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Nagar A, Srivastava A, Sengupta A, Sk MA, Goyal P, Verma PK, Mohapatra PK. Experimental and Theoretical Insight into the Ionic Liquid-Mediated Complexation of Trivalent Lanthanides with β-Diketone and Its Fluorinated Analogue. Inorg Chem 2024; 63:2533-2552. [PMID: 38272469 DOI: 10.1021/acs.inorgchem.3c03731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
A multitechnique approach with theoretical insights has been employed to understand the complexation of trivalent lanthanides with two β-diketones, viz. 1-phenyl-1,3-butanedione (L1) and 4,4,4-trifluoro-1-phenyl-1,3-butanedione (L2), in an ionic liquid (C6mim·NTf2). UV-vis spectral analysis of complexation using Nd3+ revealed the predominance of ML2+ and ML4- species. The stability constants for the PB complexes were higher (β2 ∼ 10.45 ± 0.05, β4 ∼ 15.51 ± 0.05) than those for the TPB (β2 ∼ 7.56 ± 0.05, β4 ∼ 13.19 ± 0.06). The photoluminescence titration using Eu3+ corroborated the same observations with slightly higher stability constants, probably due to the higher ionic potential of Eu3+. The more asymmetric (AL2ML4 ∼ 5.2) Eu-L2 complex was found to contain one water molecule in the primary coordination sphere of Eu3+ with more covalency of the Eu3+-O bond (Ω2L1 = 8.5 × 10-20, Ω4L1 = 1.3 × 10-20) compared to the less asymmetric Eu-L1 complex (AL1ML4 ∼ 3.5) with two water molecules having less Eu-O covalency (Judd-Offelt parameters: Ω2L1 = 7.3 × 10-20, Ω4L1 = 1.0 × 10-20). Liquid-liquid extraction studies involving Nd3+ and Eu3+ revealed the formation of the ML4- complex following an 'anion exchange' mechanism. The shift of the enol peak from 1176 to 1138 cm-1 on the complexation of the β-diketones with Eu3+ was confirmed from the FTIR spectra. 1H NMR titration of the β-diketones with La(NTf2)3 evidenced the participation of α-H of the β-diketones and protons at C2, C4, and C5 positions of the methylimidazolium ring. For the ML2 complex, 4 donor O atoms are suggested to coordinate to the trivalent lanthanides with bond distances of 2.3297-2.411 Å for La-O, 2.206-2.236 Å for Eu-O, and 2.217-2.268 Å for Nd-O, respectively, while for the ML4 complex, 8 donor O atoms were coordinated with bond lengths of 2.506-2.559 Å for La-O, 2.367-2.447 Å for Eu-O, and 2.408-2.476 Å for Nd-O. The Nd3+ ion was higher by 9.7 kcal·mol-1 than that of the La3+ ion for the 1:4 complex. The complexation energy with L1 was quite higher than that with L2 for both 1:2 and 1:4 complexes. Using cyclic voltammetry, the redox behavior of trivalent lanthanides Eu and Gd with β-diketonate in ionic liquid medium was probed and their redox energetic and kinetic parameters were determined.
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Affiliation(s)
- Adityamani Nagar
- UM-DAE Centre for Excellence in Basic Sciences, Mumbai 400098, India
| | - Ashutosh Srivastava
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Arijit Sengupta
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400094, India
| | - Musharaf Ali Sk
- Homi Bhabha National Institute, Mumbai 400094, India
- Chemical Engineering Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Priya Goyal
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Parveen K Verma
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Prasanta K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400094, India
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Novel Zn(II) and Cd(II) coordination polymers derived from 1,2,3-triazole-1,3-diketone ligand. Syntheses and structural, thermal, computational, and luminescent studies. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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de Gonzalo G, Alcántara AR. Recent Developments in the Synthesis of β-Diketones. Pharmaceuticals (Basel) 2021; 14:ph14101043. [PMID: 34681266 PMCID: PMC8541089 DOI: 10.3390/ph14101043] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/02/2021] [Accepted: 10/11/2021] [Indexed: 12/16/2022] Open
Abstract
Apart from being one of the most important intermediates in chemical synthesis, broadly used in the formation of C-C bonds among other processes, the β-dicarbonyl structure is present in a huge number of biologically and pharmaceutically active compounds. In fact, mainly derived from the well-known antioxidant capability associated with the corresponding enol tautomer, β-diketones are valuable compounds in the treatment of many pathological disorders, such as cardiovascular and liver diseases, hypertension, obesity, diabetes, neurological disorders, inflammation, skin diseases, fibrosis, or arthritis; therefore, the synthesis of these structures is an area of overwhelming interest for organic chemists. This paper is devoted to the advances achieved in the last ten years for the preparation of 1,3-diketones, using different chemical (Claisen, hydration of alkynones, decarboxylative coupling) or catalytic (biocatalysis, organocatalytic, metal-based catalysis) methodologies: Additionally, the preparation of branched β-dicarbonyl compounds by means of α-functionalization of non-substituted 1,3-diketones are also discussed.
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Affiliation(s)
- Gonzalo de Gonzalo
- Organic Chemistry Department, University of Sevilla, c/Profesor García González 2, 41012 Sevilla, Spain
- Correspondence: (G.d.G.); (A.R.A.); Tel.: +34-95-455-99-97 (G.d.G.); +34-91-394-18-21 (A.R.A.)
| | - Andrés R. Alcántara
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Complutense University of Madrid, Plaza de Ramón y Cajal, s/n., 28040 Madrid, Spain
- Correspondence: (G.d.G.); (A.R.A.); Tel.: +34-95-455-99-97 (G.d.G.); +34-91-394-18-21 (A.R.A.)
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Tejeda-Orusco V, Andreu R, Orduna J, Villacampa B, Franco S, Civera A. Twisted One-Dimensional Charge Transfer and Related Y-Shaped Chromophores with a 4 H-Pyranylidene Donor: Synthesis and Optical Properties. J Org Chem 2021; 86:3152-3163. [PMID: 33530683 PMCID: PMC9161450 DOI: 10.1021/acs.joc.0c02438] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Three series of push–pull
derivatives bearing 4H-pyranylidene as electron donor
group and a variety of acceptors
were designed. On one hand, one-dimensional chromophores with a thiophene
ring (series 1H) or 5-dimethylaminothiophene moiety (series 1N) as an auxiliary donor, non-coplanar with the π-conjugated
system, were synthesized. On the other hand, related two-dimensional
(2D) Y-shaped chromophores (series 2) were also prepared
to compare how the diverse architectures affect the electrochemical,
linear, and second-order nonlinear optical (NLO) properties. The presence
of the 5-dimethylaminothiophene moiety in the exocyclic C=C
bond of the pyranylidene unit gives rise to oxidation potentials rarely
low, and the protonation (with an excess of trifluoroacetic acid)
of its derivatives results in the apparition of a new blue-shifted
band in the UV–visible spectra. The analysis of the properties
of derivatives with and without the additional thiophene ring shows
that this auxiliary donor leads to a higher NLO response, accompanied
by an enhanced transparency. Y-shaped chromophores of series 2 present a blue-shifted absorption, higher molar extinction
coefficients, and higher Eox values compared
to their linear twisted counterparts. As concerns NLO properties,
2D Y-shaped architecture gives rise to somewhat lower μβ
values (except for thiobarbiturate derivatives).
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Affiliation(s)
- Víctor Tejeda-Orusco
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Química Orgánica, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Raquel Andreu
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Química Orgánica, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Jesús Orduna
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Química Orgánica, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Belén Villacampa
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Santiago Franco
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Química Orgánica, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Alba Civera
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Química Orgánica, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
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Novoa N, Manzur C, Roisnel T, Dorcet V, Cabon N, Robin-Le Guen F, Ledoux-Rak I, Kahlal S, Saillard JY, Carrillo D, Hamon JR. Redox-switching of ternary Ni(ii) and Cu(ii) complexes: synthesis, experimental and theoretical studies along with second-order nonlinear optical properties. NEW J CHEM 2019. [DOI: 10.1039/c9nj01774g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The redox-switching behavior of the title compounds has been probed for the Ni(ii) derivatives using time-resolved spectroelectrochemistry under thin-layer conditions.
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Novel Co(II), Ni(II) and Cu(II) complexes involving a 2-thienyl and trifluoromethyl containing symmetrically-substituted tetradentate Schiff-base ligand: Syntheses, structures, electrochemical and computational studies. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.05.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Ahumada G, Oyarce J, Roisnel T, Kahlal S, del Valle MA, Carrillo D, Saillard JY, Hamon JR, Manzur C. Synthesis, structures, electrochemical and quantum chemical investigations of Ni(ii) and Cu(ii) complexes with a tetradentate Schiff base derived from 1-(2-thienyl)-1,3-butanedione. NEW J CHEM 2018. [DOI: 10.1039/c8nj04923h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrochemical oxidation of four-coordinate square planar Schiff-base Ni(ii) and Cu(ii) complexes leads to the formation of oligomers at the electrode.
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Affiliation(s)
- Guillermo Ahumada
- Laboratorio de Química Inorgánica
- Instituto de Química
- Facultad de Ciencias
- Pontificia Universidad Católica de Valparaíso
- Valparaíso
| | - Jocelyn Oyarce
- Laboratorio de Química Inorgánica
- Instituto de Química
- Facultad de Ciencias
- Pontificia Universidad Católica de Valparaíso
- Valparaíso
| | - Thierry Roisnel
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226
- F-35000 Rennes
- France
| | - Samia Kahlal
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226
- F-35000 Rennes
- France
| | - María Angélica del Valle
- Laboratorio de Electroquímica de Polímeros (LEP)
- Pontificia Universidad Católica de Chile
- 7820436 Macul
- Chile
| | - David Carrillo
- Laboratorio de Química Inorgánica
- Instituto de Química
- Facultad de Ciencias
- Pontificia Universidad Católica de Valparaíso
- Valparaíso
| | - Jean-Yves Saillard
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226
- F-35000 Rennes
- France
| | - Jean-René Hamon
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226
- F-35000 Rennes
- France
| | - Carolina Manzur
- Laboratorio de Química Inorgánica
- Instituto de Química
- Facultad de Ciencias
- Pontificia Universidad Católica de Valparaíso
- Valparaíso
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Wojcik L, Michaud F, Gauthier S, Cabon N, Le Poul P, Gloaguen F, Le Poul N. Reversible Redox Switching of Chromophoric Phenylmethylenepyrans by Carbon-Carbon Bond Making/Breaking. J Org Chem 2017; 82:12395-12405. [PMID: 29058426 DOI: 10.1021/acs.joc.7b02199] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Electrochromic organic systems that can undergo substantial variation of their optical properties upon electron stimulus are of high interest for the development of functional materials. In particular, devices based on radical dimerization are appropriate because of the effectiveness and speed of carbon-carbon bond making/breaking. Phenylmethylenepyrans are organic chromophores which are well suited for such purposes since their oxidation leads to the reversible formation of bispyrylium species by radical dimerization. In this paper, we show that the redox and spectroscopic properties of phenylmethylenepyrans can be modulated by adequate variation of the substituting group on the para position of the phenyl moiety, as supported by DFT calculations. This redox switching is reversible over several cycles and is accompanied by a significant modification of the UV-vis spectrum of the chromophore, as shown by time-resolved spectroelectrochemistry in thin-layer conditions.
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Affiliation(s)
- Laurianne Wojcik
- Laboratoire CEMCA, CNRS UMR 6521, Université de Bretagne Occidentale , 6 Avenue Le Gorgeu, CS 93837, Brest 29238 Cedex, France
| | - François Michaud
- Service PIMM-DRX, Université de Bretagne Occidentale , 6 Avenue Le Gorgeu, CS 93837, Brest29238 Cedex, France
| | - Sébastien Gauthier
- IUT de Lannion, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Université de Rennes 1 , Rue Edouard Branly, 22300 Lannion, France
| | - Nolwenn Cabon
- IUT de Lannion, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Université de Rennes 1 , Rue Edouard Branly, 22300 Lannion, France
| | - Pascal Le Poul
- IUT de Lannion, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Université de Rennes 1 , Rue Edouard Branly, 22300 Lannion, France
| | - Frederic Gloaguen
- Laboratoire CEMCA, CNRS UMR 6521, Université de Bretagne Occidentale , 6 Avenue Le Gorgeu, CS 93837, Brest 29238 Cedex, France
| | - Nicolas Le Poul
- Laboratoire CEMCA, CNRS UMR 6521, Université de Bretagne Occidentale , 6 Avenue Le Gorgeu, CS 93837, Brest 29238 Cedex, France
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Ahumada G, Fuentealba M, Roisnel T, Kahlal S, Córdova R, Carrillo D, Saillard JY, Hamon JR, Manzur C. Spectroscopic, structural, electrochemical and computational studies of some new 2-thienyl-containing β-diketonate complexes of cobalt(II), nickel(II) and copper(II). J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.09.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Thiophene-containing β-diketonate complex of copper(II): X-ray crystal structure and electropolymerization. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.12.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ahumada G, Carrillo D, Manzur C, Fuentealba M, Roisnel T, Hamon JR. A facile access to new diazepines derivatives: Spectral characterization and crystal structures of 7-(thiophene-2-yl)-5-(trifluoromethyl)-2,3-dihydro-1 H -1,4-diazepine and 2-thiophene-4-trifluoromethyl-1,5-benzodiazepine. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.07.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Mahmudov KT, Pombeiro AJL. Resonance-Assisted Hydrogen Bonding as a Driving Force in Synthesis and a Synthon in the Design of Materials. Chemistry 2016; 22:16356-16398. [PMID: 27492126 DOI: 10.1002/chem.201601766] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Indexed: 11/08/2022]
Abstract
Resonance-assisted hydrogen bonding (RAHB), a concept introduced by Gilli and co-workers in 1989, concerns a kind of intramolecular H-bonding strengthened by a conjugated π-system, usually in 6-, 8-, or 10-membered rings. This Review highlights the involvement of RAHB as a driving force in the synthesis of organic, coordination, and organometallic compounds, as a handy tool in the activation of covalent bonds, and in starting moieties for synthetic transformations. The unique roles of RAHB in molecular recognition and switches, E/Z isomeric resolution, racemization and epimerization of amino acids and chiral amino alcohols, solvatochromism, liquid-crystalline compounds, and in synthons for crystal engineering and polymer materials are also discussed. The Review can provide practical guidance for synthetic chemists that are interested in exploring and further developing RAHB-assisted synthesis and design of materials.
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Affiliation(s)
- Kamran T Mahmudov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal. .,Department of Chemistry, Baku State University, Z. Xalilov Str. 23, Az 1148, Baku, Azerbaijan.
| | - Armando J L Pombeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal.
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