Modification of Fe-tricarboxylate based metalâorganic gels yielded tert-butyl substituted or phosphine-functionalised gels in alcohols or DMF, which were prepared from 5-tert-butylisophthalic acid and 5-diphenylphosphanylisophthalic acid, respectively. Owing to their permeability, such phosphine-functionalised metalâorganic gels can act as a new type of functionalisable porous scaffold. The phosphorus-containing gel was subsequently functionalised with Pd(II) by immersion in a solution of Pd(COD)Cl2 (COD = 1,5-cyclooctadiene). The subsequently functionalised Pd(II)-immobilised gel and its xerogel/aerogel showed high activity in the catalysis of Suzuki CâC coupling comparable to unsupported complexes. The gel/xerogels could be reused under ambient atmosphere.
对以
三羧酸铁为基础的
金属有机凝胶进行改性,在
醇类或
DMF 中得到了叔丁基取代或
磷化功能化凝胶,它们分别由 5-叔丁基
间苯二甲酸和 5-
二苯基膦基间苯二甲酸制备而成。由于其渗透性,这种
磷功能化
金属有机凝胶可以作为一种新型的功能化多孔支架。随后,将含
磷凝胶浸入 Pd(COD)Cl2(COD =
1,5-环辛二烯)溶液中,使其具有 Pd(II) 功能。随后官能化的
钯(II)固定化凝胶及其异凝胶/气凝胶在催化铃木 CâC 偶联过程中表现出与无支撑配合物相当的高活性。凝胶/气凝胶可在环境气氛下重复使用。