A5086079365- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Electron Spin Resonance Studies
- Crystallography and molecular interactions
- Metal-Organic Frameworks: Synthesis and Applications
- Organic and Molecular Conductors Research
- Porphyrin and Phthalocyanine Chemistry
- Metal-Catalyzed Oxygenation Mechanisms
- Financial Literacy, Pension, Retirement Analysis
- Molecular Junctions and Nanostructures
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- Financial Markets and Investment Strategies
- Nuclear Physics and Applications
- Metal complexes synthesis and properties
- Microfinance and Financial Inclusion
- Housing Market and Economics
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Organoboron and organosilicon chemistry
- Synthesis and Properties of Aromatic Compounds
- Organometallic Complex Synthesis and Catalysis
- Polyoxometalates: Synthesis and Applications
- Graphene research and applications
Indian Institute of Science Bangalore
2020-2025
Chaudhary Devi Lal University
2022
Inspiration Innovation Synergy University
2021
Emory University
2019
Maharishi Markandeshwar University, Mullana
2013
University of Cincinnati
2010
Finding stable analogues of three-dimensional (3D) lead halide perovskites has motivated the exploration an ever-expanding repertoire two-dimensional (2D) counterparts. However, bandgap and exciton binding energy in these 2D systems are generally considerably higher than those 3D due to size dielectric confinement. Such quantum confinements most prominently manifested extreme realization (A)mPbI4 (m = 1 or 2) series compounds with a single inorganic layer repeat unit. Here, we explore new...
Herein we report the synthesis and characterization of anionic boron- carbon-based Kekulé diradicaloids spanned by a p-phenylene bridge. In contrast to Thiele's hydrocarbon, closed-shell singlet system, they show an appreciable population triplet state at room temperature, as evidenced both NMR EPR spectroscopy. Moreover, en route these hetero-diradicaloids, formation isolable diamino(4-diarylboryl-phenyl)methyl radical was observed.
A cyanide-bridged [Fe2Co2] molecular square complex, {[Fe(Tp)(CN)3]2[Co(L)2]2}(BF4)2·2CH3CN·6H2O [1; Tp = hydrotris(pyrazol-1-yl)borate and L bis(1-ethyl-1H-imidazol-2-yl)ketone], has been synthesized characterized fully by single-crystal X-ray diffraction, (photo)magnetic measurements, optical reflectivity, other physical measurements. 1 exhibits a two-step metal-to-metal electron-transfer (MMET)-induced spin transition accompanied thermal hysteresis (T1/2↑ 332 407 K T1/2↓ 320 405 K,...
A 2D coordination polymer, {[Fe(L)2(NCSe)2]·6MeOH·14H2O}n (1; L = 2,5-dipyridylethynylene-3,4-ethylenedioxythiophene), has been synthesized based on a redox active luminescence ligand. 1 possesses [4 × 4] square-grid network where the iron(II) center is in FeN6 octahedral environment. displays reversible thermoinduced high-spin (HS; S 2) to diamagnetic low-spin (LS; 0) ON/OFF spin-state switching with T1/2 value of 150 K. Interestingly, optical reflectivity and photomagnetic studies at 10 K...
For various technological applications involving the design of molecular- and nanoscale devices, spin crossover (SCO) materials are a way forward owing to an ability have readout in form distinct changes physical properties accompanying stimuli-responsive spin-state modifications. In particular, iron-based molecular SCO systems great interest as they shown vast potential functional including sensors electrical, optical, mechanical, spintronic, memory storage, processing devices. Due inherent...
Two π‐radical complexes containing bisazo‐aromatic‐centered radical anion (1•−) were synthesized through in‐situ electron transfer from metal‐to‐ligand using [IrI] and 2‐(2‐Pyridylazo)azobenzene (1) in inert hydrocarbon solvent. These are characterized as diradical [IrIII(1•−)2]+[2]+ monoradical [IrIII(1•−)Cl2(PPh3)] 3. In contrast, a rare metal‐mediated hydrolytic cleavage of the C(sp2)–N bond occurred protic solvent resulting quaternary complex [IrIII(1•−)(1′)(PPh3)]+(4)+. This provides an...
Magnetic materials exhibiting bistability at ambient condition are appealing for application in high-density memory, data storage, sensing and switches devices. Octacyanometallates have been extensively studied as building blocks constructing novel molecular magnetic with exciting physical properties. Here, we designed synthesized two cyanide bridged 2D hexagonal networks using octacyanotungstate(V) block where {[W(CN)8]2[Co(V-im)4]3}n(1) undergoes a single-crystal to (SC-SC) structural...
Molecules exhibiting multifunctional properties, such as magnetic bistability, luminescence, and dielectric properties have excellent potential for application in optoelectronic devices. Research into luminescent magnets switching materials is continuously expanding because, these cases, spin-state change can be expressed by the fluorescence signal, this provide with practical prospects. This review presents recent progress multi-functional spin crossover (SCO) systems, particularly...
In recent world advancement and the quest for smart multi-functional material, stimuli-responsive molecular bistable systems offer unique opportunities to explore their applicability in switches, data storage, sensing technologies. Multi-stimuli responsive stepwise Spin Crossover (SCO) stand tall this area. While effects of external stimuli, particularly thermal variations photoirradiation on magneto-structural properties SCO have been extensively studied, area pressure-modulated spin...
A two-dimensional coordination complex {[Mn(Me-im)3(H2O)][Cr(CN)6]0.5[Mn(EtOH)2]}(1) (Me-im= 1-Methylimidazole) has been synthesized by following the “building-block” strategy from reaction between [Cr(CN)6]3- and Mn(II) with monodentate 1-methylimidazole ligand. The was characterized single-crystal X-ray diffraction analyses, magnetic, gas adsorption spectroscopic studies. Crystal structure analyses reveal that in 2D network is formed, central Cr linked to two Mn centers of different...
A cyanide bridged {4d-3d} heterobimetallic assembly of MoV-FeII with formula {[MoV(CN)8][FeII(v-im)4]2·BF4}n 2DMF·H2O (1·2DMF·H2O) was achieved by the self-assembly [Mo(CN)8]3− and iron(II) monodentate nitrogen donor ligand v-im (v-im = 1-Vinylimidazol). The complex fully characterized single-crystal X-ray diffraction analyses, spectroscopic (photo)magnetic studies. Single crystal analyses revealed that exhibits a three-dimensional (3D) hexagonal network structure molybdenum(V) centers...
Understanding spin dynamics in molecular systems is critical for developing advanced quantum materials, where optimizing structural parameters plays a pivotal role. Although significant progress has been made studying the of β-diketone-Dysprosium(III) complexes with α-diimine bidentate ligands, exploration β-diimine-based ligands to elucidate structure-property relationship remains limited. Here, we report three Dysprosium containing -diimine based [Dy(dbm)3(bik-Et)] (1), [Dy(dbm)3(bik-Me)]...
We report two cyanido-bridged [FeCo] chains, {[FeIII(Tp)(CN)3][CoII(vim)4](BF4)•H2O•CH3CN} (1), {[FeIII(Tp)(CN)3][CoII(vim)4](BF4)•CH3CN} (2), (Tp: trispyrazolylhydroborate, vim: 1-Vinylimidazole) containing diamagnetic [FeIILS(S=0)-CoIIILS(S=0)] units in 2-300 K range. 1 undergoes photo-induced metal-to-metal-electron-transfer under light irradiation at low temperature with thermal relaxation around 80 K, whereas 2 is photo inactive.
The three Co(II) complexes [Co(bbp)2][Co(NCS)4]·4DMF (1), [Co(bbp)(NCS)2(DMF)]·2DMF (2), and [Co(bbp)(NCS)2] (3) have been synthesized characterized by single-crystal X-ray diffraction, magnetic, various spectroscopic techniques. Complexes 1 3 are obtained the reaction of Co(NCS)2 with 2,6-bis(1H-benzo[d]imidazol-2-yl)pyridine (bbp), complex undergoes a structural transformation to form 2. A study revealed that is comprised two centers, cationic octahedral unit an anionic tetrahedral unit,...
A mixed-valence Fe(II)Fe(III) molecular system, {[Fe(pzTp)(CN)3]2[Fe(bik)2]2}·[Fe(pzTp)(CN)3]2·4MeOH (1·4MeOH) (bik = bis-(1-methylimidazolyl)-2-methanone, pzTp tetrakis(pyrazolyl)borate), exhibits single-crystal-to-single-crystal (SC-SC) transformation while increasing the temperature and is converted into {[Fe(pzTp)(CN)3]2[Fe(bik)2]2}·[Fe(pzTp)(CN)3]2 (1). Both complexes exhibit thermo-induced spin-state switching behavior along with reversible SC-SC transformation, where low-temperature...
We present a unique investigation of mononuclear cis-dicyanamido-cobalt(ii) complex, [Co(L)(N(CN)2)2] (1) (L = N,N'-di-tert-butyl-2,11-diaza[3,3](2,6)pyridinophane), which displays reversible thermo-induced HS (S 3/2) to LS 1/2) Spin Crossover (SCO) with T1/2 value around 238 K. The appropriate ligand field strength the CoN6 coordination environment is obtained using tetradentate and two dicyanamide [N(CN)2]- coligands at cis position. Variable temperature XRD several spectroscopic studies...
A series of three new cyanide-bridged [FeCo] molecular square complexes, namely, {[Fe(Tp*)(CN)3]2[Co(L)2]2}(BF4)2·2DMF (L = bik (1), bik* (2), and vbik (3); Tp* hydrotris(3,5-dimethylpyrazol-1-yl)borate, bis(1-methyl-1H-imidazol-2-yl)ketone, bis(1-ethyl-1H-imidazol-2-yl)ketone, bis(1-vinyl-1H-imidazol-2-yl)ketone; DMF dimethylformamide) were synthesized characterized by single-crystal X-ray diffraction analyses magnetic, electrochemical, spectroscopic measurements. Magnetic studies reveal...
The present study reveals that predetermined diverse topology and desired properties can be achieved by strategically designing the ligand it confirms structural magnetic features of cobalt(II) complexes have a significant impact modulation proper utilization coligand. In this work, tactically, two new Pyclen-based macrocyclic N4 ligands been designed to demonstrate effect field on structure properties. Using these ligands, series cobalt complexes, [Co(L1–N4)(μ-NCS)]2·[Co(NCS)4] (1),...
${\mathrm{CuCr}}_{2}{\mathrm{O}}_{4}$, which belongs to the family of ${AB}_{2}{\mathrm{O}}_{4}$ spinels, was recently reported be a type-I multiferroic material. The observations multiferroicity, i.e., where ferroelectricity (FE) arises from structural origin, is rare in spinel family, thus this result significant. role both Jahn-Teller (JT) active ${\mathrm{Cu}}^{2+}$ and Cr sublattice magnetic ordering suggested earlier study, more careful investigation elucidate origin observed FE...
The self-assembly of a macrocyclic tetradentate ligand, cobalt(II) tetrafluoroborate, and nonlinear pseudohalides (dicyanamide tricyanomethanide) has led to two complexes, {[Co(L)(μ1,5-dca)](BF4)·MeOH}n (1) [Co2(L)2(μ1,5-tcm)2](BF4)2 (2) (L = N,N'-di-tert-butyl-2,11-diaza[3,3](2,6)pyridinophane; dca- dicyanamido; tcm- tricyanomethanido). Both complexes were characterized by single-crystal X-ray diffraction, spectroscopic, magnetic, electrochemical studies. Structural analyses revealed that 1...
Following the complex-as-a-ligand strategy, self-assembly of [W(CN)8]3– and iron(II) with bidentate nitrogen donor ligand bik (bik = bis(1-methyl-1H-imidazol-2-yl)ketone) affords a cyanide-bridged [W2Fe2] molecular square complex [HNBu3]2{[W(CN)8]2[Fe(bik)2]2}·6H2O·CH3OH (1). The was characterized by single-crystal X-ray diffraction analyses, (photo)magnetic studies, optical reflectivity, electrochemical spectroscopic studies. Structural analyses revealed that in motif tungsten(V) centers...
Reaction of ethylidene-pyridyl functionalized bisphosphonates with vanadium containing oxo compounds has afforded three different bisphosphonate–polyoxovanadate derivatives, viz., [(VIVO2)(VV2O5)2{O3P-C(O)(CH2-2-C5NH4)-PO3}2]10– (1), [(VIVO2)(VV2O5)2{O3P-C(O)(CH2-3-C5NH4)-PO3}2]10– (2), [(VIVO)3(O){O3P-C(OH)(CH2-4-C5NH4)-PO3}3]8– (3), obtained in aqueous ammonium acetate buffer solutions (pH 4.7). Polyanions 1 and 2 were synthesized by the reaction V2O5 1-hydroxy-2-(2-pyridyl)...