Topological Effects of Dendronized Polymers on Their Thermoresponsiveness and Microconfinement was written by Xu, Gang;Zhang, Jiaxing;Jia, Ruitong;Li, Wen;Zhang, Afang. And the article was included in Macromolecules (Washington, DC, United States) in 2022.SDS of cas: 112-49-2 This article mentions the following:
Topol. structures can provide dendritic polymers with featured properties through cooperative effects beyond their mol. structures. Herein, we report the synthesis of a series of oligoethylene glycol (OEG)-based dendronized polymers, which carry the first generation of 2-fold, 4-fold, or 6-fold dendritic OEG pendants with methoxyl or ethoxyl terminals. Depending on the OEG branching d., these polymers show different mol. thicknesses and exhibit characteristic thermoresponsiveness with phase transition temperatures in the range of 16.6-67.2鎺矯. Furthermore, the higher the OEG branching d., the higher the shielding to the interior parts from the dendritic OEGs cooperatively to exhibit “mol. envelope” effects. This mol. microconfinement formed from the crowded OEG dendrons was further investigated through covalently linked or phys. mixed dye. Topol. structures of the polymers are discovered to play a key role in encapsulation of the dye guest and can modulate its transition within the aggregates through the thermally induced phase transitions. In the experiment, the researchers used many compounds, for example, 2,5,8,11-Tetraoxadodecane (cas: 112-49-2SDS of cas: 112-49-2).
2,5,8,11-Tetraoxadodecane (cas: 112-49-2) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. But on the other hand, ethers undergo cleavage by reaction with acids. Ethers feature bent C閳ユ彊閳ユ弲 linkages. In dimethyl ether, the bond angle is 111鎺?and C閳ユ彊 distances are 141 pm. The barrier to rotation about the C閳ユ彊 bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.SDS of cas: 112-49-2
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem