Secondary amine-functionalised metal–organic frameworks: direct syntheses versus tandem post-synthetic modifications
作者:Luke L. Keenan、Harina Amer Hamzah、Mary F. Mahon、Mark R. Warren、Andrew D. Burrows
DOI:10.1039/c6ce01270a
日期:——
[Zn4O(bdc-NH2)3], IRMOF-3 (bdc-NH2 = 2-amino-1,4-benzenedicarboxylate), and [Cr3O(H2O)2F(bdc-NH2)3], MIL-101(Cr)-NH2, undergo tandem post-synthetic modification reactions with aldehydes and NaCNBH3 to form secondary amine-functionalised metal–organic frameworks (MOFs). The degree of conversion ranges from 17–74% for IRMOF-3 (2a–i) and from 35–51% for MIL-101(Cr)-NH2 (4a–d), and alkene, sulfide, ferrocenyl
[Zn 4 O(bdc-NH 2)3 ],IRMOF-3(bdc-NH 2 = 2-氨基-1,4-苯二甲酸)和[Cr 3 O(H 2 O)2 F(bdc-NH 2)3 ],MIL-101(Cr)-NH 2,与醛和NaCNBH 3进行串联后合成修饰反应,形成仲胺官能化的金属有机骨架(MOF)。对于IRMOF-3(2a–i),转化率范围为17–74%;对于MIL-101(Cr)-NH 2(4a–d),转化率范围为35–51%。),并且可以将烯烃,硫化物,二茂铁基和吡啶基取代基成功引入到MOF锌中。对于锌和铬的MOF,醛的空间体积增加会导致转化度降低。可以利用低体积醛的低转化率生成包含两个不同仲胺取代基的产物,例如[Zn 4 O(bdc-NH 2)1.93(bdc-NHCH 2 CH 2 CH 2 SMe)0.47(bdc-NHEt)0.59 ] 2k,其中顺序进行了串联修改。N 2吸附实验表明