Synthesis and Characterizations of MoS Nanoflowers and Spectroscopic Study of their Interaction with Bovine Serum Albumin.

Molybdenum disulfide nanoflowers (MoS NFs) were prepared by hydrothermal method. The prepared MoS NFs was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), specific surface areas, Raman and X-ray photoelectron spectroscopy (XPS). The characterization results show that the flower-like spherical MoS is composed of many ultra-thin nanosheets with an average diameter of about 300-400 nm.

Detection of intracellular microRNA-21 for cancer diagnosis by a nanosystem containing a ZnO@polydopamine and DNAzyme probe.

MicroRNAs (miRNAs) are a series of single-stranded non-coding ribonucleic acid (RNA) molecules which associated closely with various human diseases. Efficient strategies for detecting miRNAs are of great significance to cancer diagnosis and prognosis. Here we provide a novel nanosystem that can be applied for the detection of miRNAs.

One-pot preparation of supramolecularly functionalized silver nanoparticles for surface plasmon resonance based dual-modal sensing of phytotoxic polychlorinated biphenyl.

Polychlorinated biphenyls (PCBs), as a member of persistent organic pollutants (POPs), have posed a risk to humans and the environment until today. The monitoring of phytotoxic PCB which is toxic to plants, is especially important for ecological early warning and pollution management. In this work, β-cyclodextrin modified silver nanoparticles are prepared in a one-pot method, integrating the synthesis and surface modification in one step.

Perylene tetra-(alkoxycarbonyl) derivative and its copper chelate for selective sensing of fluoride ions.

Two novel fluoride ion fluorescent probes (P1 and P2) containing perylene tetra-(alkoxycarbonyl) derivative (PTAC) and its copper chelate were designed and synthesized. The identification properties of the probes were studied by absorption and fluorescence methods. The results showed that the probes were highly selective and sensitive to fluoride ions.

Molecular dynamics study of low molecular weight gel forming salt-triggered dipeptide.

Molecular dynamics simulation method was used to study the aggregation of Na and Ca salts in different concentrations of Naphthalene-dipeptide (2NapFF) solutions. The results show that high-valence Ca triggers the formation of a gel at a certain dipeptide concentration, and the low-valence Na system follows the aggregation law of general surfactants. The results also show that hydrophobic and electrostatic forces are the main driving forces for the formation of dipeptide aggregates, and that hydrogen bonds do not play a major role in the formation of dipeptide solution aggregates.

Visible-light photoelectrocatalysis/HO synergistic degradation of organic pollutants by a magnetic FeO@SiO@mesoporous TiO catalyst-loaded photoelectrode.

In this paper, we describe a method for photoelectrocatalysis (PEC)/HO synergistic degradation of organic pollutants with a magnetic FeO@SiO@mesoporous TiO (FST) photocatalyst-loaded electrode. At optimal conditions of pH 3.0, 2.

A novel colorimetric and fluorescent probe based on a core-extended perylene tetra-(alkoxycarbonyl) derivative for the selective sensing of fluoride ions.

A novel fluoride (F) colorimetric and fluorescent probe (P1) based on a core-extended perylene tetra-(alkoxycarbonyl) (PTAC) derivative was developed. The probe exhibited high sensitivity and selectivity for distinguishing F from other common anions through significant changes of the UV-Vis and fluorescence spectra. Job's plot analysis revealed that the stoichiometry of the P1-F interaction is 1 : 1.

Hydrothermal synthesis of novel 1-aminoperylene diimide/TiO/MoS composite with enhanced photocatalytic activity.

1-aminoperylene diimide/TiO/MoS composite (NH-PDI/TiO/MoS) with ordered structure was prepared by hydrothermal synthesis method. The composite was characterized by XRD, SEM, FTIR, XPS, BET, DRS, PL, EIS, Raman, photocurrent, and Mott-Schottky plots spectroscopy. The potential positions of the conduction and valence bands, and the band gap energy of the semiconductors were estimated.

Real roles of perylene diimides for improving photocatalytic activity.

Three novel visible-light-driven composite photocatalysts: five-membered O-heterocyclic annulated perylene diimide doped TiO (PDI-1/TiO), 1-phenol-,'-dicyclohexyl perylene-3,4,9,10-tetracarboxylic diimide doped TiO (PDI-2/TiO), and ,'-dicyclohexyl perylene diimide doped TiO (PDI-3/TiO), were synthesized using a hydrothermal synthesis method. The effects of introducing PDIs with different structures into TiO were evaluated by assaying the photodegradation rate of Methylene Blue (MB). The photoactivities of the PDI-1/TiO and PDI-2/TiO catalysts were better than that of PDI-3/TiO.

Colorimetric and ratiometric fluorescent response for anthrax bio-indicator: A combination of rare earth MOF and rhodamine-derived dye.

Bacillus anthracis spores have a unique biomarker of calcium dipicolinate (CaDPA). In this work, we reported a composite nanostructure for the optical sensing of DPA, with Eu (III)-doped metal-organic framework (MOF) as supporting lattice, a rhodamine-derived dye as sensing probe, respectively. By means of XRD, IR, TGA and photophysical analysis, this composite structure was carefully discussed.

Efficient lead ion removal from water by a novel chitosan gel-based sorbent modified with glutamic acid ionic liquid.

Three novel and highly effective AAIL-modified Chitosan (CS) adsorbents are presented. These three new CS-gels were prepared by an innovative synthetic method that uses amino acid ionic liquids (AA-ILs) to cross-link CS with, separately, glutamic acid, aspartic acid and alanine to give novel adsorbents Glu-AA-IL-CS (1), Asp-AA-IL-CS (2) and Ala-AA-IL-CS (3) respectively. The effectively incarcerating host-structures (1) - (3) were characterized by a whole range of techniques including FT-IR, SEM, EDS and XRD.

Self-assembly, optical and electrical properties of perylene diimide dyes bearing unsymmetrical substituents at bay position.

Perylene diimides (PDIs) are one class of the most explored organic fluorescent materials due to their high luminescence efficiency, optoelectronic properties, and ready to form well-tailored supramolecular structures. However, heavy aggregation caused quenching (ACQ) effect in solid state has greatly limited their potential applications. We have easily solved this problem by chemical modification of the PDI core with only phenoxy moietie at one of the bay position.

Novel fluorescent probes for the fluoride anion based on hydroxy-substituted perylene tetra-(alkoxycarbonyl) derivatives.

The fluoride anion (F) sensing abilities of 1-hydroxyl-3,4,9,10-tetra (-butoxyloxycarbonyl) perylene (probe 1) and 1-hydroxyl-mono-five-membered -heterocyclic annulated tetra (-butoxyloxycarbonyl) perylene (probe 2) were studied through visual detection experiments, UV-Vis, fluorescence, and H NMR titrations. The probes were sensitive and selective for distinguishing F from other anions (Cl, Br, I, SO , PF , HPO , BF , ClO , OH, CHCOO, and HPO ) through a change of UV-Vis and fluorescence spectra. The absorption and fluorescence emission properties of the probes arise from the intermolecular proton transfer (IPT) process between a hydrogen atom on the phenolic O position of probe and the F anion.

A water-soluble fluorescent pH probe based on perylene dyes and its application to cell imaging.

A fluorescent pH probe, N,N'-bi( l-phenylalanine amine)-perylene-3,4;9,10-dicarboxylic diimide (PDCDA) was synthesized and used for pH sensing in living cells. A significant fluorescence intensity change was observed over a pH range from 7.0 to 4.