Unknown

Dataset Information

0

Self-assembly of a helical zinc-europium complex: speciation in aqueous solution and luminescence.


ABSTRACT: Two new tridentate(NNO)-bidentate(NN) compartmental ligands, HL(5) and HL(6), are synthesized from pyridine and benzimidazole synthons. They react in aqueous solution under physiological conditions with Zn(II), Ln(III), or a mixture thereof, to yield complexes of different stoichiometries, 1:3, 2:2, 2:3, 1:1:3, the speciation of which is established by UV-visible titrations and ESI mass spectrometry. Photophysical studies of the Eu(III)-containing solutions in Tris-HCl 0.1 M (pH = 7.4) show that lanthanide luminescence arises from a unique N6O3 coordination site with pseudo D 3 symmetry. Relevant parameters such as crystal field splitting, lifetime, radiative lifetime, and intrinsic quantum yield perfectly match those reported for dinuclear 4f-4f helicates in which the Eu(III) ion has the same coordination environment.

SUBMITTER: Deiters E 

PROVIDER: S-EPMC3982565 | BioStudies | 2013-01-01T00:00:00Z

REPOSITORIES: biostudies

Similar Datasets

2010-01-01 | S-EPMC3011704 | BioStudies
1000-01-01 | S-EPMC3344402 | BioStudies
1000-01-01 | S-EPMC3050161 | BioStudies
2021-01-01 | S-EPMC7807471 | BioStudies
1000-01-01 | S-EPMC3089347 | BioStudies
1000-01-01 | S-EPMC2971428 | BioStudies
1000-01-01 | S-EPMC3009253 | BioStudies
2009-01-01 | S-EPMC2873866 | BioStudies
1000-01-01 | S-EPMC6099393 | BioStudies
2011-01-01 | S-EPMC3200740 | BioStudies