Synthesis and fluorescence behaviour of crown and azacrown ethers carrying the dansyl fluorophore as a pendant in acetonitrile solution

Stepwise interactions, sodium ion photoejection and proton-transfer inhibition in a crown-ether and proton-transfer dye

“…The crown-ether rings are frequently used as fluoroionophore complexing sites. They possess a great structural variety that permits to reach a high selectivity and sensitivity in metal ion analysis [1,2,[5][6][7][8][9][10][11][12][13][14][15][16][17]. The most interesting changes are obtained when the complexation process influences the intramolecular charge and proton transfer (ICT, IPT) taking place in the fluorophore fragment.…”

1H NMR and spectrophotometric study of alkaline metal ion complexes with N-dansyl aza-18-crown-6

“…The A18C6-Dns was synthesized according to the procedure described by Sulowska [4,10] using 1.93 mmol 1,4,7,10,13-pentaoxa-16-azacyclodecane, 2.00 mmol of 5-dimethylamine-1-naphthylenosulphonic chloride and 2 mmol anhydrous caesium carbonate.…”

“…Chromoionophores are an important group of supramolecular ligands whose absorption and fluorescence spectra change upon complexation [1][2][3][4][5][6][7][8]. A typical fluorescent moiety used in chemistry for labelling different classes of compounds is the dansyl (5-dimethylamino-1-naphtyl) fragment.…”

The Fluorescence Properties of Free and Cation-complexed Lariat Ethers having Sidearms Terminated by a Benzene Ring

“…It was also a component in the ditopic receptor noted above [27]. The dansyl group, a substituted naphthalene residue, is highly fluorescent and has been incorporated in both one-and two-armed lariat ether receptors [33]. We had previously prepared N,N 0 -bis(dansyl)-4,13-diaza-18-crown-6 for use in fluorescent studies [34] of hydraphile channel compounds [35].…”