ABSTRACT
Two series of Cd-Ln and Ni-Ln clusters [Ln8Cd24L12(OAc)44(48)Cl4(0)] and [Ln8Ni6L6(OAc)24(EtOH)6(H2O)2] were constructed using a flexible ligand. The Cd-Ln clusters exhibit interesting nano-drum-like structures which allows direct visualization by TEM. Luminex MicroPlex Microspheres loaded with the Cd-Sm cluster were visualized using epifluorescence microscopy. Cytotoxicity studies on A549 and AGS cancer cell lines showed that the materials have mild to moderate cytotoxicity.
Subject(s)
Lanthanoid Series Elements/chemistry , Nanostructures/chemistry , A549 Cells , Cell Line, Tumor , Crystallography, X-Ray , Humans , Ligands , Models, MolecularABSTRACT
Chromophores that incorporate f-block elements have considerable potential for use in bioimaging applications because of their advantageous photophysical properties compared to organic dye, which are currently widely used. We are developing new classes of lanthanide-based self-assembling molecular nanoparticles as reporters for imaging and as multi-functional nanoprobes or nanosensors for use with biological samples. One class of these materials, which we call lanthanide "nano-drums", are homogeneous 4d-4f clusters approximately 25 to 30 Å in diameter. These are capable of emitting from the visible to near-infrared wavelengths. Here, we present the synthesis, crystal structure, photophysical properties and comparative cytotoxicity data for a 32 metal Eu-Cd nano-drum [Eu(8)Cd(24)L(12)(OAc)(48)] (1). We also explored the imaging capabilities of this nano-drum using epifluorescence, TIRF, and two-photon microscopy platforms.
Subject(s)
Lanthanoid Series Elements/chemistry , Nanoparticles/chemistry , Optical Imaging , Organometallic Compounds/pharmacology , Cell Line, Tumor , Cell Proliferation/drug effects , Dose-Response Relationship, Drug , Humans , Models, Molecular , Molecular Structure , Organometallic Compounds/chemical synthesis , Organometallic Compounds/chemistry , Structure-Activity RelationshipABSTRACT
We are developing a new class of lanthanide-based self-assembling molecular nanoparticles as potential reporter molecules for imaging, and as multi-functional nanoprobes or nanosensors in diagnostic systems. These lanthanide "nano-drums" are homogeneous 4d-4f clusters approximately 25 to 30 Å in diameter that can emit from the visible to near-infrared (NIR) wavelengths. Here, we present syntheses, crystal structures, photophysical properties, and comparative cytotoxicity data for six nano-drums containing either Eu, Tb, Lu, Er, Yb or Ho. Imaging capabilities of these nano-drums are demonstrated using epifluorescence, total internal reflection fluorescence (TIRF), and two-photon microscopy. We discuss how these molecular nanoparticles can to be adapted for a range of assays, particularly by taking advantage of functionalization strategies with chemical moieties to enable conjugation to protein or nucleic acids.
Subject(s)
Antineoplastic Agents/pharmacology , Lanthanoid Series Elements/chemistry , Metal Nanoparticles/chemistry , Organometallic Compounds/pharmacology , Antineoplastic Agents/chemical synthesis , Antineoplastic Agents/chemistry , Biomedical Research , Cell Line, Tumor , Cell Proliferation/drug effects , Dose-Response Relationship, Drug , Drug Screening Assays, Antitumor , Humans , Models, Molecular , Molecular Structure , Nanomedicine , Organometallic Compounds/chemical synthesis , Organometallic Compounds/chemistry , Structure-Activity RelationshipABSTRACT
The reaction of Fe(N(SiMe(3))(2))(3) with PH(3) in THF at 100 °C gives amorphous FeP(2) in high yield. As an anode material in a Li ion battery, this material shows remarkable performance toward electrochemical lithiation/delithation, with gravimetric discharge and charge capacities of 1258 and 766 mA h g(-1), respectively, translating to 61% reversibility on the first cycle and a discharge capacity of 906 mA h g(-1) after 10 cycles. This translates to 66% retention of the theoretical full conversion capacity of FeP(2) (1365 mA h g(-1)).
ABSTRACT
The air stable tetra-phosphine complexes trans-MCl(2)(PH(3))(4) (M = Ru, Os) are formed in high yield from reactions of MCl(3).3H(2)O with PH(3) in MeOH.
