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Your search keyword '"Ding-Wa Zhang"' showing total 4 results
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4 results on '"Ding-Wa Zhang"'

1. A Novel Manganese Complex with Mixed Ligands: Preparation, Structure, Photoluminescent and Semiconductive Properties

Author

Ya-Ping Xu, Cai Yi, Ding-Wa Zhang, Yin-Feng Wang, Wen-Tong Chen, and Jian-Gen Huang

Subjects
Photoluminescence, Band gap, chemistry.chemical_element, 02 engineering and technology, General Chemistry, Manganese, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Hydrothermal circulation, 0104 chemical sciences, Bipyridine, chemistry.chemical_compound, Crystallography, chemistry, Imidazole, Diffuse reflection, 0210 nano-technology
Abstract

A manganese complex with mixed ligands, [Mn(2,2′-biim)2(4,4′-bipy)] n[Mn(2,2′-biim)3]2 n6 n(ClO4)•8 nH2O (2,2′-biim = 2,2′-biimidazole; 4,4′-bipy = 4,4′-bipyridine), has been obtained by a hydrothermal procedure and its structure determined by single-crystal X-ray crystallography. A two-dimensional (2-D) supramolecular layer is established through hydrogen-bonding interactions. Solid-state photoluminescence measurement reveals that this complex shows a blue light emission. Solid-state diffuse reflectance determination uncovers the presence of a narrow optical band gap of 2.18 eV in this complex.

Published
2018

2. Synthesis Soluble Non-Ion Transition Metal Manganese(II), Cobalt(II), Nickel(II) Complexes of Diethylenetriamine-N,N′,N″-tri(acetyl-p-hydroxybenzoyl hydrazine)- N,N″- Bisacetic Acid as Potential Contrast Enhancement Agent

Author

Hui-Jiao Zhang, Ding-Wa Zhang, Xue-Li Zhang, Yao-Ting Chen, and Shi-Ni He

Subjects
Ligand, MRI contrast agent, Inorganic chemistry, Hydrazine, chemistry.chemical_element, Manganese, Medicinal chemistry, Inorganic Chemistry, chemistry.chemical_compound, Nickel, Transition metal, chemistry, Diethylenetriamine, Physical and Theoretical Chemistry, Cobalt
Abstract

A novel ligand, diethylenetriamine-N,N′,N″-tri(acetyl-p-hydroxybenzoyl hydrazine)-N,N″-bisacetic acid, and its three soluble non-ion transition metal complexes, ML· nH2O (M = Mn, n = 4; M = Co, Ni,...

Published
2014

3. Synthesis and relaxation properties of two non-ion complexes of gadolinium(III) and manganese(II) with derivatives from diethylene triamine pentaacetic acid and isoniazid

Author

Xue-Li Zhang, Zhilan Lin, Hui-Jiao Zhang, Yao-Ting Chen, Shuni He, and Ding-Wa Zhang

Subjects
Gadolinium, MRI contrast agent, Isoniazid, Relaxation (NMR), Inorganic chemistry, chemistry.chemical_element, Manganese, Diethylene triamine, Ion, Inorganic Chemistry, chemistry, Materials Chemistry, medicine, Physical and Theoretical Chemistry, medicine.drug, Nuclear chemistry
Abstract

In this paper, two novel ligands (H3L1, H2L2) have been synthesized from diethylene triamine pentaacetic acid (DTPA) and isoniazid in different conditions. H3L1 has three carboxylic groups, and H2L2 has two carboxylic groups. Their non-ion complexes of GdL1 and MnL2 holding promise of magnetic resonance imaging (MRI) are synthesized, and relaxivity of complexes are determined, respectively. The relaxivity of GdL1 (R1 = 6.07 L·mmol−1·s−1) and MnL2 (R1 = 6.94 L·mmol−1·s−1) are larger than that of Gd(DTPA)2− (R1 = 4.34 L·mmol− 1·s−1). It is more significative that relaxivity of MnL2 is larger than that of GdL1. The results showed that two non-ion complexes are prospective MRI contrast agents.

Published
2014

4. Synthesis, Characterization and Relaxation Properties of Four Non-ion Transition Metal Manganese(II), Cobalt(II), Nickel(II) and Copper (II) Complexes with Derivatives from Diethylene Triamine Pentaacetic Acid and Isoniazid

Author

Zheng-Yin Yang, Shi-Ping Zhang, Ru-Dong Yang, and Ding-Wa Zhang

Subjects
Chemistry, Ligand, MRI contrast agent, Inorganic chemistry, Metals and Alloys, Molar conductivity, chemistry.chemical_element, Manganese, Inorganic Chemistry, chemistry.chemical_compound, Nickel, Transition metal, Materials Chemistry, Cobalt, Organometallic chemistry, Nuclear chemistry
Abstract

A novel ligand (H2L), diethylenetriamine-N,N′,N′′-triacetylisoniazide N,N′′-bisacetic acid, and its four non-ion transition metal complexes, ML · nH2O (M = Mn, n = 4; M = Co, Ni, n = 2; M = Cu, n = 1), have been synthesized and characterized on the basis of elemental analysis, molar conductivity, 1H-NMR, FAB-MS, TG-DTA analysis and IR spectrum. In addition, relaxivity (R1) of the complexes was determined, the relaxivity of MnL, CoL, NiL, CuL as well as Gd(DTPA)2− used as a control are 6.94, 2.79, 2.52, 1.59 and 4.34 l mmol−1 s−1, respectively. The relaxivity of MnL is larger than that of Gd(DTPA)2−. The results show that the complex of MnL may be a potential MRI contrast agent.

Published
2006

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