Synthesis and fluorescence properties of 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazole derivatives and their terbium complexes was written by Zhang, Wu;Chai, Yuchao;Li, Kangyun;Chen, Yanwen;Yan, Dong;Guo, Dongcai. And the article was included in Luminescence in 2014.Synthetic Route of C9H10O4 This article mentions the following:
Synthesis of eight novel 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazole derivatives I [R = H, CH3, OCH3, etc.] and their corresponding Tb3+ complexes was described. The fluorescence properties and fluorescence quantum yields of the target complexes were investigated, and the result showed that the ligands were found to be an efficient sensitizer for Tb3+ luminescence, and the target complexes exhibited characteristic fluorescence emissions of Tb3+ ion. The fluorescence intensity of the complex substituted by chlorine was stronger than that of other complexes. The substituent nature has a great effect upon the electrochem. properties of the target complexes. The results showed that the introduction of the electron-withdrawing groups tended to decrease the oxidation potential and HOMO energy levels of the target Tb3+ complexes; however, introduction of the electron-donating groups could increase the corresponding complex oxidation potential and HOMO energy levels. In the experiment, the researchers used many compounds, for example, 2-(4-Methoxyphenoxy)acetic acid (cas: 1877-75-4Synthetic Route of C9H10O4).
2-(4-Methoxyphenoxy)acetic acid (cas: 1877-75-4) 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. The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom. Complexation of the magnesium atom stabilizes the Grignard reagent and helps to keep it in solution.Synthetic Route of C9H10O4
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem