Article
Chemistry, Multidisciplinary
Yanan Ma, Xiaoping Yang, Mengyu Niu, Wenxin Hao, Dongliang Shi, Desmond Schipper
Summary: A Cd-Nd nanowheel was obtained using a flexible Schiff base ligand, which shows high sensitivity and selectivity towards metal cations and nitro-based explosives. The luminescent sensing behavior of the nanowheel is explained by chelation enhancement of the quenching (CHEQ) effect and the high selectivity to TNP is caused by the photoinduced electron transfer process and inner filter effect.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Katerina Skordi, Antonis Anastassiades, Adeline D. Fournet, Rahul Kumar, Michael Schulze, Wolfgang Wernsdorfer, George Christou, Vassilios Nastopoulos, Spyros P. Perlepes, Constantina Papatriantafyllopoulou, Anastasios J. Tasiopoulos
Summary: Simultaneous employment of 1,3-propanediol and di-2-pyridyl ketone in Mn carboxylate chemistry has led to the synthesis of three new, structurally-related [Mn-24] and [Mn-23] clusters, based on nanosized supertetrahedal T4 Mn/O structural cores exhibiting slow relaxation of magnetization below 3.5 K.
CHEMICAL COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Junaid Ali, Mohamad Mosa Mubarak, Calvin Samuel, Hadiya Amin Kantroo, Abbass Malik, Zahoor Ahmad, Viswanathan Baskar
Summary: This study synthesized and screened a series of antimony-containing compounds, which exhibited potential bioactivity against cancer cells and bacteria.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Weiming Huang, Wanmin Chen, Qixia Bai, Zhe Zhang, Min Feng, Zhiping Zheng
Summary: This study demonstrates the rational assembly of high-nuclearity lanthanide hydroxide clusters, which is of great significance for the realization of complex molecular materials and functions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Yuezhou Wei, Khalid A. M. Salih, Mohammed F. Hamza, Toyohisa Fujita, Enrique Rodriguez-Castellon, Eric Guibal
Summary: The development of a new generation of composite sorbents with improved adsorption performance for rare earth elements through phosphorylation, as well as the promising prospects for recovering these strategic metals from mild acidic solutions using this method, have been highlighted.
Article
Chemistry, Multidisciplinary
Thomas Criton, Debora Vilona, Guy Jacob, Maurice Medebielle, Elise Dumont, Lionel Joucla, Emmanuel Lacote
Summary: Polyazanes, higher nuclearity homologues of hydrazines with increasing numbers of bound nitrogen atoms (from 3 to 5), including the first pentazane ever described, were prepared by adding lower-order polyazanes to diazo reagents. A helical conformation of the polynitrogen chains was observed, which persists in solution based on DFT modeling. Despite being reducing agents, polyazanes become less reducing as the number of nitrogens increases.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Li-Juan Liu, Jiang-Wei Zhang, Muhammad Asad, Zhao-Yang Wang, Shuang-Quan Zang, Thomas C. W. Mak
Summary: In this study, a 54-nuclei copper nanocluster, Cu-54, was reported as the largest atom-precise Cu-I/Cu-II mix-valent cluster. The Cu-54 nanoclusters supported by TiO2 showed decent photocatalytic activity for phenol degradation under visible light. This work provides a platform to explore the catalytic behaviors of Cu-I/Cu-II nanosystems.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Xuemei Ma, Jing Jing, Jiayi Yu, Jingbao Wang, Hailin Zhu, Zhiyong Hu
Summary: In this study, an AP-Fe(III) complex was synthesized from apple pectin extracted from apple pomace, characterized, and found to have a Fe content of 24.5%. The complex showed stability and reducibility in acidic conditions, making it a potential novel iron supplement.
Article
Chemistry, Physical
Jun-Song Jia, Yan Cao, Tai-Xue Wu, Ye Tao, Ying-Ming Pan, Fu-Ping Huang, Hai-Tao Tang
Summary: This work developed three high nuclearity {Co-14} cluster catalysts, which successfully achieved highly regio- and stereoselective hydrosilylation of alkynes to produce alpha-vinylsilanes. The catalyst exhibited high regioselectivity, especially for electronically unbiased alkyl alkynes, and leaching tests and reusability proved that the reaction is a heterogeneous process.
Article
Chemistry, Inorganic & Nuclear
Fangcheng Liu, Jiaheng Lin, Jianming Ji, Yong Na, Sayaka Uchida, Xikui Fang
Summary: A coordination macrocycle composed of eight [PМо8O27](-) clusters connected by organic and inorganic compounds is presented. The compound shows high proton conductivity, with imidazolium ions playing a critical role.
INORGANIC CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Sami A. Al-Harbi
Summary: Three carboxamide-based ligands and their iron(III) complexes were synthesized and characterized. The iron(III) complexes exhibited a 1:1 stoichiometric ratio and distorted octahedral geometry. Electrochemical measurements showed the complexes' SOD-like activity with IC50 values of 16.45, 15.24, and 9.70 μM. The iron(III) complexes demonstrated potent anticancer activity with increased safety on normal cells compared to cisplatin. Molecular docking calculations confirmed the experimental findings of the antibacterial and anticancer activities of the complexes and ligands.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Kai Zhang, Shao-Wu Du
Summary: Three new lanthanide-titanium oxo clusters were synthesized by reacting different lanthanide salts with salicylic acid in different solvents. These compounds exhibit strong absorption in the visible light region and fast photocurrent response due to the presence of salicylate ions. Crystallographic studies reveal their unique molecular structures.
INORGANICA CHIMICA ACTA
(2021)
Article
Chemistry, Physical
Jian Gu, Yuxing Xu, Junling Lu
Summary: Supported low-nuclearity cluster catalysts (LNCCs) with atom efficiency and tunable structures offer great potential for advanced catalysis. LNCCs can provide multiple adsorption sites and atom-atom synergies, greatly enhancing catalytic reactivity. The atom-precise synthesis and structural characterization of LNCCs are crucial for optimizing catalytic performance and understanding the structure-activity relationships. Additionally, the article discusses the opportunities and challenges of LNCCs in heterogeneous catalysis.
Article
Chemistry, Multidisciplinary
Jie Tang, Chong Liu, Chenyu Zhu, Keju Sun, He Wang, Wen Yin, Chuting Xu, Yang Li, Weiguo Wang, Li Wang, Renan Wu, Chao Liu, Jiahui Huang
Summary: By controlling the reduction speed, we synthesized a unique copper nanocluster with strong cuprophilic interaction and revealed the key steps in the nucleation process.
Article
Chemistry, Physical
Jian Gu, Yuxing Xu, Junling Lu
Summary: Supported low-nuclearity cluster catalysts (LNCCs) with 2 < n < 10 metal atoms possess high atom efficiency and tunable structures. LNCCs provide multiple adsorption sites and atom-atom synergies, boosting catalytic reactivity. The synthesis and characterization of atom-precise LNCCs are crucial for optimizing catalytic performance and understanding the structure-activity relationship.
Article
Chemistry, Inorganic & Nuclear
Arpan Mondal, Sanjit Konar
Summary: Two mononuclear dysprosium complexes, one with dimethoxydiphenyleborate and the other with NCS and MeOH, were synthesized. Magnetic measurements indicate the presence of field-induced slow relaxation of magnetization in the former complex, while no such phenomenon was observed in the latter complex. The axial anisotropy provided by the larger ligand affects the magnetic properties, indicating the potential for high-performance Dy-based single-ion magnets.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Dibya Jyoti Mondal, Arpan Mondal, Abhik Paul, Sanjit Konar
Summary: In this work, the authors demonstrate the experimental approach of tuning the spin-crossover (SCO) behavior in 2D Hofmann coordination polymers by controlling the spin-state cooperativity. The removal of solvent changes the spin-transition mechanism and enhances the hysteresis width. Structural analysis reveals changes in the crystal system, and the increased ligand-field strength and face-to-face interactions after desolvation are reflected in the highly cooperative SCO.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Sandhya Kapurwan, Arindam Gupta, Arpan Mondal, Sanjit Konar
Summary: In this study, the synthesis, structure, and magnetic properties of three new halo-substituted benzotriazinyl radicals and two metal complexes were reported. The structural analyses revealed isostructural nature of the radicals with differences in interaction with pyridine as the halogen size varied. Magnetic studies showed varying strengths of intermolecular antiferromagnetic exchange interaction among the radicals, with complex 1 exhibiting a strong intramolecular through-bond metal-radical ferromagnetic interaction and complex 2 showing a weak intermolecular through-space radical...radical antiferromagnetic exchange interaction. Broken symmetry (BS)-DFT calculations provided insights into the exchange interaction for all radicals and metal complexes.
Article
Chemistry, Multidisciplinary
Rahul Kumar Sharma, Madhubrata Ghora, Yogendra N. Chouryal, Trisit Ganguly, Debopam Acharjee, Dibya Jyoti Mondal, Sanjit Konar, Sandeep Nigam, Pushpal Ghosh
Summary: Graphene oxide-based nanocomposites formed between lanthanide-doped binary fluorides and graphene oxide (GO) were successfully synthesized using a task-specific ionic liquid as a solvent, templating agent, and reaction partner. The study showed that GO not only controlled the size of the nanocomposites, but also tuned their luminescence properties. Furthermore, the magnetic properties of the nanocomposites were investigated, indicating their potential use in photonic and biophotonic applications including magnetic resonance imaging.
Review
Chemistry, Multidisciplinary
Bhart Kumar, Abhik Paul, Dibya Jyoti Mondal, Piyush Paliwal, Sanjit Konar
Summary: This review provides a concise outline of the design strategy for spin-state switching in spin crossover complexes, as well as their effects on optical and magnetic response. The development of nanoscale architectures is emphasized to bridge the gap between the laboratory and reality.
Article
Chemistry, Multidisciplinary
Dibya Jyoti Mondal, Neelabhro Mukherjee, Sanjit Konar
Summary: Two two-dimensional Hofmann-type coordination frameworks were synthesized to investigate the spin-state switching behavior, using square planar tetracyanometallate building blocks and an amine-functionalized isoquinoline ligand. The amine functional group in the isoquinoline ligand played a key role in exhibiting complete spin crossover behavior under ambient atmospheric pressure. Strong supramolecular interactions between interlayer 2D sheets of {FeII[Pt (CN)4]}n, such as pi stacking and N-H···C interactions, were responsible for the abrupt hysteretic spin transition behavior. Interestingly, external pressure enhanced the stabilization of low spin states, resulting in a one-step abrupt and hysteretic spin transition near room temperature.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Pradip Kumar Sahu, Arpan Mondal, Sanjit Konar
Summary: Tuning the bridging fashion of anilato ligand in dinuclear Dy-III complexes has a significant impact on the slow relaxation of magnetization. The geometry with high order axial symmetry reduces the transverse crystal fields, leading to an increase in energy barrier through the Orbach relaxation process. On the other hand, the geometry with lower symmetry enhances the transverse crystal fields, accelerating the ground state quantum tunneling of magnetization.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Dibya Jyoti Mondal, Arindam Gupta, Sanjit Konar
Summary: In this study, three dinuclear iron(II) helicates with imidazole and pyridine-imine-based ligands were synthesized. The spin-transition behavior of these complexes in the solid state was changed from incomplete, multi-step to complete transition around room temperature by modulating the ligand field strength. The spin transition behavior was also observed in solution phase and correlated using spectroscopy.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Srikanth Balijapelly, Santhoshkumar Sundaramoorthy, Dibya Jyoti Mondal, Sanjit Konar, Nikolay Gerasimchuk, Aleksandr Chernatynskiy, Amitava Choudhury
Summary: A missing member of ternary chalcometallates, NaGaSe2, has been synthesized and its crystal structure has been analyzed. The compound has the ability to absorb water molecules to form hydrated phases, which can undergo reversible structural transformations. The hydrated phase of NaGaSe2 exhibits significantly increased Na ionic conductivity and selective water absorption. The compound also shows the potential for solid-state ion exchange and has a band gap of about 3 eV. The sorption studies confirm its selective water absorption over other solvents.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Dibya Jyoti Mondal, Bhart Kumar, Abhik Paul, Sanjit Konar
Summary: Modulating the spin-crossover behaviour in porous coordination polymers can address the challenges of high-order data storage and processing, and the colour change involved in the process reveals their importance as thermal and optical sensors. The magnetic bi-stability in a Hofmann-type framework can be regulated by changing guest molecules, leading to high thermal hysteresis due to competition between LS and HS states. The study also demonstrates the potential of spin crossover materials for thermal sensing devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Inorganic & Nuclear
S. Athira, Dibya Jyoti Mondal, Shraoshee Shome, Bijoy Dey, Sanjit Konar
Summary: The effect of intermolecular interactions and co-operativity between metal centers on the spin crossover (SCO) of two new Fe(II)-based dinuclear triple helicates has been investigated. It has been found that the complexes exhibit either multistep or abrupt spin transition depending on the conditions, and the presence of anions enhances the cooperativity.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Abhik Paul, Subhasis Das Adhikary, Sandhya Kapurwan, Sanjit Konar
Summary: Artificial photosynthesis is crucial for providing renewable energy resources due to increasing global energy demand and depleting fossil fuels. Constructing an ideal artificial photosynthetic system requires essential components such as photosensitizer, water oxidation catalyst, and CO2 reduction catalyst. Dividing the overall process into two half-reactions and utilizing polyoxometalates (POMs) to reduce activation energy barriers play key roles in enhancing the efficiency of converting solar energy.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Organic
Madan D. Ambhore, Santosh P. Panchal, Arpan Mondal, Sanjit Konar, Venkataramanarao G. Anand
Summary: This study describes two dithienothiophene-based 28 pi antiaromatic macrocycles with benzene and azulene units, and their effects on local and global (anti)aromaticity. Experimental and computational studies confirm the presence of weak paratropic and strong diatropic ring current effects in neutral and dicationic states, respectively.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Review
Materials Science, Multidisciplinary
Abhik Paul, Sanjit Konar
Summary: The rational design of multifunctional molecular components is crucial for the development of materials with practical applications. Electronic pyroelectricity, which generates transient voltage or current based on the temperature-dependent spontaneous polarization induced by electrons, plays an important role in modern sensor and energy conversion devices. Recent studies have shown that dynamic electron transfer processes like valence tautomerism or spin transition can modulate the polarization in a molecular crystal. Two breakthrough studies by Sato and colleagues have demonstrated successful strategies to achieve electronic pyroelectricity at the macroscopic level by combining an electronic redistribution strategy with crystal engineering of molecular orientation. These findings offer a new approach to overcome the challenge of obtaining materials with significant and nearly constant pyroelectric coefficients across a wide temperature range.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Inorganic & Nuclear
Ankit Kumar Srivastava, Arpan Mondal, Sanjit Konar, Samudranil Pal
Summary: The reaction mechanism and product properties of 2,6-diformyl-4-methylphenol, 4-methoxybenzoylhydrazine, and cobalt acetate tetrahydrate in methanol were investigated. The molecular formula and crystal structure of the product were confirmed, and its electrochemical properties and catalytic activity were explored.
DALTON TRANSACTIONS
(2022)
