13458-61-2Relevant academic research and scientific papers
Chromogenic sensing of biological thiols using squarylium dye
Shin, In-Sub,Gwon, Seon-Yeong,Kim, Sung-Hoon
, p. 642 - 645 (2014)
A new highly selective probe for biothiols, squarylium dye (SQ), was designed and synthesized. The probe displayed a color change from blue to colorless upon reaction with biothilos such as cysteine (Cys), homocysteine (Hcy) and glutathione (GSH). The competition experiments revealed that no obvious interference was observed by performing the titration with the mixtures of Cys and other amino acids. The results indicated that SQ was highly selective for Cys detection. Moreover, SQ could also serve as a naked-eye probe for Cys with a minimum detectable concentration of approximately 4 μM.
Sensitive and selective detection of cesium via fluorescence quenching
Radaram, Bhasker,Mako, Teresa,Levine, Mindy
, p. 16276 - 16278 (2013)
Herein we report a robust and easy method for detecting cesium metal ion (Cs+) in partially aqueous solutions using the fluorescence quenching of 2,4-bis[4-(N,N-dihydroxyethylamino)phenyl]squaraine. This squaraine dye was found to be both highly sensitive (low limits of detection) and selective (limited response to other metals) for cesium ion detection. The detection is likely based on the metal complexing to the dihydroxyethanolamine moieties, which disrupts the donor-acceptor-donor architecture and leads to efficient quenching.
