Pulsed gradient spin echo (PGSE) diffusion measurements as a tool for the elucidation of a new type of hydrogen-bonded bicapsular aggregate

Alajarin M; Pastor A; Orenes RA; Martinez-Viviente E; Pregosin PS

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Pulsed gradient spin echo (PGSE) diffusion measurements as a tool for the elucidation of a new type of hydrogen-bonded bicapsular aggregate

机译：脉冲梯度自旋回波（PGSE）扩散测量作为阐明新型氢键双囊聚集体的工具

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Compounds formed by linking two tris(ureidobenzyl)amine modules with a hexamethylene tether are described. These compounds self-assemble to form bicapsular aggregates featuring two rings of six hydrogen-bonded ureas. H-1 and H-1/H-1 ROESY NMR spectroscopy, together with pulsed gradient spin echo (PGSE) NMR diffusion measurements, have been used to characterize the dimers in solution. The results have been compared with energy-minimized structures. The new compounds are kinetically stable on the NMR timescale, and their thermodynamic stabilities are comparable to other capsular aggregates derived from tris(ureidobenzyl)amines.

机译：描述了通过将两个三（脲基苄基）胺模块与六亚甲基系链连接而形成的化合物。这些化合物自组装形成双胶囊聚集体，其特征是具有两个由六个氢键合的脲组成的环。 H-1和H-1 / H-1 ROESY NMR光谱，以及脉冲梯度自旋回波（PGSE）NMR扩散测量已用于表征溶液中的二聚体。将结果与能量最小化的结构进行了比较。新化合物在NMR时标上具有动力学稳定性，其热力学稳定性与衍生自三（脲基苄基）胺的其他荚膜聚集体相当。

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《Chemistry: A European journal》 |2006年第3期|共10页
作者
Alajarin M; Pastor A; Orenes RA; Martinez-Viviente E; Pregosin PS;
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正文语种 eng
中图分类化学;
关键词
diffusion; hydrogen bonds; NMR spectroscopy; self-assembly; structure elucidation; SELF-ASSEMBLING CAPSULES; MOLECULAR RECOGNITION; SUPRAMOLECULAR POLYMERS; RESORCINARENE CAPSULE; UNIMOLECULAR CAPSULE; CYCLODEXTRIN DIMERS; NMR DIFFUSION; GUEST; ENCAPSULATION; TETRAUREA;

机译：扩散;氢键;核磁共振波谱;自组装;结构解析;自组装胶囊;分子识别;超分子聚合物;间苯二酚胶囊;单分子胶囊;环糊精尺寸;核磁共振扩散;客人;胶囊;

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1. Pulsed gradient spin echo (PGSE) diffusion measurements as a tool for the elucidation of a new type of hydrogen-bonded bicapsular aggregate [J] . Alajarin M, Pastor A, Orenes RA, Chemistry: A European journal . 2006,第3期

机译：脉冲梯度自旋回波（PGSE）扩散测量作为阐明新型氢键双囊聚集体的工具
2. Self-diffusion coefficients of transition-metal complex ions, ion pairs, and higher aggregates by pulsed field gradient spin-echo NMR measurements [J] . Zuccaccia C., Cardaci G., Macchioni A., Organometallics . 2000,第23期

机译：通过脉冲场梯度自旋回波NMR测量，过渡金属络合物离子，离子对和更高聚集体的自扩散系数
3. Enantiomer discrimination using lipophilic cyclodextrins studied by electrode response, pulsed-gradient spin-echo (PGSE) NMR and relaxation rate measurements [J] . Gafni A., Kataky R., Palmer S., Journal of the Chemical Society. Perkin Transactions 2 . 1998,第1期

机译：使用亲脂性环糊精通过电极响应，脉冲梯度自旋回波（PGSE）NMR和弛豫率测量研究对映体鉴别
4. Self-Diffusion Coefficients of Associating Polymers from Pulsed-Gradient Spin-Echo Nuclear Magnetic Resonance Spectroscopy [C] . Peter M. Macdonald, Yoshimitsu Uemura, Lara Dyke, American Chemical Society . 1996

机译：脉冲梯度旋转回波核磁共振谱相关聚合物的自扩散系数
5. Use of self-diffusion spin-echo magnetic resonance for non-destructive measurement of soluble solids content of fruits. [D] . Wai, Wing-Kin. 1993

机译：自扩散自旋回波磁共振技术用于水果可溶性固形物含量的无损检测。
6. Pore-to-pore hopping model for the interpretation of the pulsed gradient spin echo attenuation of water diffusion in cell suspension systems. [O] . P C Jiang, T Y Yu, W C Perng, 2001

机译：孔至孔跳变模型用于解释细胞悬浮系统中水扩散的脉冲梯度自旋回波衰减。
7. A pulsed field gradient spin echo NMR spectrometer for diffusion coefficient measurements [O] . Colluroy Bhaskar, Mangamma G, Bhat SV 1988

机译：用于扩散系数测量的脉冲场梯度自旋回波NMR光谱仪

Pulsed gradient spin echo (PGSE) diffusion measurements as a tool for the elucidation of a new type of hydrogen-bonded bicapsular aggregate

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