Complex interactions of pillar[5]arene with paraquats and bis(pyridinium) derivatives
文献类型：期刊论文
| 作者 | Li, Chunju1,2; Xu, Qianqian1; Li, Jian1; Yao, Feina1; Jia, Xueshun1,3 |
| 刊名 | ORGANIC & BIOMOLECULAR CHEMISTRY
 |
| 出版日期 | 2010 |
| 卷号 | 8期号:7页码:1568-1576 |
| ISSN号 | 1477-0520 |
| DOI | 10.1039/b920146g |
| 英文摘要 | The complexation behavior of a series of paraquats (G1 center dot 2PF(6)-G5 center dot 2PF(6)) and bis(pyridinium) derivatives (G6 center dot 2PF(6)-G14 center dot 2PF(6)) with pillar[5] arene (P5A) host has been comprehensively investigated by (1)H NMR, ESI mass and UV-vis absorption spectroscopy. It is found that P5A forms 2 : 1 external complexes with N,N'-dialkyl-4,4'-bipyridiniums (G1-G4 center dot 2PF(6)); while it forms 1 : 1 pseudorotaxane-type inclusion complexes with methylene [-(CH(2))(n)-] linked bis(pyridinium) derivatives possessing appropriate chain lengths (n = 3-6, G7-G10 center dot 2PF(6)). Host-guest association constants in dimethyl sulfoxide (DMSO) were determined, indicating G7-G10 center dot 2PF(6) axles form stable [2]pseudorotaxanes with P5A wheel in this very high polarity solvent and 1,4-bis(pyridinium) butane (G8 center dot 2PF(6)) was the most suitable axle unit. Meanwhile, the nature of the substituents attached to 1,4-bis(pyridinium) butane dramatically affects the molecular recognition behavior. The introduction of pyridyls (G13 center dot 2PF(6)) increases not only the K(a) value (4.5 x 10(2) -> 7.4 x 10(2) M(-1)), but also the charge transfer (CT) absorption (colorless -> yellow). Furthermore, the solvent effects have also been investigated, showing they significantly influence the association strength during the course of host-guest complexation. Particularly, the K(a) value of P5A-G13 center dot 2PF(6) in 1 : 1 (v: v) acetone-d(6)/DMSO-d(6) is enhanced by a factor of 7.3 compared with pure DMSO-d(6) (7.4 x 10(2) -> 5.4 x 10(3) M(-1)). |
| 语种 | 英语 |
| WOS记录号 | WOS:000275947900011 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/70709]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Li, Chunju |
| 作者单位 | 1.Shanghai Univ, Dept Chem, Shanghai 200444, Peoples R China 2.Chinese Acad Sci, Inst Chem, CAS Key Lab Mol Recognit & Funct, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Organ Chem, Key Lab Synthet Chem Nat Subst, Shanghai 200032, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Chunju,Xu, Qianqian,Li, Jian,et al. Complex interactions of pillar[5]arene with paraquats and bis(pyridinium) derivatives[J]. ORGANIC & BIOMOLECULAR CHEMISTRY,2010,8(7):1568-1576. |
| APA | Li, Chunju,Xu, Qianqian,Li, Jian,Yao, Feina,&Jia, Xueshun.(2010).Complex interactions of pillar[5]arene with paraquats and bis(pyridinium) derivatives.ORGANIC & BIOMOLECULAR CHEMISTRY,8(7),1568-1576. |
| MLA | Li, Chunju,et al."Complex interactions of pillar[5]arene with paraquats and bis(pyridinium) derivatives".ORGANIC & BIOMOLECULAR CHEMISTRY 8.7(2010):1568-1576. |
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来源：化学研究所
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