Complexation of alkali metal and alkaline earth ions by anthracene based fluorophores with one and two appended monoaza coronand receptorsElectronic supplementary information (ESI) available: figs. S1–S20: additional emission spectra. See http://www.rsc.org/suppdata/dt/b2/b210269b/

A new pyridine-based 12-membered macrocycle functionalised with different fluorescent subunits; coordination chemistry towards CuII, ZnII, CdII, HgII, and PbII

“…Frequently, some atoms of the fluorogenic fragment participate in the complexation, thus influencing the selectivity of guest binding event, and consequently the transduction mechanism leading to a change into the fluorescence emission of the sensor. Many of the reported fluoroionophores feature polyoxa-, [10][11][12] polyaza-, [13][14][15][16][17] and azaoxa-macrocycles [18][19][20][21] as receptor units, whereas few examples are reported of fluorescent chemosensors for metal cations comprising S-donor macrocycles as binding site. [22][23][24] Following our interest into the coordination chemistry and analytical applications of mixed thia-aza macrocycles containing heteroaryl fragments, [25][26][27][28][29][30] we describe here the coordination properties of the new pyridine based, N 2 S 2 -donating 12-membered macrocycle 2,8-dithia-5-aza-2,6-pyridinophane (L 1 ) and of its N-aminopropyl derivative (L 2 ) (Scheme 1) with Cu II , Zn II , Cd II , Hg II , and Pb II .…”

A Proton-Triggered ON−OFF−ON Fluorescent Chemosensor for Mg(II) via Twisted Intramolecular Charge Transfer

“…In contrast, the nonfluorescent 2b ·H + system did not become fluorescent in the presence of any of the metal ions. The exclusive selectivity for Mg 2+ can be attributed to the lowest electron-donating ability of benzocrown ether because of its highest surface charge density …”

Conjugated compounds in supramolecular informational systems: A review

“…The presence of ionophore fragments in conju gated compounds in many cases not only changes the absorbance spectra of these compounds upon contact with the corresponding ions (ionochromism), but also provides fluoro ionophoric properties of such systems [57,60,[63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79][80].…”