Low-molecular-weight compounds containing alkylurea fragments attached to the amino end of different miminalistic pseudopeptidic structures have been shown to be excellent organogelators in a variety of organic solvents and liquid organic compounds of different nature. The formation of gels in this work is defined through rheological measurements for those cases where G′ > G′′. Both the topology and the symmetry of the corresponding urea compounds play a role in defining their organogelator behavior. This can also be tuned by the presence of additional supramolecular guests, as is the case for suberic acid. These compounds also achieve the gelation of relevant active substances such as terpene natural oils and complex mixtures of flavors and fragrances. This provides a simple and mass-efficient supramolecular system for the quantitative encapsulation of active substances, without the need for any additional solvent or complex processes, and their consequent controlled release.

中文翻译：

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基于尿素的低分子量伪肽有机胶凝剂，用于（R）-柠檬烯的包封和缓释。

在各种有机溶剂和不同性质的液体有机化合物中，含有连接在不同的微量拟肽结构的氨基末端的烷基脲片段的低分子量化合物已被证明是出色的有机胶凝剂。对于G '> G的情况，通过流变测量确定了这项工作中凝胶的形成''。相应脲化合物的拓扑结构和对称性都在定义其有机胶凝剂行为中起作用。这也可以通过存在额外的超分子客体来调节，如辛二酸。这些化合物还可以实现相关活性物质的凝胶化，例如萜烯天然油以及调味剂和香料的复杂混合物。这提供了一种简单且质量高效的超分子系统，用于定量包封活性物质，而无需任何其他溶剂或复杂的过程以及其随后的受控释放。