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Satriano C, Forte G, Magrì A, Di Pietro P, Travaglia A, Pandini G, Gianì F, La Mendola D. Neurotrophin-mimicking peptides at the biointerface with gold respond to copper ion stimuli. Phys Chem Chem Phys 2018; 18:30595-30604. [PMID: 27786317 DOI: 10.1039/c6cp05476e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The peptide fragments NGF1-14 and BDNF1-12, encompassing the N-terminal domains, respectively, of the proteins nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) were used in this study for the fabrication of a hybrid gold/peptide biointerface. These peptides mimic the Trk receptor activation of the respective whole protein - with a crucial role played by copper ions - and exhibit, in bulk solution, a pH-dependent capability to complex copper. We demonstrate here the maintenance of peptide-specific responses at different pH values as well as the copper binding also for the adlayers formed upon physisorption at the gold surface. The physicochemical properties, including viscoelastic behavior of the adlayer and competitive vs. synergic interactions in sequential adsorption processes, were addressed both experimentally, by quartz crystal microbalance with dissipation monitoring (QCM-D) and circular dichroism (CD), and theoretically, by molecular dynamics (MD) calculations. Proof-of work biological assays with the neuroblastoma SY-SH5H cell line demonstrated that the developed hybrid Au/peptide nanoplatforms are very promising for implementation in pH- and metal-responsive systems for application in nanomedicine.
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Affiliation(s)
- C Satriano
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria, 6, I-95125 Catania, Italy.
| | - G Forte
- Department of Pharmaceutical Sciences, University of Catania, Viale Andrea Doria, 6, I-95125 Catania, Italy
| | - A Magrì
- Institute of Biostructures and Bioimages - Catania, National Council of Research (IBB-CNR), Via Paolo Gaifami, 16, I-95125 Catania, Italy
| | - P Di Pietro
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria, 6, I-95125 Catania, Italy.
| | - A Travaglia
- Centre for Neural Science, New York University, Washington Place, 4, New York, NY 10003, USA
| | - G Pandini
- Endocrinology, Department of Clinical and Experimental Medicine, Garibaldi-Nesima Medical Center, University of Catania, via Palermo n. 636, 95122 Catania, Italy
| | - F Gianì
- Endocrinology, Department of Clinical and Experimental Medicine, Garibaldi-Nesima Medical Center, University of Catania, via Palermo n. 636, 95122 Catania, Italy
| | - D La Mendola
- Department of Pharmacy, University of Pisa, via Bonanno Pisano, 6, I-56100 Pisa, Italy.
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Sivaraman G, Iniya M, Anand T, Kotla NG, Sunnapu O, Singaravadivel S, Gulyani A, Chellappa D. Chemically diverse small molecule fluorescent chemosensors for copper ion. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.11.020] [Citation(s) in RCA: 189] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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53
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Khan TA, Sheoran M, Nikhil Raj M V, Jain S, Gupta D, Naik SG. Screening of biologically important Zn 2+ by a chemosensor with fluorescent turn on-off mechanism. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 189:176-182. [PMID: 28818764 DOI: 10.1016/j.saa.2017.08.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 08/07/2017] [Indexed: 06/07/2023]
Abstract
Reported herein the synthesis, characterization and biologically important zinc ion binding propensity of a weakly fluorescent chemosensor, 4-methyl-2,6-bis((E)-(2-(4-phenylthiazol-2-yl)hydrazono)methyl)phenol (1). 1H NMR spectroscopic titration experiment reveals the binding knack of 1 to the essential Zn2+. The photo-physical studies of 1 exhibit an enhancement in the fluorescence by several folds upon binding with the zinc ions attributed to PET-off process, with a binding constant value of 5.22×103M-1. 1 exhibits an excellent detection range for Zn2+ with lower detection limit value of 2.31×10-8M. The selectivity of 1 was studied with various mono and divalent metal cations and it was observed that most cations either quenches the fluorescence or remains unchanged except for Cd2+, which shows a slight enhancement in fluorescence intensity of 1. The ratiometric displacement of Cd2+ ions by Zn2+ ions shows an excellent selectivity towards in-situ detection of Zn2+ ions. Photo-physical studies also support the reversible binding of 1 to Zn2+ ions having on and off mechanism in presence of EDTA. Such recognition of the biologically important zinc ions finds potential application in live cell imaging.
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Affiliation(s)
- Tanveer A Khan
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer Distt., Rajasthan 305817, India.
| | - Monika Sheoran
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer Distt., Rajasthan 305817, India
| | - Venkata Nikhil Raj M
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer Distt., Rajasthan 305817, India
| | - Surbhi Jain
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer Distt., Rajasthan 305817, India
| | - Diksha Gupta
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer Distt., Rajasthan 305817, India
| | - Sunil G Naik
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer Distt., Rajasthan 305817, India
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54
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Recent progress in the development of organic dye based near-infrared fluorescence probes for metal ions. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.06.011] [Citation(s) in RCA: 222] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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55
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Puglisi R, Pappalardo A, Gulino A, Trusso Sfrazzetto G. Supramolecular recognition of a CWA simulant by metal–salen complexes: the first multi-topic approach. Chem Commun (Camb) 2018; 54:11156-11159. [DOI: 10.1039/c8cc06425c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A new methodology to detect efficiently and selectively a CWA simulant using multi-topic receptors is reported here.
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Affiliation(s)
- Roberta Puglisi
- Department of Chemical Sciences
- University of Catania
- 95100 Catania
- Italy
| | - Andrea Pappalardo
- Department of Chemical Sciences
- University of Catania
- 95100 Catania
- Italy
- University of Catania Research Unit (I.N.S.T.M.) UdR of Catania
| | - Antonino Gulino
- Department of Chemical Sciences
- University of Catania
- 95100 Catania
- Italy
- University of Catania Research Unit (I.N.S.T.M.) UdR of Catania
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56
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57
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The zinc paradigm for metalloneurochemistry. Essays Biochem 2017; 61:225-235. [DOI: 10.1042/ebc20160073] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/10/2017] [Accepted: 03/28/2017] [Indexed: 01/06/2023]
Abstract
Neurotransmission and sensory perception are shaped through metal ion–protein interactions in various brain regions. The term "metalloneurochemistry" defines the unique field of bioinorganic chemistry focusing on these processes, and zinc has been the leading target of metalloneurochemists in the almost 15 years since the definition was introduced. Zinc in the hippocampus interacts with receptors that dictate ion flow and neurotransmitter release. Understanding the intricacies of these interactions is crucial to uncovering the role that zinc plays in learning and memory. Based on receptor similarities and zinc-enriched neurons (ZENs) in areas of the brain responsible for sensory perception, such as the olfactory bulb (OB), and dorsal cochlear nucleus (DCN), zinc participates in odor and sound perception. Development and improvement of methods which allow for precise detection and immediate manipulation of zinc ions in neuronal cells and in brain slices will be critical in uncovering the synaptic action of zinc and, more broadly, the bioinorganic chemistry of cognition.
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58
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Walke GR, Ranade DS, Ramteke SN, Rapole S, Satriano C, Rizzarelli E, Tomaselli GA, Trusso Sfrazzetto G, Kulkarni PP. Fluorescent Copper Probe Inhibiting Aβ1-16-Copper(II)-Catalyzed Intracellular Reactive Oxygen Species Production. Inorg Chem 2017; 56:3729-3732. [PMID: 28318262 DOI: 10.1021/acs.inorgchem.6b02915] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A variety of fluorescent probes are proposed to monitor the intracellular copper content. So far, none of the probes have been evaluated for their potential to inhibit copper-associated intracellular oxidative stress. Herein, we studied the ability of a fluorescent copper probe, OBEP-CS1, to inhibit intracellular oxidative stress associated with an amyloid β (Aβ) peptide-copper complex. The data showed that OBEP-CS1 completely inhibits the copper-catalyzed oxidation as well as decarboxylation/deamination of Aβ1-16. Moreover, the cell imaging experiments confirmed that OBEP-CS1 can inhibit Aβ-CuII-catalyzed reactive oxygen species production in SH-SY5Y cells. We also demonstrated that Aβ1-16 peptide can bind intracellular copper and thereby exert oxidative stress.
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Affiliation(s)
- Gulshan R Walke
- Bioprospecting Group, Agharkar Research Institute , Pune, India
| | | | | | - Srikanth Rapole
- Proteomics Laboratory, National Centre for Cell Science (NCCS), University of Pune Campus , Pune, India
| | - Cristina Satriano
- Department of Chemical Sciences, University of Catania , Viale Andrea Doria 6, 95125 Catania, Italy.,Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici , via Celso Ulpiani, 27, 70125 Bari, Italy
| | - Enrico Rizzarelli
- Department of Chemical Sciences, University of Catania , Viale Andrea Doria 6, 95125 Catania, Italy.,Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici , via Celso Ulpiani, 27, 70125 Bari, Italy.,Institute of Biostructures and Bioimages, National Council of Research , Via P. Gaifami 18, 95126 Catania, Italy
| | - Gaetano A Tomaselli
- Department of Chemical Sciences, University of Catania , Viale Andrea Doria 6, 95125 Catania, Italy
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59
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Fluorescent (pyrazolyl acetoxime)Zn II complexes: Synthetic, structural, and photophysical studies. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.10.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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60
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Pandini G, Satriano C, Pietropaolo A, Gianì F, Travaglia A, La Mendola D, Nicoletti VG, Rizzarelli E. The Inorganic Side of NGF: Copper(II) and Zinc(II) Affect the NGF Mimicking Signaling of the N-Terminus Peptides Encompassing the Recognition Domain of TrkA Receptor. Front Neurosci 2016; 10:569. [PMID: 28090201 PMCID: PMC5201159 DOI: 10.3389/fnins.2016.00569] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 11/25/2016] [Indexed: 12/31/2022] Open
Abstract
The nerve growth factor (NGF) N-terminus peptide, NGF(1–14), and its acetylated form, Ac-NGF(1–14), were investigated to scrutinize the ability of this neurotrophin domain to mimic the whole protein. Theoretical calculations demonstrated that non-covalent forces assist the molecular recognition of TrkA receptor by both peptides. Combined parallel tempering/docking simulations discriminated the effect of the N-terminal acetylation on the recognition of NGF(1–14) by the domain 5 of TrkA (TrkA-D5). Experimental findings demonstrated that both NGF(1–14) and Ac-NGF(1–14) activate TrkA signaling pathways essential for neuronal survival. The NGF-induced TrkA internalization was slightly inhibited in the presence of Cu2+ and Zn2+ ions, whereas the metal ions elicited the NGF(1–14)-induced internalization of TrkA and no significant differences were found in the weak Ac-NGF(1–14)-induced receptor internalization. The crucial role of the metals was confirmed by experiments with the metal-chelator bathocuproine disulfonic acid, which showed different inhibitory effects in the signaling cascade, due to different metal affinity of NGF, NGF(1–14) and Ac-NGF(1–14). The NGF signaling cascade, activated by the two peptides, induced CREB phosphorylation, but the copper addition further stimulated the Akt, ERK and CREB phosphorylation in the presence of NGF and NGF(1–14) only. A dynamic and quick influx of both peptides into PC12 cells was tracked by live cell imaging with confocal microscopy. A significant role of copper ions was found in the modulation of peptide sub-cellular localization, especially at the nuclear level. Furthermore, a strong copper ionophoric ability of NGF(1–14) was measured. The Ac-NGF(1–14) peptide, which binds copper ions with a lower stability constant than NGF(1–14), exhibited a lower nuclear localization with respect to the total cellular uptake. These findings were correlated to the metal-induced increase of CREB and BDNF expression caused by NGF(1–14) stimulation. In summary, we here validated NGF(1–14) and Ac-NGF(1–14) as first examples of monomer and linear peptides able to activate the NGF-TrkA signaling cascade. Metal ions modulated the activity of both NGF protein and the NGF-mimicking peptides. Such findings demonstrated that NGF(1–14) sequence can reproduce the signal transduction of whole protein, therefore representing a very promising drug candidate for further pre-clinical studies.
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Affiliation(s)
- Giuseppe Pandini
- Endocrinology, Department of Clinical and Experimental Medicine, Garibaldi-Nesima Medical Center, University of CataniaCatania, Italy; Institute of Biostructures and Bioimages - Catania, National Research CouncilCatania, Italy
| | - Cristina Satriano
- Department of Chemical Sciences, University of CataniaCatania, Italy; Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi BiologiciBari, Italy
| | | | - Fiorenza Gianì
- Endocrinology, Department of Clinical and Experimental Medicine, Garibaldi-Nesima Medical Center, University of CataniaCatania, Italy; Institute of Biostructures and Bioimages - Catania, National Research CouncilCatania, Italy
| | | | - Diego La Mendola
- Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi BiologiciBari, Italy; Department of Pharmacy, University of PisaPisa, Italy
| | - Vincenzo G Nicoletti
- Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi BiologiciBari, Italy; Section of Medical Biochemistry, Department of Biomedical and Biotechnological Sciences (BIOMETEC), University of CataniaCatania, Italy
| | - Enrico Rizzarelli
- Institute of Biostructures and Bioimages - Catania, National Research CouncilCatania, Italy; Department of Chemical Sciences, University of CataniaCatania, Italy; Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi BiologiciBari, Italy
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61
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Magrì A, Tabbì G, Giuffrida A, Pappalardo G, Satriano C, Naletova I, Nicoletti VG, Attanasio F. Influence of the N-terminus acetylation of Semax, a synthetic analog of ACTH(4-10), on copper(II) and zinc(II) coordination and biological properties. J Inorg Biochem 2016; 164:59-69. [PMID: 27586814 DOI: 10.1016/j.jinorgbio.2016.08.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 08/23/2016] [Accepted: 08/25/2016] [Indexed: 10/21/2022]
Abstract
Semax is a heptapeptide (Met-Glu-His-Phe-Pro-Gly-Pro) that encompasses the sequence 4-7 of N-terminal domain of the adrenocorticotropic hormone and a C-terminal Pro-Gly-Pro tripeptide. N-terminal amino group acetylation (Ac-Semax) modulates the chemical and biological properties of parental peptide, modifying the ability of Semax to form complex species with Cu(II) ion. At physiological pH, the main complex species formed by Ac-Semax, [CuLH-2]2-, consists in a distorted CuN3O chromophore with a weak apical interaction of the methionine sulphur. Such a complex differs from the Cu(II)-Semax complex system, which exhibits a CuN4 chromophore. The reduced ligand field affects the [CuLH-2]2- formal redox potential, which is more positive than that of Cu(II)-Semax corresponding species. In the amino-free form, the resulting complex species is redox-stable and unreactive against ascorbic acid, unlike the acetylated form. Semax acetylation did not protect from Cu(II) induced toxicity on a SH-SY5Y neuroblastoma cell line, thus demonstrating the crucial role played by the free NH2 terminus in the cell protection. Since several brain diseases are associated either to Cu(II) or Zn(II) dyshomeostasis, here we characterized also the complex species formed by Zn(II) with Semax and Ac-Semax. Both peptides were able to form Zn(II) complex species with comparable strength. Confocal microscopy imaging confirmed that peptide group acetylation does not affect the Zn(II) influx in neuroblastoma cells. Moreover, a punctuate distribution of Zn(II) within the cells suggests a preferred subcellular localization that might explain the zinc toxic effect. A future perspective can be the use of Ac-Semax as ionophore in antibody drug conjugates to produce a dysmetallostasis in tumor cells.
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Affiliation(s)
- Antonio Magrì
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche (CNR), Via P. Gaifami 18, 95126 Catania, Italy
| | - Giovanni Tabbì
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche (CNR), Via P. Gaifami 18, 95126 Catania, Italy.
| | - Alessandro Giuffrida
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche (CNR), Via P. Gaifami 18, 95126 Catania, Italy
| | - Giuseppe Pappalardo
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche (CNR), Via P. Gaifami 18, 95126 Catania, Italy
| | - Cristina Satriano
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria 6, 95125 Catania, Italy
| | - Irina Naletova
- Dipartimento di Scienze Biomediche, Università degli Studi di Catania, Viale A. Doria 6, 95125 Catania, Italy; Consorzio Interuniversitario C.I.R.C.S.M.B., Via C. Ulpiani 27, 70125 Bari, Italy
| | - Vincenzo G Nicoletti
- Dipartimento di Scienze Biomediche, Università degli Studi di Catania, Viale A. Doria 6, 95125 Catania, Italy
| | - Francesco Attanasio
- Istituto di Biostrutture e Bioimmagini, Consiglio Nazionale delle Ricerche (CNR), Via P. Gaifami 18, 95126 Catania, Italy.
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62
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Tice DB, Pike RD, Bebout DC. Contrasting coordination behavior of Group 12 perchlorate salts with an acyclic N3O2 donor ligand by X-ray crystallography and (1)H NMR. Dalton Trans 2016; 45:12871-83. [PMID: 27472535 DOI: 10.1039/c6dt02322c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unbranched N3O2 ligand 2,6-bis[((2-pyridinylmethyl)oxy)methyl]pyridine (L1) was used to prepare new mononuclear heteroleptic Group 12 perchlorate complexes characterized by IR, (1)H NMR and X-ray crystallography. Racemic complexes with pentadentate L1 and one to four oxygens from either water or perchlorate bound to a metal ion were structurally characterized. Octahedral [Zn(L1)(OH2)](ClO4)2 (1) and pentagonal bipyramidal [Cd(L1)(OH2)(OClO3)]ClO4 (2) structures were found with lighter congeners. The polymorphic forms of [Hg(L1)(ClO4)2] characterized (3 in P1[combining macron] and 4 in P21/c) had a mix of monodentate, anisobidentate and bidentate perchlorates, providing the first examples of a tricapped trigonal prismatic Hg(ii) coordination geometry, as well as additional examples of a rare square antiprismatic Hg(ii) coordination geometry. Solution state (1)H NMR characterization of the Group 12 complexes in CD3CN indicated intramolecular reorganization remained rapid under conditions where intermolecular M-L1 exchange was slow on the chemical shift time scale for Zn(ii) and on the J(M(1)H) time scale for Cd(ii) and Hg(ii). Solution studies with more than one equivalent of ligand also suggested that a complex with a 1 : 2 ratio of M : L1 contributed significantly to solution equilibria with Hg(ii) but not the other metal ions. The behavior of related linear pentadentate ligands with Group 12 perchlorate salts is discussed.
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Affiliation(s)
- Daniel B Tice
- The College of William & Mary, Department of Chemistry, Williamsburg, VA, USA.
| | - Robert D Pike
- The College of William & Mary, Department of Chemistry, Williamsburg, VA, USA.
| | - Deborah C Bebout
- The College of William & Mary, Department of Chemistry, Williamsburg, VA, USA.
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