Luminescent nanohybrids based on silica and silylated Ru(II)—Yb(III) heterobinuclear complex: new tools for biological media analysis

Abstract

nanohybrids based on silica and silylated Ru(II)-Yb(III) heterobinuclear complex: new tools for biological media analysis. (2019) Nanotechnology, 31 (8). 085709.

Solvothermal synthesis and characterization of ytterbium/iron mixed oxide nanoparticles with potential functionalities for applications as multiplatform contrast agent in medical image techniques

“…11 show mean (bars) and standard deviation of the This work shows for the first time, GSH hybrid ytterbium iron oxide NPs. Although few results about cytotoxicity of ytterbium/iron oxide NPs have been reported, some works present results about biocompatibility for different hybrid NPs containing ytterbium, showing a dose dependency for cytotoxicity, as well as an increase of cell viability when NPs are functionalized [48,49]. The most remarkable results that we can observe from these experiments is the higher cell viability obtained for functionalized NPs.…”

Shining New Light on Biological Systems: Luminescent Transition Metal Complexes for Bioimaging and Biosensing Applications

“…Sabio and co-workers have developed a dual-emissive nanoprobe by covalently immobilizing an alkoxysilyl-modified heterobimetallic ruthenium(II)−ytterbium(III) complex (185) onto the surface of SiNPs. 366 Upon photoexcitation at 455 nm, the nanoprobe exhibits both ruthenium(II)-and ytterbium(III)-based luminescence centered at ca. 610 and 980 nm, respectively.…”

Red-Emitting Hybrid Based on Eu3+-dbm Complex Anchored on Silica Nanoparticles Surface by Carboxylic Acid for Biomarker Application

“…The photokinetic features of S 1 -[Eu] and S 1 -[Eu(dbm)] hybrids were further elucidated by emission decay curves, Figure 6B and the 5 D 0 excited state lifetimes (τ) are listed in Table 2. Since the Eu 3+ ions can be inserted in several chemical environments when coordinated on the surface of the silica particle, we determined τ through the Inokuti-Hirayama model shown in Equation (1), which gives us a mean value of all excited-state lifetimes. As the 5 D 0 state lifetime depends on radiative (A rad ) and nonradiative (A nrad ) decay rates, τ = (A rad +A nrad ) −1 , it is possible to get the intrinsic emission quantum yield (φ Ln Ln ) of Eu 3+ -φ Ln Ln = A rad /(A rad +A nrad ) [55].…”

“…Clinical diagnosis by imaging is expanding due to the development of sensitive and non-invasive techniques such as confocal or fluorescence microscopy, appearing as powerful tools for exploratory analyses of several biological processes and internal structural information of healthy and cancerogenous cells [1][2][3]. Among several biomaterials applied in bioimaging, luminescent biomarkers are widely used as contrast agents for in vivo and in vitro, clinical assays, acting as bio-probes responsible by imaging and clinical information of the cellular environment [4,5].…”