Hydrogen bonding vs. halogen bonding: the solvent decides.
Hydrogen bonding vs. halogen bonding: the solvent decides.
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DOI：
10.1039/c7sc01801k
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发表时间：
2017-08-01
期刊：
影响因子：
8.4
通讯作者：
Brammer L
中科院分区：
文献类型：
--
作者：
Robertson CC;Wright JS;Carrington EJ;Perutz RN;Hunter CA;Brammer L
溶剂的选择用于指导竞争性自组装中氢键或卤键的形成。控制分子间相互作用是利用自然界中的自组装不可或缺的。在这里，我们表明，氢键和卤键，两个最高度研究的定向分子间相互作用之间的竞争的控制，可以施加通过选择溶剂（极性），以指导自组装的共晶体。竞争共晶的形成已经研究了三对氢键和卤键供体，可以竞争一个共同的受体基团。这些比赛已在七种不同的溶剂中进行了检查。产物的形成已被确定和相纯度已通过粉末X-射线衍射图分析检查。氢键键合的共晶的形成有利于极性较低的溶剂和卤素键合的共晶的形成有利于极性较高的溶剂。溶剂极性在晶体形成开关从氢键卤素键占主导地位取决于相互作用的相对强度，但不是单独的溶液相相互作用的函数。结果清楚地表明，溶剂效应的升值是至关重要的，以获得控制的分子间相互作用。
Choice of solvent is used to direct the formation of either hydrogen bonds or halogen bonds in competitive self-assembly. Control of intermolecular interactions is integral to harnessing self-assembly in nature. Here we demonstrate that control of the competition between hydrogen bonds and halogen bonds, the two most highly studied directional intermolecular interactions, can be exerted by choice of solvent (polarity) to direct the self-assembly of co-crystals. Competitive co-crystal formation has been investigated for three pairs of hydrogen bond and halogen bond donors, which can compete for a common acceptor group. These competitions have been examined in seven different solvents. Product formation has been determined and phase purity has been examined by analysis of powder X-ray diffraction patterns. Formation of hydrogen-bonded co-crystals is favoured from less polar solvents and halogen-bonded co-crystals from more polar solvents. The solvent polarity at which the crystal formation switches from hydrogen-bond to halogen-bond dominance depends on the relative strengths of the interactions, but is not a function of the solution-phase interactions alone. The results clearly establish that an appreciation of solvent effects is critical to obtain control of the intermolecular interactions.
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影响因子：
62.1
作者：
Cavallo G;Metrangolo P;Milani R;Pilati T;Priimagi A;Resnati G;Terraneo G
通讯作者：
Terraneo G
影响因子：
6.1
作者：
Krause L;Herbst-Irmer R;Sheldrick GM;Stalke D
通讯作者：
Stalke D
影响因子：
3.9
作者：
Aakeröy CB;Spartz CL;Dembowski S;Dwyre S;Desper J
通讯作者：
Desper J
影响因子：
0.5
作者：
Coelho, A. A.;Evans, John S. O.;Parsons, S.
通讯作者：
Parsons, S.
影响因子：
4.3
作者：
Aakeroey, Christer B.;Baldrighi, Michele;Resnati, Giuseppe
通讯作者：
Resnati, Giuseppe