%ALiu, Taihong [Department of Chemistry and Environmental Science College of Science and Liberal Arts New Jersey Institute of Technology 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%ALiu, Taihong [Department of Chemistry and Environmental Science; College of Science and Liberal Arts; New Jersey Institute of Technology; 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%ALiu, Xinglei [Department of Chemistry and Environmental Science College of Science and Liberal Arts New Jersey Institute of Technology 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%ALiu, Xinglei [Department of Chemistry and Environmental Science; College of Science and Liberal Arts; New Jersey Institute of Technology; 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%AValencia, Maira [Department of Chemistry and Environmental Science College of Science and Liberal Arts New Jersey Institute of Technology 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%AValencia, Maira [Department of Chemistry and Environmental Science; College of Science and Liberal Arts; New Jersey Institute of Technology; 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%ASui, Binglin [Department of Chemistry and Environmental Science College of Science and Liberal Arts New Jersey Institute of Technology 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%ASui, Binglin [Department of Chemistry and Environmental Science; College of Science and Liberal Arts; New Jersey Institute of Technology; 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%AZhang, Yuanwei [Department of Chemistry and Environmental Science College of Science and Liberal Arts New Jersey Institute of Technology 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%AZhang, Yuanwei [Department of Chemistry and Environmental Science; College of Science and Liberal Arts; New Jersey Institute of Technology; 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%ABelfield, Kevin [Department of Chemistry and Environmental Science College of Science and Liberal Arts New Jersey Institute of Technology 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%ABelfield, Kevin [Department of Chemistry and Environmental Science; College of Science and Liberal Arts; New Jersey Institute of Technology; 323 Martin Luther King, Jr. Blvd. 07102 Newark NJ USA]%BJournal Name: European Journal of Organic Chemistry; Journal Volume: 2017; Journal Issue: 27; Related Information: CHORUS Timestamp: 2023-09-16 18:27:11 %D2017%IWiley Blackwell (John Wiley & Sons) %JJournal Name: European Journal of Organic Chemistry; Journal Volume: 2017; Journal Issue: 27; Related Information: CHORUS Timestamp: 2023-09-16 18:27:11 %K %MOSTI ID: 10033593 %PMedium: X %TFar‐Red‐Emitting TEG‐Substituted Squaraine Dye: Synthesis, Optical Properties, and Selective Detection of Cyanide in Aqueous Solution %X

A comprehensive study of the photophysical properties of triethylene glycol monomethyl ether (TEG)‐substituted squaraine dye SQ1is presented. SQ1exhibits strong absorption and intense fluorescence emission in the far‐red spectral region and high photostability. Interestingly, bis‐tegylated SQ1was characterized to exhibit properties different from its tetrahydroxy analog (SQ2), to which we ascribe attenuation of intermolecular interactions as a result of steric hindrance through introduction of two TEG chains adjacent to the squaraine core. The photophysical properties of SQ1were also investigated as a function of temperature and pH. In cetyltrimethylammonium bromide (CTAB) micellar media (1.0 mm), the fluorescence quantum yield of SQ1increased dramatically to 0.22, compared with 0.02 in water. Based on this discovery, SQ1was found to display excellent sensitivity and selectivity to the presence of cyanide ions (CN), with a limit of detection of 1.7 µm. The hypothesized CNsensing mechanism was probed, and visual test strips were developed. This work broadens the family of squaraine dyes and demonstrates SQ1for use as a fluorescent or visual sensing probe.

%0Journal Article