Herein we report the bottom up design of novel porous metal-organic gels (MOGs) Fe-ndc (H₂ndc – 2,6-naphthalene dicarboxylic acid) and Fe-btc (H₄btc - 1,2,4,5-benzenetetracarboxylic acid) based on Fe³⁺. The effective strategy to obtain MOGs with controllable porosity by changing the concentrations of precursors was studied. The MOGs were dried in vacuum and the resultant xerogels were fully characterized using PXRD, TGA, FT-IR spectroscopy and SEM techniques. The resultant materials demonstrated a wide range of BET surface area 0–290 m²/g. Presence of micro (<2 nm), meso (2–50 nm) and macropores (>50 nm) in obtained xerogels was found. Furthermore, Fe-ndc demonstrated strong dependence of photoluminescence properties on the nature of the guest molecules. A unique enhancement effect of maximum luminescence intensity of the host framework Fe-ndc in the presence of toluene (862%). Introduction of benzene led to just 42% increase of luminescence intensity of material compared to Fe-ndc. Quenching effects of maximum luminescence intensity of the host framework upon introduction of nitrobenzene (67%) and 1,3-dinitrobenzene (46%) were found. These features make Fe-ndc an efficient fluorescent material for selective detection of hazardous highly energetic aromatic compounds.

在这里，我们报告了新型多孔金属有机凝胶（MOG）Fe-ndc（H ₂ ndc – 2,6-萘二甲酸）和Fe-btc（H ₄ btc-1,2,4,5-的自下而上的设计Fe ^3+为基础的苯四甲酸）。研究了通过改变前驱物的浓度来获得孔隙度可控的MOG的有效策略。真空干燥MOG，并使用PXRD，TGA，FT-IR光谱和SEM技术对所得干凝胶进行充分表征。所得材料显示出广泛的BET表面积0-290 m ²/G。在获得的干凝胶中发现了微米（<2 nm），内消旋（2-50 nm）和大孔（> 50 nm）的存在。此外，Fe-ndc证明了光致发光特性强烈依赖于客体分子的性质。在甲苯（862％）存在下，主体骨架Fe-ndc的最大发光强度的独特增强作用。与Fe-ndc相比，苯的引入导致材料的发光强度仅增加42％。发现在引入硝基苯（67％）和1,3-二硝基苯（46％）时，主体框架的最大发光强度的猝灭作用。这些特性使Fe-ndc成为一种高效荧光材料，可选择性检测危险的高能芳族化合物。