کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1311674 | 975343 | 2007 | 8 صفحه PDF | دانلود رایگان |
The photophysical properties of 1,1′-dimethyl-4,4′dipyridinium (methyl viologen, MV2+) intercalated within zirconium phosphate (ZrP) were investigated. The intercalation of MV2+ within ZrP was achieved by ion-exchange using a hydrated form of ZrP with six water molecules per formula unit and an interlayer distance of 10.3 Å. The intercalation yields a new phase with an interlayer distance up to 10.6 Å. The MV2+-exchanged ZrP material was characterized using elemental analysis, XRPD and IR data. The MV2+-exchanged ZrP materials show a red shift in the UV–Vis spectra in contrast with solution. The photoexcitation of nitrogen purged, MV2+-exchanged ZrP water suspensions with UV light leads to fluorescence emission with a maximum at 337 nm. The photoexcitation of MV2+-exchanged ZrP suspensions without nitrogen purging yields two fluorescence emissions with maxima at 337 and 450 nm. The emission in the visible region can be attributed to a photodecomposition product. The fluorescence quantum yields indicate that the emission of MV2+-exchanged ZrP is of the same order of magnitude as that of MV2+ in water indicating a strong deactivation of the excited state by non-radiative pathways.
1,1′-Dimethyl-4,4′ dipyridinium (methyl viologen, MV2+) has been intercalated within layered zirconium phosphate (ZrP) producing a new phase with an interlayer distance of 10.6 Å. MV2+-exchanged ZrP is fluorescent and the presence of oxygen promotes emission from photodecomposition products.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 360, Issue 5, 1 April 2007, Pages 1535–1542