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Monzón González CR, Sánchez Vergara ME, Elías-Espinosa MC, Rodríguez-Valencia SA, López-Mayorga BJ, Castillo-Arroyave JL, Toscano RA, Flores OL, Álvarez Toledano C. Design of Promising Uranyl(VI) Complexes Thin Films with Potential Applications in Molecular Electronics. ChemistryOpen 2024:e202300219. [PMID: 38180301 DOI: 10.1002/open.202300219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/07/2023] [Indexed: 01/06/2024] Open
Abstract
In this work, it is proposed the development of organic semiconductors (OS) based on uranyl(VI) complexes. The above by means of the synthesis and the characterization of the complexes by Infrared spectroscopy, Nuclear magnetic resonance spectroscopy, mass spectrometry, and X-ray diffraction. Films of these complexes were deposited and subsequently, topographic and structural characterization was carried out by Scanning Electron Microscopy, X-ray diffraction, and Atomic Force Microscopy. Additionally, the nanomechanical evaluation was performed to know the stiffness of uranyl films using their modulus of elasticity. Also, the optical characterization took place in the devices and their bandgap value ranges between 2.40 and 2.93 eV being the minor for the film of the uranyl complex with the N on pyridine in position 4 (2 c). Finally, the electrical behavior of the uranyl(VI) films was evaluated, and important differences were obtained: the uranyl complex with the N on pyridine in position 2 (2 a) film is not influenced by changes in lighting and its current density is in the order of 10-3 A/cm2 . The film with uranyl complex with the N on pyridine in position 3 (2 b) and 2 c presents a greater current flow under lighting conditions and two orders of magnitude larger than in film 2 a. In these films 2 b and 2 c, ohmic behavior occurs at low voltages, while at high voltages the charge transport changes to space-charge limited current behavior.
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Affiliation(s)
- César Raúl Monzón González
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior s/n. C.U., Delegación Coyoacán, C.P., 04510, Ciudad de México, México
| | - María Elena Sánchez Vergara
- Facultad de Ingeniería, Universidad Anáhuac México, Avenida Universidad Anáhuac 46, Col. Lomas Anáhuac, Huixquilucan, Estado de México, 52786, México
| | - Milton Carlos Elías-Espinosa
- Tecnológico de Monterrey, Escuela de Ingeniería y Ciencias, Av. Carlos Lazo 100, Santa Fe, La Loma, Ciudad de México, México, 01389
- Tecnológico de Monterrey, Escuela de Ingeniería y Ciencias, Calle del Puente, Ejidos de Huipulco, Tlalpan, Ciudad de México, México, 14380
| | - Sergio Arturo Rodríguez-Valencia
- Tecnológico de Monterrey, Escuela de Ingeniería y Ciencias, Carr. Lago de Guadalupe Km. 3.5, Col. Margarita Maza de Juárez, Atizapán de Zaragoza, Estado de México, México, 52926
| | - Byron José López-Mayorga
- Escuela de Química, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, 11 avenida, Ciudad de Guatemala, Guatemala, 01012
| | - José León Castillo-Arroyave
- Escuela de Química, Facultad de Ciencias Químicas y Farmacia, Universidad de San Carlos de Guatemala, 11 avenida, Ciudad de Guatemala, Guatemala, 01012
| | - Rubén Alfredo Toscano
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior s/n. C.U., Delegación Coyoacán, C.P., 04510, Ciudad de México, México
| | - Octavio Lozada Flores
- Facultad de Ingeniería, Universidad Panamericana, Augusto Rodin 498, Ciudad de México, 03920, México
| | - Cecilio Álvarez Toledano
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior s/n. C.U., Delegación Coyoacán, C.P., 04510, Ciudad de México, México
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Glasneck F, Roode-Gutzmer QI, Stumpf T, Kersting B. Tetra-substituted p-tert-butylcalix[4]arene with phosphoryl and salicylamide functional groups: synthesis, complexation and selective extraction of f-element cations. Chemistry 2021; 28:e202104301. [PMID: 34957610 PMCID: PMC9306641 DOI: 10.1002/chem.202104301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Indexed: 11/08/2022]
Abstract
A new series of lanthanide ( 1-5 ) and uranyl ( 6 ) complexes with a tetra-substituted bifunctional calixarene ligand H 2 L is described. The coordination environment for the Ln 3+ and UO 2 2+ ions is provided by phosphoryl and salicylamide functional groups appended to the lower rim of the p-tert -butylcalix[4]arene scaffold. Ligand interactions with lanthanide cations (light: La 3+ , Pr 3+ ; intermediate: Eu 3+ and Gd 3+ ; and heavy: Yb 3+ ), as well as the uranyl cation (UO 2 2+ ) is examined in the solution and solid state, respectively with spectrophotometric titration and single crystal X-ray diffractometry. The ligand is fully deprotonated in the complexation of trivalent lanthanide ions forming di-cationic complexes 2:2 M: L , [Ln 2 ( L ) 2 (H 2 O)] 2+ ( 1 - 5 ), in solution, whereas uranyl formed a 1:1 M: L complex [UO 2 ( L )(MeOH)] ∞ ( 6 ) that demonstrated very limited solubility in 12 organic solvents. Solvent extraction behaviour is examined for cation selectivity and extraction efficiency. H 2 L was found to be an effective extracting agent for UO 2 2+ over La 3+ and Yb 3+ cations. The separation factors at pH 6.0 are: [[EQUATION]] = 121.0 and [[EQUATION]] = 70.0.
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Affiliation(s)
- Florian Glasneck
- University of Leipzig Faculty of Chemistry and Mineralogy: Universitat Leipzig Fakultat fur Chemie und Mineralogie, Institute of Inorganic Chemistry, GERMANY
| | | | - Thorsten Stumpf
- HZDR: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, GERMANY
| | - Berthold Kersting
- Universitat Leipzig, Institut für Anorganische Chemie, Johannisallee 29, 4103, Leipzig, GERMANY
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