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Ilincă TA, Iliș M, Micutz M, Cîrcu V. Liquid Crystalline and Gel Properties of Luminescent Cyclometalated Palladium Complexes with Benzoylthiourea Ligands. Gels 2023; 9:777. [PMID: 37888351 PMCID: PMC10606689 DOI: 10.3390/gels9100777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 09/17/2023] [Accepted: 09/20/2023] [Indexed: 10/28/2023] Open
Abstract
The design and development of new luminescent metallogels formed by cyclometalated palladium(II) complexes in protic solvents were investigated by a combination of differential scanning calorimetry (DSC), polarized optical microscopy (POM), and rheology. Cyclometalated palladium(II) complexes based on imine ligand and ancillary benzoylthiourea (BTU) ligand showed red emission in solid and gel states. The formation of a lyotropic liquid crystal phase was observed for the complex bearing shorter alkyl groups on the BTU ligand. This complex also behaved as a thermotropic liquid crystal that displays a monotropic smectic A phase (SmA). Dynamic rheology measurements (frequency sweep in the 5-90 °C range) of the 1-decanol solution of palladium(II) complexes highlighted their supramolecular self-association ability to generate 3D networks and form gels as a final result.
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Affiliation(s)
- Theodora A. Ilincă
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, University of Bucharest, 4-12 Regina Elisabeta Blvd., Sector 5, 030018 Bucharest, Romania
| | - Monica Iliș
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, University of Bucharest, 4-12 Regina Elisabeta Blvd., Sector 5, 030018 Bucharest, Romania
| | - Marin Micutz
- Department of Analytical and Physical Chemistry, University of Bucharest, 4-12 Regina Elisabeta Blvd., Sector 5, 030018 Bucharest, Romania
| | - Viorel Cîrcu
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, University of Bucharest, 4-12 Regina Elisabeta Blvd., Sector 5, 030018 Bucharest, Romania
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Keskin E, Arslan H. Palladium complexes containing NNN pincer type ligands and their activities in Suzuki-Miyaura cross coupling reaction. Heliyon 2023; 9:e17608. [PMID: 37519671 PMCID: PMC10372205 DOI: 10.1016/j.heliyon.2023.e17608] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/22/2023] [Accepted: 06/22/2023] [Indexed: 08/01/2023] Open
Abstract
Five new NNN pincer-type ligands and their palladium complexes were successfully synthesised and characterised by FT-IR, 1H NMR, 13C NMR, and UV-vis analyses. TEM analysis was used to observe the morphological character of the black residues obtained from the fourth cycle of the reusability test. Furthermore, suitable crystals of the N2,N6-bis(2-tert-butylphenyl)pyridine-2,6-dicarboxamide and its palladium complex were elucidated with the X-ray single crystal diffraction method. Both the ligand and its palladium complex crystallise in a monoclinic system with space group P21/c for the H2L4 and C2/c for the palladium complex. The structure of the pincer ligand and its palladium complex were stabilised by intramolecular and intermolecular C-H⋅⋅⋅O, C-H⋅⋅⋅N, and N-H⋅⋅⋅N contacts. A Suzuki-Miyaura cross-coupling reaction between aryl halides and phenylboronic acid was used to assess the catalytic abilities of the palladium pincer complexes. All of the prepared complexes exhibited considerable catalytic activity. However, complexes 4 (Acetonitrile-N2,N6-bis(2-tert-butylphenyl)pyridine-2,6-dicarboxamidopalladium(II)) and 5 (Acetonitrile-N2,N6-bis(2-nitrophenyl)pyridine-2,6-dicarboxamidopalladium(II)) provided almost 100% conversion with nearly 100% yield in the reaction between 4-bromotoluene and phenylboronic acid. Furthermore, these active complexes catalysed the reaction of the sterically hindered and deactivated substrates (1-Bromo-4-izobutylbenzene and 2-bromo-6-methoxynaphthalene) with phenylboronic acid, and complete conversion and yields up to 100% were achieved in a short time with the 2-bromo-6-methoxynaphthalene.
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Cîrcu V, Ganea CP, Secu M, Manaila-Maximean D, Marinescu GC, Popescu RG, Pasuk I. Columnar Liquid Crystals of Copper(I) Complexes with Ionic Conductivity and Solid State Emission. Molecules 2023; 28:molecules28104196. [PMID: 37241937 DOI: 10.3390/molecules28104196] [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: 04/27/2023] [Revised: 05/16/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
Two neutral copper(I) halide complexes ([Cu(BTU)2X], X = Cl, Br) were prepared by the reduction of the corresponding copper(II) halides (chloride or bromide) with a benzoylthiourea (BTU, N-(3,4-diheptyloxybenzoyl)-N'-(4-heptadecafluorooctylphenyl)thiourea) ligand in ethanol. The two copper(I) complexes show a very interesting combination of 2D supramolecular structures, liquid crystalline, emission, and 1D ionic conduction properties. Their chemical structure was ascribed based on ESI-MS, elemental analysis, IR, and NMR spectroscopies (1H and 13C), while the mesomorphic behavior was analyzed through a combination of differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and powder X-ray diffraction (XRD). These new copper(I) complexes have mesomorphic properties and exhibit a hexagonal columnar mesophase over a large temperature range, more than 100 K, as evidenced by DSC studies and POM observations. The thermogravimetric analysis (TG) indicated a very good thermal stability of these samples up to the isotropization temperatures and over the whole temperature range of the liquid crystalline phase existence. Both complexes displayed a solid-state emission with quantum yields up to 8% at ambient temperature. The electrical properties of the new metallomesogens were investigated by variable temperature dielectric spectroscopy over the entire temperature range of the liquid crystalline phase. It was found that the liquid crystal phases favoured anhydrous proton conduction provided by the hydrogen-bonding networks formed by the NH…X moieties (X = halide or oxygen) of the benzoylthiourea ligand in the copper(I) complexes. A proton conductivity of 2.97 × 10-7 S·cm-1 was achieved at 430 K for the chloro-complex and 1.37 × 10-6 S·cm-1 at 440K for the related bromo-complex.
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Affiliation(s)
- Viorel Cîrcu
- Department of Inorganic and Organic Chemistry, Biochemistry and Catalysis, University of Bucharest, 4-12 Regina Elisabeta Bld., Sector 5, 030018 Bucharest, Romania
| | - Constantin P Ganea
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
| | - Mihail Secu
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
| | - Doina Manaila-Maximean
- Department of Physics, University Politehnica of Bucharest, 313 Spl. Independentei, 060042 Bucharest, Romania
- Academy of Romanian Scientists, 3 Ilfov Str., 050094 Bucharest, Romania
| | | | - Roua Gabriela Popescu
- Asociația Independent Research, 58 Timișului, Sector 1, 012416 Bucharest, Romania
- Department of Biochemistry and Molecular Biology, University of Bucharest, 91-95 Spl. Independentei, 050095 Bucharest, Romania
| | - Iuliana Pasuk
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
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al Janabi B, Reigosa F, Alberdi G, Ortigueira JM, Vila JM. An Innovative Structural Rearrangement in Imine Palladacycle Metaloligand Chemistry: From Single-Nuclear to Double-Nuclear Pseudo-Pentacoordinated Complexes. Molecules 2023; 28:molecules28052328. [PMID: 36903573 PMCID: PMC10005383 DOI: 10.3390/molecules28052328] [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: 01/31/2023] [Revised: 02/23/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
Treatment of the double nuclear complex 1a, di-μ-cloro-bis[N-(4-formylbenzylidene)cyclohexylaminato-C6, N]dipalladium, with Ph2PCH2CH2)2PPh (triphos) and NH4PF6 gave the single nuclear species 2a, 1-N-(cyclohexylamine)-4-N-(formyl)palladium(triphos)(hexafluorophasphate). Reaction of 2a with Ph2PCH2CH2NH2 in refluxing chloroform via a condensation reaction of the amine and formyl groups to produce the C=N double bond, gave 3a, 1-N-(cyclohexylamine)-4- N-(diphenylphosphinoethylamine)palladium(triphos)(hexafluorophasphate); a potentially bidentate [N,P] metaloligand. However, attempts to coordinate a second metal by treatment of 3a with [PdCl2(PhCN)2] were to no avail. Notwithstanding, complexes 2a and 3a left to stand in solution spontaneously self-transformed to give in either case the double nuclear complex 10, 1,4-N,N-terephthalylidene(cyclohexilamine)-3,6-[bispalladium(triphos)]di(hexafluorophosphate), after undergoing further metalation of the phenyl ring, then bearing two mutually trans [Pd(Ph2PCH2CH2)2PPh)-P,P,P] moieties: an unprecedented and serendipitous result indeed. On the other hand, reaction of the double nuclear complex 1b, di-μ-cloro-bis[N-(3-formylbenzylidene)cyclohexylaminato-C6, N]dipalladium, with Ph2PCH2CH2)2PPh (triphos) and NH4PF6 gave the single nuclear species 2b, 1-N-(cyclohexylamine)-4-N-(formyl)palladium(triphos)(hexafluorophasphate), Treatment of 2b with H2O/glacial MeCOOH gave cleavage of the C=N double bond and of the Pd···N interaction, yielding 5b, isophthalaldehyde-6-palladium(triphos)hexafluorophosphate, which then reacted with Ph2P(CH2)3NH2 to yield complex 6b, N,N-(isophthalylidene(diphenylphosphinopropylamine)-6-(palladiumtriphos)di(hexafluorophosphate), with two pairs of non-coordinated nitrogen and phosphorus donor atoms. Treatment of 6b with [PdCl2(PhCN)2], [PtCl2(PhCN)2], or [PtMe2(COD)] gave the new double nuclear complexes 7b, 8b and 9b, palladiumdichloro-, platinumdichloro- and platinumdimethyl[N,N-(isophthalylidene(diphenylphosphinopropylamine)-6-(palladiumtriphos)(hexafluorophosphate)-P,P], respectively, showing the behavior of 6b as a palladated bidentate [P,P] metaloligand. The complexes were fully characterized by microanalysis, IR, 1H, and 31P NMR spectroscopies, as appropriate. The X-ray single-crystal analyses for compounds 10 and 5b have been previously described as the perchlorate salts by JM Vila et al.
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Geyl KK, Baykov SV, Kasatkina SO, Savko PY, Boyarskiy VP. Reaction of coordinated isocyanides with substituted N-(2-pyridyl) ureas as a route to new cyclometallated Pd(II) complexes. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ilincă TA, Chiriac LF, Ilis M, Manaila-Maximean D, Ganea PC, Pasuk I, Cîrcu V. Effect of disubstitution pattern of the terminal alkyl chains on the mesophase of liquid crystals based on lanthanide(III) complexes: A study of the thermal, emission and dielectric behavior. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tudor CA, Iliş M, Secu M, Ferbinteanu M, Cîrcu V. Luminescent heteroleptic copper(I) complexes with phosphine and N-benzoyl thiourea ligands: Synthesis, structure and emission properties. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115542] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Reigosa F, López‑Torres M, Munín‑Cruz P, Ortigueira JM, Adams H, Teresa Pereira M, Vila JM. A crystal structural analysis discloses the singular shift of an acetylacetonate-derived cyclopalladated complex to the dinuclear chloro-bridged precursor. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mitrea DG, Cîrcu V. Synthesis and characterization of novel acylthiourea compounds used in ions recognition and sensing in organic media. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 258:119860. [PMID: 33957447 DOI: 10.1016/j.saa.2021.119860] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/10/2021] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
A series of novel N-acyl-N'-aryl thiourea derivatives were designed and prepared with the aim to develop dual responsive receptors for anions and cations. The structure of the new products was confirmed by NMR spectroscopy (13C and 1H), elemental analysis, and IR spectroscopy. Their thermal stability was studied by thermogravimetric analysis (TG) and it was found that these acyl thiourea derivatives are stable up to 160 °C. The ion recognition and sensing properties of the acyl thiourea compounds were investigated by UV-VIS absorption spectroscopy in organic media upon the addition of various salts. The UV-VIS studies revealed that these acyl thiourea derivatives are able to sense biological important ions such as fluoride and copper (II) ions.
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Affiliation(s)
- Daiana G Mitrea
- Department of Inorganic Chemistry, University of Bucharest, 23 Dumbrava Rosie st, sector 2, Bucharest 020464, Romania
| | - Viorel Cîrcu
- Department of Inorganic Chemistry, University of Bucharest, 23 Dumbrava Rosie st, sector 2, Bucharest 020464, Romania.
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Andelescu A, Heinrich B, Spirache MA, Voirin E, La Deda M, Di Maio G, Szerb EI, Donnio B, Costisor O. Playing with Pt
II
and Zn
II
Coordination to Obtain Luminescent Metallomesogens. Chemistry 2020; 26:4850-4860. [DOI: 10.1002/chem.202000124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Indexed: 01/09/2023]
Affiliation(s)
- Adelina‐Antonia Andelescu
- “Coriolan Dragulescu” Institute of ChemistryRomanian Academy 24 Mihai Viteazu Bvd. 300223 Timisoara Romania
| | - Benoît Heinrich
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)UMR7504CNRS-Université de Strasbourg 67034 Strasbourg France
| | - Maria Angela Spirache
- “Coriolan Dragulescu” Institute of ChemistryRomanian Academy 24 Mihai Viteazu Bvd. 300223 Timisoara Romania
| | - Emilie Voirin
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)UMR7504CNRS-Université de Strasbourg 67034 Strasbourg France
| | - Massimo La Deda
- Dipartimento di Chimica e Tecnologie ChimicheUniversità della Calabria via P. Bucci, Cubo 14/C 87036 Arcavacata di Rende (CS) Italy
| | - Giuseppe Di Maio
- Dipartimento di Chimica e Tecnologie ChimicheUniversità della Calabria via P. Bucci, Cubo 14/C 87036 Arcavacata di Rende (CS) Italy
| | - Elisabeta I. Szerb
- “Coriolan Dragulescu” Institute of ChemistryRomanian Academy 24 Mihai Viteazu Bvd. 300223 Timisoara Romania
| | - Bertrand Donnio
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)UMR7504CNRS-Université de Strasbourg 67034 Strasbourg France
| | - Otilia Costisor
- “Coriolan Dragulescu” Institute of ChemistryRomanian Academy 24 Mihai Viteazu Bvd. 300223 Timisoara Romania
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Saeed A, Mustafa MN, Zain-ul-Abideen M, Shabir G, Erben MF, Flörke U. Current developments in chemistry, coordination, structure and biological aspects of 1-(acyl/aroyl)-3- (substituted)thioureas: advances Continue …. J Sulphur Chem 2018. [DOI: 10.1080/17415993.2018.1551488] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Aamer Saeed
- Department of Chemistry, Quaid-i-Azam University-45320, Islamabad, Pakistan
| | | | | | - Ghulam Shabir
- Department of Chemistry, Quaid-i-Azam University-45320, Islamabad, Pakistan
| | - Mauricio F. Erben
- CEQUINOR (UNLP, CONICET-CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata La Plata, República Argentina
| | - Ulrich Flörke
- Department Chemie, Fakultät für Naturwissenschaften, Universität Paderborn Paderborn, Germany
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Chen Z, Fan Y, Wang J, Yang L, Zhang S. Penta-Nuclear Fe(III) Cluster: Synthesis, Structure, Magnetic Properties and Hirshfeld Surface Analysis. ChemistrySelect 2018. [DOI: 10.1002/slct.201801968] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Zhonghang Chen
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials(College of Chemistry and Bioengineering); Guilin University of Technology; Guilin 541004, P. R. China
| | - Yipeng Fan
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials(College of Chemistry and Bioengineering); Guilin University of Technology; Guilin 541004, P. R. China
| | - Jiming Wang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials(College of Chemistry and Bioengineering); Guilin University of Technology; Guilin 541004, P. R. China
| | - Li Yang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials(College of Chemistry and Bioengineering); Guilin University of Technology; Guilin 541004, P. R. China
| | - Shuhua Zhang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials(College of Chemistry and Bioengineering); Guilin University of Technology; Guilin 541004, P. R. China
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Discotic Liquid Crystals Based on Cu(I) Complexes with Benzoylthiourea Derivatives Containing a Perfluoroalkyl Chain. J CHEM-NY 2018. [DOI: 10.1155/2018/7943763] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Mesomorphic three-coordinate copper(I) complexes ([Cu(BTU)2X], where X = Cl or Br) based on a new N-benzoylthiourea (BTU) ligand with two decyloxy and one perfluorooctyl groups at its periphery were designed and prepared. The BTU ligand coordinates via the S atom in a neutral monodentate fashion as confirmed by IR and NMR spectroscopy data. The liquid crystalline behavior of these copper(I) complexes was investigated by a combination of polarized optical microscopy (POM), differential scanning calorimetry (DSC), and X-ray diffraction analysis (XRD), while their thermal stability was studied by thermogravimetric analysis (TGA). These new copper(I) complexes have mesomorphic properties and exhibit a hexagonal columnar mesophase over a large temperature range, more than 100°C.
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Iliş M, Micutz M, Pasuk I, Staicu T, Cîrcu V. Synthesis and liquid crystalline properties of novel fluorinated N-benzoyl thiourea compounds. Effect of perfluoroalkyl chains on the thermal behavior and smectic phases stability. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.10.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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15
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Tuning the liquid crystalline properties of palladium(II) metallomesogens: A study of rod-like to disc-like transition in cyclopalladated complexes with N-benzoyl thiourea derivatives. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Iliş M, Micutz M, Cîrcu V. Luminescent palladium(II) metallomesogens based on cyclometalated Schiff bases and N -benzoyl thiourea derivatives as co-ligands. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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