Cu₂O nanoparticle-catalyzed tandem reactions for the synthesis of robust polybenzoxazole

Abstract

Cu2O nanoparticles show high catalytic activity in tandem reactions of PBO synthesis via green chemistry. The as-prepared PBO is much more robust than the commercial PBO against hydrolysis and can be used in various thermo-mechanical application.

Metal–Ligand Interactions and Their Roles in Controlling Nanoparticle Formation and Functions

“…(a) TEM image of the monodisperse Cu NPs (7 nm) showing a hexagonal packing pattern . (b) Sketch of the conversion of the TDPA-Cu coordination polymer lamellae into monodisperse Cu NPs.…”

“…This has been broadly demonstrated in solution phase synthesis of NPs, including the recent synthesis of monodisperse Cu NPs by reduction of the copper acetate (CuOAc) precursor in the presence of the tetradecylphosphonic acid (TDPA) ligand. 2,35 By controlling the relative metal-to-ligand molar ratio to 1:0.5, 1:0.75, and 1:1, respectively, monodisperse 7, 9, and 12 nm Cu NPs were made, as shown in Figure 3a. 2 16 nm Cu NPs were prepared by increasing the concentration of both CuOAc and TDPA from 0.1 mol/L to 0.2 mol/L while using the same 1:0.5 ratio as in the 7 nm Cu NP synthesis.…”

“…2,35 By controlling the relative metal-to-ligand molar ratio to 1:0.5, 1:0.75, and 1:1, respectively, monodisperse 7, 9, and 12 nm Cu NPs were made, as shown in Figure 3a. 2 16 nm Cu NPs were prepared by increasing the concentration of both CuOAc and TDPA from 0.1 mol/L to 0.2 mol/L while using the same 1:0.5 ratio as in the 7 nm Cu NP synthesis. The ligand effect can be observed directly through an in situ X-ray characterization study on the synthesis of Cu NPs.…”

“…Soc.202114321152122 The paper reported the synthesis of AuPd alloy nanoparticles with oleylamine as a protection ligand and the removal of oleylamine to catalyze tandem reactions in a green chemistry reaction condition. GuanH.ShenM.HarrisC.LinH.WeiK.MoralesM.BronowichN.SunS. Guan, H. Shen, M. Harris, C. Lin, H. Wei, K. Morales, M. Bronowich, N. Sun, S. 20221461626170 The phosphonic acid ligand was used to control the synthesis of monodisperse Cu nanoparticles, their oxidation to Cu 2 O nanoparticles, and enhanced catalysis for tandem reactions leading to green chemistry synthesis of polybenzoxazole. FuJ.ZhuW.ChenY.YinZ.LiY.LiuJ.ZhangH.ZhuJ.-J.SunS. Fu, J. Zhu, W. Chen, Y. Yin, Z. Li, Y. Liu, J. Zhang, H. Zhu, J.-J.…”

Structural Regulation of Poly(benzoxazole imide)s and Their Composites with Fluorinated Graphene to Construct High-Performance Low Dielectric Films

“…Generally, macroscopic PBO articles such as PBO films are prepared by pre-designing and fabricating soluble precursors followed by ring-closing conversion at elevated temperature. − There are two specific implementation paths depending on the type of precursors. The first path is to prepare polyhydroxyamide (PHA) precursors by polymerization of bisaminophenols and diacid chloride (Figure a). − The ring-closing reaction of PHAs is carried out at a relatively low temperature (<300 °C), which avoids thermo-oxidative degradation and thus ensures the flexibility of the resulting PBO films .…”