Ratiometric chemosensing of Mg2+ ions by a calix[4]arene diamide derivative

Solvent Effect on the Fluorescence Response of Hydroxycoumarin Bearing a Dipicolylamine Binding Site to Metal Ions

“…5,6 Fluorescent receptors for Mg 2+ , which have diaza-18-crown-6, β-diketone, and calixarene moieties for ion recognition, heve been reported. [7][8][9] However, those receptors could not discriminate Mg 2+ from Ca 2+ due to the similar chemical properties of those two cations. 10 Thus, the development of fluorescent probes with higher specificity and selectivity is being pursued in earnest.…”

A Porphyrin‐Related Macrocycle with an Embedded 1,10‐Phenanthroline Moiety: Fluorescent Magnesium(II) Ion Sensor

“…[3] Recently, various families of Mg 2+ -responsive fluorescent probes have been developed. These probes have receptor groups based upon moieties including a charged b diketone, [4] diaza-18-crown-6, [5] benzo-15-crown-5, [6] calix [4]arene, [7] and imine-linked aromatics.…”

Design and synthesis of some imidazolyl derivatives: Photophysical studies and application in detection of anions

“…Phenanthroimidazole based systems due to the dramatic supramolecular properties, stability, ease of synthesis, a high extinction coefficient and tuneable photophysical properties have been explored as potential chromophores in a molecular-tweezers system for explosives [45], amine sensors [46,47], fluorophore in a super-radiant laser dye [48], fluorescent tag [49], OLED materials [50][51][52] and chemosensors [53][54][55][56]. The one-step synthesis of phenanthroimidazole derivatives has remarkably increased our own interest to involve a variety of aldehydes that may further extend the way for the introduction of other functionalities and to extend the conjugation for different purposes.…”

“…First, ICT get restricted, due to the formation of a Michael adduct, DCPPI-CNand fluorescence quenching observed at 614 nm. Secondly, the interaction of CNwith second ionophore, the -NH fragment of resultant adduct, DCPPI-CNled to enhance ICT due to an increase in charge density on the phenanthroimidazolyl unit, that finally led to a significant fluorescence enhancement (at 490 nm)[19][20][21][22][23][24][25][26][27][28][29][50][51][52][53][54][55][56][57][58].Moreover, since the changes in optoelectronic behavior of probe in the presence of different anions so rapid it was difficult to obtain a precise kinetic plot. We tried to obtain kinetic plot by the addition of CN -(~20 equiv) to a solution of DCPPI and measured the emission spectra at regular time interval.…”