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

• Main Authors: Lintang, H. O., Kinbara, K., Yamashita, T., Aida, T.
• Format: Article
• Published: WILEY-VCH Verlag GmbH 2012
• Subjects: QD Chemistry
• Online Access: http://eprints.utm.my/id/eprint/47205/; http://dx.doi.org/10.1002/asia.201200041
• Institution: Universiti Teknologi Malaysia

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)].