Abstract In this paper we reported the microwave assisted and conventional syntheses of new mesoporous zinc-based luminescent coordination polymer (2: catena-poly[(aquazinc-μ-5-ylmethyleneamino-8-quinolinolate-O:N)-μ-(benzoate-O:O)]) derivative from new rigid Schiff base linker (1a: (E)-4-((quinolin-5-ylmethylene)amino)benzoic acid). The microwave-assisted synthesis allows getting aggregates of nanoparticles with high crystallinity in good yields, which demonstrated to be a better synthetic route than conventional synthesis in terms of processing facility, short reaction time, and reproducibility. Mesoporous zinc-based luminescent coordination polymer 2 and its free Schiff base linker 1a were fully characterized by Raman, IR-ATR, EDX-FESEM, XRD and XPS techniques. In addition, free Schiff base linker 1a was also characterized by NMR (1H and 13C). The photophysical properties were analyzed in MeOH by UV–Vis and fluorescence spectroscopy revealing that both materials can be classified as semiconductor with fluorescence quantum yield in the 0.13–0.50 range. X-ray diffraction pattern of mesoporous zinc-based luminescent coordination polymer 2 synthetized under microwave irradiation exhibited high crystallinity and thermal analysis indicated that the nanostructures show one molecule of occluded into the polymer layers. The bacterial toxicity and staining studies by epifluorescence microscopy were carried out with the newly synthetized molecules. To the best of our knowledge, this is the first report of new mesoporous zinc(II)−based luminescent coordination polymer with a rigid Schiff base linker as spacer group and applied as bacterial-staining fluorescent probe.

中文翻译：

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新型介孔锌（II）基发光配位聚合物的微波和常规合成、表征、光物理性质、毒性和细菌染色

摘要 在本文中，我们报道了新型介孔锌基发光配位聚合物（2:catena-poly[(aquazinc-μ-5-ylmethyleneamino-8-quinolinolate-O:N)-μ-(benzoate -O:O)]) 衍生自新的刚性席夫碱接头（1a: (E)-4-（（喹啉-5-基亚甲基）氨基）苯甲酸）。微波辅助合成允许以良好的产率获得具有高结晶度的纳米粒子的聚集体，这在加工设施、反应时间短和重现性方面证明是比传统合成更好的合成路线。通过拉曼、IR-ATR、EDX-FESEM、XRD 和 XPS 技术充分表征了介孔锌基发光配位聚合物 2 及其游离 Schiff 碱接头 1a。此外，游离希夫碱接头 1a 还通过 NMR（1H 和 13C）表征。在 MeOH 中通过 UV-Vis 和荧光光谱分析光物理性质，表明这两种材料都可以归类为半导体，荧光量子产率在 0.13-0.50 范围内。在微波辐射下合成的介孔锌基发光配位聚合物 2 的 X 射线衍射图显示出高结晶度，热分析表明纳米结构显示出一个分子被吸留在聚合物层中。用新合成的分子通过落射荧光显微镜进行细菌毒性和染色研究。据我们所知，这是首次报道了新型介孔锌（II）基发光配位聚合物，其具有刚性 Schiff 碱接头作为间隔基团并用作细菌染色荧光探针。