Lanthanum microporous frameworks (Hdma)_2n[La₂(1,3-pdta)₂(H₂O)₂]_n·5nH₂O (1, dma = dimethylamine, 1,3-pdta = 1,3-propanediaminetetraacetic acid) and (H₂pn)_n[La₂(1,3-pdta)₂(H₂O)₂]_n·5nH₂O (2, pn = 1,3-propanediamine) with double channels have been template-synthesized by protonated dimethylamines and 1,3-propanediamines, respectively. While bulky product (H₂bn)[La₂(1,3-pdta)₂(H₂O)₄]·10H₂O (3, bn = 1,4-butanediamine) is isolated as a dinuclear species with tetrahydrates, whose main anion can be served as a precursor for 1 and 2. Materials 1–3 are able to maintain their chemical and thermal stabilities to 200 °C based on TG and XRD analyses. Gas adsorptions demonstrate that MOFs 1 and 2 are amicable for O₂ and CO₂, while no adsorption has been observed for CH₄, N₂ or H₂ respectively. The amounts of encapsulated CO₂ in hydrophobic pores are dependent on the alkalinities of the diamines in the next confined hydrophilic holes, showing synergistic effects between double channels. For protonated dimethylamines and 1,3-propanediamines in 1 and 2, obvious downfield shifts have been found by solid-state ¹³C NMR spectroscopies, along with clear red shifts in FT-IR spectra compared with free species. Moreover, captured CO₂ inside 1 can be quantized by NMR measurements and IR spectroscopies under ambient condition. These all reflect the confinement effects of nano-environments.

镧微孔骨架 (Hdma) _2n [La ₂ (1,3-pdta) ₂ (H ₂ O) ₂ ] _n ·5nH ₂ O ( 1 , dma = 二甲胺, 1,3-pdta = 1,3-丙二胺四乙酸)和 (H ₂ pn) _n [La ₂ (1,3-pdta) ₂ (H ₂ O) ₂ ] _n ·5nH ₂ O ( 2 , pn = 1,3-丙二胺) 模板合成了双通道质子化二甲胺和 1,3-丙二胺，分别。虽然体积庞大的产品（H _{2 0}亿）[La ₂(1,3-pdta) ₂ (H ₂ O) ₄ ]·10H ₂ O ( 3 , bn = 1,4-丁二胺) 被分离为具有四水合物的双核物质，其主要阴离子可作为1和2。根据 TG 和 XRD 分析，材料1 – 3能够将其化学和热稳定性保持在 200 °C。气体吸附表明 MOF 1和2对 O ₂和 CO ₂是友好的，而没有观察到对 CH ₄、N ₂或 H _2的吸附分别。疏水孔中包封的CO ₂的量取决于下一个封闭的亲水孔中二胺的碱度，显示出双通道之间的协同效应。对于1和2中的质子化二甲胺和 1,3-丙二胺，固态¹³ C NMR 光谱发现明显的低场位移，以及与游离物质相比在 FT-IR 光谱中明显的红移。此外， 1内捕获的 CO ₂可以在环境条件下通过 NMR 测量和 IR 光谱进行量化。这些都反映了纳米环境的限制效应。