Reference of 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane, is researched, Molecular C12H25NO5, CAS is 33941-15-0, about Barium selective chemosensing by diazacrown ether naphthalimide turn-on fluorophores for single ion barium tagging. Author is Thapa, P.; Byrnes, N. K.; Denisenko, A. A.; Foss, F. W. Jr.; Jones, B. J. P.; Mao, J. X.; McDonald, A. D.; Nam, K.; Newhouse, C. A.; Nygren, D. R.; Vuong, T. T.; Woodruff, K..
Single mol. fluorescence detection of barium is investigated for enhancing the sensitivity and robustness of a neutrinoless double beta decay (0νββ) search in 136Xe, the discovery of which would alter our understanding of the nature of neutrinos and the early history of the Universe. A key developmental step is the synthesis of barium selective chemosensors capable of incorporation into ongoing experiments in high-pressure 136Xe gas. Here we report turn-on fluorescent naphthalimide chemosensors containing monoaza- and diaza-crown ethers as agents for single Ba2+ detection. Monoaza-18-crown-6 ether naphthalimide sensors showed sensitivity primarily to Ba2+ and Hg2+, whereas two diaza-18-crown-6 ether naphthalimides revealed a desirable selectivity toward Ba2+. Solution-phase fluorescence and NMR experiments support a photoinduced electron transfer mechanism enabling turn-on fluorescence sensing in the presence of barium ions. Changes in ion-receptor interactions enable effective selectivity between competitive barium, mercury, and potassium ions, with detailed calculations correctly predicting fluorescence responses. With these mols., dry-phase single Ba2+ ion imaging with turnon fluorescence is realized using oil-free microscopy techniques. This represents a significant advance toward a practical method of single Ba2+ detection within large volumes of 136Xe, plausibly enabling a background-free technique to search for the hypothetical process of 0νββ.
《Barium selective chemosensing by diazacrown ether naphthalimide turn-on fluorophores for single ion barium tagging》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound(1,4,7,10,13-Pentaoxa-16-azacyclooctadecane)Reference of 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane.
Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem