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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; 13:e202300219. [PMID: 38180301 PMCID: PMC11164027 DOI: 10.1002/open.202300219] [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: 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 QuímicaUniversidad Nacional Autónoma de MéxicoCircuito Exterior s/n. C.U.Delegación Coyoacán, C.P.04510Ciudad de MéxicoMéxico
| | - María Elena Sánchez Vergara
- Facultad de IngenieríaUniversidad Anáhuac MéxicoAvenida Universidad Anáhuac 46, Col. Lomas AnáhuacHuixquilucanEstado de México52786México
| | - Milton Carlos Elías‐Espinosa
- Tecnológico de MonterreyEscuela de Ingeniería y CienciasAv. Carlos Lazo 100Santa Fe, La LomaCiudad de MéxicoMéxico01389
- Tecnológico de MonterreyEscuela de Ingeniería y CienciasCalle del PuenteEjidos de Huipulco, TlalpanCiudad de MéxicoMéxico14380
| | - Sergio Arturo Rodríguez‐Valencia
- Tecnológico de MonterreyEscuela de Ingeniería y CienciasCarr. Lago de Guadalupe Km. 3.5, Col. Margarita Maza de JuárezAtizapán de ZaragozaEstado de MéxicoMéxico52926
| | - Byron José López‐Mayorga
- Escuela de QuímicaFacultad de Ciencias Químicas y FarmaciaUniversidad de San Carlos de Guatemala11 avenidaCiudad de GuatemalaGuatemala01012
| | - José León Castillo‐Arroyave
- Escuela de QuímicaFacultad de Ciencias Químicas y FarmaciaUniversidad de San Carlos de Guatemala11 avenidaCiudad de GuatemalaGuatemala01012
| | - Rubén Alfredo Toscano
- Instituto de QuímicaUniversidad Nacional Autónoma de MéxicoCircuito Exterior s/n. C.U.Delegación Coyoacán, C.P.04510Ciudad de MéxicoMéxico
| | - Octavio Lozada Flores
- Facultad de IngenieríaUniversidad PanamericanaAugusto Rodin 498Ciudad de México03920México
| | - Cecilio Álvarez Toledano
- Instituto de QuímicaUniversidad Nacional Autónoma de MéxicoCircuito Exterior s/n. C.U.Delegación Coyoacán, C.P.04510Ciudad de MéxicoMéxico
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DiMucci IM, Root HD, Jones ZR, Kozimor SA, MacInnes MM, Miller JL, Mocko V, Oldham WJ, Stein BW. Photochemical separation of plutonium from uranium. Chem Commun (Camb) 2022; 58:10961-10964. [PMID: 36083292 DOI: 10.1039/d2cc04225h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Plutonium-based technologies would benefit if chemical hazards for purifying plutonium were reduced. One critical processing step where improvements could be impactful is the adjustment of plutonium oxidation-states during separations. This transformation often requires addition of redox agents. Unfortunately, many of the redox agents used previously cannot be used today because their properties are deemed incompatible with modern day processing facilities and waste stream safety requirements. We demonstrated herein that photochemistry can be used as an alternative to those chemical agents. We observed that (1) Pu4+ → Pu3+ and UO22+ → U4+ photoreduction proceeded in HCl(aq) and HNO3(aq) and (2) photogenerated Pu3+(aq) and U4+(aq) could be separated using anion exchange chromatography (high yield, >90%; good separation factor, 322).
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Affiliation(s)
- Ida M DiMucci
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Harrison D Root
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Zachary R Jones
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Stosh A Kozimor
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Molly M MacInnes
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Jeffrey L Miller
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Veronika Mocko
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Warren J Oldham
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
| | - Benjamin W Stein
- Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, NM, 87544, USA.
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Deka H, Fridman N, Koneczny M, Tamm M, Eisen MS. Base-free transfer hydrogenation of aldehydes and ketones catalyzed by imidazolin-2-iminato actinide complexes. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01362b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of thorium and uranium complexes decorated with unsymmetrical imidazolin-2-iminato ligands were found to be effective as catalysts in the transfer hydrogenation of aldehydes and ketones with 2-propanol to form the corresponding alcohols.
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Affiliation(s)
- Hemanta Deka
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa, 3200008, Israel
| | - Natalia Fridman
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa, 3200008, Israel
| | - Marvin Koneczny
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Brauschweig, Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Brauschweig, Germany
| | - Moris S. Eisen
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa, 3200008, Israel
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