Facile synthesis of upconversion nanoparticles with high purity using lanthanide oleate compounds.

A novel strategy for preparing highly pure NaYF-based upconversion nanoparticles (UCNPs) was developed using lanthanide oleate compounds [Ln(OA)] as the precursor, denoted as the Ln-OA preparation method. Compared to the conventional solvothermal method for synthesizing UCNPs using lanthanide chloride compounds (LnCl) as the precursor (denoted as the Ln-Cl method), the Ln-OA strategy exhibited the merits of high purity, reduced purification process and a uniform size in preparing core and core-shell UCNPs excited by a 980 or 808 nm near infrared (NIR) laser. This work sheds new insight on the preparation of UCNPs and promotes their application in biomedical fields.

[Retrieving Chromophoric Dissolved Organic Matter in Guanting Reservoir Based on in-situ Measured Reflectance Data].

In the present paper, Guanting Reservoir located in Zhangjiakou City, Hebei province and Yanqing District, Beijing, was selected as the study area, and Chromophoric dissolved organic matter (CDOM) content (represented by the CDOM absorption coefficient at 440 nm, aCDOM (440)) was inverted through semi-analytical method and empirical method. The data used in this paper include the spectral data (R (λ)) collected on October 26, 2013 over Guanting Reservoir and aCDOM (λ) measured in the laboratory. A semi-analytical method (QAA-CDOM) was validated and improved accordingly.

Kirenol production in hairy root culture of Siegesbeckea orientalis and its antimicrobial activity.

Background: Despite the excellent anti-inflammatory and anti-rheumatic efficacy associated with kirenol generation, the content of kirenol in Siegesbeckea orientalis is quite low.

Objective: This study was designed to establish a reliable kirenol production protocol by transformed root cultures of S. orientalis and to investigate the antimicrobial activities of kirenol, hairy root, and S.

Topical anti-inflammatory and analgesic activity of kirenol isolated from Siegesbeckia orientalis.

Ethnopharmacological Relevance: Siegesbeckia orientalis has been traditionally used as a topical anti-inflammatory and analgesic agent.

Aims Of The Study: Current study was designed to explore the topical anti-inflammatory and analgesic effects of a constituent isolated from Siegesbeckia orientalis (Compositae), in order to validate its folk use.

Materials And Methods: Kirenol was isolated from ethanolic extract of Siegesbeckia orientalis.

A zinc(II) metal-organic framework based on triazole and dicarboxylate ligands for selective adsorption of hexane isomers.

A three-dimensional (3D) metal-organic framework {[Zn(2)(HBDC)(2)(dmtrz)(2)]·guest}(n) with pcu net has been solvothermally synthesized, which shows selective adsorption of linear and monobranched hexane isomers over a dibranched one.

Systematic exploration of a rutile-type zinc(II)-phosphonocarboxylate open framework: the factors that influence the structure.

To systematically explore the assembly mechanism of a rutile-type open framework of {[Zn(3)(pbdc)(2)]·2H(3)O}(n) (3) (H(4)pbdc = 5-phosphonobenzene-1,3-dicarboxylic acid) constructed by 3-connected pbdc ligands and 6-connected Zn(3)(CO(2))(4)(PO(3))(2) secondary building units (Zn(3)-SBUs), three major factors including solvothermal procedures, types of solvents and amines, are taken into consideration. Seven novel structures, namely {[Zn(5)(pbdc)(2)(OH)(2)(H(2)O)(4)]·4H(2)O}(n) (1), {[Zn(3)(pbdc)(2)·H(2)O]·(Htea)·H(3)O·2-5(H(2)O)}(n) (2), {[Zn(3)(pbdc)(2)](H(3)O)(2)(dma)}(n) (4), {[Zn(2)(pbdc)(taea)]·3H(2)O}(n) (5), {[Zn(3)(pbdc)(2)(Hpda)(2)]·2H(2)O}(n) (6), {[Zn(5)(pbdc)(2)(Hpbdc)(2)]·2H(2)pz·9H(2)O}(n) (7), {[Zn(3)(pbdc)(2)]·Hpd·H(3)O·4H(2)O}(n) (8) are obtained. The results indicate that the layered-solvothermal method and the isopropanol solvent play crucial roles in the construction of the special anionic open framework of [Zn(3)(pbdc)(2)](2-).

A rutile-type porous zinc(II)-phosphonocarboxylate framework: local proton transfer and size-selected catalysis.

The layered-solvothermal synthesis of zinc acetate dihydrate with 5-phosphonobenzene-1,3-dicarboxylic acid yields a three-dimensional rutile-type porous metal-organic framework, which is an anionic open-framework containing local proton transfer with hydrated protons and showing excellent size-selective properties.