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首页> 外文期刊>Chemistry: A European journal >Creation of ternary multicomponent crystals by exploitation of charge-transfer interactions
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Creation of ternary multicomponent crystals by exploitation of charge-transfer interactions

机译：利用电荷转移相互作用产生三元多组分晶体

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摘要

Four new ternary crystalline molecular complexes have been synthesised from a common 3,5-dinitrobenzoic acid (3,5-dnda) and 4,4′-bipyridine (bipy) pairing with a series of amino-substituted aromatic compounds (4-aminobenzoic acid (4-aba), 4-(N,N-dimethylamino)benzoic acid (4-dmaba), 4-aminosalicylic acid (4-asa) and sulfanilamide (saa)). The ternary crystals were created through the application of complementary charge transfer and hydrogen-bonding interactions. For these systems a dimer was created through a charge-transfer interaction between two of the components, while hydrogen bonding between the third molecule and this dimer completed the construction of the ternary co-crystal. All resulting structures display the same acid?pyridine interaction between 3,5-dnba and bipy. However, changing the third component causes the proton of this bond to shift from neutral OH?N to a salt form, O ~-?HN~+, as the nature of the group hydrogen bonding to the carboxylic acid was changed. This highlights the role of the crystal environment on the level of proton transfer and the utility of ternary systems for the study of this process.
机译：由常见的3,5-二硝基苯甲酸（3,5-dnda）和4,4'-联吡啶（bipy）与一系列氨基取代的芳族化合物（4-氨基苯甲酸）配对合成了四个新的三元结晶分子配合物（4-aba），4-（N，N-二甲基氨基）苯甲酸（4-dmaba），4-氨基水杨酸（4-asa）和亚磺酰胺（saa））。三元晶体是通过应用互补电荷转移和氢键相互作用而产生的。对于这些系统，通过两个组分之间的电荷转移相互作用产生了二聚体，而第三个分子与该二聚体之间的氢键完成了三元共晶体的构建。所有得到的结构在3,5-dnba和联吡啶之间显示相同的酸-吡啶相互作用。但是，改变第三组分会使该键的质子从中性的OH→N转变成盐的形式，O〜-→HN〜+，因为氢键合到羧酸上的基团的性质改变了。这突出了晶体环境在质子转移水平上的作用以及三元体系在研究该过程中的作用。

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