Abstract

<!-- /* Font Definitions */ @font-face {font-family:Wingdings; panose-1:5 0 0 0 0 0 0 0 0 0; mso-font-charset:2; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:0 268435456 0 0 -2147483648 0;} @font-face {font-family:SimSun; panose-1:0 0 0 0 0 0 0 0 0 0; mso-font-alt:??; mso-font-charset:134; mso-generic-font-family:auto; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:1 135135232 16 0 262144 0;} @font-face {font-family:"\@SimSun"; panose-1:0 0 0 0 0 0 0 0 0 0; mso-font-charset:134; mso-generic-font-family:auto; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:1 135135232 16 0 262144 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0in; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} h2 {mso-style-next:Normal; margin-top:12.0pt; margin-right:0in; margin-bottom:4.0pt; margin-left:0in; text-align:justify; line-height:12.0pt; mso-line-height-rule:exactly; mso-pagination:none; page-break-after:avoid; mso-outline-level:2; font-size:10.0pt; mso-bidi-font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:SimSun; mso-font-kerning:1.0pt; mso-fareast-language:ZH-CN;} p.MsoBodyText, li.MsoBodyText, div.MsoBodyText {margin-top:.5gd; margin-right:0in; margin-bottom:2.5pt; margin-left:0in; text-align:justify; line-height:12.0pt; mso-line-height-rule:exactly; mso-pagination:none; font-size:10.0pt; mso-bidi-font-size:11.0pt; font-family:"Times New Roman"; mso-fareast-font-family:SimSun; mso-font-kerning:1.0pt; mso-fareast-language:ZH-CN; mso-bidi-font-weight:bold;} p.MsoBodyTextIndent, li.MsoBodyTextIndent, div.MsoBodyTextIndent {margin:0in; margin-bottom:.0001pt; text-align:justify; text-indent:.5in; line-height:200%; mso-pagination:none; mso-layout-grid-align:none; text-autospace:none; font-size:10.5pt; mso-bidi-font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:SimSun; mso-font-kerning:1.0pt; mso-fareast-language:ZH-CN;} p.MsoBodyText2, li.MsoBodyText2, div.MsoBodyText2 {margin-top:10.0pt; margin-right:0in; margin-bottom:10.0pt; margin-left:0in; text-align:center; line-height:20.0pt; mso-line-height-rule:exactly; mso-pagination:none; font-size:16.0pt; font-family:"Times New Roman"; mso-fareast-font-family:SimSun; mso-font-kerning:1.0pt; mso-fareast-language:ZH-CN;} p.MsoBodyText3, li.MsoBodyText3, div.MsoBodyText3 {margin:0in; margin-bottom:.0001pt; text-align:justify; line-height:200%; mso-pagination:none; font-size:10.5pt; mso-bidi-font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:SimSun; color:#231F20; mso-font-kerning:1.0pt; mso-fareast-language:ZH-CN;} p.MsoBodyTextIndent2, li.MsoBodyTextIndent2, div.MsoBodyTextIndent2 {margin:0in; margin-bottom:.0001pt; text-align:justify; text-indent:.25in; line-height:200%; mso-pagination:none; font-size:10.5pt; mso-bidi-font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:SimSun; mso-font-kerning:1.0pt; mso-fareast-language:ZH-CN;} a:link, span.MsoHyperlink {color:blue; text-decoration:underline; text-underline:single;} a:visited, span.MsoHyperlinkFollowed {color:purple; text-decoration:underline; text-underline:single;} @page Section1 {size:8.5in 11.0in; margin:1.0in 1.25in 1.0in 1.25in; mso-header-margin:.5in; mso-footer-margin:.5in; mso-paper-source:0;} div.Section1 {page:Section1;} /* List Definitions */ @list l0 {mso-list-id:142506829; mso-list-template-ids:551682934;} @list l0:level1 {mso-level-start-at:2; mso-level-tab-stop:27.0pt; mso-level-number-position:left; margin-left:27.0pt; text-indent:-27.0pt;} @list l0:level2 {mso-level-text:"%1\.%2\."; mso-level-tab-stop:27.0pt; mso-level-number-position:left; margin-left:27.0pt; text-indent:-27.0pt;} @list l0:level3 {mso-level-start-at:3; mso-level-text:"%1\.%2\.%3\."; mso-level-tab-stop:.5in; mso-level-number-position:left; margin-left:.5in; text-indent:-.5in;} @list l0:level4 {mso-level-text:"%1\.%2\.%3\.%4\."; mso-level-tab-stop:.5in; mso-level-number-position:left; margin-left:.5in; text-indent:-.5in;} @list l0:level5 {mso-level-text:"%1\.%2\.%3\.%4\.%5\."; mso-level-tab-stop:.75in; mso-level-number-position:left; margin-left:.75in; text-indent:-.75in;} @list l0:level6 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\."; mso-level-tab-stop:.75in; mso-level-number-position:left; margin-left:.75in; text-indent:-.75in;} @list l0:level7 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\."; mso-level-tab-stop:1.0in; mso-level-number-position:left; margin-left:1.0in; text-indent:-1.0in;} @list l0:level8 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\.%8\."; mso-level-tab-stop:1.0in; mso-level-number-position:left; margin-left:1.0in; text-indent:-1.0in;} @list l0:level9 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\.%8\.%9\."; mso-level-tab-stop:1.25in; mso-level-number-position:left; margin-left:1.25in; text-indent:-1.25in;} @list l1 {mso-list-id:193542979; mso-list-type:hybrid; mso-list-template-ids:-300676592 67698703 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;} @list l1:level1 {mso-level-start-at:4; mso-level-tab-stop:.5in; mso-level-number-position:left; text-indent:-.25in;} @list l1:level2 {mso-level-number-format:alpha-lower; mso-level-tab-stop:1.0in; mso-level-number-position:left; text-indent:-.25in;} @list l2 {mso-list-id:220362557; mso-list-type:hybrid; mso-list-template-ids:-1578345424 -46520070 -41362420 67698715 67698703 67698713 67698715 67698703 67698713 67698715;} @list l2:level1 {mso-level-start-at:4; mso-level-number-format:roman-upper; mso-level-tab-stop:.75in; mso-level-number-position:left; margin-left:.75in; text-indent:-.5in;} @list l2:level2 {mso-level-tab-stop:.25in; mso-level-number-position:left; margin-left:.25in; text-indent:-.25in; mso-ascii-font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman"; mso-ansi-font-weight:normal;} @list l3 {mso-list-id:596526203; mso-list-type:hybrid; mso-list-template-ids:263513394 1532241146 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;} @list l3:level1 {mso-level-tab-stop:.5in; mso-level-number-position:left; text-indent:-.25in; mso-fareast-font-family:SimSun;} @list l3:level2 {mso-level-number-format:alpha-lower; mso-level-tab-stop:1.0in; mso-level-number-position:left; text-indent:-.25in;} @list l4 {mso-list-id:693112708; mso-list-template-ids:-1019597924;} @list l4:level1 {mso-level-start-at:3; mso-level-tab-stop:27.0pt; mso-level-number-position:left; margin-left:27.0pt; text-indent:-27.0pt;} @list l4:level2 {mso-level-start-at:2; mso-level-text:"%1\.%2\."; mso-level-tab-stop:63.0pt; mso-level-number-position:left; margin-left:63.0pt; text-indent:-27.0pt;} @list l4:level3 {mso-level-text:"%1\.%2\.%3\."; mso-level-tab-stop:1.5in; mso-level-number-position:left; text-indent:-.5in;} @list l4:level4 {mso-level-text:"%1\.%2\.%3\.%4\."; mso-level-tab-stop:2.0in; mso-level-number-position:left; text-indent:-.5in;} @list l4:level5 {mso-level-text:"%1\.%2\.%3\.%4\.%5\."; mso-level-tab-stop:2.75in; mso-level-number-position:left; margin-left:2.75in; text-indent:-.75in;} @list l4:level6 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\."; mso-level-tab-stop:3.25in; mso-level-number-position:left; margin-left:3.25in; text-indent:-.75in;} @list l4:level7 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\."; mso-level-tab-stop:3.75in; mso-level-number-position:left; margin-left:3.75in; text-indent:-.75in;} @list l4:level8 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\.%8\."; mso-level-tab-stop:4.5in; mso-level-number-position:left; margin-left:4.5in; text-indent:-1.0in;} @list l4:level9 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\.%8\.%9\."; mso-level-tab-stop:5.0in; mso-level-number-position:left; margin-left:5.0in; text-indent:-1.0in;} @list l5 {mso-list-id:788009643; mso-list-type:hybrid; mso-list-template-ids:152499022 -1043035498 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;} @list l5:level1 {mso-level-tab-stop:.5in; mso-level-number-position:left; text-indent:-.25in; mso-ansi-font-weight:bold;} @list l6 {mso-list-id:848717818; mso-list-template-ids:1252948260;} @list l6:level1 {mso-level-start-at:3; mso-level-tab-stop:28.5pt; mso-level-number-position:left; margin-left:28.5pt; text-indent:-28.5pt;} @list l6:level2 {mso-level-text:"%1\.%2\."; mso-level-tab-stop:64.5pt; mso-level-number-position:left; margin-left:64.5pt; text-indent:-28.5pt;} @list l6:level3 {mso-level-text:"%1\.%2\.%3\."; mso-level-tab-stop:1.5in; mso-level-number-position:left; text-indent:-.5in;} @list l6:level4 {mso-level-text:"%1\.%2\.%3\.%4\."; mso-level-tab-stop:2.0in; mso-level-number-position:left; text-indent:-.5in;} @list l6:level5 {mso-level-text:"%1\.%2\.%3\.%4\.%5\."; mso-level-tab-stop:2.75in; mso-level-number-position:left; margin-left:2.75in; text-indent:-.75in;} @list l6:level6 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\."; mso-level-tab-stop:3.25in; mso-level-number-position:left; margin-left:3.25in; text-indent:-.75in;} @list l6:level7 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\."; mso-level-tab-stop:3.75in; mso-level-number-position:left; margin-left:3.75in; text-indent:-.75in;} @list l6:level8 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\.%8\."; mso-level-tab-stop:4.5in; mso-level-number-position:left; margin-left:4.5in; text-indent:-1.0in;} @list l6:level9 {mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\.%8\.%9\."; mso-level-tab-stop:5.0in; mso-level-number-position:left; margin-left:5.0in; text-indent:-1.0in;} @list l7 {mso-list-id:967247396; mso-list-type:hybrid; mso-list-template-ids:1853533362 67698689 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;} @list l7:level1 {mso-level-number-format:bullet; mso-level-text:?; mso-level-tab-stop:.5in; mso-level-number-position:left; text-indent:-.25in; font-family:Symbol; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";} @list l8 {mso-list-id:1522861803; mso-list-type:hybrid; mso-list-template-ids:-70720888 67698703 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;} @list l8:level1 {mso-level-start-at:2; mso-level-tab-stop:.5in; mso-level-number-position:left; text-indent:-.25in;} @list l8:level2 {mso-level-number-format:alpha-lower; mso-level-tab-stop:1.0in; mso-level-number-position:left; text-indent:-.25in;} @list l9 {mso-list-id:1694452016; mso-list-type:hybrid; mso-list-template-ids:-225436168 -1404902678 -151599052 67698715 67698703 67698713 67698715 67698703 67698713 67698715;} @list l9:level1 {mso-level-number-format:roman-upper; mso-level-tab-stop:.75in; mso-level-number-position:left; margin-left:.75in; text-indent:-.5in;} @list l9:level2 {mso-level-tab-stop:1.0in; mso-level-number-position:left; text-indent:-.25in; mso-ascii-font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman"; mso-ansi-font-weight:normal;} @list l9:level3 {mso-level-number-format:roman-lower; mso-level-tab-stop:1.5in; mso-level-number-position:right; text-indent:-9.0pt;} @list l10 {mso-list-id:1841234688; mso-list-template-ids:-996097656;} @list l10:level1 {mso-level-tab-stop:.5in; mso-level-number-position:left; text-indent:-.25in;} @list l10:level2 {mso-level-legal-format:yes; mso-level-text:"%1\.%2"; mso-level-tab-stop:.5in; mso-level-number-position:left; margin-left:.5in; text-indent:-.25in;} @list l10:level3 {mso-level-legal-format:yes; mso-level-text:"%1\.%2\.%3"; mso-level-tab-stop:.75in; mso-level-number-position:left; margin-left:.75in; text-indent:-.5in;} @list l10:level4 {mso-level-legal-format:yes; mso-level-text:"%1\.%2\.%3\.%4"; mso-level-tab-stop:.75in; mso-level-number-position:left; margin-left:.75in; text-indent:-.5in;} @list l10:level5 {mso-level-legal-format:yes; mso-level-text:"%1\.%2\.%3\.%4\.%5"; mso-level-tab-stop:1.0in; mso-level-number-position:left; margin-left:1.0in; text-indent:-.75in;} @list l10:level6 {mso-level-legal-format:yes; mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6"; mso-level-tab-stop:1.0in; mso-level-number-position:left; margin-left:1.0in; text-indent:-.75in;} @list l10:level7 {mso-level-legal-format:yes; mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7"; mso-level-tab-stop:1.25in; mso-level-number-position:left; margin-left:1.25in; text-indent:-1.0in;} @list l10:level8 {mso-level-legal-format:yes; mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\.%8"; mso-level-tab-stop:1.25in; mso-level-number-position:left; margin-left:1.25in; text-indent:-1.0in;} @list l10:level9 {mso-level-legal-format:yes; mso-level-text:"%1\.%2\.%3\.%4\.%5\.%6\.%7\.%8\.%9"; mso-level-tab-stop:1.5in; mso-level-number-position:left; margin-left:1.5in; text-indent:-1.25in;} ol {margin-bottom:0in;} ul {margin-bottom:0in;} --> The present study investigates the binding properties of four dansyl substituted aza-crown ethers with alkali, alkaline earth metal ions and ammonium. The influence of the solvent polarity and protonation on the photophysical properties of the compounds was studied by UV/Vis and fluorescence methods. The host species caused only slight changes on the absorption spectra of the ligands. The fluorescence changes were more pronounced and concentration dependent thus allowing to calculate the binding constants of the process. The most stable complex under our working conditions was the one between Ba²⁺ and DNS18C6.

This work is licensed under a Creative Commons Attribution 4.0 License.