51
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Mboyi CD, Testa C, Reeb S, Genc S, Cattey H, Fleurat-Lessard P, Roger J, Hierso JC. Building Diversity in ortho-Substituted s-Aryltetrazines By Tuning N-Directed Palladium C–H Halogenation: Unsymmetrical Polyhalogenated and Biphenyl s-Aryltetrazines. ACS Catal 2017. [DOI: 10.1021/acscatal.7b03186] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Jean-Cyrille Hierso
- Institut Universitaire de France (IUF), 103 Boulevard Saint Michel, 75005 CEDEX Paris, France
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52
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Politzer P, Murray JS. σ-holes and π-holes: Similarities and differences. J Comput Chem 2017; 39:464-471. [PMID: 28877367 DOI: 10.1002/jcc.24891] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 05/28/2017] [Accepted: 06/17/2017] [Indexed: 12/26/2022]
Abstract
σ-Holes and π-holes are regions of molecules with electronic densities lower than their surroundings. There are often positive electrostatic potentials associated with them. Through these potentials, the molecule can interact attractively with negative sites, such as lone pairs, π electrons, and anions. Such noncovalent interactions, "σ-hole bonding" and "π-hole bonding," are increasingly recognized as being important in a number of different areas. In this article, we discuss and compare the natures and characteristics of σ-holes and π-holes, and factors that influence the strengths and locations of the resulting electrostatic potentials. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Peter Politzer
- Department of Chemistry, University of New Orleans, New Orleans, Louisiana, 70148
| | - Jane S Murray
- Department of Chemistry, University of New Orleans, New Orleans, Louisiana, 70148
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53
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Alexandropoulos DI, Dolinar BS, Vignesh KR, Dunbar KR. Putting a New Spin on Supramolecular Metallacycles: Co 3 Triangle and Co 4 Square Bearing Tetrazine-Based Radicals as Bridges. J Am Chem Soc 2017; 139:11040-11043. [PMID: 28728414 DOI: 10.1021/jacs.7b06925] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of two new radical-bridged compounds [Co3(bptz)3(dbm)3]·2toluene (1) and [Co4(bptz)4(dbm)4]·4MeCN (2) (bptz = 3,6-bis(pyridyl)-1,2,4,5-tetrazine; dbm = 1,3-diphenyl-1,3-propanedionate) is reported. The presence of the ligand-centered radical has been confirmed by X-ray crystallography and SQUID magnetometry. These complexes are the first metallacycles bearing nitrogen heterocyclic radicals as bridges. Magnetic studies reveal strong antiferromagnetic metal···radical coupling with coupling constants of J = -67.5 and -66.8 cm-1 for 1 and 2, respectively. DFT calculations further support the strong antiferromagnetic coupling between CoII ions and bptz radicals and confirm S = 3 and S = 4 spin ground states for 1 and 2, respectively.
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Affiliation(s)
| | - Brian S Dolinar
- Department of Chemistry, Texas A&M University , College Station, Texas 77842-3012, United States
| | - Kuduva R Vignesh
- Department of Chemistry, Texas A&M University , College Station, Texas 77842-3012, United States
| | - Kim R Dunbar
- Department of Chemistry, Texas A&M University , College Station, Texas 77842-3012, United States
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54
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Murray JS, Politzer P. Molecular electrostatic potentials and noncovalent interactions. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2017. [DOI: 10.1002/wcms.1326] [Citation(s) in RCA: 131] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Jane S. Murray
- Department of ChemistryUniversity of New OrleansNew OrleansLAUSA
| | - Peter Politzer
- Department of ChemistryUniversity of New OrleansNew OrleansLAUSA
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55
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Young NA, Drew SC, Maniam S, Langford SJ. Systematically Studying the Effect of Fluoride on the Properties of Cyclophanes Bearing Naphthalene Diimide and Dialkoxyaryl Groups. Chem Asian J 2017; 12:1668-1675. [DOI: 10.1002/asia.201700459] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 05/09/2017] [Indexed: 01/09/2023]
Affiliation(s)
- Nicholas A. Young
- School of Chemistry Monash University Wellington Rd Clayton Victoria 3800 Australia
| | - Simon C. Drew
- Department of Medicine Royal Melbourne Hospital The University of Melbourne Melbourne Victoria 3010 Australia
| | - Subashani Maniam
- School of Chemistry Monash University Wellington Rd Clayton Victoria 3800 Australia
| | - Steven J. Langford
- School of Chemistry Monash University Wellington Rd Clayton Victoria 3800 Australia
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56
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Zhang Z, Wang H, Wang X, Li Y, Song B, Bolarinwa O, Reese RA, Zhang T, Wang XQ, Cai J, Xu B, Wang M, Liu C, Yang HB, Li X. Supersnowflakes: Stepwise Self-Assembly and Dynamic Exchange of Rhombus Star-Shaped Supramolecules. J Am Chem Soc 2017; 139:8174-8185. [PMID: 28558196 DOI: 10.1021/jacs.7b01326] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
With the goal of increasing the complexity of metallo-supramolecules, two rhombus star-shaped supramolecular architectures, namely, supersnowflakes, were designed and assembled using multiple 2,2':6',2″-terpyridine (tpy) ligands in a stepwise manner. In the design of multicomponent self-assembly, ditopic and tritopic ligands were bridged through Ru(II) with strong coordination to form metal-organic ligands for the subsequent self-assembly with a hexatopic ligand and Zn(II). The combination of Ru(II)-organic ligands with high stability and Zn(II) ions with weak coordination played a key role in the self-assembly of giant heteroleptic supersnowflakes, which encompassed three types of tpy-based organic ligands and two metal ions. With such a stepwise strategy, the self-sorting of individual building blocks was prevented from forming the undesired assemblies, e.g., small macrocycles and coordination polymers. Furthermore, the intra- and intermolecular dynamic exchange study of two supersnowflakes by NMR and mass spectrometry revealed the remarkable stability of these giant supramolecular complexes.
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Affiliation(s)
- Zhe Zhang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, School of Chemistry, Central China Normal University , Wuhan, Hubei 430079, China.,Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
| | - Heng Wang
- Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
| | - Xu Wang
- Department of Chemistry, Texas State University , San Marcos, Texas 78666, United States
| | - Yiming Li
- Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
| | - Bo Song
- Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
| | - Olapeju Bolarinwa
- Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
| | - R Alexander Reese
- Single Molecule Study Laboratory, College of Engineering and Nanoscale Science and Engineering Center, University of Georgia , Athens, Georgia 30602, United States
| | - Tong Zhang
- Single Molecule Study Laboratory, College of Engineering and Nanoscale Science and Engineering Center, University of Georgia , Athens, Georgia 30602, United States
| | - Xu-Qing Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University , Shanghai 200062, China
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
| | - Bingqian Xu
- Single Molecule Study Laboratory, College of Engineering and Nanoscale Science and Engineering Center, University of Georgia , Athens, Georgia 30602, United States
| | - Ming Wang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun, Jilin 130012, China
| | - Changlin Liu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, School of Chemistry, Central China Normal University , Wuhan, Hubei 430079, China
| | - Hai-Bo Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University , Shanghai 200062, China
| | - Xiaopeng Li
- Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States
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57
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Xu RB, Wang QQ, Ao YF, Li ZY, Huang ZT, Wang DX. Anionic Head Containing Oxacalix[2]arene[2]triazines: Synthesis and Anion−π-Directed Self-Assembly in Solution and Solid State. Org Lett 2017; 19:738-741. [DOI: 10.1021/acs.orglett.7b00070] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rui-Bin Xu
- Beijing
National Laboratory for Molecular Sciences, CAS Key Laboratory of
Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qi-Qiang Wang
- Beijing
National Laboratory for Molecular Sciences, CAS Key Laboratory of
Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu-Fei Ao
- Beijing
National Laboratory for Molecular Sciences, CAS Key Laboratory of
Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhi-Yan Li
- Beijing
National Laboratory for Molecular Sciences, CAS Key Laboratory of
Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhi-Tang Huang
- Beijing
National Laboratory for Molecular Sciences, CAS Key Laboratory of
Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - De-Xian Wang
- Beijing
National Laboratory for Molecular Sciences, CAS Key Laboratory of
Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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58
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Singh AS, Tiwari RK, Lee MM, Behera JN, Sun SS, Chandrasekhar V. Structural Tuning of Anion-Templated Motifs with External Stimuli through Crystal-to-Crystal Transformation. Chemistry 2017; 23:762-766. [PMID: 27879018 DOI: 10.1002/chem.201604542] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Indexed: 11/10/2022]
Abstract
Protonation of trans-1,2-bis(4-pyridyl)ethylene (4,4'-bpe) with dilute sulfuric acid (33 %) afforded a protonated adduct [{4,4'-bpe⋅2 H+ }2 {HSO4 }-2 {SO4 }-2 {H2 O}2 ] (1). The neighboring olefinic bond in 1 is in a suitable range (3.931-4.064 Å) to undergo a photochemical [2+2] cycloaddition reaction. Upon irradiation with UV light (365 nm), 1 undergoes a molecular sliding involving the 4,4'-bpe⋅2 H+ units, affording 2, stabilized through OSO4 ⋅⋅⋅π interactions. Heating 1 to 50° C leads to a 3D hydrogen-bonded organic framework (HOF) (3). This process occurs through thermal dissociation of the bisulfate anion. Diffusion of iodine through the crystal lattice of 1 and 3 enables the reduction of sulfate to bisulfate, affording a 1D hydrogen-bonded chain (4). Solid-state 13 C CPMAS NMR, IR, DSC, and powder XRD studies further support stimuli-responsive structural tuning through crystal-to-crystal transformation. All these conversions occur with significant translational and rotational movements along with a series of bond-breaking and bond-forming processes.
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Affiliation(s)
- Ashutosh S Singh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
| | - Ranjay K Tiwari
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
| | - Mandy M Lee
- Institute of Chemistry, Academia Sinica, Nangang, 115, Taipei, Taiwan, ROC
| | - Jogendra N Behera
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
| | - Shih-Sheng Sun
- Institute of Chemistry, Academia Sinica, Nangang, 115, Taipei, Taiwan, ROC
| | - V Chandrasekhar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
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59
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Dolinar BS, Gómez-Coca S, Alexandropoulos DI, Dunbar KR. An air stable radical-bridged dysprosium single molecule magnet and its neutral counterpart: redox switching of magnetic relaxation dynamics. Chem Commun (Camb) 2017; 53:2283-2286. [DOI: 10.1039/c6cc09824j] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Addition of a radical to the bridging tetrazine ligand of a Dy2 complex dramatically alters the magnetic properties. The radical complex undergoes magnetic relaxation via a thermal relaxation pathway, whereas the neutral compound relaxes via quantum tunneling of the magnetization.
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Affiliation(s)
| | | | | | - Kim R. Dunbar
- Department of Chemistry
- Texas A&M University
- College Station
- USA
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60
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Huang TH, Yang H, Yang G, Zhu SL, Zhang CL. Synthesis, structural characterization and photoluminescent properties of copper(I) coordination polymers with extended C–H⋯π and CN⋯π interactions. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.10.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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61
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Kobylarczyk J, Pinkowicz D, Srebro-Hooper M, Hooper J, Podgajny R. Anion–π recognition between [M(CN)6]3− complexes and HAT(CN)6: structural matching and electronic charge density modification. Dalton Trans 2017; 46:3482-3491. [DOI: 10.1039/c7dt00293a] [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
The first example of an anion–π charge transfer (CT) system between an anionic complex and a multisite anion receptor in the solid state and in solution was constructed based on prediction of structural and electronic matching of the building blocks.
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Affiliation(s)
| | - Dawid Pinkowicz
- Faculty of Chemistry
- Jagiellonian University in Kraków
- 30-060 Kraków
- Poland
| | | | - James Hooper
- Faculty of Chemistry
- Jagiellonian University in Kraków
- 30-060 Kraków
- Poland
| | - Robert Podgajny
- Faculty of Chemistry
- Jagiellonian University in Kraków
- 30-060 Kraków
- Poland
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62
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Liu L, Lyu G, Liu C, Jiang F, Yuan D, Sun Q, Zhou K, Chen Q, Hong M. Controllable Reassembly of a Dynamic Metallocage: From Thermodynamic Control to Kinetic Control. Chemistry 2016; 23:456-461. [DOI: 10.1002/chem.201604540] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Indexed: 01/06/2023]
Affiliation(s)
- Luyao Liu
- State Key Laboratory of Structure Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
| | - Guangxun Lyu
- State Key Laboratory of Structure Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
| | - Caiping Liu
- State Key Laboratory of Structure Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
| | - Feilong Jiang
- State Key Laboratory of Structure Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
| | - Daqiang Yuan
- State Key Laboratory of Structure Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049 (China)
| | - Qingfu Sun
- State Key Laboratory of Structure Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049 (China)
| | - Kang Zhou
- State Key Laboratory of Structure Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
| | - Qihui Chen
- State Key Laboratory of Structure Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049 (China)
| | - Maochun Hong
- State Key Laboratory of Structure Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian 350002 P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049 (China)
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63
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Mononuclear, tetranuclear and polymeric cadmium(II) complexes with the 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine ligand: Synthesis, crystal structure, spectroscopic and DFT studies. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.08.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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64
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Moussa ME, Attenberger B, Fleischmann M, Schreiner A, Scheer M. The Diphosphorus Complex [Cp 2Mo 2(CO) 4(η 2-P 2)] as a Building Block for the Synthesis of Mixed-Hybrid Coordination Polymers. Eur J Inorg Chem 2016; 2016:4538-4541. [PMID: 27867315 PMCID: PMC5101867 DOI: 10.1002/ejic.201600895] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Indexed: 12/27/2022]
Abstract
The three-component reaction of the tetrahedral diphosphorus complex [Cp2Mo2(CO)4(η2-P2)] (1), with Ag[BF4] (2) in the presence of 2,2'-bipyrimidine (3) leads to the formation of the two novel two-dimensional networks 4 and 5. Compound 4 is a new two-dimensional organometallic-organic hybrid polymer, while derivative 5 represents a unique two-dimensional organometallic-inorganic-organic hybrid polymer. These results show the possibility of synthesizing a new class of coordination polymers, which could not be obtained from two-component reactions with organic molecules in addition of metal ions.
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Affiliation(s)
- Mehdi Elsayed Moussa
- Institut für Anorganische Chemie der Universität Regensburg93040RegensburgGermany
| | - Bianca Attenberger
- Institut für Anorganische Chemie der Universität Regensburg93040RegensburgGermany
| | - Martin Fleischmann
- Institut für Anorganische Chemie der Universität Regensburg93040RegensburgGermany
| | - Andrea Schreiner
- Institut für Anorganische Chemie der Universität Regensburg93040RegensburgGermany
| | - Manfred Scheer
- Institut für Anorganische Chemie der Universität Regensburg93040RegensburgGermany
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65
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66
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Li Y, Jiang Z, Wang M, Yuan J, Liu D, Yang X, Chen M, Yan J, Li X, Wang P. Giant, Hollow 2D Metalloarchitecture: Stepwise Self-Assembly of a Hexagonal Supramolecular Nut. J Am Chem Soc 2016; 138:10041-6. [DOI: 10.1021/jacs.6b06021] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yiming Li
- Department
of Organic and Polymer Chemistry, College of Chemistry and Chemical
Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Zhilong Jiang
- Department
of Organic and Polymer Chemistry, College of Chemistry and Chemical
Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Ming Wang
- Department
of Chemistry and Biochemistry and Materials Science, Engineering,
and Commercialization Program, Texas State University, San Marcos, Texas 78666, United States
| | - Jie Yuan
- Department
of Organic and Polymer Chemistry, College of Chemistry and Chemical
Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Die Liu
- Department
of Organic and Polymer Chemistry, College of Chemistry and Chemical
Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Xiaoyu Yang
- Department
of Organic and Polymer Chemistry, College of Chemistry and Chemical
Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Mingzhao Chen
- Department
of Organic and Polymer Chemistry, College of Chemistry and Chemical
Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Jun Yan
- Department
of Organic and Polymer Chemistry, College of Chemistry and Chemical
Engineering, Central South University, Changsha, Hunan 410083, P. R. China
| | - Xiaopeng Li
- Department
of Chemistry and Biochemistry and Materials Science, Engineering,
and Commercialization Program, Texas State University, San Marcos, Texas 78666, United States
| | - Pingshan Wang
- Department
of Organic and Polymer Chemistry, College of Chemistry and Chemical
Engineering, Central South University, Changsha, Hunan 410083, P. R. China
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67
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Savastano M, Bazzicalupi C, Giorgi C, García-Gallarín C, López de la Torre MD, Pichierri F, Bianchi A, Melguizo M. Anion Complexes with Tetrazine-Based Ligands: Formation of Strong Anion-π Interactions in Solution and in the Solid State. Inorg Chem 2016; 55:8013-24. [PMID: 27454810 DOI: 10.1021/acs.inorgchem.6b01138] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ligands L1 and L2, consisting of a tetrazine ring decorated with two morpholine pendants of different lengths, show peculiar anion-binding behaviors. In several cases, even the neutral ligands, in addition to their protonated HL(+) and H2L(2+) (L = L1 and L2) forms, bind anions such as F(-), NO3(-), PF6(-), ClO4(-), and SO4(2-) to form stable complexes in water. The crystal structures of H2L1(PF6)2·2H2O, H2L1(ClO4)2·2H2O, H2L2(NO3)2, H2L2(PF6)2·H2O, and H2L2(ClO4)2·H2O show that anion-π interactions are pivotal for the formation of these complexes, although other weak forces may contribute to their stability. Complex stability constants were determined by means of potentiometric titration in aqueous solution at 298.1 K, while dissection of the free-energy change of association (ΔG°) into its enthalpic (ΔH°) and entropic (TΔS°) components was accomplished by means of isothermal titration calorimetry measurements. Stability constants are poorly regulated by anion-ligand charge-charge attraction. Thermodynamic data show that the formation of complexes with neutral ligands, which are principally stabilized by anion-π interactions, is enthalpically favorable (-ΔG°, 11.1-17.5 kJ/mol; ΔH°, -2.3 to -0.5 kJ/mol; TΔS°, 9.0-17.0 kJ/mol), while for charged ligands, enthalpy changes are mostly unfavorable. Complexation reactions are invariably promoted by large and favorable entropic contributions. The importance of desolvation phenomena manifested by such thermodynamic data was confirmed by the hydrodynamic results obtained by means of diffusion NMR spectroscopy. In the case of L2, complexation equilibria were also studied in a 80:20 (v/v) water/ethanol mixture. In this mixed solvent of lower dielectric constant than water, the stability of anion complexes decreases, relative to water. Solvation effects, mostly involving the ligand, are thought to be responsible for this peculiar behavior.
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Affiliation(s)
- Matteo Savastano
- Department of Chemistry "Ugo Schiff", University of Florence , Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Carla Bazzicalupi
- Department of Chemistry "Ugo Schiff", University of Florence , Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Claudia Giorgi
- Department of Chemistry "Ugo Schiff", University of Florence , Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | | | | | - Fabio Pichierri
- Department of Applied Chemistry, Graduate School of Engineering, Tohoku University , 980-8579 Sendai, Japan
| | - Antonio Bianchi
- Department of Chemistry "Ugo Schiff", University of Florence , Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Manuel Melguizo
- Department of Inorganic and Organic Chemistry, University of Jaén , 23071 Jaén, Spain
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68
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Elsayed Moussa M, Attenberger B, Peresypkina EV, Fleischmann M, Balázs G, Scheer M. Facile synthesis of one-dimensional organometallic-organic hybrid polymers based on a diphosphorus complex and flexible bipyridyl linkers. Chem Commun (Camb) 2016; 52:10004-7. [PMID: 27444554 DOI: 10.1039/c6cc05224j] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The selective synthesis of a series of new "ladderlike" one-dimensional organometallic-organic hybrid polymers is shown. The polymers are obtained from the reaction of the diphosphorus ligand complex [Cp2Mo2(CO)4(η(2)-P2)] with the copper salt [Cu(CH3CN)4]BF4 in the presence of flexible organic bipyridyl linkers in high selectivity. This unique behaviour is supported by DFT calculations.
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Affiliation(s)
- M Elsayed Moussa
- Institute für Anorganische Chemie der Universitöt Regensburg, 93040 Regensburg, Germany.
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69
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Ramsay WJ, Rizzuto FJ, Ronson TK, Caprice K, Nitschke JR. Subtle Ligand Modification Inverts Guest Binding Hierarchy in MII8L6 Supramolecular Cubes. J Am Chem Soc 2016; 138:7264-7. [DOI: 10.1021/jacs.6b03858] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- William J. Ramsay
- Department of Chemistry, University of Cambridge, Cambridge, United Kingdom CB2 1EW
| | - Felix J. Rizzuto
- Department of Chemistry, University of Cambridge, Cambridge, United Kingdom CB2 1EW
| | - Tanya K. Ronson
- Department of Chemistry, University of Cambridge, Cambridge, United Kingdom CB2 1EW
| | - Kenji Caprice
- Department of Chemistry, University of Cambridge, Cambridge, United Kingdom CB2 1EW
| | - Jonathan R. Nitschke
- Department of Chemistry, University of Cambridge, Cambridge, United Kingdom CB2 1EW
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70
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Kieffer M, Pilgrim BS, Ronson TK, Roberts DA, Aleksanyan M, Nitschke JR. Perfluorinated Ligands Induce Meridional Metal Stereochemistry to Generate M8L12, M10L15, and M12L18 Prisms. J Am Chem Soc 2016; 138:6813-21. [DOI: 10.1021/jacs.6b02445] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Marion Kieffer
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| | - Ben S. Pilgrim
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| | - Tanya K. Ronson
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| | - Derrick A. Roberts
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| | - Mina Aleksanyan
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
| | - Jonathan R. Nitschke
- Department of Chemistry, University of Cambridge, Lensfield
Road, Cambridge CB2 1EW, United Kingdom
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71
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Rizzuto FJ, Wu WY, Ronson TK, Nitschke JR. Peripheral Templation Generates an M(II) 6 L4 Guest-Binding Capsule. Angew Chem Int Ed Engl 2016; 55:7958-62. [PMID: 27095669 PMCID: PMC4999047 DOI: 10.1002/anie.201602135] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Indexed: 11/06/2022]
Abstract
Pseudo‐octahedral MII6L4 capsules result from the subcomponent self‐assembly of 2‐formylphenanthroline, threefold‐symmetric triamines, and octahedral metal ions. Whereas neutral tetrahedral guests and most of the anions investigated were observed to bind within the central cavity, tetraphenylborate anions bound on the outside, with one phenyl ring pointing into the cavity. This binding configuration is promoted by the complementary arrangement of the phenyl rings of the intercalated guest between the phenanthroline units of the host. The peripherally bound, rapidly exchanging tetraphenylborate anions were found to template an otherwise inaccessible capsular structure in a manner usually associated with slow‐exchanging, centrally bound agents. Once formed, this cage was able to bind guests in its central cavity.
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Affiliation(s)
- Felix J Rizzuto
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Wen-Yuan Wu
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.,College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211800, P.R. China)
| | - Tanya K Ronson
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Jonathan R Nitschke
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
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72
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73
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Study of a novel hepta-coordinated FeIII bimetallic complex with an unusual 1,2,4,5-tetrazine-ring opening. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.11.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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74
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Anion–π interactions in complexes of proteins and halogen-containing amino acids. J Biol Inorg Chem 2016; 21:357-68. [DOI: 10.1007/s00775-016-1346-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Accepted: 02/08/2016] [Indexed: 10/22/2022]
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75
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Recognition of halides and Y-shaped oxoanions by carbonylchromium-based urea-like molecules: A theoretical analysis of hydrogen bonding modes. J Mol Graph Model 2016; 64:1-10. [PMID: 26751799 DOI: 10.1016/j.jmgm.2015.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 12/07/2015] [Accepted: 12/18/2015] [Indexed: 11/21/2022]
Abstract
One of the major challenges in anion recognition is to design hosts that can be used to distinguish between anions of different shapes. Urea-based molecules are widely used in anion recognition because the pair of -NH groups acts as an electron acceptor. Although these hosts can bind to both spherical anions (halides) and Y-shaped anions (oxoanions), experimental evidence to date does not provide a clear picture of what differences in the nature of the hydrogen bonding interactions could be used to distinguish between anions of different shapes. Here, we use several computational topology analyses to study the non-covalent interactions between Cr(CO)3-based organometallic urea-like hosts and halides and Y-shaped oxoanions. Our results suggest that the F(-) and AcO(-) anions are recognized experimentally due to a combination of strong interaction and large infrared (IR) shifts upon complexation, verifying the remarkable IR-reporting ability of the Cr(CO)3 moiety and its potential applications in anion recognition. The lone pairs of the oxygen atom in Y-shaped oxoanions directly interact with the -NH groups of the hosts, while all the shell electrons of the halides participate as a group in the interaction; however, the relative contributions of electrostatic and charge-transfer interactions are quite similar for the two types of anions. This insight into the nature of the anion-host interactions can be used to provide guidance for the design of hosts that differentiate between anions.
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76
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One-dimensional mercury(II) halide coordination polymers of 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine ligand: Synthesis, crystal structure, spectroscopic and DFT studies. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2015.11.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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77
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Wang W, Wang YX, Yang HB. Supramolecular transformations within discrete coordination-driven supramolecular architectures. Chem Soc Rev 2016; 45:2656-93. [DOI: 10.1039/c5cs00301f] [Citation(s) in RCA: 432] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In this review, a comprehensive summary of supramolecular transformations within discrete coordination-driven supramolecular architectures, including helices, metallacycles, metallacages, etc., is presented.
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Affiliation(s)
- Wei Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Yu-Xuan Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Hai-Bo Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- East China Normal University
- Shanghai 200062
- P. R. China
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78
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Kang P, Jung S, Lee J, Kang HJ, Lee H, Choi MG. Anion induced structural transformation in silver-(3,6-dimethoxy-1,2,4,5-tetrazine) coordination polymers under mechanochemical conditions. Dalton Trans 2016; 45:11949-52. [DOI: 10.1039/c6dt01834c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mechanochemical processes allow the 1D chain of [Ag(dmotz)(CF3SO3)]n to easily convert to a 2D grid network of {[Ag(dmotz)2](ClO4)}n in the presence of [ClO4]−.
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Affiliation(s)
- Philjae Kang
- Department of Chemistry
- Yonsei University
- Seoul
- Korea
| | - Sooyong Jung
- Department of Chemistry
- Yonsei University
- Seoul
- Korea
| | - Junhyung Lee
- Department of Chemistry
- Yonsei University
- Seoul
- Korea
| | - Hye Ji Kang
- Department of Chemistry
- Yonsei University
- Seoul
- Korea
| | - Hyehee Lee
- Department of Chemistry
- Yonsei University
- Seoul
- Korea
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79
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Bauzá A, Mooibroek TJ, Frontera A. Towards design strategies for anion–π interactions in crystal engineering. CrystEngComm 2016. [DOI: 10.1039/c5ce01813g] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This highlight article summarizes some of the fundamental aspects of the anion–π interaction leading to several design strategies for generating it in solids. In the main body we highlight some relevant examples that illustrate the viability of these strategies and the importance of anion–π interactions in crystal engineering.
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Affiliation(s)
- Antonio Bauzá
- Departament de Quimica
- Universitat de les Illes Balears
- 07122 Palma de Mallorca, Spain
| | | | - Antonio Frontera
- Departament de Quimica
- Universitat de les Illes Balears
- 07122 Palma de Mallorca, Spain
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80
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Ramsay WJ, Foster JA, Moore KL, Ronson TK, Mirgalet RJ, Jefferson DA, Nitschke JR. Au ICl-bound N-heterocyclic carbene ligands form MII4(LAuCl) 6 integrally gilded cages. Chem Sci 2015; 6:7326-7331. [PMID: 28757991 PMCID: PMC5512534 DOI: 10.1039/c5sc03065j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 09/23/2015] [Indexed: 11/21/2022] Open
Abstract
The incorporation of an N-heterocyclic carbene (NHC) moiety into a self-assembled MII4L6 cage framework required the NHC first to be metallated with gold(i). Bimetallic cages could then be constructed using zinc(ii) and cadmium(ii) templates, showing weak luminescence. The cages were destroyed by the addition of further gold(i) in the form of AuI(2,4,6-trimethoxybenzonitrile)2SbF6, which caused the reversibly-formed cages to disassemble and controllably release the AuI-NHC subcomponent into solution. This release in turn induced the growth of gold nanoparticles. The rate of dianiline release could be tuned by capsule design or through the addition of chemical stimuli, with different release profiles giving rise to different nanoparticle morphologies.
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Affiliation(s)
- William J Ramsay
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
| | - Jonathan A Foster
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
| | - Katharine L Moore
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
| | - Tanya K Ronson
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
| | - Raphaël J Mirgalet
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
| | - David A Jefferson
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
| | - Jonathan R Nitschke
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
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81
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Browne C, Ramsay WJ, Ronson TK, Medley-Hallam J, Nitschke JR. Carbon dioxide fixation and sulfate sequestration by a supramolecular trigonal bipyramid. Angew Chem Int Ed Engl 2015; 54:11122-7. [PMID: 26235039 DOI: 10.1002/anie.201504856] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Indexed: 11/07/2022]
Abstract
The subcomponent self-assembly of a bent dialdehyde ligand and different cationic and anionic templates led to the formation of two new metallosupramolecular architectures: a Fe(II) 4 L6 molecular rectangle was isolated following reaction of the ligand with iron(II) tetrafluoroborate, and a M5 L6 trigonal bipyramidal structure was constructed from either zinc(II) tetrafluoroborate or cadmium(II) trifluoromethanesulfonate. The spatially constrained arrangement of the three equatorial metal ions in the M5 L6 structures was found to induce small-molecule transformations. Atmospheric carbon dioxide was fixed as carbonate and bound to the equatorial metal centers in both the Zn5 L6 and Cd5 L6 assemblies, and sulfur dioxide was hydrated and bound as the sulfite dianion in the Zn5 L6 structure. Subsequent in situ oxidation of the sulfite dianion resulted in a sulfate dianion bound within the supramolecular pocket.
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Affiliation(s)
- Colm Browne
- University of Cambridge, Department of Chemistry, Lensfield Road, Cambridge, CB2 1EW (UK) http://www-jrn.ch.cam.ac.uk/,Current address: School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL (UK)
| | - William J Ramsay
- University of Cambridge, Department of Chemistry, Lensfield Road, Cambridge, CB2 1EW (UK) http://www-jrn.ch.cam.ac.uk/
| | - Tanya K Ronson
- University of Cambridge, Department of Chemistry, Lensfield Road, Cambridge, CB2 1EW (UK) http://www-jrn.ch.cam.ac.uk/
| | - John Medley-Hallam
- University of Cambridge, Department of Chemistry, Lensfield Road, Cambridge, CB2 1EW (UK) http://www-jrn.ch.cam.ac.uk/
| | - Jonathan R Nitschke
- University of Cambridge, Department of Chemistry, Lensfield Road, Cambridge, CB2 1EW (UK) http://www-jrn.ch.cam.ac.uk/.
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82
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Browne C, Ramsay WJ, Ronson TK, Medley-Hallam J, Nitschke JR. Carbon Dioxide Fixation and Sulfate Sequestration by a Supramolecular Trigonal Bipyramid. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504856] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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83
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The Bright Future of Unconventional σ/π-Hole Interactions. Chemphyschem 2015; 16:2496-517. [DOI: 10.1002/cphc.201500314] [Citation(s) in RCA: 475] [Impact Index Per Article: 52.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Indexed: 01/25/2023]
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84
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Riddell IA, Ronson TK, Nitschke JR. Mutual stabilisation between M II4L 6 tetrahedra and M IIX 42- metallate guests. Chem Sci 2015; 6:3533-3537. [PMID: 28706711 PMCID: PMC5492872 DOI: 10.1039/c5sc01083g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 04/14/2015] [Indexed: 12/26/2022] Open
Abstract
A complex host-guest equilibrium employing metal ions incorporated into both the host and guest is discussed. MIIX42- metallate guests are shown to provide a good size and shape match for encapsulation within the M4L6 tetrahedral capsules, facilitating the generation of previously unreported Zn4L6 complexes. Displacement of the initial, primary template anion (ZnBr42-) by a secondary template anion (ClO4-) is shown to result in the formation of a pentagonal-prismatic Zn10L15 structure that incorporates both Br- and ClO4-. Furthermore, the formation of heterometallic complexes provides direct evidence for metal exchange between the guest and host complex.
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Affiliation(s)
- Imogen A Riddell
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Tanya K Ronson
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Jonathan R Nitschke
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
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85
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Wheeler SE, Bloom JWG. Anion-π interactions and positive electrostatic potentials of N-heterocycles arise from the positions of the nuclei, not changes in the π-electron distribution. Chem Commun (Camb) 2015; 50:11118-21. [PMID: 25116837 DOI: 10.1039/c4cc05304d] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We show that the positive electrostatic potentials and molecular quadrupole moments characteristic of π-acidic azines, which underlie the ability of these rings to bind anions above their centres, arise from the position of nuclear charges, not changes in the π-electron density distribution.
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Affiliation(s)
- Steven E Wheeler
- Department of Chemistry, Texas A&M University, College Station, TX, USA.
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86
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Syntheses, crystal structures and properties of series of 4d–4f ln(III)–Ag(I) heterometallic coordination polymers. J SOLID STATE CHEM 2015. [DOI: 10.1016/j.jssc.2014.11.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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87
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Kawamoto K, Grindy SC, Liu J, Holten-Andersen N, Johnson JA. Dual Role for 1,2,4,5-Tetrazines in Polymer Networks: Combining Diels-Alder Reactions and Metal Coordination To Generate Functional Supramolecular Gels. ACS Macro Lett 2015; 4:458-461. [PMID: 35596313 DOI: 10.1021/acsmacrolett.5b00221] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The inverse-electron demand Diels-Alder cycloaddition of tetrazines and olefins has emerged as a powerful coupling reaction for the formation of polymer gels with diverse applications. Tetrazines are also excellent ligands for metal atoms. For example, 3,6-bis(2-pyridyl)-1,2,4,5-tetrazines (bptz) have been used to generate discrete supramolecular Mxbptzy metal clusters and extended 2D grid structures. We reasoned that both the Diels-Alder and the metal-coordination modes of reactivity of bptz derivatives could be leveraged in the context of hydrogel design to yield novel hybrid materials. Here we report on the formation of supramolecular hydrogels via substoichiometric Diels-Alder functionalization of bptz ligands bound to the ends of poly(ethylene glycol) (PEG) chains followed by metal-coordination-induced gelation in the presence of Ni2+ and Fe2+ salts. Our results show that simple bptz-based polymers are versatile precursors to a diverse range of novel functional materials.
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Affiliation(s)
- Ken Kawamoto
- Department of Chemistry and ‡Department of Materials
Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| | - Scott C. Grindy
- Department of Chemistry and ‡Department of Materials
Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| | - Jenny Liu
- Department of Chemistry and ‡Department of Materials
Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| | - Niels Holten-Andersen
- Department of Chemistry and ‡Department of Materials
Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| | - Jeremiah A. Johnson
- Department of Chemistry and ‡Department of Materials
Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
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88
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Ramsay WJ, Szczypiński FT, Weissman H, Ronson TK, Smulders MMJ, Rybtchinski B, Nitschke JR. Designed Enclosure Enables Guest Binding Within the 4200 Å3Cavity of a Self-Assembled Cube. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501892] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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89
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Ramsay WJ, Szczypiński FT, Weissman H, Ronson TK, Smulders MMJ, Rybtchinski B, Nitschke JR. Designed Enclosure Enables Guest Binding Within the 4200 Å3Cavity of a Self-Assembled Cube. Angew Chem Int Ed Engl 2015; 54:5636-40. [DOI: 10.1002/anie.201501892] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Indexed: 01/28/2023]
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90
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Cook TR, Stang PJ. Recent Developments in the Preparation and Chemistry of Metallacycles and Metallacages via Coordination. Chem Rev 2015; 115:7001-45. [DOI: 10.1021/cr5005666] [Citation(s) in RCA: 1299] [Impact Index Per Article: 144.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Timothy R. Cook
- Department
of Chemistry, University at Buffalo, State University of New York, 359 Natural Sciences Complex, Buffalo, New York 14260, United States
| | - Peter J. Stang
- Department
of Chemistry, University of Utah, 315 S. 1400 E. Room 2020, Salt Lake City, Utah 84112, United States
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91
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Wood DM, Meng W, Ronson TK, Stefankiewicz AR, Sanders JKM, Nitschke JR. Guest-Induced Transformation of a Porphyrin-Edged FeII4L6Capsule into a CuIFeII2L4Fullerene Receptor. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411985] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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92
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Wood DM, Meng W, Ronson TK, Stefankiewicz AR, Sanders JKM, Nitschke JR. Guest-induced transformation of a porphyrin-edged Fe(II)4L6 capsule into a Cu(I)Fe(II)2L4 fullerene receptor. Angew Chem Int Ed Engl 2015; 54:3988-92. [PMID: 25655272 DOI: 10.1002/anie.201411985] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Indexed: 11/09/2022]
Abstract
The combination of a bent diamino(nickel(II) porphyrin) with 2-formylpyridine and Fe(II) yielded an Fe(II) 4 L6 cage. Upon treatment with the fullerenes C60 or C70 , this cage was found to transform into a new host-guest complex incorporating three Fe(II) centers and four porphyrin ligands, in an arrangement that is hypothesized to maximize π interactions between the porphyrin units of the host and the fullerene guest bound within its central cavity. The new complex shows coordinative unsaturation at one of the Fe(II) centers as the result of the incommensurate metal-to-ligand ratio, which enabled the preparation of a heterometallic cone-shaped Cu(I) Fe(II) 2 L4 adduct of C60 or C70 .
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Affiliation(s)
- Daniel M Wood
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW (UK)
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93
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Heterotetranuclear Complexes of Reduced and Non-reduced Bridging 1,2,4,5-Tetrazine Ligands with 1,1′-Bis(diphenylphosphanyl)-ferrocene-copper(I). Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201400564] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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94
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González-Mendoza L, Altava B, Burguete MI, Escorihuela J, Hernando E, Luis SV, Quesada R, Vicent C. Bis(imidazolium) salts derived from amino acids as receptors and transport agents for chloride anions. RSC Adv 2015. [DOI: 10.1039/c5ra05880e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Binding properties towards different anions and chloride transport activity have been studied using different bis(imidazolium) salts.
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Affiliation(s)
| | - Belén Altava
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- E-12071 Castellón
- Spain
| | - M. Isabel Burguete
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- E-12071 Castellón
- Spain
| | - Jorge Escorihuela
- Wageningen UR
- Laboratory of Organic Chemistry
- 6703 HB Wageningen
- The Netherlands
| | - Elsa Hernando
- Departamento de Química
- Facultad de Ciencias
- Universidad de Burgos
- 09001 Burgos
- Spain
| | - Santiago V. Luis
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- E-12071 Castellón
- Spain
| | - Roberto Quesada
- Departamento de Química
- Facultad de Ciencias
- Universidad de Burgos
- 09001 Burgos
- Spain
| | - Cristian Vicent
- Serveis Centrals d'Instrumentació Científica
- Universitat Jaume I
- 12071 Castellón
- Spain
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95
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Anion-π Interactions in Supramolecular Chemistry and Catalysis. CHALLENGES AND ADVANCES IN COMPUTATIONAL CHEMISTRY AND PHYSICS 2015. [DOI: 10.1007/978-3-319-14163-3_16] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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96
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Zlatović MV, Borozan SZ, Nikolić MR, Stojanović SĐ. Anion–π interactions in protein–porphyrin complexes. RSC Adv 2015. [DOI: 10.1039/c5ra03373j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work, we have analyzed the influence of anion–π interactions on the stability of high resolution protein–porphyrin complex crystal structures.
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Affiliation(s)
| | - Sunčica Z. Borozan
- Department of Chemistry
- Faculty of Veterinary Medicine
- University of Belgrade
- Belgrade
- Serbia
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Breberina LM, Milčić MK, Nikolić MR, Stojanović SĐ. Contribution of anion-π interactions to the stability of Sm/LSm proteins. J Biol Inorg Chem 2014; 20:475-85. [PMID: 25502146 DOI: 10.1007/s00775-014-1227-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 11/29/2014] [Indexed: 12/29/2022]
Abstract
We have analyzed the influence of anion-π interactions to the stability of Sm/LSm assemblies. The side chain of Glu is more likely to be in anion-π interactions than Asp. Phe has the highest occurrence in these interactions than the other two π residues. Among the anion-π residue pairs, Glu-Phe residue pair showed the maximum number of anion-π. We have found hot-spot residues forming anion-π interactions, and Glu-Phe is the most common hot-spot interacting pair. The significant numbers of anion-π interacting residues identified in the dataset were involved in the formation of multiple anion-π interactions. More than half of the residues involved in these interactions are evolutionarily conserved. The anion-π interaction energies are distance and orientation dependent. It was found that anion-π interactions showed energy less than -15 kcal mol(-1), and most of them have energy in the range -2 to -9 kcal mol(-1). Solvent accessibility pattern of Sm/LSm proteins reveals that all of the interacting residues are preferred to be in buried regions. Most of the interacting residues preferred to be in strand. A significant percentage of anion-π interacting residues are located as stabilization centers and thus might provide additional stability to these proteins. The simultaneous interaction of anions and cations on different faces of the same π-system has been observed. On the whole, the results presented in this work will be very useful for understanding the contribution of anion-π interaction to the stability of Sm/LSm proteins.
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Hafezi N, Holcroft JM, Hartlieb KJ, Dale EJ, Vermeulen NA, Stern CL, Sarjeant AA, Stoddart JF. Modulating the binding of polycyclic aromatic hydrocarbons inside a hexacationic cage by anion-π interactions. Angew Chem Int Ed Engl 2014; 54:456-61. [PMID: 25410825 DOI: 10.1002/anie.201408400] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Indexed: 12/12/2022]
Abstract
We report the template-directed synthesis of BlueCage(6+), a macrobicyclic cyclophane composed of six pyridinium rings fused with two central triazines and bridged by three paraxylylene units. These moieties endow the cage with a remarkably electron-poor cavity, which makes it a powerful receptor for polycyclic aromatic hydrocarbons (PAHs). Upon forming a 1:1 complex with pyrene in acetonitrile, however, BlueCage⋅6 PF6 exhibits a lower association constant Ka than its progenitor ExCage⋅6 PF6. A close inspection reveals that the six PF6(-) counterions of BlueCage(6+) occupy the cavity in a fleeting manner as a consequence of anion-π interactions and, as a result, compete with the PAH guests. This conclusion is supported by a one order of magnitude increase in the Ka value for pyrene in BlueCage(6+) when the PF6(-) counterions are replaced by much bulkier anions. The presence of anion-π interactions is supported by X-ray crystallography, and confirms the presence of a PF6(-) counterion inside its cavity.
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Affiliation(s)
- Nema Hafezi
- Center for the Chemistry of Integrated Systems, Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
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Hafezi N, Holcroft JM, Hartlieb KJ, Dale EJ, Vermeulen NA, Stern CL, Sarjeant AA, Stoddart JF. Modulating the Binding of Polycyclic Aromatic Hydrocarbons Inside a Hexacationic Cage by Anion-π Interactions. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408400] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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