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 |
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| Authors: | Dr Hendrik O Lintang Prof Dr Kazushi Kinbara Prof Dr Takashi Yamashita Prof Dr Takuzo Aida |
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| Institution: | 1. Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor (Malaysia), Fax: (+60)?7‐5536080;2. Department of Chemistry and Biotechnology, School of Engineering and Center for NanoBio Integration, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113–8656 (Japan);3. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2‐1‐1 Katahira, Aoba‐ku, Sendai 980‐8577 (Japan);4. Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278–8510 (Japan) |
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| Abstract: | An organometallic/silica nanocomposite of a 1D cylindrical assembly of a trinuclear gold(I)–pyrazolate complex (Au3Pz3]) that was confined inside the nanoscopic channels of hexagonal mesoporous silica (Au3Pz3]/silicahex), emitted red light with a luminescence center at 693 nm upon photoexcitation at 276 nm owing to a AuI? AuI metallophilic interaction. When a film of Au3Pz3]/silicahex was dipped into a solution of Ag+ in tetrahydrofuran (THF), the resulting nanocomposite material (Ag@Au3Pz3]/silicahex) emitted green light with a new luminescence center at 486 nm, which was characteristic of a AuI? AgI heterometallic interaction. Changes in the emission/excitation and XPS spectra of Ag@Au3Pz3]/silicahex revealed that Ag+ ions permeated into the congested nanochannels of Au3Pz3]/silicahex, which were filled with the cylindrical assembly of Au3Pz3]. |
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| Keywords: | mesoporous materials nanostructures phosphorescence silicates silver |
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