RT info:eu-repo/semantics/article
T1 Non‐emissive RuII Polypyridyl Complexes as Efficient and Selective Photosensitizers for the Photooxidation of Benzylamines
A1 Yagüe Izquierdo, Cristina
A1 Echevarría Poza, Igor
A1 Vaquero Gutiérrez, Mónica
A1 Fidalgo Zorrilla, Jairo
A1 Carbayo Martín, Mª Aránzazu
A1 Jalón Sotés, Félix Ángel
A1 Lima, João C.
A1 Moro, Artur J.
A1 Manzano Manrique, Blanca Rosa
A1 Espino Ordóñez, Gustavo
K1 Photocatalysis
K1 Photooxidation of amines
K1 RuIIpolypyridyl complexes
K1 Singlet oxygen
K1 Sulfonamides
K1 Catálisis
K1 Catalysis
K1 Química inorgánica
K1 Chemistry, Inorganic
AB Five new RuII polypyridyl complexes bearing N-(arylsulfonyl)-8-amidoquinolate ligands and three of their biscyclometalated IrIII congeners have been prepared and employed as photocatalysts (PCs) in the photooxidation of benzylamines with O2. In particular, the new RuII complexes do not exhibit photoluminescence, rather they harvest visible light efficiently and are very stable in solution under irradiation with blue light. Their non-emissive behavior has been related to the low electrochemical energy gaps and rationalized on the basis of theoretical calculations (DFT analysis) that predict low S0←T1 energy values. Moreover, the RuII complexes, despite being non-emissive, display excellent activities in the selective photocatalytic transformation of benzylamines into the corresponding imines. The presence of an electron-withdrawing group (-CF3) on the arene ring of the N-(arylsulfonyl)-8-amidoquinolate ligand improves the photocatalytic activity of the corresponding photocatalyst. Furthermore, all the experimental evidence, including transient absorption spectroscopy measurements suggest that singlet oxygen is the actual oxidant. The IrIII analogues are considerably more photosensitive and consequently less efficient photosensitizers (PSs).
PB Wiley
SN 0947-6539
YR 2020
FD 2020-09
LK https://hdl.handle.net/10259/11336
UL https://hdl.handle.net/10259/11336
LA eng
NO We gratefully acknowledge the financial support provided bythe Spanish Ministerio de Ciencia, Innovación y Universidades(RTI2018-100709-B-C21 and CTQ (QMC)- RED2018-102471-T)and Junta de Castilla y León (BU087G19). M.V. is grateful forthe financial support received from the Consejería de Educa-ción-Junta de Castilla y León-FEDER (BU042U16-BU305P18).
DS Repositorio Institucional de la Universidad de Burgos
RD 28-may-2026