Supramolecular Complexation of N-Alkyl- and N,N′-Dialkylpiperazines with Cucurbit[6]uril in Aqueous Solution and in the Solid State

被引:12
|
作者
Rekharsky, Mikhail V. [3 ,4 ]
Yamamura, Hatsuo [5 ]
Mori, Tadashi [4 ]
Sato, Akihiro [6 ]
Shiro, Motoo [7 ]
Lindeman, Sergey V. [8 ]
Rathore, Rajendra [8 ]
Shiba, Kouhei [9 ]
Ko, Young Ho [1 ,2 ]
Selvapalam, Narayanan [1 ,2 ]
Kim, Kimoon [1 ,2 ]
Inoue, Yoshihisa [3 ,4 ]
机构
[1] Pohang Univ Sci & Technol, Natl Creat Res Initiat Ctr Smart Supramol, Pohang 790784, South Korea
[2] Pohang Univ Sci & Technol, Div Mol & Life Sci, Dept Chem, Pohang 790784, South Korea
[3] JST, ICORP, Entropy Control Project, Suita, Osaka, Japan
[4] Osaka Univ, Dept Appl Chem, Suita, Osaka, Japan
[5] Nagoya Inst Technol, Grad Sch Technol, Showa Ku, Nagoya, Aichi 4668555, Japan
[6] JASCO Int Co, Hachioji, Tokyo 1920046, Japan
[7] Rigaku Corp, Akishima, Tokyo 1968666, Japan
[8] Marquette Univ, Dept Chem, Milwaukee, WI 53201 USA
[9] Sysmex Co, Sci Instrumentat Div, Nishi Ku, Kobe, Hyogo 6512271, Japan
关键词
crystal design; cucurbiturils; host-guest systems; supramolecular chemistry; thermodynamics; CUCURBITURIL HOMOLOGS; ORGANIC-MOLECULES; HOST; BINDING; CYCLODEXTRIN; DERIVATIVES; INCLUSION; ION; ENCAPSULATION; STABILITY;
D O I
10.1002/chem.200800398
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Complex stoichiometry/composition and degree of oligomerization (oligomeric supramolecular complex formation) of cucurbit[6]uril (CB[6]) with N-alkyl- and N,N'-dialkylpiperazine were investigated in aqueous solutions by means of isothermal titration calorimetry (ITC), ESI-MS, NMR and light scattering measurements. It was found that the complex stability and the degree of oligomerization increase with elongating the alkyl chain attached to the piperazine core. X-ray crystallographic studies revealed a clear correlation between the structure of CB[6]-alkylpiperazine crystals obtained from aqueous solutions and the molecular weight/properties of host-guest oligomers existed in the solution as supramolecular "seeds" of crystal formation.
引用
收藏
页码:1957 / 1965
页数:9
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