Controlling the Isomerization of Photoresponsive Molecules through a Limiting Tautomerization Strategy was written by Duan, Yongli;Zhao, Haiquan;Xue, Guodong;Sun, Fanxi;Stricker, Friedrich;Wang, Zhen;Mao, Lijun;He, Chao;de Alaniz, Javier Read;Zheng, Yonghao;Wang, Dongsheng. And the article was included in Journal of Physical Chemistry B in 2022.Related Products of 66943-05-3 This article mentions the following:
Controlling the multistage photoresponsivity remains a challenge, in part, due to the spontaneous tautomerization between isomers. Herein, we present a strategy to access three independent states (linear, cyclic keto, and cyclic enolate) of crown ether (CE)-substituted donor-acceptor Stenhouse adducts (DASAs) by limiting the tautomerization of the closed isomers. The linear-cyclic keto isomerization is reversibly triggered by treatment with metal ions (Na+ or K+) and CE, while the linear-cyclic enolate isomerization is induced by green light and heat. D. functional theory and mol. dynamics calculation results suggest that the steric effect and supramol. interaction between the electron-donating and electron-withdrawing moieties play an important role in hindering the tautomerization between cyclic keto and cyclic enolate DASA-CE. The strategy to influence key steps in the photoswitching process inspires well-controlled multistage isomerization of photoresponsive mols. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3Related Products of 66943-05-3).
1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. But ether is more polar than alkenes. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O 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.Related Products of 66943-05-3
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem