Jingping Zhang

Novel highly selective anion chemosensors based on 2,5-bis(2-hydroxyphenyl)-1,3,4-oxadiazole

2-(2-Hydroxyphenyl)-5-phenyl-1,3,4-oxadiazole 1 and 2,5-bis(2-hydroxyphenyl)-1,3,4-oxadiazole 2 were used as anion fluorescent and colorimetric chemosensors with high selectivity for H2PO4- and F- over Cl-, while 2 can even distinguish H2PO4- from F-

Decametallic CoII-Cluster-Based Microporous Magnetic Framework with a Semirigid Multicoordinating Ligand

We have synthesized a microporous magnetic framework that contained supertetrahedral decametallic cobalt clusters as nodes and 4-(tris(hydroxymethyl)methyl)pyridine ligands as linkers in a NaCl-like network. This complex shows canted antiferromagnetism with spin-glass behavior. After the removal of the guest molecules, the spin-canting and spin-glass behaviors are maintained. The permanent porosity was evaluated by N2-adsorption measurements. This complex mainly shows a hydrophobic nature, as validated by MeOH- and water-adsorption measurements, which is consistent with the grand canonical Monte Carlo (GCMC) theoretical simulation.

X- and H-Shape Two Dimensional Conjugated Oligomers with Anthracene as the Node

X- and H-shape two-dimensional (2D) conjugated oligomers (X- and H-mers) and relevant model compounds have been synthesized through the introduction of different conjugated segments at the 9,10 and 2,6-positions of anthracene, and their properties were studied in detail. Comparing with the model compounds, the X- and H-mers are featured with broader absorption spectra and narrower energy bandgaps. Computational studies on the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) also indicate that these X- and H-mers are 2D conjugated. Solution processed bulk heterojunction (BHJ) solar cells with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as the acceptor material exhibited the power conversion efficiency (PCE) up to 0.53 %.

Transition metal phosphite complexes: from one-dimensional chain, two-dimensional sheet, to three-dimensional architecture with unusual magnetic properties

Four new compounds, [Ni(HPO3)(4,4′-bpy)(H2O)3]·4H2O (1), [Co2(HPO3)2(4,4′-bpy)2(H2O)6]·9H2O (2), [Zn(HPO3)(4,4′-bpy)0.5]·H2O (3), and [Co3(PO3)2(4,4′-bpy)3(H2O)6]·3H2O (4), have been synthesized. Compounds 1 and 2 are linear chains and isostructural except for the distinction of the metal ion and the number of lattice water molecules. Compound 3 consists of a 2D sheet structure. Compound 4 is a 3D magnetic porous material with 1D channels along the c axis. Magnetic measurements indicate that compound 1 shows paramagnetic behavior, while compound 2 displays antiferromagnetic behavior. Compound 4 exhibits antiferromagnetism with a pronounced field-induced spin–flop transition. A critical field of 3 T at 2.0 K is determined from the derivative dM/dH curve. Meanwhile, compound 4 shows a strong spin frustration arising from the geometric frustration in the kagome lattice. The dehydrated phase 4a displays a characteristic of N2 adsorption with type II isotherm. We performed detailed magnetic measurements for 4a, which exhibits quite different magnetic properties from 4. Compound 4a displays a ferrimagnetic behavior with a lower transition field of 0.2 T, and a weaker spin frustration.

Exploration of the slow relaxation behavior in the manganese phosphate network

Our endeavors are devoted to the explanation of the nature of the magnetic relaxation phenomena in the herein prepared [Mn(II)5(HPO4)2(PO4)2(H2O)4]n (1). The behavior investigation indicates the prominence of the half-occupied magnetic centers and the competence of the antiferromagnetic interactions and non-zero magnetic moments. The investigation suggests that the design and synthesis of unusual magnetic center materials with innate unquenched magnetic moments could provide a new route for the production of molecular magnets with magnetic relaxation.