Article
Chemistry, Physical
Hadi Kargar, Mehdi Fallah-Mehrjardi, Muhammad Ashfaq, Khurram Shahzad Munawar, Muhammad Nawaz Tahir
Summary: A cis-dioxomolybdenum Schiff base complex has been synthesized and characterized by various spectroscopic methods. The crystal structure of the complex was determined using single crystal X-ray diffraction, revealing a distorted octahedral coordination geometry. The synthesized complex exhibits catalytic potential for the oxidation of sulfides, yielding sulfoxides and sulfones in high yields and short reaction times.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
Mustafa J. Abdelmageed Abualreish, Ahmed Desoky M. Mohamad, Mohamed Shaker S. Adam
Summary: Aryl Schiff base hydrazone can form stable complexes with transition metals, which have various applications in catalysis and biology. Mononuclear pincer complexes of high valent metal ions (MoO22+, UO22+, and VO2+) with aryl Schiff base hydrazone ligand (H2Lhz) were synthesized and characterized. The catalytic potential of these complexes was evaluated in the oxidation of benzyl alcohol, and the inhibitory activity against microbes and cancer cells was examined. The results showed that the complexes displayed high catalytic activity and inhibitory potential, indicating their importance in catalysis and biochemistry.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Chang Zhu, Xiaoxiao Huang, Tingting Li, Qian Wang, Gang Yang
Summary: Research shows that catalytic reduction by alcohols over clay minerals efficiently controls Cr(VI) contamination; high selectivity towards different Cr products can be achieved by considering different active sites and coverage.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Crystallography
Kaiyin Chen, Lauren Bocknek, Bruce Manning
Summary: The study found that naturally occurring Cr(III) will readily oxidize to Cr(VI) when it comes in contact with MnO2, forming a highly mobile and toxic groundwater contaminant.
Article
Crystallography
Tomas Silha, Radovan Herchel, Ivan Nemec
Summary: A series of five novel Mn-salen-based compounds (1a-1c, 2a, 2b) were synthesized through the reaction between precursor chloride complexes and potassium silver/gold dicyanide. The compounds were structurally and magnetically characterized. The findings revealed that the Mn(III) central atoms exhibited axial magnetic anisotropy, and weak magnetic exchange was observed in compounds with a special supramolecular topology involving O-H···O hydrogen-bonded dimers.
Article
Biochemistry & Molecular Biology
Abdelazeem S. Eltaweil, Omar A. Hashem, Hamida Abdel-Hamid, Eman M. Abd El-Monaem, Mohammed Salah Ayoup
Summary: In this study, a novel magnetic organic-inorganic composite was fabricated for the removal of Cr(VI). The composite showed excellent adsorption properties and could be easily recycled for multiple cycles.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Chemistry, Inorganic & Nuclear
R. Selva Kumar, S. K. Ashok Kumar
Summary: A dual-mode chemosensor based on phenanthroline dicarbohydrazide (L) was synthesized for selective and sensitive monitoring of Zr4+. The sensor showed selective distinct colorimetric response and a turn-on fluorescence when interacting with Zr4+ in DMSO:water (8:2, v/v) media. The sensor could form 1:2 stoichiometric complex with Zr4+ and work in a wide pH range of 3 to 8, with a LOD of 180 nM and 9 nM by UV-visible and spectrofluorometric analysis respectively.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Lingmin Sun, Junshu Wu, Jinshu Wang, Meng Xu, Wenyuan Zhou, Yucheng Du, Yongli Li, Hongyi Li
Summary: In this study, the transformation of Ca-containing whewellite into hydroxyapatite nanorods derived from steel slag leaching solution was achieved. Fe(III)-bearing hydroxyapatite was then prepared through cation exchange and showed excellent photoreduction performance on Cr(VI) with the assistance of oxalic acid under visible light irradiation. This work provides a novel strategy for the high-efficient utilization of waste materials in wastewater purification applications.
Article
Environmental Sciences
Yu Li, Lu Wei, Pengfei Zhang, Juan Xiao, Zhiqiang Guo, Qiongyao Fu
Summary: This study compared the bioaccumulation of organic and inorganic chromium in juvenile coral trout, with organic Cr (CrPic) groups generally accumulating the highest Cr content, followed by inorganic Cr (Cr(VI) and Cr(III)) groups.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Chemistry, Physical
Zhifeng Liu, Miao He, Lin Tang, Binbin Shao, Qinghua Liang, Ting Wu, Yuan Pan, Xiansheng Zhang, Songhao Luo, Qingyun He, Lin Ge
Summary: This study prepared Mn and N co-doped biochar (Mn-N-TS) as an effective catalyst to activate peroxymonosulfate (PMS) for ciprofloxacin (CIP) degradation. Mn-N-TS exhibited excellent PMS activation ability, with a CIP removal efficiency of 91.9% in 120 minutes in the Mn-N-TS/PMS system.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Spectroscopy
Qiulan Li, Dezhi Yang, Yaling Yang
Summary: The study developed a novel spectrofluorimetric method based on Cu-CDs for the highly sensitive detection of Cr(VI) and Cr(III) species.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Engineering, Environmental
Ming Ao, Shengsheng Sun, Tenghaobo Deng, Feng Zhang, Ting Liu, Yetao Tang, Jingjing Li, Shizhong Wang, Rongliang Qiu
Summary: Cr(VI) in soils and groundwater is primarily derived from the oxidation of geogenic Cr(III) minerals rather than direct emissions. The oxidation of Cr(III) is mainly facilitated by Mn oxides in anoxic soils and by O-2 in oxic soils. The presence of Mn oxides promotes the oxidative dissolution of chromite even under anoxic conditions. The form of Cr, the abundance of Mn oxides, and the presence of reducing agents control the content of Cr(VI) in soil.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Michel Lannoo, P. Tim Prins, Zeger Hens, Daniel Vanmaekelbergh, Christophe Delerue
Summary: By studying the absorptance spectra of nanometer-thin layers of various semiconductors, researchers have found that the optical absorptance exhibits similar characteristics to graphene, with marked plateaus at integer values of pi alpha. This quantization of absorptance is universal in semiconductor quantum wells, as long as excitonic effects are weak, and is not specific to graphene. The physical origin of this universality is explained using analytical models, which show that the absorptance is ruled by pi alpha independent of the material characteristics.
Article
Chemistry, Inorganic & Nuclear
Bahareh Rezaei Kheirkhah, Tareq M. A. A-Shboul, Felix Edwin Proehl, Sven Krieck, Helmar Goerls, Matthias Westerhausen
Summary: The reactions of [(thf)(2)TiCl4] with sodiated 2,2'-bis[2-hydroxy-3,5-di(tert-butyl)benzylideneamino]-1,1'-biphenyl (1 a) and 2,2'-bis[2-hydroxy-3,5-di(tert-butyl)benzylideneamino]-4,4'-dimethyl-1,1'-biphenyl (1 b) yield the corresponding Ti complexes 2 a and 2 b. Similarly, 1 a reacts with [(thf)(2)ZrCl4] to the corresponding Zr derivative 3. For 2 a, a mixture of cis-beta and trans isomers were observed in solution whereas the Zr congener exclusively forms the cis-alpha form. Quantum chemical calculations verify that these isomers are the preferred molecular structures. The crystal structures of cis-beta isomeric 2 a and cis-alpha isomeric 3 have been determined. Metalation of 1 a with Ti(NMe2)(4) yields 2,2'-bis[(2-oxido-3,5-di(tert-butyl)phenyl)-dimethylaminomethylamino]-1,1'-biphenyl titanium(IV) (4) with a hexadentate ligand.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Biotechnology & Applied Microbiology
Lei Ju, Zhiqiang Jiao, Shiji Ge, Wenhao Zhan, Yidan Liu, Qiang Ren, Qi Liao, Zhihui Yang, Yangyang Wang
Summary: Microbial reduction of Cr(VI) to Cr(III) forms soluble Cr(III) with certain thermal stability and mobility. However, high temperature treatment may reduce the concentration of soluble Cr(III). Higher pH promotes the mobility of soluble Cr(III) but also increases environmental risks.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
