Red-emitting heteroleptic iridium(III) complexes: photophysical and cell labeling study.

Two red-emitting heteroleptic iridium(III) complexes (Ir-p and Ir-q) were synthesized and their photophysical and biological properties were analyzed. After their structures have been confirmed by several techniques, such as H NMR, C NMR, FT-IR, UV-Vis, and MALDI TOF analyses, their luminescence behavior was investigated in ethanol and PBS (physiological medium, pH ~ 7.4) solutions.

Red-Emitting Hybrid Based on Eu-dbm Complex Anchored on Silica Nanoparticles Surface by Carboxylic Acid for Biomarker Application.

Luminescent organic-inorganic hybrids containing lanthanides (Ln) have been prominent for applications such as luminescent bio-probes in biological assays. In this sense, a luminescent hybrid based on dense silica (SiO) nanospheres decorated with Eu β-diketonate complexes using dibenzoylmethane (Hdbm) as a luminescent antenna was developed by using a hierarchical organization in four steps: (i) anchoring of 3-aminopropyltriethoxysilane (APTES) organosilane on the SiO surface, (ii) formation of a carboxylic acid ligand, (iii) coordination of Eu to the carboxylate groups and (iv) coordination of dbm to Eu. The hybrid structure was elucidated through the correlation of thermogravimetry, silicon nuclear magnetic resonance and photoluminescence.