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Metal‐Ion Permeation in Congested Nanochannels: The Exposure Effect of Ag + Ions on the Phosphorescent Properties of a Gold(I)–Pyrazolate Complex that is Confined in the Nanoscopic Channels of Mesoporous Silica
Author(s) -
Lintang Hendrik O.,
Kinbara Kazushi,
Yamashita Takashi,
Aida Takuzo
Publication year - 2012
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201200041
Subject(s) - mesoporous silica , luminescence , materials science , photoexcitation , nanocomposite , nanoscopic scale , phosphorescence , ion , tetrahydrofuran , x ray photoelectron spectroscopy , mesoporous material , analytical chemistry (journal) , photochemistry , nanotechnology , chemical engineering , chemistry , excitation , fluorescence , organic chemistry , optoelectronics , optics , physics , solvent , electrical engineering , engineering , catalysis
An organometallic/silica nanocomposite of a 1D cylindrical assembly of a trinuclear gold(I)–pyrazolate complex ([Au 3 Pz 3 ]) that was confined inside the nanoscopic channels of hexagonal mesoporous silica ([Au 3 Pz 3 ]/silica hex ), emitted red light with a luminescence center at 693 nm upon photoexcitation at 276 nm owing to a Au I Au I metallophilic interaction. When a film of [Au 3 Pz 3 ]/silica hex was dipped into a solution of Ag + in tetrahydrofuran (THF), the resulting nanocomposite material (Ag@[Au 3 Pz 3 ]/silica hex ) emitted green light with a new luminescence center at 486 nm, which was characteristic of a Au I Ag I heterometallic interaction. Changes in the emission/excitation and XPS spectra of Ag@[Au 3 Pz 3 ]/silica hex revealed that Ag + ions permeated into the congested nanochannels of [Au 3 Pz 3 ]/silica hex , which were filled with the cylindrical assembly of [Au 3 Pz 3 ].