Influence of aliphatic amide terminals on the thermoresponsive properties of hyperbranched polyethylenimines

Multi stimuli-responsive photoluminescent nanocomposite of silver nanoclusters with hyperbranched polyethylenimine derivatives

“…First, PEI terminated with a certain number of TMA groups was prepared according to our previous work. 29 Subsequently, PEI-TMA was mixed with silver ions to form the nano complex. Finally, silver ions were reduced by ascorbic acid to form the AgNCs stabilized by PEI-TMA.…”

“…The preparation of PEI terminated with a certain number of trimethylacetamide (TMA) groups (PEI-TMA) is similar to that reported previously through the amidation reaction between PEI and trimethylacetic anhydride (see ESI †). 29 Ascorbic acid (A. R.) and AgNO 3 (A. R.) were purchased from Tianjin University Kewei Chemical Company and used directly. Aspirin (99%) was purchased from Tianjin Guangfu Fine Chemical Research Institute.…”

Improved epoxy thermosets by the use of poly(ethyleneimine) derivatives

“…The preparation and characterization of PEI derivatives by the amidation process have been followed by several authors [158]- [161]. For example, amidation with fatty acids leads to pigment dispersants for nonpolar solvents [162] due to the decrease in the polar character by the reduction of the amine content.…”

An unusual red-to-brown colorimetric sensing method for ultrasensitive silver(i) ion detection based on a non-aggregation of hyperbranched polyethylenimine derivative stabilized gold nanoparticles

“…HPEI-TMAm was prepared by reacting amino groups of HPEI with trimethylacetic anhydride. 21,22 Under a nitrogen atmosphere, 4.9 g (26.2 mmol) of trimethylacetic anhydride was added to the mixture of HPEI (4.5 g, 76.4 mmol of terminal groups) and triethylamine (2.9 g, 28.8 mmol) in 40 mL of chloroform. The reaction mixture was stirred at room temperature for 48 h, and then the mixture was reacted for 2 h at 65 °C to finalize the reaction.…”