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Ali HM, Ali IH. Thermal and thermo-oxidative stability of a series of palladium and platinum ferrocenylamine sulfides and selenides. JOURNAL OF CHEMICAL RESEARCH 2022. [DOI: 10.1177/17475198221141979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ferrocenylamine complexes have found increasing applications in the fields of catalysis in various organic reactions, industry, medical treatments and enzyme–activity determinations. Therefore, information related to the thermal and thermo-oxidative stability of these compounds is important for such applications; however, this information is currently limited. Twenty previously prepared palladium and platinum ferrocenylamine complexes with systematic structural variations are examined for their thermal (under nitrogen) and thermo-oxidation stability (under atmospheric air) using thermogravimetry (TG), differential thermal analysis (DTG), and differential scanning calorimetry (DSC) techniques. Degradation products are identified by comparing thermogravimetric analysis and theoretical calculations. Structure–stability studies are also discussed. The results show that all the compounds have high thermal and thermo-oxidative stabilities of up to 265 and 173 °C, respectively. Electron–donating substituents enhance the thermal and thermo-oxidative stabilities of the palladium complexes ( t-Bu, selenide electrophiles and dielectrophiles), while those with destabilizing effects are aromatic substituents (Ph and tolyl). Most platinum ferrocenylamine sulfides and selenides show higher thermal and thermo-oxidative stabilities than their corresponding palladium analogs. All the prepared compounds show high thermal and thermo-oxidative stability which reinforces their catalytic and industrial applications. However, their thermal stability is higher than their thermo-oxidative stability.
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Affiliation(s)
- Hussein M Ali
- Department of Agricultural Biochemistry, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Isra H Ali
- Department of Pharmaceutics, Faculty of Pharmacy, University of Sadat City, Sadat City, Egypt
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Abstract
Anions play a vital role in a broad range of environmental, technological, and physiological processes, making their detection/quantification valuable. Electroanalytical sensors offer much to the selective, sensitive, cheap, portable, and real-time analysis of anion presence where suitable combinations of selective (noncovalent) recognition and transduction can be integrated. Spurred on by significant developments in anion supramolecular chemistry, electrochemical anion sensing has received considerable attention in the past two decades. In this review, we provide a detailed overview of all electroanalytical techniques that have been used for this purpose, including voltammetric, impedimetric, capacititive, and potentiometric methods. We will confine our discussion to sensors that are based on synthetic anion receptors with a specific focus on reversible, noncovalent interactions, in particular, hydrogen- and halogen-bonding. Apart from their sensory properties, we will also discuss how electrochemical techniques can be used to study anion recognition processes (e.g., binding constant determination) and will furthermore provide a detailed outlook over future efforts and promising new avenues in this field.
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Affiliation(s)
- Robert Hein
- Department of Chemistry , University of Oxford , South Parks Road , Oxford OX1 3QZ , U.K
| | - Paul D Beer
- Department of Chemistry , University of Oxford , South Parks Road , Oxford OX1 3QZ , U.K
| | - Jason J Davis
- Department of Chemistry , University of Oxford , South Parks Road , Oxford OX1 3QZ , U.K
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Mishra V, Thirupathi N. Critical Role of Anions in Platinum(II) Precursors upon the Structural Motifs of Six-Membered Cycloplatinated N, N', N″-Triarylguanidines. ACS OMEGA 2018; 3:6075-6090. [PMID: 31458795 PMCID: PMC6644913 DOI: 10.1021/acsomega.8b00782] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Accepted: 05/24/2018] [Indexed: 05/20/2023]
Abstract
The reactions of cis-[Pt(OAc)2(DMSO)2] with 2 equiv of sym N,N',N″-triarylguanidines, [ArN=C(NHAr)2], in toluene under reflux condition for 8 h afforded six-membered cycloplatinated guanidines, [Pt{κ2(C,N)}(OAc){κ1 N(ArN=C(NHAr)2)}] [sym = symmetrical; Ar = 2-MeC6H4 (1) and 2,4-Me2C6H3 (2)], in 82 and 84% yields, respectively. The salt metathesis reaction of 1 with 1 equiv of AgTFA in CH2Cl2 at room temperature (RT) afforded [Pt{κ2(C,N)}(TFA){κ1 N(ArN=C(NHAr)2)}] (3) in 94% yield. The reaction of cis-[Pt(TFA)2(DMSO)2] with 1 equiv of [ArN=C(NHAr)2] in toluene under reflux condition for 8 h afforded six-membered cycloplatinated guanidines, [Pt{κ2(C,N)}(TFA)(DMSO)] [Ar = 2-MeC6H4 (4), 4-MeC6H4 (5), 2,4-Me2C6H3 (6), and 2-(MeO)C6H4 (7)], in ≥73% yields. The reaction of trans-[PtCl2(PhCN)2] with 2 equiv of [ArN=C(NHAr)2] in toluene under reflux condition for 48 h afforded trans-[PtCl2{ArN=C(NHAr)2}2] [Ar = 2-MeC6H4 (8) and 2,4-Me2C6H3 (9)] in 90 and 45% yields, respectively. Complexes 8 and 9 were separately refluxed in MeOH for 8 h to afford six-membered cycloplatinated guanidines, [Pt{κ2(C,N)}(μ-Cl)]2 (10 and 11), in 93 and 96% yields, respectively, with concomitant formation of the respective guanidinium salts, [(ArNH)3C]Cl, as the byproduct. Platinacycle 10 was treated with 2 equiv of AgTFA in CH2Cl2 at RT to afford six-membered cycloplatinated guanidine, [Pt{κ2(C,N)}(μ-TFA)]2 (12), in 94% yield. The new compounds were characterized by analytical techniques and multinuclear NMR (1H, 13C, and 195Pt) spectroscopy, and further, molecular structures of 10 compounds were determined by single-crystal X-ray diffraction. The structural motif in 1·1/2CH2Cl2 and 3 is novel in that it contains a planar six-membered [Pt{κ2(C,N)}] unit and a nonplanar eight-membered [Pt{κ2(N,O)}] ring, wherein OAc and the guanidine ligands are linked through a N-H···O hydrogen bond. The six-membered cycloplatinated structural motifs present in 10/11·C7H8 and 12·CH2Cl2 are also unprecedented in the literature. The number and nature of solution species of new complexes were unambiguously investigated by detailed NMR studies. The critical role of anions in Pt(II) precursors upon the course of cycloplatination and thus the motifs in the products were addressed. Plausible mechanisms of cycloplatination reactions are discussed.
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Synergistic effect of MoS 2 and diamond nanoparticles in electrochemical sensors: determination of the anticonvulsant drug valproic acid. Mikrochim Acta 2018; 185:334. [PMID: 29934854 DOI: 10.1007/s00604-018-2793-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 04/07/2018] [Indexed: 12/21/2022]
Abstract
The authors describe an electrochemical sensor based on the use of diamond nanoparticles (DNPs) and molybdenum disulfide (MoS2) platelets. The sensor was applied to the voltammetric determination of the anticonvulsant valproic acid which was previously derivatized with ferrocene. The MoS2 platelets were obtained by an exfoliation method, and the DNPs were directly dispersed in water and subsequently deposited on a glassy carbon electrode (GCE). The sensor response was optimized in terms of the solvent employed for dispersing the MoS2 nanomaterial and the method for modifying the GCE. Sensors consisting of a first layer of MoS2 dispersed in ethanol/water and a second layer of DNPs give better response. The single steps of sensor construction were characterized by atomic force microscopy and electrochemical impedance spectroscopy. The differential pulse voltammetric response of the GCE (measured at +0.18 V vs. Ag/AgCl) was compared to that of sensors incorporating only one of the nanomateriales (DNPs or MoS2). The formation of a hybrid MoS2-DNP structure clearly improves performance. The GCE containing both nanomaterials exhibits high sensitivity (740 µA ⋅ mM-1 ⋅ cm-2), a 0.27 μM detection limit, and an 8% reproducibility (RSD). The sensor retained 99% of its initial response after 45 days of storage. Graphical abstract Electrochemical sensor by co-immobilization of MoS2 and diamond nanoparticles (DNP). The formation of a hybrid MoS2-DNP structure enhances the performance of the sensor towards valproic acid derivatized with a ferrocene group, when compared with sensors incorporating only DNP or MoS2.
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Harris SM, Nguyen JT, Pailloux SL, Mansergh JP, Dresel MJ, Swanholm TB, Gao T, Pierre VC. Gadolinium Complex for the Catch and Release of Phosphate from Water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:4549-4558. [PMID: 28379006 DOI: 10.1021/acs.est.6b05815] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The ability of complexes of hard and labile metal ions with one or more open coordination sites to capture phosphates with high affinity and selectivity directly in water at neutral pH and release them under acidic conditions is evaluated with Gadolinium- 2,2',2''-(((nitrilotris(ethane-2,1-diyl))tris(azanediyl))tris(carbonyl))tris(4-oxo-4H-pyran-3-olate) (Gd-TREN-MAM). This model lanthanide complex has two open coordination sites that, at neutral pH, are filled with water molecules. In water at neutral pH, Gd-TREN-MAM binds phosphate with high affinity (Ka = 1.3 × 104) via the formation of a ternary complex in which one phosphate replaces both inner-sphere water molecules. The formation of this complex is highly pH-dependent; the phosphate is completely released from Gd-TREN-MAM below pH 2. Because the GdIII ion remains complexed by its ligand, even under strong acidic conditions, Gd-TREN-MAM can be used at least 10 times in a pH-based recycling scheme that enables the catch and release of one phosphate per cycle. Gd-TREN-MAM is highly selective for phosphate over other anions of environmental concerns, including HCO3-, HCO2-, CH3CO2-, SO42-, NO3-, NO2-, BrO3-, AsO4-, F-, Cl-, and Br- and, to a lesser extent, ClO3-. The development of such receptors that bind phosphate reversibly in a pH-dependent manner opens the possibility to design catch-and-release systems for the purification of surface waters.
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Affiliation(s)
- Sarah M Harris
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Jamie T Nguyen
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Sylvie L Pailloux
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Jarrett P Mansergh
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Mark J Dresel
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Tran B Swanholm
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Tuo Gao
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Valérie C Pierre
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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6
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Bruña S, Garrido-Castro AF, Perles J, Montero-Campillo MM, Mó O, Kaifer AE, Cuadrado I. Multi-Ferrocene-Containing Silanols as Redox-Active Anion Receptors. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00559] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
| | | | | | | | | | - Angel E. Kaifer
- Center
for Supramolecular Science and Department of Chemistry, University of Miami, Coral Gables, Florida 33124-0431, United States
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7
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Antol I, Glasovac Z, Margetić D, Crespo-Otero R, Barbatti M. Insights on the Auxochromic Properties of the Guanidinium Group. J Phys Chem A 2016; 120:7088-100. [PMID: 27556411 DOI: 10.1021/acs.jpca.6b05180] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
UV/vis spectra of phenylguanidine (PHGU) in the gas phase and in acetonitrile have been simulated by TD-DFT calculations. Several DFT hybrid and long-range corrected functionals were tested with respect to CASPT2 gas phase calculations. Solvent effects were considered using polarizable continuum model (PCM) and compared with the measured data in acetonitrile. Comparison with isoelectronic phenylurea and related phenyltiourea was done as well. The PBE0 and long-range corrected CAM-B3LYP functionals were selected to investigate the effect of protonation on the excitation energies and absorption intensities of PHGU and several guanidine derivatives with different aromatic chromophoric groups (naphthyl, anthracenyl, quinolinyl, anthraquinonyl, and coumarinyl). Also, the effect of complexation and specific interactions through hydrogen bonds with different anions was examined. It was shown that the protonation of the guanidine subunit shifts the low energy absorption bands toward higher energies (hypsochromic shift). The shift is reduced upon complexation with anions. In phenylguanidine salts, λmax values are correlated to the anion basicity and strength of H-bonding. The observed changes diminish upon increase of chromophoric size (naphthyl, anthracenyl). Theoretical predictions of UV/vis spectra correlate well with experimentally measured spectra of selected guanidine derivatives and their salts.
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Affiliation(s)
- Ivana Antol
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute , P.O.B. 180, HR-10002 Zagreb, Croatia
| | - Zoran Glasovac
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute , P.O.B. 180, HR-10002 Zagreb, Croatia
| | - Davor Margetić
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute , P.O.B. 180, HR-10002 Zagreb, Croatia
| | - Rachel Crespo-Otero
- School of Biological and Chemical Sciences, Materials Research Institute, Queen Mary University of London , Mile End Road, London E1 4NS, U.K
| | - Mario Barbatti
- Aix Marseille Université , CNRS, ICR, 13284 Marseille, France
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8
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Dascalu M, Balan M, Shova S, Racles C, Cazacu M. Design and synthesis of the first ferrocenylsiloxane urea: Structure and properties. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Nieto D, Bruña S, González-Vadillo AM, Perles J, Carrillo-Hermosilla F, Antiñolo A, Padrón JM, Plata GB, Cuadrado I. Catalytically Generated Ferrocene-Containing Guanidines as Efficient Precursors for New Redox-Active Heterometallic Platinum(II) Complexes with Anticancer Activity. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00751] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel Nieto
- Departamento
de Quı́mica Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Sonia Bruña
- Departamento
de Quı́mica Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Ana M González-Vadillo
- Departamento
de Quı́mica Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Josefina Perles
- Servicio
Interdepartamental de Investigación (SIdI), Laboratorio de
Difracción de Rayos X de Monocrystal, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Fernando Carrillo-Hermosilla
- Centro
de Innovación en Quı́mica Avanzada (ORFEO-CINQA),
Departamento de Quı́mica Inorgánica, Orgánica
y Bioquı́mica, Facultad de Ciencias y Tecnologı́as
Quı́micas, Universidad de Castilla La Mancha, 13071 Ciudad Real, Spain
| | - Antonio Antiñolo
- Centro
de Innovación en Quı́mica Avanzada (ORFEO-CINQA),
Departamento de Quı́mica Inorgánica, Orgánica
y Bioquı́mica, Facultad de Ciencias y Tecnologı́as
Quı́micas, Universidad de Castilla La Mancha, 13071 Ciudad Real, Spain
| | - José M. Padrón
- BioLab,
Instituto Universitario de Bio-Orgánica Antonio González
(IUBO-AG), Centro de Investigaciones Biomédicas de Canarias
(CIBICAN), Universidad de La Laguna, 38206 La Laguna, Spain
| | - Gabriela B. Plata
- BioLab,
Instituto Universitario de Bio-Orgánica Antonio González
(IUBO-AG), Centro de Investigaciones Biomédicas de Canarias
(CIBICAN), Universidad de La Laguna, 38206 La Laguna, Spain
| | - Isabel Cuadrado
- Departamento
de Quı́mica Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
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10
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Development of electrochemical sensor for selective recognition of PO43− ions using organic nanoparticles of dipodal receptor in aqueous medium. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.114] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Sun R, Wang L, Yu H, Abdin ZU, Chen Y, Huang J, Tong R. Molecular Recognition and Sensing Based on Ferrocene Derivatives and Ferrocene-Based Polymers. Organometallics 2014. [DOI: 10.1021/om5000453] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Ruoli Sun
- State
Key Laboratory of Chemical Engineering, Department of Chemical and
Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
| | - Li Wang
- State
Key Laboratory of Chemical Engineering, Department of Chemical and
Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
| | - Haojie Yu
- State
Key Laboratory of Chemical Engineering, Department of Chemical and
Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
| | - Zain-ul- Abdin
- State
Key Laboratory of Chemical Engineering, Department of Chemical and
Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
| | - Yongsheng Chen
- State
Key Laboratory of Chemical Engineering, Department of Chemical and
Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
| | - Jin Huang
- State
Key Laboratory of Chemical Engineering, Department of Chemical and
Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
| | - Rongbai Tong
- State
Key Laboratory of Chemical Engineering, Department of Chemical and
Biological Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
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12
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Nieto D, Bruña S, Montero-Campillo MM, Perles J, González-Vadillo AM, Méndez J, Mo O, Cuadrado I. Mechanochemical and silica gel-mediated formation of highly electron-poor 1-cyanocarbonylferrocene. Chem Commun (Camb) 2013; 49:9785-7. [DOI: 10.1039/c3cc44619k] [Citation(s) in RCA: 12] [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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13
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Ferrocene Derivatives Carrying Urea, Thiourea, and Sulfonamide Moieties: Synthesis and Evaluation of Antibacterial and Antifungal Activities. J CHEM-NY 2013. [DOI: 10.1155/2013/149693] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In the present study, some novel ferrocene derivatives carrying urea, thiourea, and sulfonamide groups were synthesized, and all compounds were characterized by spectral and elemental analyses. These compounds were screened for their antibacterial activities and also their minimum inhibitory concentration (MIC) against Gram-positive bacteria (Staphylococcus aureusandBacillus subtilis) and Gram-negative bacteria (Klebsiella pneumoniaandEscherichia coli) and antifungal activities againstSaccharomyces cerevisiaeandCandida albicans. Amongst the tested compounds,4b,4c,5b, and6bdisplayed excellent antimicrobial activity.
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Saluja P, Kaur N, Singh N, Jang DO. Benzimidazole-based fluorescent sensors for Cr3+ and their resultant complexes for sensing and F−. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.08.022] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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15
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A benzimidazole-based fluorescent sensor for Cu2+ and its complex with a phosphate anion formed through a Cu2+ displacement approach. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.04.062] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Chernyshev AN, Bokach NA, Gushchin PV, Haukka M, Kukushkin VY. Reactions of platinum(iv)-bound nitriles with isomeric nitroanilines: addition vs. substitution. Dalton Trans 2012; 41:12857-64. [DOI: 10.1039/c2dt30986f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Nieto D, González-Vadillo AM, Bruña S, Pastor CJ, Ríos-Luci C, León LG, Padrón JM, Navarro-Ranninger C, Cuadrado I. Heterometallic platinum(II) compounds with β-aminoethylferrocenes: synthesis, electrochemical behaviour and anticancer activity. Dalton Trans 2011; 41:432-41. [PMID: 22025199 DOI: 10.1039/c1dt11358e] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of heterometallic compounds 3-6 containing ferrocenyl and platinum(II) centers has been synthesized by reaction of 1-β-aminoethylferrocene (1) and 1,1'-bis(β-aminoethyl)ferrocene (2) with Pt(II) precursors. Using K(2)[PtCl(4)] as the Pt(II) source, the cis-square-planar neutral compounds [Fe{η(5)-C(5)H(4)(CH(2))(2)NH(2)}(2)PtCl(2)] (3) and [{Fe(η(5)-C(5)H(4)(CH(2))(2)NH(2))(η(5)-C(5)H(5))}(2)PtCl(2)] (5) were obtained. Reaction of cis-[PtCl(2)(dmso)(2)] with 1 and 2 resulted in the displacement of dmso and chloride ligands from the platinum coordination sphere, affording the cationic and neutral compounds [Fe{η(5)-C(5)H(4)(CH(2))(2)NH(2)}(2)Pt(dmso)Cl]Cl (4) and [Fe(η(5)-C(5)H(4)(CH(2))(2)NH(2))(η(5)-C(5)H(5))Pt(dmso)Cl(2)] (6). Compounds 3-6 were thoroughly characterized using multinuclear ((1)H, (13)C, (195)Pt) NMR, IR spectroscopy, ESI mass spectrometry and elemental analysis. Single-crystal X-ray analysis of heterometallic 6 confirmed the cis geometry of the molecule and revealed that the platinum atom is held in a perfect square-planar geometry. The electrochemical behaviour of the heterometallic compounds 3-6, which has been examined by cyclic (CV) and square wave (SWV) voltammetries in dichloromethane and dmso solution, is characterized by the reversible one-electron oxidation of the ferrocene moieties. The results of the biological activity studies revealed that the organometallic complex 5 is active against all cell lines with GI(50) values in the range 1.7-2.3 μM. When compared to the standard anticancer drug cisplatin, heterotrimetallic 5, possessing two aminoethylferrocenyl units coordinated to the Pt(II) center, showed a greater activity profile in the colon cancer cell line. Cell cycle studies revealed that the new mixed compound exhibits a mechanism of action different to cisplatin.
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Affiliation(s)
- Daniel Nieto
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 29049, Madrid, Spain
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18
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Zamora M, Bruña S, Alonso B, Cuadrado I. Polysiloxanes Bearing Pendant Redox-Active Dendritic Wedges Containing Ferrocenyl and (η6-Aryl)tricarbonylchromium Moieties. Macromolecules 2011. [DOI: 10.1021/ma201748d] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Magdalena Zamora
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 29049, Madrid, Spain
| | - Sonia Bruña
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 29049, Madrid, Spain
| | - Beatriz Alonso
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 29049, Madrid, Spain
| | - Isabel Cuadrado
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 29049, Madrid, Spain
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