Kishore, Ravada ; Tripuramallu, Bharat Kumar ; Durgaprasad, Gummadi ; Das, Samar K. (2011) Ion-pair charge transfer complex with near-IR absorption: Synthesis, crystal structure and properties of [Hb]2[Cu(mnt)2] (Hb = 1-(4-((1H-imidazol-1-yl)methyl)benzyl)-1H-imidazol-3-ium) Journal of Molecular Structure, 990 (1-3). pp. 37-43. ISSN 0022-2860
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.molstruc.2010.12.053
Abstract
The compound [Hb]2[Cu(mnt)2] (1) [Hb = 1-(4-((1H-imidazol-1-yl)methyl)benzyl)-1H-imidazol-3-ium] has been synthesized, starting from 1,4-bis((1H-imidazol-1-yl)methyl)benzene, cupric chloride, and Na2mnt in methanol. Compound 1 crystallizes in monoclinic system with C2/c space group. In the crystal structure, the interactions between cations and anions via bifurcated C—H···(NC-mnt)2 hydrogen bonds give rise to a two dimensional supramolecular network. It has also been observed that two cation moieties (Hb) are attached together by a very short C—H···N hydrogen bonding interaction with H...N distance of 1.74 Å, ∠ CHN bond angle of 174.9°. Compound 1 is additionally characterized by cyclic voltammetry, UV-Vis, IR, 1H NMR and EPR spectroscopy. The ion-pair compound 1 shows an intense absorption in the near-IR region at ~1214 nm which has been described as a charge transfer band from HOMO of the copper dithiolate anion [Cu(mnt)2]2-, to LUMO of the [Hb]+ cation. The title compound exhibits an oxidative response at +0.46 V vs. Ag/AgCl and a reductive event at -0.67 V vs. Ag/AgCl.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Ion-pair Complex; Near-IR Absorption; Crystal Structure; Supramolecular Chemistry |
| ID Code: | 63440 |
| Deposited On: | 29 Sep 2011 04:35 |
| Last Modified: | 29 Sep 2011 04:35 |
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