Polymeric architectures of bismuth citrate based on dimeric building blocks

• Published in: Science China. Chemistry Vol. 53; no. 10; pp. 2152 - 2158
• Main Authors: Yang, Nan, An, Yan, Cai, JiWen, Hu, LiHong, Zeng, YiBo, Mao, ZongWan, Chen, GuanHua, Sun, HongZhe
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science China Press 01.10.2010; Springer Nature B.V
• Subjects: Aqueous solutions; Bismuth; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Cross polarization; Crystallization; Crystallography; Dimers; Ethylenediamine; Mass spectrometry; NMR; Nuclear magnetic resonance; Pyridines; Structural models; crystal structure; polymeric architecture; ESI-MS; solid-state NMR; bismuth citrate
• ISSN: 1674-7291; 1869-1870; 1862-2771
• DOI: 10.1007/s11426-010-4113-x

Four bismuth complexes, (H 2 En)[Bi 2 (cit) 2 (H 2 O) 4/3 ]·(H 2 O) x ( 1 ), (H 2 En) 3 [Bi 2 (cit) 2 Cl 4 ]·(H 2 O) x ( 2 ), (HPy) 2 [Bi 2 (cit) 2 (H 2 O) 8/5 ]·(H 2 O) x ( 3 ) and (H 2 En)[Bi 2 (cit) 2 ](H 2 O) x ( 4 ) [cit = citrate 4− ; 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) 13 C 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).