Herein, a facile iron-sulfur double-doping strategy is developed for the synthesis of highly active FeNx/S-NC catalyst by pyrolysis double-doped polypyrrole precursor, PPy-Fe3+-SCN-. The unique precursor firstly prepared coordinating SCN- with Fe3+ ions adsorbed in situ into matrixes (PPy-Fe3+) during an oxidative polymerization process. Subsequent PPy-Fe3+-SCN- produced containing sites Fe-Nx ...

Molecularly well-defined Ni sites at heterogeneous interfaces were derived from the incorporation of Ni2+ ions into heteroatom-doped graphene. The molecular Ni sites on graphene were redox-active. However, they showed poor activity toward oxygen evolution reaction (OER) in KOH aqueous solution. We demonstrated for the first time that the presence of Fe3+ ions in the solution could bond at the v...

A series of sodium iron germanate glasses, with general composition 0.3Na2O±xFe2O3±(0.7 ) x)GeO2 (06 x6 0:15), has been prepared by conventional melting and casting. The chemical states of the various elemental components have been investigated by X-ray photoelectron spectroscopy (XPS) from fracture surfaces produced in situ. The analysis of the Fe 3p core level spectra of the glasses which con...

The identification of metal ion binding sites is important for protein function annotation and the design of new drug molecules. This study presents an effective method of analyzing and identifying the binding residues of metal ions based solely on sequence information. Ten metal ions were extracted from the BioLip database: Zn2+, Cu2+, Fe2+, Fe3+, Ca2+, Mg2+, Mn2+, Na+, K+ and Co2+. The analys...

The layered perovskite YBaCuFeO5 (YBCFO) is able to adopt chiral magnetic order up unexpectedly high temperatures, paving the way strong magnetoelectric coupling at room temperature. In this A-site cations are fully ordered whereas occupancy of B-sites strongly depend on preparation process. Though structure not geometrically frustrated, presence partial Fe3+/Cu2+ disorder produces frustration....

Multi-modal imaging-guided cancer photothermal therapy (PTT) with advanced theranostic nanoagents can efficiently improve therapeutic efficacy and reduce treatment side effects. Herein, we have developed a theranostic nanoagent based on indocyanine green (ICG)-loaded polydopamine (PDA)-iron ions coordination nanoparticles (PDA-Fe3+-ICG NPs), which are used for photoacoustic (PA) and magnetic re...

Herein we describe the synthesis, structural and magnetic characterisation of three transition metal cluster complexes that feature the polytopic ligand N-(2-pyridyl)-3-carboxypropanamide (H2L): [Fe3(III)Fe2(II)(HL)6(O)(H2O)3][ClO4]5·3MeCN·4H2O, 1, [Co8(HL)8(O)(OH)4(MeOH)3(H2O)]-[ClO4]3·5MeOH·2H2O, 2, and [Cu6(L(ox))4(MeOH)(H2O)3]·MeOH, 3. Complex 1 is a mixed valence penta-nuclear iron cluster...

In the presence of NADH- reductases (dihydrolipoamide: NAD oxidoreductase E. C.1.8.1.4 from pig heart or from Clostridium kluyveri; frequently also addressed as "diaphorases") and NADH lucigenin strongly increases ethylene production from a-keto-methylthiobutyrate (KMB) as an indicator for strong oxidants of the OH-radical type. These reactions are further stimulated in the presence of Fe3+ ion...

The paper reports on the synthesis and fluorescence characteristics of novel 1,8-naphthalimide fluorophore. It was configured as a “fluorophore-spacerreceptor” system able to act pH-probe via PET (photoinduced electron transfer) sensing mechanism. Due tertiary amine receptor probe showed “off-on” switching properties under transition from alkaline acid media. Also, ability detect metal ions in ...