钯纳米粒子(Pd-NPs)在绿色条件下于水中通过NaOH还原PdCl 2并在Fe 3 O 4-木质素的支持下合成。Fe 3 O 4木质素是一种有机-无机杂化核壳,是通过超声处理Fe 3 O 4 NPs(20 nm)和碱性木质素的混合物而合成的。新材料Fe 3 O 4-木质素和Fe 3 O 4-木质素@ Pd-NPs通过PXRD,SEM和FT-IR光谱进行了表征。所述的Fe 3 ö 4 -Lignin @钯纳米颗粒是由紫外-可见光谱,TEM,EDX,HRICP-AES和TGA / DTA进一步证实。通过PXRD测定的Pd-NP的平均大小为5-10 nm。通过EDX分析得到的负载在Fe 3 O 4-木质素上的钯量为26.63质量%。从HRICP-AES获得的催化剂中的铁和钯的含量分别为每克木质素11.88(wt。%)和10.90(wt。%)。Fe 3 O 4-木质素@ Pd-NPs的催化势在Mizoroki-Heck
Ligand- and copper-free Sonogashira and Heck couplings of (Het)aryl chlorides and bromides catalyzed by palladium nanoparticles supported on in situ generated Al(OH)<sub>3</sub>
ligand- and copper-free Sonogashirareaction of (Het)aryl halides (Br and Cl) with various terminal alkynes and the Heck coupling of (Het)aryl halides (Br and Cl) with a series of olefins, catalyzed by palladiumnanoparticles supported on newly generated Al(OH)3, were developed. The catalyst can be readily recovered and reused 6 times without significant loss of activity and palladium leaching.