Ligand-Based Luminescence

Reeves, Z. R. Mann, K. L. V. Jeffery, J. C. McCleverty, J. A. Ward, M. D. Barigelletti, F. Armaroli, N. Lanthanide complexes of a new sterically hindered potentially hexadentate podand ligand based on a tris(pyrazolyl)borate core crystal structures, solution structures and luminescence properties. J. Chem. Soc., Dalton Trans. 1999, 349-355. 

Carboxylates With the aim of developing highly luminescent Er111 complexes for advanced photonic applications, some of the research concentrates on the synthesis of new ligands, based on simple molecular frameworks such as alkyl chains or benzene rings fitted with carboxylate groups for coordination to the lanthanide ions. For instance, the photophys-... 

The good encryption of lanthanide ions in DOTA-type molecules has also prompted the development of luminescent probes based on this structure, particularly by substituting DTMA, 1,4,7,10-tetrakis(methylcarbamoylmethyl)-1,4,7,10-tetraazacyclododecane. For instance, phenacyl and phenylphenacyl substituents have been grafted onto DTMA and the corresponding ligands, LI and L2 (Fig. 4.40) form stable 1 1 complexes in water with lanthanide ions (log/fi 12-13 at 295 K). The structure of [Tb(Ll)(H20)]3+ (Fig. 4.44) shows the ion well encapsulated into the cavity formed by the macrocyclic platform and... 

Neve, F Crispini, A. Serroni, S. Loiseau, F. Campagna, S. (2001). Novel dinuclear luminescent compounds based on iridium(III) cyclometalated chromophores and containing bridging ligands with ester-linked chelating sites. Inorganic Chemistry, Vol. 40, pp. 1093-1101. 

In recent years, square planar platinum(II) systems bearing cyclometalating tridentate ligands based on 6-phenyl-2,2 -bipyridine have been demonstrated to offer favorable photophysical characteristics compared to 2,2 6, 2"-terpyridine analogues, and interest in these luminescent cyclometalated complexes has proliferated [16, 17, 38]. Like tris(2,2 -bipyridine)rutheni-... 

Table 3 Luminescent probes based on europium(in) tetracycline complexes ligand structures and corresponding analytes...

Table 1) by oxygen. Though, the Stern-Volmer plot shows only a weak quenching of luminescence intensity. Thus, this oxygen sensor can provide only a moderate sensitivity. A selection of oxygen-sensitive Tb " complexes with macrocyclic ligands based on a 1,4,7,10-tetraazacyclododecane (cyclen) structure (see, e.g., complex 7 in Sect. 2.1) has been presented by Parker [25]. 

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