Zhang, Gongguo, et al. Frontiers in Chemistry 9 (2021): 671220.
N-Oleyl-1,3-propanediamine (OPDA) was employed as a critical capping and structure-directing agent in the aqueous-phase synthesis of Au@CuxO core-shell mesoporous nanospheres (MPNSs) via a seeded growth strategy. The process utilized a halide-free copper precursor, enabling controlled formation of the copperish oxide shell.
In a typical synthesis, 50 mg of copper(II) acetylacetonate [Cu(acac)₂], 200 μL of OPDA, and 200 μL of a 10-nm Au seed solution were mixed with 10 mL of deionized water in a 20 mL glass vial. Subsequently, 2 mL of an ascorbic acid solution (100 mM) was introduced to initiate reduction, and the mixture was heated at 100 °C in an oil bath for 30 minutes. Upon completion, the reaction was quenched in an ice-water bath. The resulting nanospheres were harvested via centrifugation (16,000 rpm, 10 min) and washed with water before characterization.
OPDA played a pivotal role in directing the mesoporous structure of the CuxO shell and stabilizing mixed-valence copper species. The synthesized Au@CuxO MPNSs demonstrated superior photocatalytic activity in the degradation of methyl orange under visible light, highlighting OPDA's value in advanced nanomaterial fabrication for environmental applications.
Zhang, Gongguo, et al. Catalysis Today 409 (2023): 63-70.
N-Oleyl-1,3-propanediamine (OPDA) was employed as a critical reaction medium in the synthesis of PdSm bimetallic nanocrystals (NCs) through a high-temperature thermal co-reduction method. In a typical procedure, 10 mg of palladium(II) acetylacetonate [Pd(acac)₂], 10 mg of samarium(III) acetylacetonate [Sm(acac)₃], and 30 mg of molybdenum hexacarbonyl [Mo(CO)₆] were added to 5 mL of OPDA.
The resulting mixture was magnetically stirred and heated at 150 °C for 3 hours under ambient pressure. During this process, OPDA acted as both solvent and coordinating agent, facilitating the controlled reduction and growth of ultrathin PdSm nanostructures. Upon completion, the black colloidal product was collected via centrifugation at 16,000 rpm for 10 minutes and subsequently washed with toluene to remove residual organics.
The use of OPDA was critical to achieving uniform, sub-3 nm nanostructures with defined morphologies, such as porous nanosheets and concave tetrahedra. This synthetic route demonstrates the effectiveness of OPDA in enabling shape-controlled synthesis of rare-earth metal-doped nanocrystals for electrocatalytic applications.
Jiang, Bo, et al. Colloids and Surfaces A: Physicochemical and Engineering Aspects 624 (2021): 126824.
N-Oleyl-1,3-propanediamine (NOPDA), an unsaturated fatty diamine, has demonstrated exceptional performance as a key component in film forming amine (FFA) formulations for corrosion inhibition in acidic environments. In a recent study, NOPDA was incorporated with diethyl-aminoethanol (DEAE), hydrotrope (HT), and surfactant (ST) to prepare an optimized corrosion inhibitor targeting carbon steel surfaces in 1.0 M HCl.
The FFA formulation was prepared by sequentially combining components in a three-necked flask, followed by stirring at 80 °C for 1 hour. DEAE significantly improved the emulsification and solubility of NOPDA, enhancing its adsorption onto metal surfaces. SEM and AFM imaging revealed a uniform protective film formation, while weight loss experiments indicated a high corrosion inhibition efficiency of 92.1%. Adsorption behavior followed the Langmuir isotherm model and was endothermic in nature.
Electrochemical impedance spectroscopy confirmed the formation of a hydrophobic barrier layer that impedes charge transfer. Contact angle measurements and X-ray photoelectron spectroscopy (XPS) further verified the film's integrity, with adsorption mechanisms involving chemisorption, electrostatic interaction, and hydrogen bonding.
This study underscores the efficacy of NOPDA-based FFA systems in acidic corrosion control and highlights its potential in industrial applications requiring environmentally friendly and high-performance corrosion inhibitors.