Synthesis and characterization of bis(amine)palladium(<scp>ii</scp>) carboxylate complexes as precursors of palladium nanoparticles
作者:Joanna Zakrzewska、Pawel Uznanski
DOI:10.1039/d1dt00638j
日期:——
exchange reaction from palladium acetate and the appropriate aliphatic carboxylic acid. It is proposed that carboxyl moieties in the presence of amine ligands are bound to palladium ions via monodentate bonding as opposed to bridging bidentate coordination of pure palladium carboxylate which exists in the form of polymer aggregates. All the studied palladium carboxylate/aminecomplexes form bilayer lamellar
正烷基胺与正烷基羧酸钯[Pd(R 2 NH 2)2(R 1 COO)2 ]的加合物的合成与表征(R 1 = 1、7和11; R 2 = 8 (分别为12、16和16)作为合成钯纳米颗粒(PdNPs)的前体是通过差示扫描量热法,FT-IR,拉曼光谱和UV-Vis光谱,NMR光谱(1 H,13 C脉冲场梯度自旋回波(PGSE)和13 C CP-MAS),以及粉末X射线衍射。钯ñ通过乙酸钯和适当的脂族羧酸通过配体交换反应获得羧酸烷基酯。提出在胺配体存在下,羧基部分通过单齿键合与钯离子结合,而不是桥接纯聚合物羧酸盐形式的纯羧酸钯的双齿配位。所有研究的羧酸钯/胺络合物均形成双层层状结构,并表现出一级熔融转变。这项研究提供的证据表明,二价金属羧酸盐的相行为主要受羧酸根头基团配位的类型控制。对于n-羧酸烷基酯,直链型聚集体代替乙酸钯的三聚体单元。在溶液中,在胺的存在下,钯盐聚集体崩解,并且Pd配合物被胺