The efficient combination of various moieties is helpful to develop organic functional molecules. Herein, three of urea and Schiff-base bifunctional derivatives (OG, MG and PG) were prepared from o/m/p-diaminobenzene respectively. Benefitting from the urea and Schiff-base, these derivatives revealed satisfactory gelation capacity. However, the various locations of urea and imine paved them markedly different assembly performances during the gel formation. Additionally, these functional molecules displayed obvious “off-on” fluorescence sensing behaviors towards Zn²⁺ in solution ascribing to the imine and neighbor phenolic hydroxyl, among which the MG displayed the best Zn²⁺ selectivity. Crucially, the MG also realized Zn²⁺ probing at cellular level and its gel gave a visual detection via the gel-sol transition.

各种部分的有效结合有助于开发有机功能分子。在此，分别从o / m /对-二氨基苯制备三种脲和席夫碱双功能衍生物（OG，MG和PG）。得益于尿素和席夫碱，这些衍生物显示出令人满意的胶凝能力。然而，在凝胶形成过程中，尿素和亚胺的不同位置铺就了它们明显不同的组装性能。此外，这些功能分子对溶液中的Zn ²⁺表现出明显的“开-关”荧光感应行为，归因于亚胺和邻近的酚羟基，其中MG显示出最佳的Zn。²⁺选择性。至关重要的是，MG还实现了细胞水平的Zn ²⁺探测，并且其凝胶通过凝胶-溶胶转变提供了视觉检测。