Das, Sanjib ; Bharadwaj, Parimal K. (2006) Water clusters gather luminescent Zinc(II) complexes around hydrogen-bonded framework structures and associated fluorescence modulation Crystal Growth & Design, 6 (1). pp. 187-192. ISSN 1528-7483
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Official URL: http://pubs.acs.org/doi/abs/10.1021/cg050263a
Related URL: http://dx.doi.org/10.1021/cg050263a
Abstract
Luminescent complexes [Zn(phen)(dca)2] (1) and [Zn(bpy)(aba)2] (2) (phen = 1,10-phenanthroline, dca = 4-dimethylamino cinnamate, bpy = 2,2'-bipyridyl, aba = 4-dimethylamino benzoate) are formed readily at room temperature when the reactants are allowed to react in a 1:1:2 molar ratio. Complex 1 self-assembles into a hydrogen-bonded framework structure in aqueous ethanol to form {[Zn(phen)(dca)2]·3H2O·EtOH}n (3), in which four complex units gather around tetrameric water clusters. Similarly, complex 2 forms a different hydrogen-bonded framework structure with the empirical formula {[Zn(bpy)(aba)2]·4H2O}n (4), in which octameric water clusters assemble [Zn(bpy)(aba)2] complex units. Compounds 3 and 4 exhibit significant red shifts of the emission bands with respect to 1 and 2, respectively. On heating, compound 3 loses water to form 1 and then later upon recrystallization from aqueous ethanol forms 3 as monitored by X-ray powder patterns. Similarly, the transformation between 2 and 4 is also reversible.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 4716 |
| Deposited On: | 18 Oct 2010 06:59 |
| Last Modified: | 18 May 2011 08:13 |
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