@article {1383,
	title = {Sensing metal ions with two new azomethine-thiophene pincer ligands (NSN): Fluorescence and MALDI-TOF-MS applications},
	journal = {Inorganic Chemistry Communications},
	volume = {10},
	number = {8},
	year = {2007},
	note = {<p>200NITimes Cited:9Cited References Count:42</p>
},
	month = {Aug},
	pages = {925-929},
	abstract = {<p>The two new pincer azomethine-thiophene ligands (N,NE{\textquoteright},N,NE{\textquoteright})-N,N{\textquoteright}-(thiophene-2,5-diylbis(methan-1-yl-1-ylidene))bis(naphathalen-2-ylmethanamine) (L1) and (E)-(4,6-dihydropyren-1-yl)-N-((5-((E)-(pyren-1-ylmethylimino)ethyl)thiophen-2-yl)methylene)methanamine (L2), their absorption, fluorescence and MALDI-TOF-MS spectroscopic studies are described. The two systems synthesised combine the emissive probes pyrene and naphthyl with the good chelating properties of a tridentate SN2 donor-set from a thiophene Schiff-base ligand. Both ligands gave analytically pure solid complexes with Ni(II) and Pd(II) salts. The bichromophoric pyrene derivative L2 presents two emission bands in solution, one corresponding to the monomer species and a red-shifted band attributable to the intramolecular excimer. Ni(II) and Pd(II) complexation affects the conformation in solution, increasing the monomer emission at the expense of the excimer band; this effect could be explored in metal ion sensing. System L1 behaves as a non emissive probe. In situ complexation reactions followed by MALDI-TOF-MS spectrometry without matrix support have also been performed; these experiments show that L1 could be a potential chemosensor for Ni(II) and Pd(11). (c) 2007 Elsevier B.V. All rights reserved.</p>
},
	keywords = {complexes, fluorescent chemosensors, intramolecular excimer formation, macrobicycles, maldi-tof-ms, mass-spectrometry, molecular-structure, nickel(ii), nucleic-acids, palladium(ii), performance, receptors, schiff-base macrocycles, thin-film transistors, thiophene},
	isbn = {1387-7003},
	url = {<Go to ISI>://000248769700020},
	author = {Pedras, B. and Santos, H. M. and Fernandes, L. and Covelo, B. and Tamayo, A. and Bertolo, E. and Capelo, J. L. and Aviles, T. and Lodeiro, C.}
}
