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A non-aqueous SERS study of the 2,2′-bipyridine free ligand and the tris(bpy) Ru(II) complex reduction products

✍ Scribed by C.D. Tait; T.M. Vess; D.W. Wertz

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
554 KB
Volume
142
Category
Article
ISSN
0009-2614

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✦ Synopsis

The surface-enhanced Raman spectrum (SERS) of 2,2'-bipyridine (bpy) in DMF solvent as a function of exciting line indicates that the enhancement peaks with excitation near 19 X IO3 cm-'. Also, a shift in vibrational frequencies occurs as the potential is varied from -0.8 to -1.8 V versus AglAgCI, with the ligand appearing to desorb from the electrode near (but prior to) the reduction potential of bipyridine. With this free ligand background information, the SERS of [ Ru( bpy),]*-" is re-investigated. At exciting lines in resonance with bipyridine anion II to A* transitions, evidence for both reduced and unreduced ligand vibrations (the frequencies of which are only slightly potential dependent) are observed.

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Synthesis, Characterization, and DNA Int
Synthesis, Characterization, and DNA Interaction Studies of the Ruthenium(II) Complexes [Ru(bpy)2(ipbp)]2+ and [Ru(ipbp)(phen)2]2+ (ipbp=3-(1H-Imidazo[4,5-f][1,10]phenanthrolin-2-yl)-4H-1-benzopyran-2-one; bpy=2,2′-Bipyridine; phen=1,10-Phenanthroline)
✍ Yun-Jun Liu; Hui Chao; Jun-Hua Yao; Hong Li; Yi-Xian Yuan; Liang-Nian Ji 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 German ⚖ 164 KB 👁 1 views

## Abstract A novel ligand 3‐(1__H__‐imidazo[4,5‐__f__][1,10]phenanthrolin‐2‐yl)‐4__H__‐1‐benzopyran‐4‐one (ipbp) and its ruthenium(II) complexes [Ru(bpy)~2~(ipbp)]^2+^ (**1**) and [Ru(ipbp)(phen)~2~]^2+^ (**2**) (bpy=2,2′‐bipyridine, phen=1,10‐phenanthroline) were synthesized and characterized by