Two lysosome-targeting fluorescent anion transporters derived from coumarins, trifluoromethylated arylsquaramides and morpholines were synthesized, and their specificity and efficiency to target and alkalize lysosomes were investigated. They are able to target lysosomes specifically. Compared with the previous analogue without trifluoromethyl substituents, these two conjugates, in particular the one
Tripodal squaramide conjugates as highly effective transmembrane anion transporters
作者:Xiong-Jie Cai、Zhi Li、Wen-Hua Chen
DOI:10.1016/j.bmcl.2017.03.024
日期:2017.5
Two tripodal squaramide conjugates having 4-(trifluoromethyl)phenyl and 3,5-bis(trifluoromethyl)phenyl substituents were synthesized and found to exhibit highly efficient transmembraneanion transport with the EC50 values being 0.14 and 0.75mol%, respectively. Though one of them has been reported to act as a strong anion receptor, in particular for sulfate anions, these two compounds exhibit no significant
Fluorescent squaramides as anion receptors and transmembrane anion transporters
作者:Xiaoping Bao、Xin Wu、Stuart N. Berry、Ethan N. W. Howe、Young-Tae Chang、Philip A. Gale
DOI:10.1039/c7cc08706c
日期:——
A series of squaramide-based anion transporters functionalised with the 1,8-naphthalimide fluorophore has been developed for improved ionophoric activity and fluorescent imaging in cells.
Squaramide-based tripodal receptors for selective recognition of sulfate anion
作者:Can Jin、Man Zhang、Lin Wu、Yangfan Guan、Yi Pan、Juli Jiang、Chen Lin、Leyong Wang
DOI:10.1039/c3cc00196b
日期:——
Squaramide-based tripodal anionreceptors have been prepared and their anion binding properties with various inorganic anions were investigated. Receptor formed a dimeric complex in solid state and a 1 : 1 complex in solution with SO(4)(2-). All receptors could selectively encapsulate SO(4)(2-)via hydrogen bonds over other examined anions.
Colorimetric and Luminescent Sensors for Chloride: Hydrogen Bonding vs Deprotonation
作者:Robert B. P. Elmes、Peter Turner、Katrina A. Jolliffe
DOI:10.1021/ol402500q
日期:2013.11.15
The synthesis and photophysical properties of four squaramide based fluorescent anion sensors (1-4) are described. These luminescent compounds showed selectivity for Cl- over various other anions with concomitant changes in both their UV/visible and fluorescence properties upon Cl- addition, attributed to initial H-bonding followed by NH deprotonation in the presence of excess Cl-, signaled by a color change. The nature of the electron withdrawing aryl substituents is directly related to the H-bonding ability/acidity of the squaramide protons and can be used to tune the deprotonation behavior.