Arunendu Mondal

• Central Institute of Technology Kokrajhar

Supercapacitors have emerged today as a compelling choice in the realm of renewable and clean energy storage. They possess several outstanding features such as high-power density, quick charging/discharging, long-cycle life, safety, and environment friendliness. These features make them an attractive option for a wide range of applications, includi...

Over the years, scientists were consistently searching for novel oxide materials that can be employed in optoelectronic and spintronic devices. In this work, we have explored the structural, optical and transport features of Sn0.94Ag0.06−ySbyO2 (0 ≤ y ≤ 0.06) compounds for their potential use in optoelectronics devices. The measurement and analyses...

Researchers have been consistently looking for new materials that can be integrated in optoelectronic and spintronic devices. In this research, we investigated the crystalline structure, Raman, and optical characteristics of Mg-doped SnO2 compounds. The solid-state reaction technique was utilized to produce polycrystalline samples of Sn1-xMgxO2 (0...

The Na-doped TiO2 compounds, i.e Ti1−xNaxO20≤x≤0.12 were synthesized via the solid-state synthesis method. The formation of single rutile phase with tetragonal structure was identified through the structural study by recording the XRD patterns. The analyses of the XRD patterns further indicate that Na⁺ ions are likely being substituted at the inter...

Agriculture is the highest employment generating sector and the economical backbone of India. Due to the climate change soil erosion is a major concern in this sector. Protecting erosion in vegetated flow land or on the emergent/submerged river bed have been investigated through laboratory experiment. Experimental findings reveal a remarkable obser...

Researchers have been making persistent efforts in recent years to find novel and suitable oxide materials with room temperature d⁰ ferromagnetic characteristics to be utilized in spintronics devices. The fundamental goal of this work is to investigate the effect of K/Mg co-doping on the structural, magnetic, optical, and transport (dielectric and...

String matching is a common problem in the field of computer science, and it is a common operation in various language processing tasks. Several efficient algorithms have been developed for string matching problems like Knuth-Morris-Pratt (KMP) algorithm [1], Rabin-Karp’s algorithm [2], matching using a finite-state machine, etc. But in natural lan...

The present work emphases on the structural, elemental, magnetic, optical, and electrical transport properties of Zn1-xKxO (0 ≤ x ≤ 0.12) compounds for their plausible application in spintronic devices. These compounds have been crystallized in a single phase and formed with spherical particles of size 3–6 μm. At 300 K, the M − H curve reveals that...

The investigation of the multifaceted properties of (BiFeO3)0.6(CaTiO3)0.4, synthesized following a solid solution reaction mechanism is reported. The temperature-dependent dielectric and tanδ loss analysis sheds light on the temperature-dependent phase transitions. The structural deformation from the rhombohedral structure for pure BFO to the orth...

Investigation on change in flow characteristics in an open channel flow is important to understand the flowing water ecosystem, which is important in various aspects like sediment deposition and water quality. A significant number of field and laboratory experiments have been carried out to characterize different types of flows in an open channel....

In recent years, non-magnetic elements-doped oxide materials have been projected as one of the promising materials for application in optoelectronics and spintronics. The primary goal of this research is to look into the influence of Ag on the structural, optical, and dielectric properties of ZnO compounds. The solid-state route method was used to...

Of late, d0 ferromagnetic oxide materials have been studied as potential material for spintronics application. We investigate the crystal structure, magnetic, optical, and dielectric properties of Ag-doped TiO2 compounds. XRD study reveals polycrystalline rutile form of TiO2 with tetragonal-type structure. SEM micrographs show spherical particles o...

d⁰ ferromagnetic oxide materials have emerged as a promising material for possible application in spintronics. The recent theoretical calculation has predicted d⁰ ferromagnetism in Ag-doped SnO2 compounds. In this work, we have undertaken an investigation into structural, micro-structural, optical, magnetic, and electrical properties of Ag doped Sn...

The coronavirus disease 2019 (COVID-19) pandemic is the most rapidly evolving global emergency since March 2020 and one of the most exercised topics in all aspects of the world. So far there are numerous articles that have been published related to COVID-19 in various disciplines of science and social context. Since from the very beginning, researc...

To control the spread of COVID-19, around the world, many countries imposed lockdowns. Numerous studies were reported on COVID-19 in different disciplines with various aspects. The doubling time is a mathematical technique to estimate the current rate of spread of the disease. Researchers used the doubling technique to address the COVID-19 pandemic...

Outbreak of COVID-19, created a disastrous situation in more than 200 countries around the world. Thus the prediction of the future trend of the disease in different countries can be useful for managing the outbreak. Several data driven works have been done for the prediction of COVID-19 cases and these data uses features of past data for future pr...

Polyaniline in its emeraldine salt form was obtained by chemical oxidative polymerization of aniline monomer. PANi thus obtained was mixed with tantalum pentoxide (Ta <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3...

Mononuclear zinc complexes of a family of pyridylmethylamide ligands abbreviated as HL, HLPh, HLMe3, HLPh3, and MeLSMe [HL=N-(2-pyridylmethyl)acetamide; HLPh=2-phenyl-N-(2-pyridylmethyl)acetamide; HLMe3=2,2-dimethyl-N-(2-pyridylmethyl)propionamide; HLPh3=2,2,2-triphenyl-N-(2-pyridylmethyl)acetamide; MeLSMe=N-methyl-2-methylsulfanyl-N-pyridin-2-ylme...

The self-assembly of supramolecular copper "tennis balls" that possess unusual magnetic properties using a small pyridyl amide ligand is described. Copper(II) complexes of N-(2-pyridylmethyl)acetamide (HL) were synthesized in methanol. In the absence of base, the mononuclear complex [Cu(HL)(2)](ClO(4))(2) (1) was prepared. The structure of 1, deter...

Triazacyclononane (TACN) was coupled to glycine (L(Gly)), alanine (L(Ala)), and phenylalanine (L(Phe)) via standard solution phase peptide coupling techniques. Copper(II) complexes of these new ligand-amino acid conjugates, [(CuL(Gly))(2)](ClO(4))(4) (1), [(CuL(Ala))(2)Cl](ClO(4))(3) (2), and [Cu(2)L(Phe)Cl(4)] (3), were synthesized and characteriz...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

Small rhombihexahedra and small cubicuboctahedra (see picture), namely faceted polyhedra, form the basis of two novel low-density framework solids that are afforded by the self-assembly of molecular squares only or molecular squares and triangles, respectively.

A series of bowls separated by hour-glass-shaped channels characterizes the structure of the undulating two-dimensional coordination polymer (see picture) that is prepared from a nanoscale secondary building unit (nSBU), which is formed by four square metal(II)carboxylate SBUs that have 1,3-benzenedicarboxylate units as 120° spacers.

Schüsseln, getrennt durch sanduhrförmige Kanäle – so könnte man die hier gezeigte Struktur eines zweidimensionalen Koordinationspolymers charakterisieren. Dieses wurde aus Nanomaßstab-Sekundärbaueinheiten (nSBUs) aufgebaut, die aus vier quadratischen Metall(II)-Carboxylat-SBUs mit Isophthalateinheiten als 120°-Spacer bestehen.

Kleine Rhombenhexaeder und Kubikuboktaeder (siehe Bild) – solche facettierten Polyeder bilden die Basis zweier neuartiger Gerüststrukturen mit niedriger Dichte, die durch Selbstorganisation allein aus molekularen Quadraten bzw. molekularen Quadraten und Dreiecken entstehen.

Self-assembly of molecular polygons by linking their vertices provides nanosized faceted polyhedra that are porous, contain chemically accessible sites on their facets, are chemically robust, neutral and soluble in common laboratory solvents.

The preparation and crystal structures of [Cu(1,3-bdc)(py)3].1 H2O (1), [Cu(1,3-bdc)(py)3].H2O.CH3OH (2), [Co(1,3-bdc)(py)3(H2O)] (3), [Co(1,3-bdc)(py)3(CH3OH)].H2O (4), [Cu(1,3-bdc)(py)2] (5), [Co(1,3-bdc)(CH3OH)4] (6) and [Ni(1,3-bdc)(CH3OH)4] (7) are described (1,3-bdc=1,3-benzenedicarboxylic acid; py=pyridine). 1–4 form straight-chain 1-D coord...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...

[NiL(SeCN)2(H2O)] [L=bis(3-aminopropyl)amine (dpt), (1), (2-aminoethyl)(3-aminopropyl)amine (aepn), (2) and bis(2-aminoethyl)methylamine) (medien), (3)] have been synthesized and characterized in the solid state by X-ray single crystal analysis (1 and 2), IR, electronic spectra and magnetic measurement. Structure analyses of (1) and (2) reveal that...

The complexes [NiL3](NO2)2·2H2O (violet, 1) and cis-[NiL2(NO2)2]·0.5H2O (pink, 1b) (L=1,2-diamino-2-methylpropane) have been synthesized from solution. The X-ray single crystal structure analysis of compound 1b has been carried out, but the presence of a water molecule cannot be detected. Upon heating, complex 1b undergoes dehydration followed by a...

The title complex, poly­[bis­[N-(2-amino­ethyl)-N-methyl-1,2-ethane­di­amine]­hexa-μ-thio­cyanato-tricadmium(II) monohydrate], [Cd3(NCS)6(medien)2]n·nH2O [medien is N,N-bis(2-amino­ethyl)­methyl­amine, C5H16N3], adopts a three-dimensional inorganic polymeric network structure. Two cadmium centres (Cd1 and Cd2) are linked to each other via thio­cyan...

The compounds {[M(4,4′-bipy)2(NO3)2]·x arene}n (M = Ni, 1; Co, 2; x = 2 for arene = chlorobenzene, o-dichlorobenzene, benzene, nitrobenzene or toluene; x = 3 for arene = anisole) have been prepared and their crystal structures determined. All compounds represent rare examples of interpenetrating planar networks that are chemically different. It app...

[NiL2](NO3)2 (1) and [NiL2](CF3CO2)2 (2) (L = N2-methyldiethylenetriamine] have been synthesized and their X-ray single crystal structures have been determined. The triamines are ligated to NiII s-facially in (1) and meridionally in (2), with a NiN6 chromophore in each complex.

The structure of bis[N,N-bis(3-aminopropyl)methylamine]-1 kappa(3)N,2 kappa(3)N-di-mu-thiocyanato-1:2 kappa(2)N:S;1:2 kappa(2)S:N-dithiocyanato-1 kappa N,2 kappa N-dinickel(II), [Ni-2(NCS)(4)(C7H19N3)(2)] or [Ni-2(mu-SCN)(2)(medpt)(2)(NCS)(2)], where medpt is bis(3-aminopropyl)methylamine, consists of two crystallographically independent dimer type...

[NiL2]X2·nH2O (where L is bis(2-aminoethyl)methylamine, and n=0 when X is Cl−, Br−, SCN− and CF3COO−, n=3 when X is 0.5SO42− and 0.5SeO42−) and NiLX2·nH2O (n=0 when X is Cl−, Br−, NO3−, n=1 when X is CF3COO− and n=3 when X is 0.5SO42− and 0.5SeO42−) have been synthesized and investigated thermally in the solid state. All the bis, as well as monotri...

The complex [Cd3(dien)2(NCS)6]n·nH2O (dien = diethylenetriamine) is prepared and characterised by X-ray diffraction studies, which show a new type of three-dimensional polymeric structure having cadmium centres which are linked to each other via NCS bridges in such a way that two types of Cd environment (one involving only N-donor atoms and the oth...

[NiL2]C4O4·nH2O [where n=2 when L=diethylenetriamine(dien) and N-(3-aminopropyl)-1,3-propanediamine (dpt); n=3 when L=N-(2-aminoethyl)-1,3-propanediamine (aepn); n=0 when L=N2-methyldiethylenetriamine (medien)] and Ni(tmdien)C4O4·2H2O (where tmdien=1,4,7 trimethyl-diethylenetriamine) have been synthesised and investigated thermally in the solid sta...

The linkage isomers trans-bis[1-(2-aminoethyl)piperidine]dinitronickel(II) (brown) 1 and trans-bis[1-(2-aminoethyl)piperidine]dinitritonickel(II) (blue) 2 have been synthesized and characterised by X-ray single crystal structure analysis.

[Cd(medien)m]X2 · nH2O [where medien is bis(2-aminoethyl)methylamine, m=2 and n=0 when X is Cl- (1), Br- (2), I- (3), NCS- (4) and NO3- (5); m=1 and n=0 when X is Cl- (1a), Br- (2a) and I- (3a); m=2 and n=3 when X is 0.5SO42- (6) and 0.5SeO42- (7); m=1 and n=1 when X is 0.5SO42- (6a) and 0.5SeO42- (7a)] have been synthesized from solution and inves...

Crystal structure analysis of Cd(aepn)(NCS)2 [aepn=(2-aminoethyl)(3-aminopropyl)amine] reveals that each cadmium(II) possesses distorted octahedral geometry and is linked to four different nearest cadmium centres via thiocyanate groups and non-chelated arms of the triamine ligands forming a chain linked system of a hyperbranched polymeric molecule.

Molecular geometry and coordination number play the key role in exploring the chemistry of a coordination compound. Cadmium(II) usually possesses octahedral as well as tetrahedral geometry.(1) Pentacoordination in cadmium(II) is also described.(1,2) However, heptacoordinate cadmium(II) complexes are not common,(3-10) and most of them are examples o...

Single crystal structure of [Zn2(dpt)2(μ-OH)](ClO4)3 (dpt = bis(3-aminopropyl) amine) shows that two units of Zn(dpt) are bridged by oxygen atom of the hydroxo group. Each Zn-atom possesses distorted tetrahedral geometry. Analogous complexes [Zn2L2(μ-OH)](ClO4)3 [L = bis(3-aminopropyl) methylamine(medpt), bis(2-aminoethyl)methylamine(medien)] have...

The structure of [Ni(medien)(NCS)(mu-SCN)](n) [medien is N-(2-aminoethyl)-N-methyl-1,2-ethanediamine, C5H15N3] is a polymeric chain with each pair of neighbouring nickel(II) ions linked by one SCN-bridging ligand. The coordination polyhedron about the Ni-II atom is a distorted octahedron consisting of three N atoms of the medien ligand coordinating...

[Ni2(dien)2(NCS)4(H2O)] (1) and [Ni(aepn)(NCS)2]n (2) (where dien = bis(2-aminoethyl)amine and aepn = N-(2-aminoethyl)-1,3-propanediamine) have been synthesised from solution. Single crystal X-ray structure analyses of 1 and 2 reveal that the metal atoms in both the complexes display distorted octahedral geometry with the triamine coordinating faci...

[Cd(aepn)2]X2·nH2O (where aepn is N-(2-aminoethyl)-1,3-propanediamine, and n = 1 when X is Cl− and Br−, n = 0 when X is 0.5SO2−4, 0.5SeO2−4, NO−3 and I−), Cd(aepn)X2 (where X is Cl−, Br−, I−, 0.5SeO2−4, 0.5SO2−4 and SCN−), and Cd(dpt)X2·nH2O (where dpt is N-(3-aminopropyl)-1,3-propanediamine, and n = 1 when X is 0.5SO2−4 and 0.5SeO2−4, n = 0 when X...