A novel amorphous iron metal-organic framework (NEU-2 = Fe(BPDI)(Py)₂, BPDI = N,N'bis(glycinyl)pyromellitic diimide; Py = pyridine) with multichannel pore systems is synthesized, and subsequently tested as class 1 sorbent by evaluating its CO₂ capture capacity. Whereas the meso- and macro-pores present in NEU-2 are loaded with polietilenimina (PEI), micropores are maintained accessible for CO₂ diffusion. Tests at different temperatures and cyclic adsorption-desorption experiments are performed to examine CO₂ uptake and amine efficiency evolution. Moreover, the diffusion resistance present within the pores of the material is measured by comparing the fast uptake at the beginning of the capture (pseudo-kinetic regime) to the slow uptake at the end of capture towards equilibrium (pseudo-diffusive regime). It is also reported a comparative study of the CO₂ capture capacity of amorphous NEU-2 and crystalline NEU-1c. This research demonstrates that the ordered crystalline state of MOFs is not a requirement for gas uptake, establishing novel amorphous MOFs with hierarchical porosity as promising materials for CO₂‐capture applications. It is evidenced that amorphous MOFs may facilitate a variety of chemical separations due to its framework flexibility and, ultimately, its guest-responsive capability.

合成了具有多通道孔系统的新型无定形铁金属有机骨架（NEU-2 = Fe（BPDI）（Py）₂，BPDI = N，N'双（甘氨酰基）均苯二甲酰亚胺； Py =吡啶），随后进行了测试通过评估其CO ₂捕集能力来获得1类吸附剂。尽管NEU-2中存在的中孔和大孔中充满了小孔菌（PEI），但微孔仍可用于CO ₂扩散。进行了不同温度下的测试以及循环吸附-解吸实验以检查CO ₂吸收和胺效率的演变。此外，通过将捕获开始时的快速吸收（伪动力学机制）与捕获时趋于平衡的缓慢吸收（伪扩散机制）进行比较，可以测量材料孔隙中存在的扩散阻力。还报道了对非晶NEU-2和结晶NEU-1c的CO ₂捕集能力的比较研究。这项研究表明，MOF的有序晶态不是气体吸收的必要条件，建立了具有分层孔隙率的新型无定形MOF作为CO _2的有前途的材料捕获应用程序。有证据表明，无定形的MOF由于其框架的灵活性以及最终的客体响应能力而可以促进多种化学分离。