Danel, Andrzej et al. published their research in Dyes and Pigments in 2021 | CAS: 66943-05-3

1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) 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 are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides.Electric Literature of C10H21NO4

1H-pyrazolo[3,4-b]quinoline derivative with the chelating substituent and synthesis and spectral properties as a fluorescent sensor for cation detection was written by Danel, Andrzej;Kolbus, Anna;Grabka, Danuta;Kucharek, Mateusz;Pokladko-Kowar, Monika. And the article was included in Dyes and Pigments in 2021.Electric Literature of C10H21NO4 This article mentions the following:

A new fluorescent 1H-pyrazolo[3,4-b]quinoline derivative (PQ4K, I) with a crown moiety was synthesized and investigated as a potential sensor for certain cations. UV-visible spectroscopy was used to investigate the spectral properties of PQ4K. The compound absorbed blue light and emitted a low intensity blue-green light. After dissolving PQ4K in methanol and acetonitrile, the fluorescence response for the presence of selected di- and trivalent ions like Zn2+, Co2+, Ni2+, Ca2+, Pb2+, Al3+, Cr3+, Cd2+, Cu2+, Hg2+ was checked. The PQ4K solutions strongly responded to some metal ions increasing the fluorescence intensity and the red shift of the fluorescence spectrum. The highest yields was observed for the Pb2+ ions in the PQ4K-methanol solution and for the Ca2+, Cd2+, Pb2+ ions in the PQ4K-acetonitrile solution No increase in the fluorescence intensity for Hg2+ ions was observed Much higher quantum yields were observed for solutions with acetonitrile than with methanol. In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3Electric Literature of C10H21NO4).

1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) 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 are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides.Electric Literature of C10H21NO4

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