1
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Fukunaga TM, Onaka Y, Kato T, Ikemoto K, Isobe H. Stoichiometry validation of supramolecular complexes with a hydrocarbon cage host by van 't Hoff analyses. Nat Commun 2023; 14:8246. [PMID: 38129419 PMCID: PMC10739680 DOI: 10.1038/s41467-023-43979-5] [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: 07/22/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023] Open
Abstract
Defining chemical processes with equations is the first important step in characterizing equilibria for the assembly of supramolecular complexes, and the stoichiometry of the assembled components must be defined to generate the equation. Recently, this subject has attracted renewed interest, and statistical and/or information-theoretic measures were introduced to examine the validities of the equilibrium models used during curve fitting analyses of titration. The present study shows that these measures may not always be appropriate for credibility examinations and that further reformation of the protocols used to determine the overall stoichiometry is necessary. Hydrocarbon cage hosts and their chloroform complexes formed via weak CH-π hydrogen bonds were studied, which allowed us to introduce van 't Hoff analyses for effective validation of the stoichiometries of supramolecular complexes. This study shows that the stoichiometries of supramolecular complexes should be carefully examined by adopting multiple measures with different origins.
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Affiliation(s)
- Toshiya M Fukunaga
- Department of Chemistry, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yuzuka Onaka
- Department of Chemistry, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Takahide Kato
- Department of Chemistry, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Koki Ikemoto
- Department of Chemistry, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033, Japan.
| | - Hiroyuki Isobe
- Department of Chemistry, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033, Japan.
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2
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Haberhauer G, Gleiter R. The Nature of Strong Chalcogen Bonds Involving Chalcogen-Containing Heterocycles. Angew Chem Int Ed Engl 2020; 59:21236-21243. [PMID: 32776609 PMCID: PMC7693109 DOI: 10.1002/anie.202010309] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Indexed: 12/21/2022]
Abstract
Chalcogen bonds are σ hole interactions and have been used in recent years as an alternative to hydrogen bonds. In general, the electrostatic potential at the chalcogen atom and orbital delocalization effects are made responsible for the orientation of the chalcogen bond. Here, we were able to show by means of SAPT calculations that neither the induction (orbital delocalization effects) nor the electrostatic term is causing the spatial orientation of strong chalcogen bonds in tellurium-containing aromatics. Instead, steric interactions (Pauli repulsion) are responsible for the orientation. Against chemical intuition the dispersion energies of the examined tellurium-containing aromatics are far less important for the net attractive forces compared to the energies in the corresponding sulfur and selenium compounds. Our results underline the importance of often overlooked steric interactions (Pauli repulsion) in conformational control of σ hole interactions.
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Affiliation(s)
- Gebhard Haberhauer
- Institut für Organische ChemieUniversität Duisburg-EssenUniversitätsstr. 745117EssenGermany
| | - Rolf Gleiter
- Organisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
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3
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Die Natur starker Chalkogenbindungen unter Beteiligung chalkogenhaltiger Heterocyclen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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Mehrparvar S, Wölper C, Gleiter R, Haberhauer G. The Carbonyl⋅⋅⋅Tellurazole Chalcogen Bond as a Molecular Recognition Unit: From Model Studies to Supramolecular Organic Frameworks. Angew Chem Int Ed Engl 2020; 59:17154-17161. [PMID: 32533583 PMCID: PMC7540342 DOI: 10.1002/anie.202005374] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Indexed: 02/06/2023]
Abstract
In the last years, chalcogen bonding, the noncovalent interaction involving chalcogen centers, has emerged as interesting alternative to the ubiquitous hydrogen bonding in many research areas. Here, we could show by means of high-level quantum chemical calculations that the carbonyl⋅⋅⋅tellurazole chalcogen bond is at least as strong as conventional hydrogen bonds. Using the carbonyl⋅⋅⋅tellurazole binding motif, we were able to design complex supramolecular networks in solid phase starting from tellurazole-substituted cyclic peptides. X-ray analyses reveal that the rigid structure of the cyclic peptides is caused by hydrogen bonds, whereas the supramolecular network is held together by chalcogen bonding. The type of the supramolecular network depends on peptide used; both linear wires and a honeycomb-like supramolecular organic framework (SOF) were observed. The unique structure of the SOF shows two channels filled with different types of solvent mixtures that are either locked or freely movable.
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Affiliation(s)
- Saber Mehrparvar
- Institut für Organische ChemieUniversität Duisburg-EssenUniversitätsstraße 745117EssenGermany
| | - Christoph Wölper
- Institut für Organische ChemieUniversität Duisburg-EssenUniversitätsstraße 745117EssenGermany
| | - Rolf Gleiter
- Organisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Gebhard Haberhauer
- Institut für Organische ChemieUniversität Duisburg-EssenUniversitätsstraße 745117EssenGermany
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5
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Mehrparvar S, Wölper C, Gleiter R, Haberhauer G. Die Carbonyl⋅⋅⋅Tellurazol‐Chalkogenbindung als molekulare Erkennungseinheit: Von Modellstudien zu supramolekularen organischen Gerüstverbindungen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005374] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Saber Mehrparvar
- Institut für Organische Chemie Universität Duisburg-Essen Universitätsstraße 7 D-45117 Essen Deutschland
| | - Christoph Wölper
- Institut für Organische Chemie Universität Duisburg-Essen Universitätsstraße 7 D-45117 Essen Deutschland
| | - Rolf Gleiter
- Organisch-Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 D-69120 Heidelberg Deutschland
| | - Gebhard Haberhauer
- Institut für Organische Chemie Universität Duisburg-Essen Universitätsstraße 7 D-45117 Essen Deutschland
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6
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Gleiter R, Haberhauer G, Rominger F. A New Look on Larger Sulfur and Selenium Rings – Dispersion Forces and Shapes of Larger Cycles. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900744] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rolf Gleiter
- Organisch‐Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie Universität Duisburg‐Essen Universitätsstr. 7 45117 Essen Germany
| | - Frank Rominger
- Organisch‐Chemisches Institut Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
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7
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Mehrparvar S, Adam A, Haberhauer G. Switchable Imidazole Platform - Synthesis and Structural Investigation. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800636] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Saber Mehrparvar
- Institut für Organische Chemie; Universität Duisburg-Essen; Universitätsstr. 7 45117 Essen Germany
| | - Abdulselam Adam
- Institut für Organische Chemie; Universität Duisburg-Essen; Universitätsstr. 7 45117 Essen Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie; Universität Duisburg-Essen; Universitätsstr. 7 45117 Essen Germany
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Mehranfar A, Izadyar M. Theoretical evaluation of symmetrical α,α′,δ,δ′-tetramethyl cucurbit[6]uril for haloalkane 1-(3-chlorophenyl)-4-(3-chloropropyl)-piperazinium and chloroform encapsulation. J INCL PHENOM MACRO 2018. [DOI: 10.1007/s10847-018-0820-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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Adam A, Mehrparvar S, Haberhauer G, Glüsenkamp KH, Wölper C. N-Aryl Imidazole Platforms - Synthesis and Structural Investigation. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Abdulselam Adam
- Institut für Organische Chemie; Universität Duisburg-Essen; Universitätsstr. 7 45117 Essen Germany
| | - Saber Mehrparvar
- Institut für Organische Chemie; Universität Duisburg-Essen; Universitätsstr. 7 45117 Essen Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie; Universität Duisburg-Essen; Universitätsstr. 7 45117 Essen Germany
| | | | - Christoph Wölper
- Institut für Organische Chemie; Universität Duisburg-Essen; Universitätsstr. 7 45117 Essen Germany
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Zhang Z, Sun L, Zhou G, Xie P, Ye J. Sepia ink oligopeptide induces apoptosis and growth inhibition in human lung cancer cells. Oncotarget 2017; 8:23202-23212. [PMID: 28423568 PMCID: PMC5410297 DOI: 10.18632/oncotarget.15539] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 02/12/2017] [Indexed: 11/25/2022] Open
Abstract
Sepia ink oligopeptide (SIO), as a tripeptide extracted from Sepia ink, could be used as an inducer of apoptosis in human prostate cancer cells. We designed a cyclo-mimetic peptide of SIO by introducing a disulfide bond to stabilize the native peptide into beta turn structure, and produced a peptide with higher cell permeability and stability. Through labeling an FITC to the N-terminus of the peptide, the cell permeability was examined. Stabilized peptide showed enhanced cellular uptake than linear tripeptide as indicated by flow cytometry and cell fluorescent imaging. The high intracellular delivery of stable SIO could more efficiently inhibit cell proliferation and induce apoptosis. Furthermore, the expression of the anti-apoptotic protein Bcl-2 was down-regulated, whereas pro-apoptotic proteins P53 and caspase-3 were up-regulated by stable SIO. In conclusion, our study is the first to use stable SIO to induce apoptosis in two lung cancer cells A549 and H1299.
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Affiliation(s)
- Zhi Zhang
- Department of Thoracic Surgery, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing 210000, Jiangsu, China
| | - Lei Sun
- Department of Medical Iconography, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing 210000, Jiangsu, China
| | - Guoren Zhou
- Department of Chemotherapy, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing 210000, Jiangsu, China
| | - Peng Xie
- Department of Radiotherapy, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing 210000, Jiangsu, China
| | - Jinjun Ye
- Department of Radiotherapy, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, Nanjing 210000, Jiangsu, China
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11
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Exploring host–guest complexation mechanisms by a molecular dynamics/quantum mechanics/continuum solvent model approach. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.02.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Alfonso I. From simplicity to complex systems with bioinspired pseudopeptides. Chem Commun (Camb) 2016; 52:239-50. [DOI: 10.1039/c5cc07596c] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
This feature article highlights some of the recent advances in creating complexity from simple pseudopeptidic molecules. The bioinspired approaches discussed here allowed an increase in the structural, chemical and interactional complexity (see figure).
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Affiliation(s)
- Ignacio Alfonso
- Department of Biological Chemistry and Molecular Modelling
- Institute of Advanced Chemistry of Catalonia
- IQAC-CSIC
- Jordi Girona
- 18-26
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13
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Haberhauer G, Woitschetzki S, Füten C. Encapsulated Guests in the Smallest Spaces: Shrinking Guests by Compression and Investigations under Solvent-Free Conditions. J Org Chem 2015. [DOI: 10.1021/acs.joc.5b01187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gebhard Haberhauer
- Institut für Organische
Chemie, Universität Duisburg-Essen, Universitätsstr. 7, D-45117 Essen, Germany
| | - Sascha Woitschetzki
- Institut für Organische
Chemie, Universität Duisburg-Essen, Universitätsstr. 7, D-45117 Essen, Germany
| | - Christof Füten
- Institut für Organische
Chemie, Universität Duisburg-Essen, Universitätsstr. 7, D-45117 Essen, Germany
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14
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Abstract
Dispersive interactions are known to play a major role in molecular associations in the gas phase and in the solid state. In solution, however, their significance has been disputed in recent years on the basis of several arguments. A major problem until now has been the separation of dispersive and hydrophobic effects, which are both maximized in water due the low polarizability of this most important medium. Analyses of complexes between porphyrins and systematically varied substrates in water have allowed us to discriminate dispersive from hydrophobic effects, as the latter turned out to be negligible for complexations with flat surfaces such as porphyrins. Also, for the first time, it has become possible to obtain binding free energy increments ΔΔG for a multitude of organic residues including halogen, amide, amino, ether, carbonyl, ester, nitro, sulfur, unsatured, and cyclopropane groups, which turned out to be additive. Binding contributions for saturated residues are unmeasurably small, with ΔΔG > 1 kJ/mol, but they increase to, e.g., ΔΔG = 5 kJ/mol for a nitro group, a value not far from, e.g., that of a stacking pyridine ring. Stacking interactions of heteroarenes with porphyrins depend essentially on the size of the arenes, in line with polarizabilities, and seem to be rather independent of the position of nitrogen within the rings. Measurements of halogen derivatives indicate that complexes with porphyrins, cyclodextrins, and pillarenes as hosts in different media consistently show increasing stability from fluorine to iodine as the substituent. This, and the observed sequence with other substrates, is in line with the expected increase in dispersive forces with increasing polarizability. Induced dipoles, which also would increase with polarizability, can be ruled out as providing the driving source in view of the data with halides: the observed stability sequence is opposite the change of electronegativity from fluorine to iodine. The same holds for the solvent effect observed in ethanol-water mixtures. Dispersive contributions vary not only with the polarizability of the used media but also with the interacting receptor sites; it has been shown that for cucurbiturils the polarizability inside the cavity is extremely low, which also explains why hydrophobic effects are maximized with these hosts. Complexations with other known host compounds, however, such as those between cryptands or cavitands with, e.g., noble gases, bear the signature of dominating dispersive forces. Some recent examples illustrate that such van der Waals forces can also play an important role in complexations with proteins. Again, a clue for this is the increase in ΔG for inhibitor binding by 7 kJ/mol for, e.g., a bromine in comparison to a fluorine derivative.
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Affiliation(s)
- Hans-Jörg Schneider
- FR Organische Chemie, Universität des Saarlandes, D-66041 Saarbrücken, Germany
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15
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Mohan M, Balaji C, Goud VV, Banerjee T. Thermodynamic Insights in the Separation of Cellulose/Hemicellulose Components from Lignocellulosic Biomass Using Ionic Liquids. J SOLUTION CHEM 2015. [DOI: 10.1007/s10953-015-0295-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Antony J, Sure R, Grimme S. Using dispersion-corrected density functional theory to understand supramolecular binding thermodynamics. Chem Commun (Camb) 2015; 51:1764-74. [DOI: 10.1039/c4cc06722c] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A recently published theoretical approach employing a nondynamic structure model using dispersion-corrected density functional theory (DFT-D3) to calculate equilibrium free energies of association (Chem. – Eur. J., 2012, 18, 9955–9964) is illustrated by its application to eight supramolecular complexes.
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Affiliation(s)
- Jens Antony
- Mulliken Center for Theoretical Chemistry
- Institut für Physikalische und Theoretische Chemie der Universität Bonn
- D-53115 Bonn
- Germany
| | - Rebecca Sure
- Mulliken Center for Theoretical Chemistry
- Institut für Physikalische und Theoretische Chemie der Universität Bonn
- D-53115 Bonn
- Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry
- Institut für Physikalische und Theoretische Chemie der Universität Bonn
- D-53115 Bonn
- Germany
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17
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Strongly underestimated dispersion energy in cryptophanes and their complexes. Nat Commun 2014; 5:3542. [DOI: 10.1038/ncomms4542] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 03/04/2014] [Indexed: 11/08/2022] Open
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