.1002/chem.201304980] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 05/12/2014] [Indexed: 11/06/2022]
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32
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Klett J. Monometalated tribenzotriquinacene: exo and endo coordination of sodium and potassium with a rigid bowl-shaped hydrocarbon anion. Chem Commun (Camb) 2014; 50:7929-32. [DOI: 10.1039/c4cc01428f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Monometalated tribenzotriquinacene forms an exo coordinated arrangement with sodium, while potassium is found in an endo position inside the bowl.
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Affiliation(s)
- Jan Klett
- Institut für Anorganische Chemie
- Georg-August-Universität Göttingen
- 37077 Göttingen, Germany
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33
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Klotzbach S, Scherpf T, Beuerle F. Dynamic covalent assembly of tribenzotriquinacenes into molecular cubes. Chem Commun (Camb) 2014; 50:12454-7. [DOI: 10.1039/c4cc01794c] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Molecular cubes constructed from catechol-functionalized tribenzotriquinacenes and 1,4-phenylene diboronic acids were synthesized in a one-pot procedure by crosslinking 20 individual components through a dynamic covalent approach.
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Affiliation(s)
- Stefanie Klotzbach
- Universität Würzburg
- Institut für Organische Chemie & Center for Nanosystems Chemistry (CNC)
- Am Hubland
- 97074 Würzburg, Germany
| | - Thorsten Scherpf
- Universität Würzburg
- Institut für Organische Chemie & Center for Nanosystems Chemistry (CNC)
- Am Hubland
- 97074 Würzburg, Germany
| | - Florian Beuerle
- Universität Würzburg
- Institut für Organische Chemie & Center for Nanosystems Chemistry (CNC)
- Am Hubland
- 97074 Würzburg, Germany
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34
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Mughal EU, Eberhard J, Kuck D. Tris(tetraceno)triquinacenes: Synthesis and Photophysical Properties of Threefold Linearly Extended Tribenzotriquinacenes. Chemistry 2013; 19:16029-35. [DOI: 10.1002/chem.201303031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Indexed: 11/08/2022]
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35
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Schmitz G, Helmich B, Hättig C. A scaling PNO–MP2 method using a hybrid OSV–PNO approach with an iterative direct generation of OSVs†. Mol Phys 2013. [DOI: 10.1080/00268976.2013.794314] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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36
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Brandenburg JG, Grimme S, Jones PG, Markopoulos G, Hopf H, Cyranski MK, Kuck D. Unidirectional Molecular Stacking of Tribenzotriquinacenes in the Solid State: A Combined X-ray and Theoretical Study. Chemistry 2013; 19:9930-8. [DOI: 10.1002/chem.201300761] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Indexed: 11/08/2022]
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