The cosolvent-dependent assembly of a family of three blue fluorescent lead(ii)-coordination polymers with 5-amino-2,4,6-tribromoisophthalic acid

Zhang, Kou-Lin and Chang, Yan and Zhang, Jing-Bo and Deng, Ye and Qiu, Ting-Ting and Li, Liang and Ng, Seik Weng (2012) The cosolvent-dependent assembly of a family of three blue fluorescent lead(ii)-coordination polymers with 5-amino-2,4,6-tribromoisophthalic acid. CrystEngComm, 14 (8). pp. 2926-2935. ISSN 1466-8033

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Official URL: https://doi.org/10.1039/c2ce06540a

Abstract

By modulating the synthetic strategy based on changing the cosolvent in the synthesis, the aqueous medium assembly of lead(ii) with H 2ATBIP in the presence of different cosolvents, N,N-dimethylacetamide (DMA), methanol (CH 3OH) or N,N-dimethylformamide (DMF), leads to a family of three lead(ii) coordination polymers: [Pb(ATBIP)(H 2O) 2] ·2H 2O (1), [Pb(ATBIP)(H 2O)(CH 3OH)] ·H 2O (2) and [Pb(ATBIP)(H 2O)(DMF)]·H 2O (3) [H 2ATBIP = 5-amino-2,4,6-tribromoisophthalic acid]. Complex 1 exhibits an interesting double chain structure with [Pb 2(OH 2) 2] as the secondary building unit (SBU), which further assembles into a 3D supramolecular framework through the C-Br⋯Br halogen bonds and hydrogen bonds. Furthermore, the discrete water octamer (H 2O) 8 is found. The cosolvents, DMF and CH 3OH, which simultaneously act as the coordinated small molecules, have significant influences on the formation of different crystalline architectures. Complex 2 features a 2D network constructed by the 2 1 helical carboxylate-bridged Pb(ii) chains [Pb 2(COO) 2] n (SBUs) linked by the ligand ATBIP 2-. The intralayer C-Br⋯Br halogen bond is found and a 3D supramolecular framework is formed by the interlayer hydrogen bonds. Complex 3 crystallizes in the chiral space group P4 12 12 and possesses a 2D (4,4)-homochiral layer built from the centrosymmetrical SBU [Pb 2(COO) 2] bridged by the ligand ATBIP 2-. The interlayer hydrogen bonds further extend the chiral layers in 3 into a 3D supramolecular homochiral framework. The coordination modes of the ligand ATBIP 2- are greatly dependent on the cosolvents. Complex 3 loses crystallinity in the air and forms the material [Pb(ATBIP)(DMF)] (3A). Thermal stability and solid state fluorescent properties of 1, 2 and 3A have been studied. The second harmonic generation (SHG) property of 3A is also studied. © 2012 The Royal Society of Chemistry.

Item Type: Article
Uncontrolled Keywords: Coordination polymers; Sonochemistry; Powder diffraction
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 22 Nov 2019 06:59
Last Modified: 22 Nov 2019 06:59
URI: http://eprints.um.edu.my/id/eprint/23093

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