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Spatially Confined Functionalization of Transparent NiO Thin Films with a Luminescent (1,10‐Phenanthroline)tris(2‐thenoyltrifluoroacetonato)europium Monolayer
Author(s) -
Smecca Emanuele,
Tudisco Cristina,
Giuffrida Antonino E.,
Catalano Maria R.,
Speghini Adolfo,
Malandrino Graziella,
Condorelli Guglielmo G.
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402479
Subject(s) - europium , chemistry , non blocking i/o , luminescence , x ray photoelectron spectroscopy , phenanthroline , surface modification , tris , ligand (biochemistry) , photochemistry , lanthanide , sputtering , inorganic chemistry , thin film , chemical engineering , organic chemistry , catalysis , ion , nanotechnology , materials science , optoelectronics , biochemistry , receptor , engineering
Transparent MOCVD‐grown NiO films have been functionalized with the luminescent (1,10‐phenanthroline)tris(2‐thenoyltrifluoroacetonato)europium(III) complex [Eu(TTA) 3 phen] by combining sputter activation with a solution synthetic route. To introduce the Eu complex only on selected regions, some areas of the NiO surface were activated by Ar + ion sputtering and then functionalized with 3‐phosphonopropionic acid (CPPA) followed by the anchoring of Eu(TTA) 3 phen through a ligand‐exchange reaction between β‐diketonato ligands and the carboxylic groups of CPPA. The functionalized material was characterized by X‐ray photoelectron, UV/Vis and luminescence spectroscopy. XPS measurements indicated that CPPA prefunctionalization and, in turn, the Eu(TTA) 3 phen anchoring occurs only on the sputter‐activated region, while no anchoring takes place on the unactivated surface. The optical properties of the Eu(TTA) 3 phen–NiO system were evaluated by UV/Vis and luminescence spectroscopy.