Article
Chemistry, Inorganic & Nuclear
Zhi-Qiang Shi, Ning-Ning Ji, Xin Zhuo, Chun-Li Zhang, Xiao-Xin Xie, Gang Li
Summary: A highly stable Co(II) complex was synthesized and its proton conductivity in water vapor was investigated. The results showed that the proton conductivity was dependent on temperature and relative humidity. Under high humidity conditions, the complex exhibited good proton conductivity.
INORGANICA CHIMICA ACTA
(2022)
Article
Chemistry, Inorganic & Nuclear
Anik Sahoo, Toushique Ahmed, Sourav Deb, Sujoy Baitalik
Summary: The anion and pH-sensing behaviors of a Ru(II)-bipyridine complex with dissociable protons in its secondary coordination sphere are used to create multiple Boolean and fuzzy logic systems. Changes in anions and pH significantly modulate the absorption, emission, and electrochemical behaviors of the metalloreceptor. The protonation-deprotonation behaviors of the metalloreceptor can be reversed and repeated multiple times, allowing it to demonstrate advanced Boolean functions.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Sirajuddin Sarkar, Sourav Ranjan Ghosh, Paula Brandao, Atish Dipankar Jana
Summary: Crystalline molecular solids are self-assembled entities in which molecular components are packed by various intermolecular forces, with a novel edge-to-edge supramolecular interaction between imidazole molecules playing a crucial role in crystal packing. Additionally, NH·S and CH·S interactions also influence the packing of molecular complexes in the solid state.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Inorganic & Nuclear
Ying Li, Junyang Feng, Luyao Wang, Gang Li
Summary: In recent years, carboxylic acid-based MOFs have gained attention as promising candidates for proton-exchange membranes due to their high stability and excellent proton conductivity. In this study, two MOFs with high water stability were synthesized, and their intrinsic proton conductivity was investigated. The results showed that under specific conditions, the proton conductivities of the MOFs reached promising values. Additionally, the study inferred the principle of proton transfer, providing new inspiration for the design of proton conduction crystalline materials.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
J. K. Nath
Summary: A series of dinuclear metallacycles involving Mn(II), Co(II), Ni(II), Cu(II), and Cd(II) in coordination with 1,8-naphthalene dicarboxylic acid (H2NDC) and co-ligands such as 2,2'-bipyridine (bpy) or solvent molecules were synthesized under reflux conditions. Additionally, a mononuclear Ni(II) complex was synthesized using the same procedure but with NDC, bpy, and pyridine. Two polymorphic structures were obtained, and the single crystal X-ray structures of all the metallacycles were characterized along with Hirshfield surface analysis.
JOURNAL OF STRUCTURAL CHEMISTRY
(2023)
Article
Metallurgy & Metallurgical Engineering
Jing He, Shu-qiong Cao, Yong-ming Chen, Tao Liu, Yun Li, Fang-wen Liao, Jie Dai, Ya-fei Jie
Summary: DZ988N, a chelating extractant, was used to separate copper from a sulfuric acid leaching solution containing Co(II), Fe(II), Cu(II), and Zn(II), and its chelating mechanism was investigated. The optimal extraction conditions were determined to be a DZ988N concentration (v/v) of 25%, pH value of 2.0, extraction temperature of 25 degrees C, time of 6 min, and phase volume ratio (O/A) of 1/1.5. Under these conditions, the single-stage extraction efficiency of Cu(II) was 97.53%, while Fe(II), Co(II), and Zn(II) remained mostly unaffected. A two-stage counter-current extraction was determined to be necessary based on the extraction isotherms diagram. The copper extraction efficiency under the optimal conditions was 99.92% and the stripped rate was 99.2%, with a loss of 0.38%.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Chemistry, Multidisciplinary
Eleonora Afanasenko, Inna Seifullina, Elena Martsinko, Ludmila Konup, Maksym Fizer, Olena Gudzenko, Nataliya Borzova
Summary: In this study, the authors investigated the influence of complex cations on the structure formation, crystal packing, antimicrobial activity, and enzyme activation of isostructural complexes. They found that despite the similarity in composition and structure, the complexes exhibited different levels of antimicrobial activity. The authors also discovered a correlation between the thermodynamic stability of cations and their antimicrobial activity. Additionally, quantum chemical calculations provided insights into the cations-cell membranes interactions and revealed that compounds with specific cations exhibited higher lipophilicity and bioactivity. Furthermore, the study explored the influence of the complexes on the activity of alpha-L-rhamnosidases and identified factors such as the presence of water molecules, hydrogen bond networks, and the formation of active intermediate complex enzyme-effector-substrate that contributed to the activation properties of certain compounds.
Article
Chemistry, Inorganic & Nuclear
Tian Wen-Yu, Chu Jin-Feng
Summary: Three azide bridged complexes were synthesized using different metal ions connecting modes. Additionally, a copper(II) complex was successfully prepared, and all complexes were characterized and analyzed for their properties.
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Eleonora Afanasenko, Inna Seifullina, Elena Martsinko, Viktoriya Dyakonenko, Svitlana Shishkina, Olena Gudzenko, Lyudmila Varbanets
Summary: The article reports the synthesis, structure, and characteristics of novel supramolecular salts with 1,10-phenanthroline 3d-metals cations and similar malatostannate/germanate(IV) anions. These compounds demonstrate efficient enzyme effectors and have unique structural features.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
Yan-Hong Gao, Pei-Pei Huang, Hai-Tao Xu, Pei Huang, Bo Liu, Jiu-Fu Lu, Hong-Guang Ge
Summary: Two novel Zn(II) coordination polymers were synthesized and characterized. They exhibit efficient and universal photocatalytic activity for the degradation of organic dye rhodamine B under visible light irradiation, and also show stronger blue light emission than the H3BCPT ligand.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
Paulo R. S. Salbego, Gustavo H. Weimer, Alexandre R. Meyer, Rafael N. Soek, Ellery R. Garbelini, Fabio S. Nunes, Nilo Zanatta, Helio G. Bonacorso, Manfredo Horner, Marcos A. P. Martins
Summary: The study reports the structural characterization of a new pentacoordinated semicarbazone copper complex and evaluates its formation in comparison to a hexacoordinated complex. It was found that the energies of Cu-ligand bonds in the pentacoordinated cation are redistributed into the existing bonds, leading to minimal changes in total stabilization energy. Additionally, a strong linear correlation was observed between the energies of M-O and M-N bonds in various complexes.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Applied
Safaa El-din H. Etaiw, Elsayed M. Shalaby, Dina M. Abd El-Aziz, Islam Elzeny
Summary: A new supramolecular complex was synthesized through sonochemical method and fully characterized. The complex exhibited efficient heterogeneous catalytic activity for dye removal under UV and ultrasonic radiation at ambient conditions. Significant enhancement in degradation efficiency and time was observed with UV and ultrasonic irradiation.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Analytical
Xiang-Ting Li, Xia Niu, Jin Yang, Wen-Yuan Pei, Jian-Fang Ma
Summary: A complex material based on a thiacalix[4]arene derivative has been successfully synthesized using the solvothermal method. This material, when modified on a glassy carbon electrode, can simultaneously determine the concentrations of Cd2+, Pb2+, and Cu2+ ions with good stability and selectivity. The material also showed satisfactory results when applied to lake water samples.
Article
Chemistry, Physical
Suman Adhikari, Afzal Hussain Sheikh, Sevgi Kansiz, Necmi Dege, Nabajyoti Baildya, Ghodrat Mahmoudi, Nurul Alam Choudhury, Raymond J. Butcher, Werner Kaminsky, Savannah Talledo, Eric M. Lopato, Stefan Bernhard, Julia Klak
Summary: Two supramolecular Co(II)-based coordination compounds were synthesized and characterized. Compound 1 consists of two ([tris (2-aminoethyl) amine Co] 1,1-dicyano-2,2-ethylenedithiolate)+ per thiosulphate ion linked through hydrogen bonds. Compound 2 is stabilized by intramolecular O -H center dot center dot center dot O hydrogen bonds, building ribbons that propagate along the crystals. Both compounds exhibit interesting magnetic and catalytic properties.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Inorganic & Nuclear
Elif Avcu Altiparmak, Sibel Yazar, Namik Ozdemir, Tulay Bal-Demirci, Bahri Ulkuseven
Summary: Copper(II) and nickel(II) mixed ligand complexes synthesized from 4-methoxysalicylaldehyde-N-phenylthiosemicarbazone and 3,5-lutidine were characterized using various techniques, showing antioxidant capacity for both the ligand and its metal complexes.
Article
Geosciences, Multidisciplinary
Xin Chen, Xiaodong Liu, Da-Cheng Lin, Jianjun Wang, Liqi Chen, Pai-Sen Yu, Linmiao Wang, Zhifang Xiong, Min-Te Chen
Summary: The study analyzed organic compounds in sediment core from the Southern Ocean, revealing long-chain n-alkanes potentially transported from Australia and New Zealand. Different carbon chain lengths of n-alkanes came from various sources such as marine phytoplankton, microalgae, terrestrial plants, and chemoautotrophic bacteria. This research highlights the potential use of delta C-13 values of long-chain n-alkanes and U-37(k) index for reconstructing the history of C-3/C-4 plants and sea surface temperature changes in the Southern Ocean.
PROGRESS IN EARTH AND PLANETARY SCIENCE
(2021)
Article
Marine & Freshwater Biology
Fengming Chang, Tiegang Li, Lihua Zhuang, Hanjie Sun, Zhifang Xiong, Rongtao Sun
Summary: This study investigates the sedimentary sequence of the inner shelf of the East China Sea, revealing multiple abrupt rises in deglacial sea level. The results suggest significant environmental changes on the inner shelf during sea-level rise, and the information about sea-level rise is also connected to the weakening of the Asian monsoon.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Oceanography
Peng Zhang, Jian Xu, Sebastian Beil, Ann Holbourn, Wolfgang Kuhnt, Tiegang Li, Zhifang Xiong, Hong Yan, Rui Cui, Heng Liu, Hanning Wu
Summary: The Indonesian Throughflow (ITF) is crucial for regulating the thermohaline balance between the Pacific and Indian Oceans, with variability driven by precessional forcing rather than monsoonal upwelling. The ITF intensity and vertical structure were controlled by Earth's axis wobble, impacting the distribution of solar radiation and influencing the Intertropical Convergence Zone and winds and temperatures over the tropical Pacific Ocean.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Geosciences, Multidisciplinary
Bingbin Qin, Qi Jia, Zhifang Xiong, Tiegang Li, Thomas J. Algeo, Haowen Dang
Summary: Changes in ocean carbon inventory are likely the main factor causing the decline in glacial atmospheric pCO2. By studying the western tropical Pacific, it was found that the size-normalized weight of planktonic foraminifera can be used to estimate the paleo-deep-water CO32- concentration. It was discovered that the deep-water CO32- concentration in this region has changed since approximately 1.4 million years ago, possibly due to a weakening of North Atlantic Deep Water. The glacial and interglacial deep-water CO32- concentrations showed a gradual decline, indicating an increase in DIC content in the deep Pacific.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Fangjian Xu, Bangqi Hu, Jingtao Zhao, Xiting Liu, Kehui Xu, Zhifang Xiong, Feifei Wang, Xue Ding, Qing Li, Jianwei Guo
Summary: This study suggests that deep-sea sediments in the northern South China Sea are mainly derived from southwestern Taiwan Island and are influenced by global climate changes, showing variations in chemical weathering intensities on different geological time scales.
Article
Geography, Physical
Jiangnan Shi, Qi Jia, Dirk Nuernberg, Tiegang Li, Zhifang Xiong, Bingbin Qin
Summary: The tropical Pacific played an important role in global climate change during the Pliocene, with nutricline dynamics playing a significant role in regulating productivity in the western Pacific warm pool.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Chemistry, Physical
Zhifang Xiong, Yun Jiang, Ming Yang, Yan Zhang, Lei Lei
Summary: This study investigates the microstructure and mechanical properties of 7075 aluminum alloy with ultrasonic surface rolling process (USRP) and artificial aging. The results show that a multi-gradient nanostructure (MGNS) layer is formed on the surface of the alloy, leading to improved tensile strength and comparable plasticity. Grain boundary strengthening, precipitation strengthening, dislocation strengthening, and synergistic strengthening contribute to the high strength of the aged-USRP sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Geography, Physical
Xuguang Feng, Fuqing Jiang, Zhaohui Zhang, Zhifang Xiong, Yi Zhong, Jiang Dong, Tianyu Chen, Anchun Li, Xinqing Zou, Xuefa Shi
Summary: This study presents periodic variations in sediment core from the northwestern Philippine Sea, which are linked to Asian dust variations. The study suggests that low-latitude tropical Pacific processes, such as ENSO, may influence Asian dust input into the northwestern Pacific on a 405-kyr cycle during the early Pleistocene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geochemistry & Geophysics
Jiakai Wang, Zheng Tang, David J. Wilson, Fengming Chang, Zhifang Xiong, Dongyong Li, Tiegang Li
Summary: The study provides evidence on the instability of the West Antarctic Ice Sheet throughout the Pleistocene glacial/interglacial cycles and suggests a temporal link with a strengthened Antarctic Circumpolar Current, enhanced deepwater ventilation, and poleward-shifted southern westerly winds. The insights into the role of ocean-atmosphere forcing on the past behavior of the West Antarctic Ice Sheet may enhance our understanding of future changes in this region.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geography, Physical
Zhifang Xiong, Tiegang Li, Barbel Honisch, Thomas J. Algeo, Louisa Bradtmiller, Mark Cane, Carlo Laj, Fujun Wang, Zhengyao Lu, Bingbin Qin, Fengming Chang, Xun Gong
Summary: This study investigates the influence of the East Asian monsoon (EAM) and El Nino-Southern Oscillation (ENSO) on seawater carbonate chemistry in the tropical Pacific. The results show a correlation between the intensity of the East Asian summer monsoon and variations in surface-water carbonate chemistry. Rapid changes in carbonate chemistry are linked to ENSO-like states and the East Asian winter monsoon. These findings suggest that tropical conditions play a crucial role in glacial-interglacial atmospheric CO2 concentration changes.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Zhifang Xiong, Bin Zhai, Thomas J. Algeo, Zhengyao Lu, Tiegang Li, Hanno Meyer, Fuqing Jiang, Peng Zhang, Bingbin Qin, Xun Gong, Zhenyan Wang, Qi Jia
Summary: This study investigated the precipitation changes in the Indo-Pacific Warm Pool (IPWP) during the Last Glacial Maximum (LGM) using a sediment core from the eastern Philippine Sea. The results showed an overall drying trend in the IPWP during the LGM. Comparison with modeling results suggested that extra-tropical factors controlled the precipitation variability in the IPWP during the LGM.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geography, Physical
Yixin Chen, Jian Xu, Jun Liu, Tiegang Li, Zhifang Xiong, Peng Zhang, Hong Yan
Summary: The Indonesian Throughflow (ITF) plays a significant role in global climate and may have contributed to the Northern Hemisphere glaciation. This study investigates the evolution of the ITF intermediate water (ITF-IW) and upper water through sediment analysis.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Qianwei Song, Bingbin Qin, Zheng Tang, Yanguang Liu, Zhihua Chen, Jingteng Guo, Zhifang Xiong, Tiegang Li
Summary: This study utilized an improved method to measure the size-normalized weight of Neogloboquadrina pachyderma (sin.) and found that the calcification of this species is mainly controlled by temperature, which may have a positive impact on atmospheric CO2 levels.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Peng Zhang, Jian Xu, Ann Holbourn, Wolfgang Kuhnt, Zhifang Xiong, Tiegang Li
Summary: Obliquity influences the latitudinal migration of the ITCZ, possibly due to variations in the North Atlantic sea ice cover.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geography, Physical
Jingteng Guo, Xiaohua Qiu, Thomas J. Algeo, Tiegang Li, Zhifang Xiong, Debo Zhao, Haowen Dang, Peijun Qiao, Bingbin Qin, Qi Jia
Summary: This study reconstructed the changes in pH and pCO(2) in the surface waters of the western Pacific Ocean over the past 150,000 years and hypothesized that these changes were driven by the precession cycle of the sun and the influence of the East Asian summer monsoon. Additionally, the study found that the increased upwelling of dissolved inorganic carbon from deep waters sourced from the Southern Ocean also affected the upper water column.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
