Moragues Pons, ME.; Esteban Moreno, J.; Ros-Lis, JV.; Martínez Mañez, R.; Marcos Martínez, MD.; Martínez, M.; Soto Camino, J.... (2011). Sensitive and selective chromogenic sensing of carbon monoxide via reversible axial CO coordination in binuclear rhodium complexes. Journal of the American Chemical Society. 133:15762-15772. https://doi.org/10.1021/ja206251r
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/28680
Title:
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Sensitive and selective chromogenic sensing of carbon monoxide via reversible axial CO coordination in binuclear rhodium complexes
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Author:
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Moragues Pons, María Esperanza
Esteban Moreno, Julio
Ros-Lis, José Vicente
Martínez Mañez, Ramón
Marcos Martínez, María Dolores
Martínez, Manuel
Soto Camino, Juan
Sancenón Galarza, Félix
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UPV Unit:
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Universitat Politècnica de València. Departamento de Química - Departament de Química
Universitat Politècnica de València. Instituto de Reconocimiento Molecular y Desarrollo Tecnológico - Institut de Reconeixement Molecular i Desenvolupament Tecnològic
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Issued date:
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Abstract:
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The study of probes for CO sensing of a family of binuclear rhodium(II) compounds of general formula [Rh 2{(XC 6H 3)P(XC 6H 4)} n(O 2CR) 4-n]·L 2 containing one or two metalated phosphines (in a head-to-tail arrangement) ...[+]
The study of probes for CO sensing of a family of binuclear rhodium(II) compounds of general formula [Rh 2{(XC 6H 3)P(XC 6H 4)} n(O 2CR) 4-n]·L 2 containing one or two metalated phosphines (in a head-to-tail arrangement) and different axial ligands has been conducted. Chloroform solutions of these complexes underwent rapid color change, from purple to yellow, when air samples containing CO were bubbled through them. The binuclear rhodium complexes were also adsorbed on silica and used as colorimetric probes for "naked ey" CO detection in the gas phase. When the gray-purple colored silica solids containing the rhodium probes were exposed to air containing increasing concentrations of CO, two colors were observed, in agreement with the formation of two different products. The results are consistent with an axial coordination of the CO molecule in one axial position (pink-orange) or in both (yellow). The crystal structure of 3·(CO) ([Rh 2{(C 6H 4)P(C 6H 5) 2} 2(O 2CCF 3) 2]·CO) was solved by single X-ray diffraction techniques. In all cases, the binuclear rhodium complexes studied showed a high selective response to CO with a remarkable low detection limit. For instance, compound 5· (CH 3CO 2H) 2 ([Rh 2{(m- CH 3C 6H 3)P(m-CH 3C 6H 4) 2} 2(O 2CCH 3) 2]· (CH 3CO 2H) 2) is capable of detection of CO to the "naked ey" at concentrations as low as 0.2 ppm in air. Furthermore, the binding of CO in these rhodium complexes was found to be fully reversible, and release studies of carbon monoxide via thermogravimetric measurements have also been carried out. The importance of the silica support for the maintenance of the CO-displaced L ligands in the vicinity of the probes in a noninnocent manner has been also proved. © 2011 American Chemical Society.
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Subjects:
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Air samples
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Axial coordination
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Axial ligand
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Axial positions
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Chloroform solutions
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CO detection
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CO molecule
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CO sensing
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Color changes
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Gasphase
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Low detection limit
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Rhodium complexes
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Silica supports
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Thermogravimetric measurement
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Two-color
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X-ray diffraction techniques
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Air quality
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Carbon dioxide
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Carbon monoxide
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Chromium compounds
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Color
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Colorimetry
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Crystal structure
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Ligands
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Phosphorus compounds
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Probes
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Rhodium
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Silica
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X ray diffraction
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Rhodium compounds
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Binuclear rhodium complex
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Chloroform
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Phosphine
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Rhodium complex
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Silicon dioxide
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Unclassified drug
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Article
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Carbon monoxide sensing
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Chemical binding
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Chemical procedures
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Kinetics
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Limit of detection
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Thermogravimetry
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Air
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Chemistry Techniques, Analytical
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Drug Design
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Organometallic Compounds
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Copyrigths:
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Cerrado |
Source:
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Journal of the American Chemical Society. (issn:
0002-7863
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DOI:
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10.1021/ja206251r
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Publisher:
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American Chemical Society
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Publisher version:
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http://dx.doi.org/10.1021/ja206251r
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Project ID:
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info:eu-repo/grantAgreement/MICINN//MAT2009-14564-C04-01/ES/Nanomateriales Hibridos Para El Desarrollo De "Puertas Moleculares" De Aplicacion En Procesos De Reconocimiento Y Terapeutica Y Para La Deteccion De Explosivos./
info:eu-repo/grantAgreement/Generalitat Valenciana//PROMETEO09%2F2009%2F016/ES/Ayuda prometeo 2009 para el grupo de diseño y desarrollo de sensores/
info:eu-repo/grantAgreement/MICINN//CTQ2009-14443-C02-02/ES/
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Thanks:
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The authors wish to express their gratitude to the Spanish Ministerio de Ciencia y e Innovacion (projects MAT2009-14564-C04-01 and CTQ2009-14443-C02-02) and Generalitat Valenciana (project PROMETEO/2009/016) for their ...[+]
The authors wish to express their gratitude to the Spanish Ministerio de Ciencia y e Innovacion (projects MAT2009-14564-C04-01 and CTQ2009-14443-C02-02) and Generalitat Valenciana (project PROMETEO/2009/016) for their support. MEM is grateful to the Spanish Ministerio de Ciencia e Innovacion for an FPU grant.
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Type:
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Artículo
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