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Polymeric architectures of bismuth citrate based on dimeric building blocks.

ABSTRACT: Four bismuth complexes, (H2En)[Bi2(cit)2(H2O)4/3]·(H2O) x (1), (H2En)3[Bi2(cit)2Cl4]·(H2O) x (2), (HPy)2[Bi2(cit)2(H2O)8/5]·(H2O) x (3) and (H2En)[Bi2(cit)2](H2O) x (4) [cit = citrate4-; En = ethylenediamine; Py = pyridine] have been synthesized and crystallized. The crystal structures reveal that the basic building blocks in all of these complexes are bismuth citrate dimeric units which combine to form polymeric architectures. The embedded protonated ethylenediamine and pyridine moieties in the polymeric frameworks have been identified by X-ray crystallography and solid-state cross polarization/magic angle spinning (CP/MAS) 13C NMR. Based on the framework of complex 1, a structural model of a clinically used antiulcer drug, ranitidine bismuth citrate (RBC) was generated. The behavior of the protonated amine-bismuth citrate complexes in acidic aqueous solution has been studied by electrospray ionization-mass spectrometry (ESI-MS).

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Supplementary material is available for this article at 10.1007/s11426-010-4113-x and is accessible for authorized users.

SUBMITTER: Yang N 

PROVIDER: S-EPMC7088795 | biostudies-literature | 2010

REPOSITORIES: biostudies-literature

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Polymeric architectures of bismuth citrate based on dimeric building blocks.

Yang Nan N   An Yan Y   Cai JiWen J   Hu LiHong L   Zeng YiBo Y   Mao ZongWan Z   Chen GuanHua G   Sun HongZhe H  

Science China. Chemistry 20101027 10

Four bismuth complexes, (H<sub>2</sub>En)[Bi<sub>2</sub>(cit)<sub>2</sub>(H<sub>2</sub>O)<sub>4/3</sub>]·(H<sub>2</sub>O) <sub><i>x</i></sub> (<b>1</b>), (H<sub>2</sub>En)<sub>3</sub>[Bi<sub>2</sub>(cit)<sub>2</sub>Cl<sub>4</sub>]·(H<sub>2</sub>O) <sub><i>x</i></sub> (<b>2</b>), (HPy)<sub>2</sub>[Bi<sub>2</sub>(cit)<sub>2</sub>(H<sub>2</sub>O)<sub>8/5</sub>]·(H<sub>2</sub>O) <sub><i>x</i></sub> (<b>3</b>) and (H<sub>2</sub>En)[Bi<sub>2</sub>(cit)<sub>2</sub>](H<sub>2</sub>O) <sub><i>x</i></sub>  ...[more]

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