Interconnected ruthenium dioxide nanoparticles anchored on graphite oxide: Highly efficient candidate for solvent-free oxidative synthesis of imines

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 46; pp. 279 - 288
• Main Authors: Yuan, Guohao, Gopiraman, Mayakrishnan, Cha, Hyung Joon, Soo, Hwang Dong, Chung, Ill-Min, Kim, Ick Soo
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.02.2017; 한국공업화학회
• Subjects: Coupling reactions; Graphite oxide; Imines; Nanocatalyst; Ruthenium dioxide; 화학공학; Nanocatalyst; Ruthenium dioxide; Graphite oxide; Coupling reactions; Imines
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2016.10.040

[Display omitted] •Interconnected ruthenium nanoparticles/graphite oxide nanocatalyst (RuO2/GO) was successfully prepared.•Physicochemical properties of RuO2/GO were investigated in detail.•RuO2/GO showed an excellent catalytic activity toward imine synthesis.•Reusability and heterogeneity of RuO2/GO were found to be excellent.•Mechanism has been proposed for catalytic systems. Interconnected ruthenium dioxide nanoparticles (RuO2NPs) anchored graphite oxide nanocatalyst (RuO2/GO) with good BET surface-area (285m2/g) was prepared. Under feasible reaction conditions, the RuO2/GO worked well for oxidative synthesis of imines. The RuO2/GO catalyzed a broad range of amines including less reactive aliphatic amines in good yields (98–58%) with excellent selectivity (100%). This is the most efficient RuO2-based nanocatalyst for the synthesis of imines among those reported to date. An indirect two-step method was adopted for the coupling of alcohols and amines, and the results found to be excellent. The reusability, stability and heterogeneity of RuO2/GO were also investigated.