Barry, Dawn E. et al. published their research in Inorganic Chemistry in 2020 | CAS: 111-77-3

2-(2-Methoxyethoxy)ethanol (cas: 111-77-3) 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. 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.Reference of 111-77-3

Formation of Enantiomerically Pure Luminescent Triple-Stranded Dimetallic Europium Helicates and Their Corresponding Hierarchical Self-Assembly Formation in Protic Polar Solutions was written by Barry, Dawn E.;Kitchen, Jonathan A.;Pandurangan, Komala;Savyasachi, Aramballi Jayant;Peacock, Robert D.;Gunnlaugsson, Thorfinnur. And the article was included in Inorganic Chemistry in 2020.Reference of 111-77-3 This article mentions the following:

Ditopic helicate ligands consisting of two enantiomeric naphthalene units connected to two diethylene glycol substituted pyridine-2,6-dicarboxamide moieties linked by a xylene spacer (L1 and L2) were synthesized for the formation of dinuclear EuIII luminescent chiral helical assemblies (Eu2·L3) in competitive organic and protic solvent media. Spectroscopic anal. revealed formation of the 2:3 (Eu2·L3) and 2:2 (Eu2·L2) species in methanolic solutions CD and circularly polarized luminescence (CPL) spectroscopy confirmed the chiral purity of the helical systems, while SEM imaging demonstrated the formation of hierarchical self-assemblies with spherical morphologies. Ligands L1 and L2 were synthesized for use in the formation of dinuclear EuIII 2:3 (Eu2·L3) luminescent chiral helical assemblies in competitive media. CD and circularly polarized luminescence (CPL) spectroscopy confirmed the chiral purity of the enantiomeric helical systems, while the use of SEM imaging illustrated aggregation of the Eu2·L13 complex in both MeOH and MeOH/water solvent mixtures and the formation of hierarchical self-assemblies with spherical morphologies and diameter sizes ranging from 0.079 to 0.681μm. In the experiment, the researchers used many compounds, for example, 2-(2-Methoxyethoxy)ethanol (cas: 111-77-3Reference of 111-77-3).

2-(2-Methoxyethoxy)ethanol (cas: 111-77-3) 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. 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.Reference of 111-77-3

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem