Synthesis Of Water-oxidized Ruthenium Complexes And A Novel Catalytic System For Hydrogen Release From Ammonia Borane

In this article,four novel organic compounds were synthesized and the same kinds of Ni₂P nanoparticles in two different sizes were prepared and were characterized.Three of the four novel organic compounds are mononuclear ruthenium complexes.Those three compounds[Ru（bpy）（dmso）₂（pyp）₂]（C1）,[Ru（bpy）（pic）₂（pyp）₂]（C2）and[Ru（pmap）₂]（C3）[bpy=2,2’-bipyridine,dmso=dimethyl sulfoxide,pic=4-picoline,pyp=2-（1,10-phenanthrolin-2-yl）phenol,pmap=2-（（（1H-pyrrol-2-yl）methylene）amino）phenol)]are fully characterized by ¹H NMR,¹³C NMR spectroscopy and MS.The crystal structures of complexes C1 and C3 have been resolved.A new bilateral symmetry ligand（L1）which integrating nalidixic,imidazole and carboxyl.We employed those three ruthenium complexes as catalyzes in a system for water oxidation when using（Ce（NH₄）₂（NO₃）₆）as the oxidant under acidic conditions.To our surprise,None of the three complexes could promote water oxidation chemically,after analyzed their structure-activity relationship,we found something details which were required for the structure of amononuclear ruthenium complexes that could enabled them promote water oxidation chemically.So this work will offer valuable reference for catalysts designers.In this article,the same kinds of Ni₂P nanoparticles in two different sizes were prepared and were fully characterized by XRD,SEM,TEM,HR-TEM,EDX and SAED.The Ni₂P nanoparticles were employed as a novel catalyst for the hydrolytic dehydrogenation of amine-borane aqueous solution and we demonstrated the catalytic activities of the Ni₂P NPs via measuring the rate and extent of hydrogen generation in the hydrolysis of amine-borane by varying catalyst concentration,temperature and AB concentration.Through those measurement,we got the TOF,reaction orders and the activation energy for this system.In order to ensure that the catalyst undergoes no deterioration in the course of experiment and rinse,XRD were employed in detecting the remainder after each use and the XRD results prove that our recycling catalyst shows the good stability and recyclability.The surface morphology of the reclaimed catalyst was examined by TEM.Because this is the first time the Ni₂P nanoparticles were used as an resultful catalysts for H₂ liberate from amine-borane,which will bring a new perspective in hydrogen reservoir field.