1
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Martínez-Aguirre MA, Ortega-Valdovinos LR, Villamil-Ramos R, Yatsimirsky AK. Anion Recognition by Benzoxaborole. J Org Chem 2022; 87:7734-7746. [PMID: 35612515 DOI: 10.1021/acs.joc.2c00324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The binding types (H-bonding or coordinate) and stability constants for complexes of 11 mono- and di-anions with benzoxaborole (1) were determined by 1H and 11B NMR titrations in DMSO or MeCN. Compared to phenylboronic acid (PBA), 1 is a stronger Lewis acid and a poorer H-bond donor with only one B-OH group, which is expected therefore to recognize anions mostly through the coordinate bonding. This is the case however only with F-, HPO42-, and PhPO32- anions, which are coordinately bonded to 1, and partially with SO42-, which forms only the H-bonded complex with PBA, but both H-bonded and coordinate complexes with 1. The majority of tested anions (AcO-, PhPO3H-, (PhO)2PO2-, Cl-, and Br-) form H-bonded complexes with both 1 and PBA, whereas H2PO4- changes the binding mode from coordinate for PBA to H-bonded for 1. The preferable binding type for each anion is confirmed by calculations of DFT-optimized structures of the anion complexes of 1. The preferable binding type can be rationalized considering the effects of the steric hindrance, more significant for the coordinate bonding, and of increased anion basicity, which is favorable for both binding types, but enhances the strength of coordinate bonding more significantly than the strength of H-bonding.
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Affiliation(s)
| | | | - Raúl Villamil-Ramos
- Centro de Investigaciones Químicas-IICBA, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, C.P. 62209 Cuernavaca, Morelos, México
| | - Anatoly K Yatsimirsky
- Facultad de Química, Universidad Nacional Autónoma de México, 04510 México D.F., México
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2
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Kubik S. When Molecules Meet in Water-Recent Contributions of Supramolecular Chemistry to the Understanding of Molecular Recognition Processes in Water. Chemistry 2022; 11:e202200028. [PMID: 35373466 PMCID: PMC8977507 DOI: 10.1002/open.202200028] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/17/2022] [Indexed: 12/19/2022]
Abstract
Molecular recognition processes in water differ from those in organic solvents in that they are mediated to a much greater extent by solvent effects. The hydrophobic effect, for example, causes molecules that only weakly interact in organic solvents to stay together in water. Such water‐mediated interactions can be very efficient as demonstrated by many of the synthetic receptors discussed in this review, some of which have substrate affinities matching or even surpassing those of natural binders. However, in spite of considerable success in designing such receptors, not all factors determining their binding properties in water are fully understood. Existing concepts still provide plausible explanations why the reorganization of water molecules often causes receptor‐substrate interactions in water to be strongly exothermic rather than entropically favored as predicted by the classical view of the hydrophobic effect.
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Affiliation(s)
- Stefan Kubik
- Technische Universität Kaiserslautern, Fachbereich Chemie - Organische Chemie, Erwin-Schrödinger-Straße 54, 67663, Kaiserslautern, Germany
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3
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Jökel J, Nyßen F, Siegmund D, Apfel UP. An asymmetric cryptand for the site-specific coordination of 3d metals in multiple oxidation states. Dalton Trans 2021; 50:14602-14610. [PMID: 34596655 DOI: 10.1039/d1dt02075g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bis-tren (tren = tris(2-aminoethyl)amine) azacryptands were previously studied profoundly for the coordination of two +II metals and subsequent binding of substrates within their cavity. Likewise, cryptates including metals in different oxidations states were reported with the rather unstable hexa-imine analogues but also revealed only little stability. In this work, we report the synthesis of an asymmetric hexa-amine cryptand analogue by selectively exchanging three of the secondary amines of one binding site with sulphur atoms. We show that the presence of two distinct binding sites allows for the selective formation of stable dinuclear complexes of metals with different oxidation numbers and present the formation of distinct CuICoII, CuINiII and CuICuIII cryptates.
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Affiliation(s)
- Julia Jökel
- Inorganic Chemistry I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany.
| | - Frauke Nyßen
- Inorganic Chemistry I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany.
| | - Daniel Siegmund
- Department of Electrosynthesis, Fraunhofer UMSICHT, Osterfelder Str. 3, 46047 Oberhausen, Germany
| | - Ulf-Peter Apfel
- Inorganic Chemistry I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany. .,Department of Electrosynthesis, Fraunhofer UMSICHT, Osterfelder Str. 3, 46047 Oberhausen, Germany
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4
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Akine S, Miyashita M, Nabeshima T. Enhancement of Alkali Metal Ion Recognition by Metalation of a Tris(saloph) Cryptand Having Benzene Rings at the Bridgeheads. Inorg Chem 2021; 60:12961-12971. [PMID: 34310880 DOI: 10.1021/acs.inorgchem.1c01376] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A cryptand derivative, H6L, which has three H2saloph arms connected by two benzene ring bridgeheads, was synthesized and converted into the trinuclear metallocryptand, LNi3. The nonmetalated host, H6L, was found to bind to alkali metal ions (Na+, K+, Rb+, Cs+; logKa = 3.37-6.67) in its well-defined cavity in DMSO/chloroform (1:9). The binding affinity was enhanced by 1-2 orders of magnitude upon the conversion into the metallocryptand, LNi3, which can be explained by the more polarized phenoxo groups in the [Ni(saloph)] arms. The guest binding affinity of Na+ < K+ < Rb+ ≈ Cs+ was clearly demonstrated by the 1H NMR competition experiments. The DFT calculations suggested that the Rb+ ion most suitably fit into the benzene-benzene spacing with a cation-π interaction and that only the largest Cs+ ion can almost equally interact with all six phenoxo oxygen donor atoms. The metallocryptand, LNi3, also showed a strong binding affinity to Ag+ by taking advantage of cation-π interactions, which was confirmed by spectroscopic titrations and crystallographic analysis as well as DFT calculations. Thus, the well-defined three-dimensional cavity of LNi3 was found to be suitable for strong binding with alkali metal ions as well as Ag+.
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Affiliation(s)
- Shigehisa Akine
- Graduate School of Natural Science and Technology/Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Masato Miyashita
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
| | - Tatsuya Nabeshima
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
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5
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Ortega-Valdovinos LR, Valdes-García J, Bazany-Rodríguez IJ, Lugo-González JC, Dorazco-González A, Yatsimirsky AK. Anion recognition by anthracene appended ortho-aminomethylphenylboronic acid: a new PET-based sensing mechanism. NEW J CHEM 2021. [DOI: 10.1039/d1nj02684d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carboxylate, phosphate and sulphate anions form hydrogen bonded complexes with the B(OH)2 group of the receptor 1 producing a turn-off fluorescence response, while the malonate monoanion induces the opposite turn-on effect.
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Affiliation(s)
| | - Josue Valdes-García
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria México, 04510, CDMX, Mexico
| | - Iván J. Bazany-Rodríguez
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria México, 04510, CDMX, Mexico
| | | | - Alejandro Dorazco-González
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria México, 04510, CDMX, Mexico
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6
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Cruz A, Núñez-Montenegro A, Mateus P, Delgado R. Monitoring inorganic pyrophosphatase activity with the fluorescent dizinc(ii) complex of a macrocycle bearing one dansylamidoethyl antenna. Dalton Trans 2020; 49:9487-9494. [PMID: 32608414 DOI: 10.1039/d0dt01673j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The dizinc(ii) complexes of L were used for the recognition of anions by fluorescence spectroscopy (L is a heteroditopic hexaazamacrocycle with two diethylenetriamine coordination heads with 2-methylpyridyl and dansylamido ethyl arms, and m-xylyl spacers). The protonation of L and stability constants of its zinc(ii) complexes were determined in aqueous solution, at 298.2 ± 0.1 K and I = 0.10 ± 0.01 M in KNO3. At a 2 : 1 Zn2+/L ratio, the dinuclear complexes clearly dominate. The ligand alone does not display fluorescence changes upon increasing the pH value, but in the presence of Zn2+ the emission reaches a maximum at pH ≅ 7.5, at which 95% of the ligand is in the dinuclear complex form. The emission appears concomitantly with the [Zn2H-1L]3+ species formation, which supports that the latter complex corresponds to the metal-promoted deprotonation of dansylamide NH. The [Zn2H-1L]3+ complexes were used for the recognition of phosphate and polyphosphate anions in aqueous solution buffered at pH 7.5 with 2 mM PIPPS, at 298.2 K. The binding of anions causes a decrease of the emission. The association constant determination revealed that HPPi3- is the strongest bound anion (log Kapp = 5.57), followed by HATP3- (two times weaker), and the remaining anions show lower binding constants, with HPO42- having the weakest uptake by the receptor. The observed selectivity of the [Zn2H-1L]3+ receptor for PPi in relation to HPO42-, and the fact that the formation of the [Zn2H-1L]3+ complex is not disturbed by the presence of Mg2+, allowed monitoring of the PPi hydrolysis by using inorganic pyrophosphatase in real-time.
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Affiliation(s)
- Ana Cruz
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal.
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7
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Bartl J, Kubik S. Anion Binding of a Cyclopeptide-Derived Molecular Cage in Aqueous Solvent Mixtures. Chempluschem 2020; 85:963-969. [PMID: 32406613 DOI: 10.1002/cplu.202000255] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/05/2020] [Indexed: 11/06/2022]
Abstract
A molecular cage consisting of two cyclic hexapeptides with an alternating sequence of (2S,4S)-4-aminoproline and 6-aminopicolinic acid subunits, covalently linked via three diglycolic acid subunits, interacts with a variety of inorganic anions in acetonitrile/water. In the respective complexes, the anion resides in a cavity between the two cyclopeptide rings where it interacts with six converging NH groups. The cage binds sulfate anions in acetonitrile/water, 2 : 1 (v/v) with a log Ka of 6.7, ca. 2.5 orders of magnitude stronger than an analogous bis(cyclopeptide) with only one linker whose sulfate affinity log Ka amounts to 4.3. The preorganization induced by the three linking units is thus beneficial for sulfate binding. In addition, these linkers cause the dissociation of the sulfate complex to have a substantial Gibbs free energy of activation ΔG≠ of 68.9 kJ mol-1 and they also seem to affect anion selectivity as illustrated by the different effects some anions produce on the 1 H NMR spectra of the triply and singly-linked bis(cyclopeptides). Such anion binding cages represent promising scaffolds to mimic natural anion receptors such as the sulfate-binding protein.
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Affiliation(s)
- Julia Bartl
- Fachbereich Chemie - Organische Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße, 67663, Kaiserslautern, Germany
| | - Stefan Kubik
- Fachbereich Chemie - Organische Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße, 67663, Kaiserslautern, Germany
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8
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Miljkovic A, La Cognata S, Bergamaschi G, Freccero M, Poggi A, Amendola V. Towards Building Blocks for Supramolecular Architectures Based on Azacryptates. Molecules 2020; 25:molecules25071733. [PMID: 32283788 PMCID: PMC7181268 DOI: 10.3390/molecules25071733] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/03/2020] [Accepted: 04/06/2020] [Indexed: 12/03/2022] Open
Abstract
In this work, we report the synthesis of a new bis(tris(2-aminoethyl)amine) azacryptand L with triphenyl spacers. The binding properties of its dicopper complex for aromatic dicarboxylate anions (as TBA salts) were investigated, with the aim to obtain potential building blocks for supramolecular structures like rotaxanes and pseudo-rotaxanes. As expected, UV-Vis and emission studies of [Cu2L]4+ in water/acetonitrile mixture (pH = 7) showed a high affinity for biphenyl-4,4′-dicarboxylate (dfc2−), with a binding constant of 5.46 log units, due to the best match of the anion bite with the Cu(II)-Cu(II) distance in the cage’s cavity. Compared to other similar bistren cages, the difference of the affinity of [Cu2L]4+ for the tested anions was not so pronounced: conformational changes of L seem to promote a good interaction with both long (e.g., dfc2−) and short anions (e.g., terephthalate). The good affinity of [Cu2L]4+ for these dicarboxylates, together with hydrophobic interactions within the cage’s cavity, may promote the self-assembly of a stable 1:1 complex in water mixture. These results represent a good starting point for the application of these molecular systems as building units for the design of new supramolecular architectures based on non-covalent interactions, which could be of interest in all fields related to supramolecular devices.
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Affiliation(s)
- Ana Miljkovic
- Department of Chemistry, University of Pavia, V.le Taramelli 12, 27100 Pavia, Italy; (A.M.); (M.F.); (A.P.); (V.A.)
| | - Sonia La Cognata
- Department of Chemistry, University of Pavia, V.le Taramelli 12, 27100 Pavia, Italy; (A.M.); (M.F.); (A.P.); (V.A.)
- Correspondence:
| | - Greta Bergamaschi
- Istituto di Scienze e Tecnologie Chimiche, National Research Council of Italy, Via M. Bianco 9, 20131 Milano, Italy;
| | - Mauro Freccero
- Department of Chemistry, University of Pavia, V.le Taramelli 12, 27100 Pavia, Italy; (A.M.); (M.F.); (A.P.); (V.A.)
| | - Antonio Poggi
- Department of Chemistry, University of Pavia, V.le Taramelli 12, 27100 Pavia, Italy; (A.M.); (M.F.); (A.P.); (V.A.)
| | - Valeria Amendola
- Department of Chemistry, University of Pavia, V.le Taramelli 12, 27100 Pavia, Italy; (A.M.); (M.F.); (A.P.); (V.A.)
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9
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Savastano M, Fiaschi M, Ferraro G, Gratteri P, Mariani P, Bianchi A, Bazzicalupi C. Sensing Zn 2+ in Aqueous Solution with a Fluorescent Scorpiand Macrocyclic Ligand Decorated with an Anthracene Bearing Tail. Molecules 2020; 25:E1355. [PMID: 32192025 PMCID: PMC7146481 DOI: 10.3390/molecules25061355] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/13/2020] [Accepted: 03/15/2020] [Indexed: 01/16/2023] Open
Abstract
Synthesis of the new scorpiand ligand L composed of a [9]aneN3 macrocyclic ring bearing a CH2CH2NHCH2-anthracene tail is reported. L forms both cation (Zn2+) and anion (phosphate, benzoate) complexes. In addition, the zinc complexes of L bind these anions. The equilibrium constants for ligand protonation and complex formation were determined in 0.1 M NaCl aqueous solution at 298.1 ± 0.1 K by means of potentiometric (pH-metric) titrations. pH Controlled coordination/detachment of the ligand tail to Zn2+ switch on and off the fluorescence emission from the anthracene fluorophore. Accordingly, L is able to sense Zn2+ in the pH range 6-10 down to nM concentrations of the metal ion. L can efficiently sense Zn2+ even in the presence of large excess of coordinating anions, such as cyanide, sulphide, phosphate and benzoate, despite their ability to bind the metal ion.
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Affiliation(s)
- Matteo Savastano
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Matteo Fiaschi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Giovanni Ferraro
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Paola Gratteri
- Department of NEUROFARBA-Pharmaceutical and Nutraceutical section, and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy;
| | - Palma Mariani
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Antonio Bianchi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Carla Bazzicalupi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
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10
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Homberg A, Lacour J. From reactive carbenes to chiral polyether macrocycles in two steps - synthesis and applications made easy? Chem Sci 2020; 11:6362-6369. [PMID: 34094103 PMCID: PMC8152409 DOI: 10.1039/d0sc01011a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 03/11/2020] [Indexed: 12/26/2022] Open
Abstract
Chiral polyether macrocycles are versatile molecules. For their preparation, original two-step procedures were recently developed and present the advantages of high concentration conditions and simple starting reagents (stable diazo reagents, small cyclic ethers, aliphatic or aromatic amines). Enantiopure materials are readily afforded by CSP-HPLC on a semi-preparative scale. Flexibility and adaptability in the macrocyclic design are provided by a large selection of amines to choose from while the ring size and chemical nature are controlled by the choice of 5 to 7-membered cyclic ether precursors. Such macrocycles have already been used as asymmetric catalysts, mono and ditopic receptors, fluorescent sensors and probes, and chiroptical reversible switches.
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Affiliation(s)
- Alexandre Homberg
- Department of Organic Chemistry, University of Geneva Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Jérôme Lacour
- Department of Organic Chemistry, University of Geneva Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
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11
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Avilés–Moreno JR, Berden G, Oomens J, Martínez–Haya B. A Cl - Hinge for Cyclen Macrocycles: Ionic Interactions and Tweezer-Like Complexes. Front Chem 2019; 7:143. [PMID: 30968013 PMCID: PMC6438891 DOI: 10.3389/fchem.2019.00143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 02/27/2019] [Indexed: 11/25/2022] Open
Abstract
The supramolecular networks derived from the complexation of polyazamacrocycles with halide anions constitute fundamental building blocks of a broad range of modern materials. This study provides insights into the conformational framework that supports the binding of protonated cyclen macrocyles (1,4,7,10-Tetraazacyclododecane) by chloride anions through NHδ+···Cl- interactions. The isolated complex comprised of two cyclen hosts linked by one Cl- anion is characterized by means of infrared action spectroscopy and ion mobility mass spectrometry, in combination with quantum chemical computations. The Cl- anion is found to act as a hinge that bridges the protonatedNH 2 + moieties of the two macrocycles leading to a molecular tweezer configuration. Different types of conformations emerge, depending on whether the trimer adopts an open arrangement, with significant freedom for internal rotation of the cyclen moieties, or it locks in a folded conformation with intermolecular H-bonds between the two cyclen backbones. The ion mobility collision cross section supports that folded configurations of the complex are dominant under isolated conditions in the gas phase. The IRMPD spectroscopy experiments suggest that two qualitatively different families of folded conformations coexist at room temperature, featuring either peripheral or inner positions of the anion with respect to the macrocycle cavities, These findings should have implications in the growth of extended networks in the nanoscale and in sensing applications.
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Affiliation(s)
- Juan Ramón Avilés–Moreno
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Seville, Spain
| | - Giel Berden
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands
| | - Jos Oomens
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands
| | - Bruno Martínez–Haya
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Seville, Spain
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12
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Pitarch-Jarque J, Rissanen K, García-Granda S, Lopera A, Clares MP, García-España E, Blasco S. Water and oxoanion encapsulation chemistry in a 1H-pyrazole azacryptand. NEW J CHEM 2019. [DOI: 10.1039/c9nj05231c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cryptand containing pyrazole spacers displays a very rich host–guest chemistry towards oxoanions.
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Affiliation(s)
| | - Kari Rissanen
- University of Jyväskylä
- Department of Chemistry
- Nanoscience Center
- University of Jyväskylä
- Finland
| | | | - Alberto Lopera
- Instituto de Ciencia Molecular
- Universidad de Valencia
- 46980 Paterna
- Spain
| | - M. Paz Clares
- Instituto de Ciencia Molecular
- Universidad de Valencia
- 46980 Paterna
- Spain
| | | | - Salvador Blasco
- Instituto de Ciencia Molecular
- Universidad de Valencia
- 46980 Paterna
- Spain
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13
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Gerus A, Ślepokura K, Panek J, Turek A, Lisowski J. Chiral Cryptates Derived from a Hexaazamacrocycle. J Org Chem 2018; 83:6748-6753. [PMID: 29774743 DOI: 10.1021/acs.joc.8b00670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The reactions of hexaazamacrocycle 1 with 2,6-bis(bromomethyl)pyridine or 2,6-bis[(tosyloxy)methyl)]pyridine in the presence of appropriate carbonates result in the formation of derivatives of cryptand 6: enantiopure azacryptates of sodium and potassium. Crystal structures of these compounds indicate interaction of a metal ion with four pyridine nitrogen atoms and four tertiary amine atoms. The competition reactions monitored by NMR spectroscopy indicate preferential binding of Na+ over K+ as well as higher affinity of 6 for Na+ in comparison with the [2.2.1] cryptand.
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Affiliation(s)
- Aleksandra Gerus
- Department of Chemistry , University of Wrocław , 14 F. Joliot-Curie , 50-383 Wrocław , Poland
| | - Katarzyna Ślepokura
- Department of Chemistry , University of Wrocław , 14 F. Joliot-Curie , 50-383 Wrocław , Poland
| | - Jarosław Panek
- Department of Chemistry , University of Wrocław , 14 F. Joliot-Curie , 50-383 Wrocław , Poland
| | - Aleksandra Turek
- Department of Chemistry , University of Wrocław , 14 F. Joliot-Curie , 50-383 Wrocław , Poland
| | - Jerzy Lisowski
- Department of Chemistry , University of Wrocław , 14 F. Joliot-Curie , 50-383 Wrocław , Poland
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14
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Mateus P, Wicher B, Ferrand Y, Huc I. Carbohydrate binding through first- and second-sphere coordination within aromatic oligoamide metallofoldamers. Chem Commun (Camb) 2018; 54:5078-5081. [PMID: 29707723 DOI: 10.1039/c8cc02360c] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Aromatic oligoamide capsules that fold upon metal binding recognize carbohydrate guests in solution as evidenced by CD and NMR titrations. Crystallographic data reveal that, besides their structural role, metal ions also contribute to guest recognition through either first- or second-sphere coordination.
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Affiliation(s)
- Pedro Mateus
- Université de Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), IECB, 2 rue Robert Escarpit, F-33600 Pessac, France.
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15
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Savastano M, Bazzicalupi C, García-Gallarín C, Giorgi C, López de la Torre MD, Pichierri F, Bianchi A, Melguizo M. Halide and hydroxide anion binding in water. Dalton Trans 2018; 47:3329-3338. [PMID: 29423483 DOI: 10.1039/c7dt04430e] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The formation of halide and hydroxide anion complexes with two ligands L1 (3,6-bis(morpholin-4-ylmethyl)-1,2,4,5-tetrazine) and L2 (3,6-bis(morpholin-4-ylethyl)-1,2,4,5-tetrazine) was studied in aqueous solution, by means of potentiometric and ITC procedures. In the solid state, HF2-, Cl- and Br- complexes of H2L22+ were analysed by single crystal XRD measurements. Further information on the latter was obtained with the use of density functional theory (DFT) calculations in combination with the polarizable continuum model (PCM). The presence of two halide or bifluoride HF2- (F-H-F-) anions forming anion-π interactions, respectively above and below the ligand tetrazine ring, is the leitmotiv of the [(H2L2)X2] (X = HF2, Cl, Br, I) complexes in the solid state, while hydrogen bonding between the anions and protonated morpholine ligand groups contributes to strengthen the anion-ligand interaction, in particular in the case of Cl- and Br-. In contrast to the solid state, only the anion : ligand complexes of 1 : 1 stoichiometry were found in solution. The stability of these complexes displays the peculiar trend I- > F- > Br- > Cl- which was rationalized in terms of electrostatic, hydrogen bond, anion-π interactions and solvent effects. DFT calculations performed on [(H2L2)X]+ (X = F, Cl, Br, I) in PCM water suggested that the ligand assumes a U-shaped conformation to form one anion-π and two salt bridge interactions with the included anions and furnished structural information to interpret the solvation effects affecting complex formation. The formation of hydroxide anion complexes with neutral (not protonated) L1 and L2 molecules represents an unprecedented case in water. The stability of the [L(OH)]- (L = L1, L2) complexes is comparable to or higher than the stability of halide complexes with protonated ligand molecules, their formation being promoted by largely favourable enthalpic contributions that prevail over unfavourable entropic changes.
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Affiliation(s)
- M Savastano
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy.
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16
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Network Formation via Anion Coordination: Crystal Structures Based on the Interplay of Non-Covalent Interactions. Molecules 2018; 23:molecules23030572. [PMID: 29510481 PMCID: PMC6017772 DOI: 10.3390/molecules23030572] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 02/24/2018] [Accepted: 02/27/2018] [Indexed: 12/31/2022] Open
Abstract
We describe the synthesis and the structural characterization of new H2L(CF3CO2)2 (1) and H2L(Ph2PO4)2 (2) compounds containing the diprotonated form (H2L2+) of the tetrazine-based molecule 3,6-di(pyridin-4-yl)-1,2,4,5-tetrazine. X-ray diffraction (XRD) analysis of single crystals of these compounds showed that H2L2+ displays similar binding properties toward both anions when salt bridge interactions are taken into account. Nevertheless, the different shapes, sizes and functionalities of trifluoroacetate and diphenyl phosphate anions define quite different organization patterns leading to the peculiar crystal lattices of 1 and 2. These three-dimensional (3D) architectures are self-assembled by a variety of non-covalent forces, among which prominent roles are played by fluorine–π (in 1) and anion–π (in 2) interactions.
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17
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Savastano M, Bazzicalupi C, García C, Gellini C, López de la Torre MD, Mariani P, Pichierri F, Bianchi A, Melguizo M. Iodide and triiodide anion complexes involving anion-π interactions with a tetrazine-based receptor. Dalton Trans 2018; 46:4518-4529. [PMID: 28262880 DOI: 10.1039/c7dt00134g] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Protonated forms of the tetrazine ligand L2 (3,6-bis(morpholin-4-ylethyl)-1,2,4,5-tetrazine) interact with iodide in aqueous solution forming relatively stable complexes (ΔG° = -11.6(4) kJ mol-1 for HL2+ + I- = (HL2)I and ΔG° = -13.4(2) kJ mol-1 for H2L22+ + I- = [(H2L2)I]+). When solutions of [(H2L2)I]+ are left in contact with air, crystals of the oxidation product (H2L2)2(I3)3I·4H2O are formed. Unfortunately, the low solubility of I3- complexes prevents the determination of their stability constants. The crystal structures of H2L2I2·H2O (1), H2L2(I3)2·2H2O (2) and (H2L2)2(I3)3I·4H2O (3) were determined by means of X-ray diffraction analyses. In all crystal structures, it was found that the interaction between I- and I3- with H2L22+ is dominated by anion interactions with the π electron density of the receptor. Only in the case of 1, the iodide anions involved in close anion-π interactions with the ligand tetrazine ring form an additional H-bond with the protonated morpholine nitrogen of an adjacent ligand molecule. Conversely, in crystals of 2 and 3 there are alternate segregated planes which contain only protonated ligands hydrogen-bonded to cocrystallized water molecules or I3- and I- forming infinite two-dimensional networks established through short interhalogen contacts, making these crystalline products good candidates to behave as solid conductors. In the solid complexes, the triiodide anion displays both end-on and side-on interaction modes with the tetrazine ring, in agreement with density functional theory calculations indicating a preference for the alignment of the I3- molecular axis with the molecular axis of the ligand. Further information about geometries and structures of triiodide anions in 2 and 3 was acquired by the analysis of their Raman spectra.
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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.
| | - Celeste García
- Department of Inorganic and Organic Chemistry, University of Jaén 23071, Jaén, Spain.
| | - Cristina Gellini
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy.
| | | | - Palma Mariani
- 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, Sendai 980-8579, 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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18
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Savastano M, García C, López de la Torre MD, Pichierri F, Bazzicalupi C, Bianchi A, Melguizo M. Interplay between salt bridge, hydrogen bond and anion-π interactions in thiocyanate binding. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.04.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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19
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Savastano M, Bazzicalupi C, Giorgi C, Gratteri P, Bianchi A. Cation, Anion and Ion-Pair Complexes with a G-3 Poly(ethylene imine) Dendrimer in Aqueous Solution. Molecules 2017; 22:molecules22050816. [PMID: 28509862 PMCID: PMC6154109 DOI: 10.3390/molecules22050816] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 05/12/2017] [Accepted: 05/12/2017] [Indexed: 11/16/2022] Open
Abstract
The G-3 poly(ethylene imine) ligand L2 shows a multifaceted coordination ability, being able to bind metal cations, anions and ion-pairs. The equilibrium constants for the formation of metal (Cu2+, Zn2+), anion (SO₄2-) and ion-pair (Cu2+/SO₄2-) complexes were determined in 0.1 M Me₄NCl aqueous solution at 298.1 ± 0.1 K by means of potentiometric titrations. Thanks to its dendrimeric nature, L2 can form highly nucleated metal complexes, such as Cu₅L210+ and Zn₄L28+, in successive and well-defined complexation steps. Protonated forms of L2 give rise to relatively weak anion complexes with SO₄2-, but the addition of Cu2+ significantly enhances the binding ability of the ligand toward this anion below pH 9. In more alkaline solutions, an opposite trend is observed. The coordination properties of L2 are discussed with the support of modelling calculations. According to results, L2 is a promising molecule for the preparation of solid supported materials for the recovery of cations and anions from aqueous media and/or for applications in heterogeneous catalysis.
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Affiliation(s)
- Matteo Savastano
- Department of Chemistry "Ugo Schiff", via della Lastruccia 3, 50019 Sesto Fiorentino, Italy.
| | - Carla Bazzicalupi
- Department of Chemistry "Ugo Schiff", via della Lastruccia 3, 50019 Sesto Fiorentino, Italy.
| | - Claudia Giorgi
- Department of Chemistry "Ugo Schiff", via della Lastruccia 3, 50019 Sesto Fiorentino, Italy.
| | - Paola Gratteri
- NEUROFARBA Department, Pharmaceutical and Nutraceutical Section, and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy.
| | - Antonio Bianchi
- Department of Chemistry "Ugo Schiff", via della Lastruccia 3, 50019 Sesto Fiorentino, Italy.
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20
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Gholiee Y, Salehzadeh S. Theoretical study on steric effects, electronic properties, preorganization and solvent effect in host–guest chemistry of hexaprotonated form of an azacyclophane and halide anions. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-016-1044-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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21
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Avilés-Moreno JR, Berden G, Oomens J, Martínez-Haya B. Benchmark Ditopic Binding of Cl−
and Cs+
by the Macrocycle Hexacyclen. Chemphyschem 2017; 18:1324-1332. [DOI: 10.1002/cphc.201700091] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 02/17/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Juan Ramón Avilés-Moreno
- Department of Physical, Chemical and Natural Systems; Universidad Pablo de Olavide; 41013 Seville Spain
| | - Giel Berden
- Institute for Molecules and Materials; FELIX Laboratory; Radboud University; Toernooiveld 7c 6525 ED Nijmegen The Netherlands
| | - Jos Oomens
- Institute for Molecules and Materials; FELIX Laboratory; Radboud University; Toernooiveld 7c 6525 ED Nijmegen The Netherlands
| | - Bruno Martínez-Haya
- Department of Physical, Chemical and Natural Systems; Universidad Pablo de Olavide; 41013 Seville Spain
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22
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Luo YH, Wang JW, Li YJ, Chen C, An PJ, Wang SL, You CQ, Sun BW. Selective separation of aqueous sulphate anions via crystallization of sulphate–water clusters. CrystEngComm 2017. [DOI: 10.1039/c7ce00693d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Fraschetti C, Filippi A, Crestoni ME, Marcantoni E, Glucini M, Guarcini L, Montagna M, Guidoni L, Speranza M. Contact Ion Pairs on a Protonated Azamacrocycle: the Role of the Anion Basicity. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2016; 27:615-621. [PMID: 26744294 DOI: 10.1007/s13361-015-1327-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 12/14/2015] [Accepted: 12/16/2015] [Indexed: 06/05/2023]
Abstract
A potassium-containing hexaazamacrocyclic dication, [M•H•K](2+), is able to add in the gas phase mono- and dicarboxylate anions as well as inorganic anions by forming the corresponding monocharged adducts, the structure of which markedly depends on the basicity of the anion. With anions, such as acetate or fluoride, the neutral hexaazamacrocycle M acts as an acceptor of monosolvated K(+) ion. With less basic anions, such as trifluoroacetate or chloride, the protonated hexaazamacrocycle [M•H](+) performs the unusual functions of an acceptor of contact K(+)/anion pairs. Graphical Abstract ᅟ.
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Affiliation(s)
- Caterina Fraschetti
- Dipartimento di Chimica e Tecnologie del Farmaco, Università La Sapienza, Rome, Italy
| | - Antonello Filippi
- Dipartimento di Chimica e Tecnologie del Farmaco, Università La Sapienza, Rome, Italy
| | - Maria Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco, Università La Sapienza, Rome, Italy
| | - Enrico Marcantoni
- Scuola di Scienze e Tecnologie, Divisione Chimica, Università di Camerino, 62032, Camerino (MC), Italy
| | - Marco Glucini
- Scuola di Scienze e Tecnologie, Divisione Chimica, Università di Camerino, 62032, Camerino (MC), Italy
| | - Laura Guarcini
- Dipartimento di Chimica e Tecnologie del Farmaco, Università La Sapienza, Rome, Italy
| | - Maria Montagna
- Dipartimento di Chimica e Tecnologie del Farmaco, Università La Sapienza, Rome, Italy
| | - Leonardo Guidoni
- Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi de L'Aquila, 67100, L'Aquila, Italy
| | - Maurizio Speranza
- Dipartimento di Chimica e Tecnologie del Farmaco, Università La Sapienza, Rome, Italy.
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24
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Mesquita LM, Herrera F, Esteves CV, Lamosa P, André V, Mateus P, Delgado R. Inhibition of the STAT3 Protein by a Dinuclear Macrocyclic Complex. Inorg Chem 2016; 55:3589-98. [PMID: 26999534 DOI: 10.1021/acs.inorgchem.6b00116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A new diethylenetriamine-derived macrocycle bearing 2-methylpyridyl arms and containing m-xylyl spacers, L, was prepared, and its dinuclear copper(II) and zinc(II) complexes were used as receptors for the recognition in aqueous solution of a phosphorylated peptide derived from a sequence of the STAT3 protein. A detailed study of the acid-base behavior of L and of its complexation properties as well as of the association of the phosphorylated peptide to the receptor was carried out by potentiometry in aqueous solution at 298.2 K and I = 0.10 M in KNO3. The data revealed that the receptor forms stable associations with several protonated forms of the substrate, with constant values ranging from 3.32 to 4.25 log units. The affinity of the receptor for the phosphorylated substrate studied is higher at a pH value where the receptor is mainly in the [Cu2L](4+) form and the pY residue of the substrate is in the dianionic form (pH 6.55). These results, also supported by (31)P NMR studies, showed that the phosphopeptide is bound through the phosphoryl group in a bridging mode. Additionally, the receptor inhibited binding between active (phosphorylated) STAT3 and its target DNA sequence in a dose-dependent manner (IC50 63 ± 3.4 μM) in human nuclear extracts in vitro. Treatment of whole cells with the inhibitor revealed that it is bioactive in living cells and has oncostatic properties that could be interesting for the fight against cancer and other pathologies involving the STAT3 protein.
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Affiliation(s)
- Lígia M Mesquita
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , Avenida da República, 2780-157 Oeiras, Portugal
| | - Federico Herrera
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , Avenida da República, 2780-157 Oeiras, Portugal
| | - Catarina V Esteves
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , Avenida da República, 2780-157 Oeiras, Portugal
| | - Pedro Lamosa
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , Avenida da República, 2780-157 Oeiras, Portugal
| | - Vânia André
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa , Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Pedro Mateus
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , Avenida da República, 2780-157 Oeiras, Portugal
| | - Rita Delgado
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , Avenida da República, 2780-157 Oeiras, Portugal
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25
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Bartoli F, Bencini A, Conti L, Giorgi C, Valtancoli B, Paoli P, Rossi P, Le Bris N, Tripier R. Catching anions with coloured assemblies: binding of pH indicators by a giant-size polyammonium macrocycle for anion naked-eye recognition. Org Biomol Chem 2016; 14:8309-21. [DOI: 10.1039/c6ob01474g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Among inorganic anions, only triphosphate displaces bromocresol purple from its assembly with a tetra-cyclam macrocycle, allowing for its selective colorimetric detection.
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Affiliation(s)
- Francesco Bartoli
- Dipartimento di Chimica ‘Ugo Schiff’
- Università degli Studi di Firenze
- Sesto Fiorentino
- Italy
| | - Andrea Bencini
- Dipartimento di Chimica ‘Ugo Schiff’
- Università degli Studi di Firenze
- Sesto Fiorentino
- Italy
| | - Luca Conti
- Dipartimento di Chimica ‘Ugo Schiff’
- Università degli Studi di Firenze
- Sesto Fiorentino
- Italy
| | - Claudia Giorgi
- Dipartimento di Chimica ‘Ugo Schiff’
- Università degli Studi di Firenze
- Sesto Fiorentino
- Italy
| | - Barbara Valtancoli
- Dipartimento di Chimica ‘Ugo Schiff’
- Università degli Studi di Firenze
- Sesto Fiorentino
- Italy
| | - Paola Paoli
- Dipartimento di Ingegneria Industriale
- Università degli Studi di Firenze
- Firenze
- Italy
| | - Patrizia Rossi
- Dipartimento di Ingegneria Industriale
- Università degli Studi di Firenze
- Firenze
- Italy
| | - Nathalie Le Bris
- UMR-CNRS 6521
- UFR des Sciences et Techniques
- 6 avenue Victor le Gorgeu
- C.S. 93837
- Université de Bretagne Occidentale
| | - Raphael Tripier
- UMR-CNRS 6521
- UFR des Sciences et Techniques
- 6 avenue Victor le Gorgeu
- C.S. 93837
- Université de Bretagne Occidentale
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26
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Chen S, Ni XL. Development of an AIE based fluorescent probe for the detection of nitrate anions in aqueous solution over a wide pH range. RSC Adv 2016. [DOI: 10.1039/c5ra23369k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new type of AIE-based turn-on fluorescent probe 1 was reported to highly selective detection of NO3− anion in aqueous solution and living cells by virtue of ionic interaction.
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Affiliation(s)
- Shiyan Chen
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang 550025
- China
| | - Xin-Long Ni
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang 550025
- China
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27
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Alibrandi G, Amendola V, Bergamaschi G, Fabbrizzi L, Licchelli M. Bistren cryptands and cryptates: versatile receptors for anion inclusion and recognition in water. Org Biomol Chem 2015; 13:3510-24. [PMID: 25645726 DOI: 10.1039/c4ob02618g] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Bistren cryptands can be easily synthesised through the Schiff base condensation of two molecules of tren and three molecules of a dialdehyde, followed by hydrogenation of the six C=N double bonds to give octamine cages, whose ellipsoidal cavity can be varied at will, by choosing the appropriate dialdehyde, in order to include substrates of varying sizes and shapes. Bistrens can operate as effective anion receptors in two ways: (i) in their protonated form, providing six secondary ammonium groups capable of establishing hydrogen bonding interactions with the anion; (ii) as dicopper(II) cryptates, in which the two coordinatively unsaturated metal centres can be bridged by an ambidentate anion. Representative examples of the two approaches, as well as the design of an anion molecular dispenser, in which a dicopper(II) bistren cryptate acts as a bottle will be illustrated.
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Affiliation(s)
- Giuseppe Alibrandi
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres 31, Villaggio S. Agata, 98166 Messina, Italy
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Mateus P, Delgado R, André V, Teresa Duarte M. Sulfate recognition by a hexaaza cryptand receptor. Org Biomol Chem 2015; 13:834-42. [PMID: 25407639 DOI: 10.1039/c4ob02027h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A hexamine macrobicycle with pyrrolyl spacers was evaluated as an anion receptor in its protonated forms. The protonation constants of the receptor, as well as its association constants with Cl(-), NO3(-), AcO(-), ClO4(-), H2PO4(-), and SO4(2-) were determined by potentiometry at 298.2 ± 0.1 K in H2O-MeOH (50 : 50 v/v) and at an ionic strength of 0.10 ± 0.01 M in KTsO. These studies revealed that the Hnpyrr(n+) receptor has a very high effective association constant value for the SO4(2-) at pH 4.0 (log Keff = 6.42), and it is selective for the uptake of this anion in the presence of the other studied anionic substrates. In particular, the receptor showed very high SO4(2-)/NO3(-) selectivity. Using the indicator-displacement approach the receptor is able to signal the presence of sulfate by a change of color. Single crystal X-ray diffraction determination of [(H6pyrr)(SO4)(H2O)3](SO4)2·9.3H2O revealed the presence of one sulfate anion inside the receptor cavity and showed that the encapsulation of the anion is favored by an array of nine hydrogen bonding interactions, including N-HO, C-HO and water-mediated ones.
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Affiliation(s)
- Pedro Mateus
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal.
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29
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30
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Yang Y, Chen S, Ni XL. Anion Recognition Triggered Nanoribbon-Like Self-Assembly: A Fluorescent Chemosensor for Nitrate in Acidic Aqueous Solution and Living Cells. Anal Chem 2015; 87:7461-6. [DOI: 10.1021/acs.analchem.5b01774] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yaping Yang
- Key Laboratory of Macrocyclic
and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, Guizhou 550025, China
| | - Shiyan Chen
- Key Laboratory of Macrocyclic
and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, Guizhou 550025, China
| | - Xin-Long Ni
- Key Laboratory of Macrocyclic
and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, Guizhou 550025, China
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31
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KHAKHLARY PRITHIVIRAJ, BARUAH JUBARAJB. Anion-π interactions in layered structures of salts of 5-(hydroxyimino) quinolin-8-one and related salts. J CHEM SCI 2015. [DOI: 10.1007/s12039-014-0753-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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32
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Torres J, Giorgi C, Veiga N, Kremer C, Bianchi A. Interaction of myo-inositol hexakisphosphate with biogenic and synthetic polyamines. Org Biomol Chem 2015; 13:7500-12. [DOI: 10.1039/c5ob00900f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
myo-Inositol hexakisphosphate (phytate) forms very stable adducts with biogenic and synthetic polyamines in aqueous solution.
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Affiliation(s)
- Julia Torres
- Cátedra de Química Inorgánica
- Departamento Estrella Campos
- Facultad de Química
- Universidad de la República
- Montevideo
| | - Claudia Giorgi
- Department of Chemistry “Ugo Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
| | - Nicolás Veiga
- Cátedra de Química Inorgánica
- Departamento Estrella Campos
- Facultad de Química
- Universidad de la República
- Montevideo
| | - Carlos Kremer
- Cátedra de Química Inorgánica
- Departamento Estrella Campos
- Facultad de Química
- Universidad de la República
- Montevideo
| | - Antonio Bianchi
- Department of Chemistry “Ugo Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
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Boiocchi M, Licchelli M, Milani M, Poggi A, Sacchi D. Oxo-Anion Recognition by Mono- and Bisurea Pendant-Arm Macrocyclic Complexes. Inorg Chem 2014; 54:47-58. [DOI: 10.1021/ic501527k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Massimo Boiocchi
- Centro Grandi Strumenti and ‡Dipartimento di Chimica, Università di Pavia, via T. Taramelli 12, 27100 Pavia, Italy
| | - Maurizio Licchelli
- Centro Grandi Strumenti and ‡Dipartimento di Chimica, Università di Pavia, via T. Taramelli 12, 27100 Pavia, Italy
| | - Michele Milani
- Centro Grandi Strumenti and ‡Dipartimento di Chimica, Università di Pavia, via T. Taramelli 12, 27100 Pavia, Italy
| | - Antonio Poggi
- Centro Grandi Strumenti and ‡Dipartimento di Chimica, Università di Pavia, via T. Taramelli 12, 27100 Pavia, Italy
| | - Donatella Sacchi
- Centro Grandi Strumenti and ‡Dipartimento di Chimica, Università di Pavia, via T. Taramelli 12, 27100 Pavia, Italy
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34
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Bonaccorso C, Brancatelli G, Forte G, Arena G, Geremia S, Sciotto D, Sgarlata C. Factors driving the self-assembly of water-soluble calix[4]arene and gemini guests: a combined solution, computational and solid-state study. RSC Adv 2014. [DOI: 10.1039/c4ra09353d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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35
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del Rosso MG, Ciesielski A, Colella S, Harrowfield JM, Samorì P. Isothermal titration calorimetry study of a bistable supramolecular system: reversible complexation of cryptand[2.2.2] with potassium ions. Chemphyschem 2014; 15:2743-8. [PMID: 24986754 DOI: 10.1002/cphc.201402296] [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: 05/03/2014] [Indexed: 11/11/2022]
Abstract
Isothermal titration calorimetry (ITC) is used to investigate the thermodynamics of the complexation of potassium ions by 1,10-diaza-4,7,13,16,21,24-hexaoxabicyclo[8.8.8]hexacosane (cryptand[2.2.2]) in aqueous solution. By changing the pH of the solution it was possible to trigger the reversible complexation/decomplexation of the cryptand in consecutive in situ experiments and to assess for the first time the use of ITC to monitor the thermodynamics of a bistable system.
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Affiliation(s)
- Maria G del Rosso
- ISIS & icFRC, Université de Strasbourg & CNRS, 8 allée Gaspard Monge, 67000 Strasbourg (France)
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36
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37
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Gago S, González J, Blasco S, Parola AJ, Albelda MT, García-España E, Pina F. Protonation, coordination chemistry, cyanometallate “supercomplex” formation and fluorescence chemosensing properties of a bis(2,2′-bipyridino)cyclophane receptor. Dalton Trans 2014; 43:2437-47. [DOI: 10.1039/c3dt52061g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Bergamaschi G, Boiocchi M, Perrone ML, Poggi A, Viviani I, Amendola V. Mixing the spacers in azacryptands: effects on halide recognition. Dalton Trans 2014; 43:11352-60. [DOI: 10.1039/c4dt00886c] [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
Replacement of just one spacer in dicopper cryptates drastically alters the cavity's shape, thus affecting halide recognition.
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Affiliation(s)
| | | | | | - Antonio Poggi
- Dipartimento di Chimica
- Università di Pavia
- Pavia, Italy
| | - Ivan Viviani
- Dipartimento di Chimica
- Università di Pavia
- Pavia, Italy
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39
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Šumanovac Ramljak T, Despotović I, Bertoša B, Mlinarić-Majerski K. Synthesis and alkali metal complexation studies of novel cage-functionalized cryptands. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.10.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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40
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Salehzadeh S, Bayat M, Gholiee Y. A theoretical study on the importance of steric effects, electronic properties, interaction and solvation energies in the ‘host–guest’ chemistry of protonated azacryptands and halide anions. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.08.064] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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41
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Aboubakr H, Brisset H, Siri O, Raimundo JM. Highly specific and reversible fluoride sensor based on an organic semiconductor. Anal Chem 2013; 85:9968-74. [PMID: 24047448 DOI: 10.1021/ac4027934] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel sulfonamide-conjugated benzo-[2,1-b:3,4-b']bithiophene semiconductor has been designed and synthetized in order to develop a probe for specific detection of anions both in the homogeneous (solution) and heterogeneous phase. Its photophysical and electrochemical data were reported in this study. On the basis of the optical and NMR titrations analysis, the chelator was found to be highly selective for fluoride compared to others anions (Ka = 1.6 × 10(4) M(-1) in dimethyl sulfoxide (DMSO)). In addition, from an intricate sample, the novel chelator shows exceptional specificity toward fluoride and reveals a complete reversibility after addition of trifluoroacetic acid (TFA). Sensing films were obtained by electrochemical polymerization of the probe on an electrode surface, which clearly show effective detection of fluoride.
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Affiliation(s)
- Hecham Aboubakr
- Centre Interdisciplinaire de Nanoscience de Marseille (CINaM-UMR CNRS 7325), Aix-Marseille Université , 163 Ave de Luminy Case 913, 13288 Marseille Cedex 09, France
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42
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Puccioni S, Bazzicalupi C, Bencini A, Giorgi C, Valtancoli B, De Filippo G, Lippolis V, Salvi PR, Pietraperzia G, Chelli R, Gellini C. Tuning the Emission Properties of Fluorescent Ligands by Changing pH: The Unusual Case of an Acridine-Containing Polyamine Macrocycle. J Phys Chem A 2013; 117:3798-808. [DOI: 10.1021/jp4015756] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefano Puccioni
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Carla Bazzicalupi
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Andrea Bencini
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Claudia Giorgi
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Barbara Valtancoli
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Greta De Filippo
- Dipartimento di Scienze Chimiche
e Geologiche, Università di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy
| | - Vito Lippolis
- Dipartimento di Scienze Chimiche
e Geologiche, Università di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy
| | - Pier Remigio Salvi
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
- European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara
1, 50019 Sesto Fiorentino, Firenze, Italy
| | - Giangaetano Pietraperzia
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
- European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara
1, 50019 Sesto Fiorentino, Firenze, Italy
| | - Riccardo Chelli
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
- European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara
1, 50019 Sesto Fiorentino, Firenze, Italy
| | - Cristina Gellini
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
- European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara
1, 50019 Sesto Fiorentino, Firenze, Italy
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43
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Pouessel J, Abada S, Le Bris N, Elhabiri M, Charbonnière LJ, Tripier R. A new bis-tetraamine ligand with a chromophoric 4-(9-anthracenyl)-2,6-dimethylpyridinyl linker for glyphosate and ATP sensing. Dalton Trans 2013; 42:4859-72. [PMID: 23370614 DOI: 10.1039/c3dt32325k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a new linear bis-tetraamine ligand L1, based on two 1,4,8,11-tetraazaundecane units grafted at the 2 and 6 positions of a pyridinyl linker substituted by an anthracenyl fluorophore in the para position, is described and anion complexation studies of L1 with anionic substrates are reported. The protonation pattern and the study of the binding properties of L1 in an aqueous medium with two anionic substrates, the nucleotide adenosine triphosphate (ATP) and the herbicide glyphosate (N-(phosphonomethyl)glycine, PMG), were investigated by means of potentiometry, NMR spectroscopy and absorption and emission spectroscopic techniques. To decipher the impact of the chromophoric linker on the complexation process and to highlight its optical properties, a comparison is established with its previously reported analog L2 devoid of the anthracenyl group. The results unambiguously show that the protonation and complexation properties are preserved despite the presence of the bulky linker, allowing for the use of L1 as a fluorescent sensor for ATP and PMG.
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Affiliation(s)
- Jacky Pouessel
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, UMR 6521 CNRS/Université de Bretagne Occidentale, 6 Avenue Victor Le Gorgeu, 29238 Brest Cedex 3, France
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Di- and trinuclear copper(II) complexes of polyaza macrocycles and cryptands as anion receptors. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.07.073] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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45
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Alberti G, Amendola V, Bergamaschi G, Colleoni R, Milanese C, Biesuz R. Supramolecular receptors in solid phase: developing sensors for anionic radionuclides. Dalton Trans 2013; 42:6227-34. [DOI: 10.1039/c2dt32211k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Nath JK, Baruah JB. Water assisted anion chains and anion dependent fluorescence emission in salts of N,N′-bis(3-imidazol-1-ylpropyl)naphthalenediimide. NEW J CHEM 2013. [DOI: 10.1039/c3nj00034f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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47
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Bazzicalupi C, Bianchi A, Giorgi C, Gratteri P, Mariani P, Valtancoli B. Anion and ion-pair binding by a G-2 poly(ethylene imine) dendrimer. Dalton Trans 2013; 42:12130-8. [DOI: 10.1039/c3dt32926g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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48
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Vacca A, Francesconi O, Roelens S. BC(50): a generalized, unifying affinity descriptor. CHEM REC 2012; 12:544-66. [PMID: 23001996 DOI: 10.1002/tcr.201200014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Indexed: 11/10/2022]
Abstract
Assessing binding affinities is an unavoidable step that we come across any time interactions between binding species are investigated. A quantitative evaluation of binding affinities relies on the determination of binding constants but, whilst the binding constant fully defines the affinity of a reagent for a ligand when only one complex species is formed, the same is not true when the interacting partners form more than one complex of different stoichiometry, because all complexes contribute to the overall binding affinity. Unfortunately, this situation is the rule rather than the exception in chemical systems, but a generally accepted solution for this issue has not yet been settled. In this Personal Account, we describe the evolution, from the initial idea to a fully developed stage, of a binding descriptor that has been developed with the aim of filling this gap, thereby providing scientists in all fields of chemistry with a unifying tool for the assessment of binding affinities based on the knowledge of the binding constants in systems that involve any number of complex species.
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Affiliation(s)
- Alberto Vacca
- Dipartimento di Chimica, Università di Firenze, Polo Scientifico e Tecnologico, I-50019 Sesto Fiorentino, Firenze, Italy
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49
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Pouessel J, Le Bris N, Bencini A, Giorgi C, Valtancoli B, Tripier R. Glyphosate and ATP binding by mononuclear Zn(II) complexes with non-symmetric ditopic polyamine ligands. Dalton Trans 2012; 41:10521-32. [PMID: 22785253 DOI: 10.1039/c2dt31110k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Binding of Zn(II) by the ditopic ligands L1py, L2py and L1para, composed of a cyclam unit linked to the linear polyamines 1,4,8,11-tetraazaundecane (L1py and L2para) and 1,4,7-triazaheptane (L2py) via a 2,6-dimethylpyridinyl (L1py and L2py) or a 1,4-dimethylbenzyl spacer (L2para), has been analyzed by means of potentiometric and (1)H and (13)C NMR measurements. All ligands form stable mononuclear Zn(II) complexes in a wide pH range, featuring the metal ion bound to the macrocyclic unit. The open-chain polyamine unit can easily bind several protons in aqueous solution affording protonated metal complexes at neutral and acidic pH values. These complexes behave as bifunctional receptors for the anionic substrates N-(phosphonomethyl)glycine (glyphosate or PMG) and ATP. Potentiometric, (1)H and (31)P NMR measurements show that the Zn(II) complex with L1py is the better receptor for both substrates, thanks to the simultaneous presence of a pyridine linker functionalized at its 2,6 positions and of a flexible linear tetraamine chain. In fact, these structural features allow a stronger interaction of PMG and ATP with both the protonated tetraamine moiety and the Zn(II)-cyclam core.
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Affiliation(s)
- Jacky Pouessel
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France
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50
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Zhang LJ, Chen HL, Li ZF, Lu ZL, Wang R. Click-reaction generated [12]aneN3-based fluorescent sensor for Zn(II) ions. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.06.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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