当前位置: X-MOL 学术ACS Appl. Mater. Interfaces › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Diffusion Control in the in Situ Synthesis of Iconic Metal–Organic Frameworks within an Ionic Polymer Matrix
ACS Applied Materials & Interfaces ( IF 9.5 ) Pub Date : 2018-01-16 00:00:00 , DOI: 10.1021/acsami.7b17662
Jungho Lim 1 , Eun Ji Lee 1 , Jae Sun Choi 1 , Nak Cheon Jeong 1
Affiliation  

Ionic polymers that possess ion-exchangeable sites have been shown to be a greatly useful platform to fabricate mixed matrices (MMs) where metal–organic frameworks (MOFs) can be in situ synthesized, although the in situ synthesis of MOF has been rarely studied. In this study, alginate (ALG), an anionic green polymer that possesses metal-ion-exchangeable sites, is employed as a platform of MMs for the in situ synthesis of iconic MOFs, HKUST-1, and MOF-74(Zn). We demonstrate for the first time that the sequential order of supplying MOF ingredients (metal ion and deprotonated ligand) into the alginate matrix leads to substantially different results because of a difference in the diffusion of the MOF components. For the examples examined, whereas the infusion of BTC3– ligand into Cu2+-exchanged ALG engendered the eggshell-shaped HKUST-1 layers on the surface of MM spheres, the infusion of Cu2+ ions into BTC3–-included alginate engendered the high dispersivity and junction contact of HKUST-1 crystals in the alginate matrix. This fundamental property has been exploited to fabricate a flexible MOF-containing mixed matrix membrane by coincorporating poly(vinyl alcohol). Using two molecular dyes, namely, methylene blue and rhodamine 6G, further, we show that this in situ strategy is suitable for fabricating an MOF-MM that exhibits size-selective molecular uptake.

中文翻译:

离子聚合物基质中原位金属有机骨架的原位合成中的扩散控制

尽管很少研究MOF的原位合成,但已证明具有离子可交换位点的离子聚合物是制造混合基质(MM)的非常有用的平台,可在其中混合金属-有机骨架(MOF)。在这项研究中,藻酸盐(ALG)是一种具有金属离子可交换位点的阴离子绿色聚合物,被用作MM的平台,用于原位合成标志性MOF,HKUST-1和MOF-74(Zn)。我们首次证明,由于MOF组分扩散的差异,向藻酸盐基质中供应MOF成分(金属离子和去质子化的配体)的顺序会导致实质上不同的结果。对于所检查的示例,将BTC 3–配体注入Cu 2+交换的ALG产生了MM球表面上的蛋壳形HKUST-1层,向BTC 3–注入的藻酸盐中注入了Cu 2+离子使HKUST-1晶体在藻酸盐基质中具有高分散性和结接触。已经通过共掺入聚乙烯醇来开发该基本特性来制造柔性的含MOF的混合基质膜。此外,使用两种分子染料,即亚甲基蓝和若丹明6G,我们证明了这种原位策略适用于制造表现出大小选择性分子吸收的MOF-MM。
更新日期:2018-01-16
down
wechat
bug