کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1308435 | 1499192 | 2013 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrochemiluminescent dinuclear Ru(II) complexes assembled with 1,1′-(1,2-ethynediyl)- or dimethlyene-bridged bis(bipyridine) ligands: Synthesis and photophysical and electrochemical properties Electrochemiluminescent dinuclear Ru(II) complexes assembled with 1,1′-(1,2-ethynediyl)- or dimethlyene-bridged bis(bipyridine) ligands: Synthesis and photophysical and electrochemical properties](/preview/png/1308435.png)
1,2-Di(2,2′-bipyridin-5-yl)ethane (BL1) and 1,2-di(2,2′-bipyridin-5-yl)ethyne (BL2) were synthesized as new bridging ligands and coordinated to (RuL2(acetone)2)(PF6)2 for the preparation of various [Ru(L)2(BL)Ru(L)2](PF6)4-type dinuclear ruthenium complexes (where BL = BL1, BL2 and L = bpy, o-phen, DTDP). The electrochemical redox potentials, spectroscopic properties, and relative electrochemiluminescence intensity of BL1 and BL2 were characterized and compared to those of well-known tris(1,10-phenanthroline)rutheniun(II) [Ru(o-phen)3](PF6)2] complex as a reference. Dinuclear Ru(II) complexes containing the conjugated bridging ligand (BL2) showed much more intense electrochemiluminescent responses than dinuclear Ru(II) complexes with the non-conjugated bridging ligand (BL1). Among the complexes with conjugated bridging ligands, [(DTDP)2Ru(bpy-CC-bpy)Ru(DTDP)2](PF6)4 exhibited enhanced ECL intensities as high as 3.6 times greater than that of the reference, [Ru(o-phen)3](PF6)2.
New bridging ligands, 1,2-di(2,2′-bipyridin-5-yl)ethane (BL1) and 1,2-di(2,2′-bipyridin-5-yl)ethyne (BL2) have been synthesized and coordinated to [RuL2(acetone)2](PF6)2 for various [Ru(L)2(BL)Ru(L)2](PF6)4 type dinuclear ruthenium complexes (where BL = BL1, BL2 and L = bpy, o-phen, DTDP). Their electrochemical redox potentials, spectroscopic properties and relative electrochemiluminescence were investigated in detail.Figure optionsDownload as PowerPoint slideHighlights
► Dinuclear Ru complexes containing new bridging ligands were synthesized.
► Spectroscopic properties and relative electrochemiluminescence were investigated.
► [(DTDP)2Ru(bpy-CC-bpy)Ru(DTDP)2](PF6)4 exhibited highly enhanced ECL intensity.
Journal: Inorganica Chimica Acta - Volume 395, 30 January 2013, Pages 145–150