Supramolecular assembly in cinnamate structures: The influence of the ammonium ion and halogen interactions

Supramolecular assembly in cinnamate structures: The influence of the ammonium ion and halogen interactions
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肉桂酸酯结构中的超分子组装：铵离子和卤素相互作用的影响

DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
B. Kariuki
B. Kariuki
中科院分区：
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文献类型：
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作者：
M. Chowdhury;B. Kariuki

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研究了铵离子在自组装过程中的作用，并讨论了铵离子对自组装结构的影响。 改变卤素取代基已被检查。3-氯肉桂酸铵和3-溴肉桂酸铵，以及 合成了3-氯肉桂酸酯/3-氯肉桂酸和3-溴肉桂酸铵/3-溴肉桂酸， 结构特点。该结构是分层的亲水性区域和双层阴离子。铵离子 以头对头的关系束缚相邻的阴离子。4A的距离，光反应的理想距离。改变氢气 从2：1到5：4的键给体与受体的比例不改变结构的一般特性。更换Meta 环取代基导致不同的结构。除了3-氯肉桂酸铵/肉桂酸，其中双键 不平行，阴离子/酸单元在所有其他结构中采用光二聚化的理想几何形状（距离和取向）。
The role of the ammonium ion in directing self-assembly has been investigated, and the effect on the structure of changing halogen substituents has been examined. Ammonium 3-chloro- and 3-bromocinnamates, as well as ammonium 3-chlorocinnamate/3-chlorocinnamic acid and ammonium 3-bromocinnamate/3-bromocinnamic acid, have been synthesized and structurally characterized. The structures are layered with hydrophilic regions and double layers of anions. The ammonium ion tethers neighboring anions in a head-to-head relationship ca. 4 A apart, the ideal distance for photoreaction. Changing the hydrogen bond donor-to-acceptor ratio from 2:1 to 5:4 does not change the general characteristics of the structures. Replacement of the meta ring substituent results in different structures. Apart from ammonium 3-chlorocinnamate/cinnamic acid, in which the double bonds are not parallel, the anion/acid units adopt the ideal geometry (distance and orientation) for photodimerization in all the other structures.