Gui Yin

Cu2O@reduced graphene oxide composite for removal of contaminants from water and supercapacitors

Cu2O@reduced graphene oxide composite displays a good ability to remove dyes from water and high stability in supercapacitors, highlighting potential applications in environmental and energy storage issues.

A colorimetric and ratiometric fluorescent probe for ClO− targeting in mitochondria and its application in vivo

A colorimetric and ratiometric fluorescent probe PMN-TPP for imaging mitochondrial ClO- was prepared. The selectivity of PMN-TPP was excellent and the detection would not be influenced by other ROS. The limit of detection (LOD = 3σ/slope) for ClO- was evaluated to be 0.43 μM, suggesting the probes high sensitivity to ClO-. For the biological applications, PMN-TPP performed well in detecting endogenous HClO in living RAW264.7 macrophage cells. A co-localization study employing Mito Tracker green revealed that PMN-TPP was specifically located in the mitochondria of living RAW264.7 macrophage cells. In the in vivo experiment, a nude mouse with acute inflammation stimulated by lipopolysaccharide (LPS) was employed. After injection of PMN-TPP, the fluorescence signal changed gradually in 30 min and then remained unchanged in the injection region, demonstrating that PMN-TPP could detect the endogenous HClO in living animals.

Spectral behavior of cis-2', 5'-dipyridinylpyrrolidino[3', 4':1,2] [60]fullerene and its coordination complex with Zinc porphyrin (ZnTPP)

Abstract UV–Vis spectra and ESI–MS studies indicated that an axial coordination supramolecule of cis -2 ′ ,5 ′ -dipyridinylpyrrolidino[3 ′ ,4 ′ :1,2][60]fullerene (Compound 1 ) with zinc tetraphenylporphyrin (ZnTPP) was formed. The association constant was determined by Stern–Volmer method (0.94×10 4 ) and Benesi–Hildebrand equation (1.2×10 4 ). The fluorescence emission of ZnTPP in cyclohexane is quenched by compound 1 , which indicates that there has an energy transfer from ZnTPP to C 60 moiety in the title coordination supramolecule.

Phthalocyanine-Sensitized Graphene-CdS Nanocomposites: An Enhanced Photoelectrochemical Immunosensing Platform

A novel strategy is developed for the fabrication of graphene-CdS (G-CdS) nanocomposites by in situ growth of CdS nanoparticles onto simultaneously reduced graphite oxide, which is noncovalently functionalized by sodium 1-pyrene sulfonate through strong π-π stacking interactions. Subsequently, cobalt 2,9,16,23-tetraaminophthalocyanine (CoTAPc) is self-assembled on the G-CdS nanocomposites through electrostatic interactions to produce phthalocyanine-sensitized G-CdS nanocomposites. The photoactive superstructure enhances the photocurrent generation capability, and presents an efficient photoelectrochemical immunosensing platform for the ultrasensitive detection of the prostate-specific antigen (PSA). The quantitative measurement of PSA is based on the decrease in the photocurrent intensity of the phthalocyanine-sensitized G-CdS nanocomposites, which results from an increase in the steric hindrance due to the formation of the immunocomplex. A linear relationship between the photocurrent decrease and the PSA concentration is obtained in the wide range from 1 pgmL(-1) to 5 μgmL(-1) with a detection limit of 0.63 pgmL(-1). The proposed sensor shows high sensitivity, stability, reproducibility, and can become a promising platform for other biomolecular detection.

A highly selective ratiometric fluorescent chemosensor for Ag+ based on a rhodanineacetic acid–pyrene derivative

A highly selective ratiometric fluorescent Ag+ chemosensor RAAP which featured Ag+-induced enhancement of fluorescence emission and blue-shift of the UV-vis spectrum (64 nm) was developed. Both of the changes are due to the Ag+-induced conformational changes from a pyrene monomer to a pyrene excimer and the formation of a crossing configuration. The fluorescence detection limit of Ag+ can reach 1.0 × 10−7 M, which complies with the standards of US EPA and World Health Organization (WHO) for drinking water (5.0 × 10−7 M). RAAP is organic solvent-stable and pH-stable and its spectral response toward Ag+ is found to be reversible.

Crystal structure and magnetic behavior of a three-dimensional cyano-bridged assembly [CuL1]2[Cr(CN)6]ClO4·0.5H2O (L1 = 3,10-dipropyl-1,3,5,8,10,12- hexaazacyclotetradecane)

Reaction of K3[Cr(CN)6] with [CuL1](ClO4)2 (L1=3,10-dipropyl-1,3,5,8,10,12-hexaazacyclotetradecane) leads to a novel three-dimensional (3-D) cyano-bridged bimetallic assembly [CuL1]2[Cr(CN)6]ClO4·0.5H2O (1), in which each hexacyanochromate(III) ion connects four copper(II) ions using four co-planar CN− groups, which coordinate axially to the copper ion in a trans fashion forming trans-CuL1(NC)2 moieties. Magnetic studies reveal that the complex displays a ferromagnetic interaction between the Cu(II) (S=1/2) and Cr(III) (S=3/2) ions through cyano bridges.

Synthesis and structure of a novel infinite triple helices coordination polymer {[Mn(bipy)(azpy)2(NCS)2]·H2O}n(bipy=4,4′-bipyridine, azpy = 4,4′-azobispyridine)

Abstract A novel complex {[Mn(bipy)(azpy)2(NCS)2]·H2O}n (where bipy =4,4′-bipyridine, azpy = 4,4′-azobispyridine) is synthesized and characterized. The molecule structure shows that it is composed of an infinite “rod” with open sidearms. Two-dimensional undulating plane networks with large rhombic channels ca. 21.7×11.6 A is constructed by the neutral rod via hydrogen-bonding interaction. Three parallel interpenetrating two-dimensional (4,4) networks form a novel infinite triple helices with rhombic channels ca. 19×9 A.

Facile synthesis of shape and size tunable porphyrinoid coordination polymers: from copper porphyrin nanoplates to microspindles

Size tunable copper porphyrin dispersed nanoplates, assembled nanoplates, and microspindles have been controllably fabricated by a simple surfactant-assisted solution route.

Self-weaving CNT–LiNbO3 nanoplate–polypyrrole hybrid as a flexible anode for Li-ion batteries

LiNbO3 nanoplates were directly grown on a self-weaving CNT-network, which was then decorated with polypyrrole to form a flexible electrode. This novel nano-structured anode exhibits superior performance, i.e., high rate discharge capacity and excellent cycle performance.

Synthesis and luminescence of CePO4 and CePO4:Tb hollow and core–shell microspheres composed of single-crystal nanorods

Lanthanide phosphate microspheres composed of single-crystal CePO4 and CePO4:Tb nanorods were successfully synthesized, respectively, using the functionalized composite aggregate as a template, which is composed of P123, H6P4O13 and Ce3+, and also as a resource of reaction species with high chemical potential. The shape and the phase structure of the CePO4 nanocrystal can be easily controlled via adjusting reaction temperature, monomer concentration and annealing temperature. SEM images show the spherical superstructure composed of nanorods. HRTEM and SAED images reveal the single-crystalline nature of nanorod and TEM images show the hollow interiors of the superstructure. XRD patterns indicate that the crystal structure of the nanorods is hexagonal before and monoclinic after annealing. The formation mechanism was proposed. Strong UV and green luminescence were observed for the CePO4 and CePO4:Tb microspheres, respectively. The synthesis method can be extended to the fabrication of NRHS and core?shell microspheres of other rare-earth or doped LnPO4 materials for wide applications.