Guest-host frameworks of the anionic metal complex [Fe(ox) 3] 3- and cationic bipyridinium-based linkers bonded by charge-assisted hydrogen bonds M. Jaya Prakash, Allen G. Oliver, Slavi C. Sevov Crystal Growth and Design, 2012 Reported is the synthesis and characterization of guest-free and guest-included frameworks assembled from the anionic metal complex [Fe(ox)3]3- and the cationic diprotonated 4,4′-bipyridinium2+ (H2bpy) or 1,2-bis(4-pyridinium)ethylene2+ (H2bpye) linkers, where the complex and linkers are bonded by multiple charge-assisted hydrogen bonds. In some of the compounds additional barium cations serve as bridges between the anionic metal complexes forming −{[Fe(ox)33-]2[Ba2+]}∞– anionic infinite chains. Aromatic guest molecules of 4-methoxyphenol (mp), 1,6-dimethoxynaphtalene (dmn), and 1,5-dihydroxynaphthalene (dhn) were successfully incorporated in the cavities of the frameworks. The π–π interactions between the pillars and the guests in the resulting guest-included frameworks were confirmed spectroscopically. The magnetic properties of the frameworks were measured as well.
Hydrogen-bonded inclusion compounds with reversed polarity: Anionic metal-complexes and cationic organic linkers M. Jaya Prakash, Slavi C. Sevov Inorganic Chemistry, 2011 Synthesized and structurally characterized is a new series of soft-host frameworks assembled by charge-assisted hydrogen bonds between an anionic metal complex (MC) and cationic organic linkers (OL), specifically [Co(en)(ox)(2)](-) and diprotonated 4,4'-bipyridinium (H(2)bpy) or 1,2-bis(4-pyridinium)ethylene (H(2)bpye). While frameworks built of cationic complexes and anionic organic linkers are already well-known, the seven new compounds described here represent the first series of frameworks with reversed polarity, that is, made of anionic complexes and cationic organic linkers. The compounds have a general formula [OL][MC](2)·n(guest), where the guest molecules 4,4'-biphenol (bp), 4-methoxyphenol (mp), 1,4-dimethoxybenzene (dmb), 1,6-dimethoxynaphtalene (dmn), and 4-nitroanisole (na). Structurally the compounds can be described as pillared-layer frameworks with layers constructed of MC anions and linked together by hydrogen-bonded cationic OL pillars. The guest molecules occupy the galleries between the pillars while their steric, electronic, and π-π and hydrogen-bonding capabilities influence the overall structure of the soft frameworks.
Edge-directed [(M2)2L4] tetragonal metal-organic polyhedra decorated using a square paddle-wheel secondary building unit M. Jaya Prakash, Minhak Oh, Xinfang Liu, Kwi Nam Han, Gi Hun Seong, et al. Chemical Communications, 2010 A general strategy was developed for edge-directed self-assembly of tetragonal metal-organic polyhedra (MOPs) having a C(4) symmetry Cu(II)(2)(COO)(4) paddle-wheel as a secondary building unit, using C(2) symmetric dicarboxylic ligands as pincer-type primary building units.
Metal - Organic polyhedron based on a CuII paddle-wheel secondary building unit at the truncated octahedron corners M. Jaya Prakash, Yang Zou, Seunghee Hong, Mira Park, Minh-Phuong Ngoc Bui, et al. Inorganic Chemistry, 2009 A metal-organic polyhedron of truncated octahedral geometry augmented with a C(4)-symmetric square-planar Cu(II) paddle-wheel node as a secondary building unit can be prepared using a C(3)-symmetric ligand that occupies the face of the octahedral cage, where the three phenyl groups containing a m-carboxylate group in the ligand provide the necessary curvature to form the finite octahedral cage.
Metal-organic macrocycles, metal-organic polyhedra and metal-organic frameworks M. Jaya Prakash, Myoung Soo Lah Chemical Communications, 2009 Metal-organic macrocycles (MOMs), metal-organic polyhedra (MOPs) and metal-organic frameworks (MOFs) are metal-organic systems (MOSs) developed from appropriately designed ligands and selected metal ions. Metalladiazamacrocycles, a class of MOMs, are finite 2D MOSs formed from tricationic hexacoordinate metal ions and ditopic bridging ligands, N-acylsalicylhydrazide, containing diaza residues, where the size and shape of the systems have been modulated by controlling the steric repulsions between the ligands. The 2D MOM systems could be expanded to 3D MOP systems by self-assembling C(3) symmetric components and C(4) symmetric components to octahedral MOPs. By substituting some replaceable solvent sites of MOMs or MOPs, MOFs based on MOMs or MOPs as SBBs have been constructed, where the properties of the SBBs have been directly transferred to the MOF systems.
Growing molecular crystals on inorganic crystals: Polar structure induced by noncentrosymmetric templates M. Jayaâ Prakash, Pallepogu Raghavaiah, Y.â S.â R. Krishna, T.â P. Radhakrishnan Angewandte Chemie International Edition, 2008 Like promotes like: The templating effect of inorganic crystals is exploited to promote the growth of the polar structure of a molecular crystal of a dipolar zinc(II) complex (see picture). It is likely that the polar nature of the noncentrosymmetric template crystal lattice, and its associated electrostatic field, facilitates the oriented assembly of the dipolar molecules.
C2-symmetric Bis(amide) molecules: Solid-state assembly, thermal stability, and second harmonic generation S. Philip Anthony†, M. Jaya Prakash, T. P. Radhakrishnan Molecular Crystals and Liquid Crystals, 2007 Chiral C2-symmetric bis(amide) molecules, N,N′-bis(4-fluorobenzoyl)-(1R,2R)-diaminocyclohexane (BFBDC), N,N′-bis(4-nitrobenzoyl)-(1R,2R)-diaminocyclohexane (BNBDC), N,N′-bis(4-methoxybenzoyl)-(1R,2R)-diaminocyclohexane (BMBDC), and N,N′-bis(4-aminobenzoyl)-(1R,2R)-diaminocyclohexane (BABDC) are synthesized, and their assembly patterns in the solid state are investigated through single-crystal X-ray analysis. A range of noncovalent interactions give rise to helical superstructures in the crystals. The compounds exhibit good optical transparency and high thermal stability; these may be attributed to the specific molecular structure and extended supramolecular interactions. BMBDC and BABDC molecules possess the largest hyperpolarizabilities in the series owing to the presence of electron-donating groups and exhibit second harmonic generation (SHG) in the solid state. The optical transparency, thermal stability, and SHG capability make these materials potentially interesting candidates for quadratic nonlinear optical applications.
SHG active crystals of a remote functionalized achiral NLO-phore assembled through zinc(II) complexation M. Jaya Prakash, T. P. Radhakrishnan Inorganic Chemistry, 2006 An achiral nonlinear optical chromophore with a "remote functionality" that can act as a ligand is developed on the basis of 4-nitroaniline derivatized with pyridine. The molecules are assembled through complexation with simple achiral zinc(II) salts and the H-bond network mediated by the counterions, to generate noncentrosymmetric materials exhibiting optical second harmonic generation (SHG). The crystal structures of the new complexes are determined; the counterion strongly influences the ligand orientations and lattice structure. SHG of the microcrystalline materials is investigated. Correlation between the structure and SHG is rationalized using semiempirical quantum chemical estimation of the hyperpolarizabilities of molecules and molecular clusters. The metal complexation plays a significant role in molecular assembly but affects the SHG very little, enabling simplified analysis of the bulk property in terms of molecular responses. Organization of remote functionalized molecules by metal ion complexation thus offers a convenient approach to the rational design of quadratic NLO materials.
Second harmonic generation from a homologous series of molecular crystals: Impact of supramolecular interactions M. Jaya Prakash, T. P. Radhakrishnan Chemistry of Materials, 2006 Optical second harmonic generation (SHG) from molecular crystals is largely controlled by the molecular hyperpolarizability and the relative disposition of the molecules in the crystal lattice. Even though it is known that intermolecular interactions can modify the bulk SHG, strong and direct influence of such effects in crystals has not been widely demonstrated. We present a new family of crystals based on the achiral remote functionalized nonlinear optical (NLO) chromophore, N-(2-aminoethyl)-4-nitroaniline, combined with a homologous series of carboxylic acids, in which the overwhelming impact of supramolecular interactions on the solid-state SHG is clearly manifested. Crystallographic investigations reveal a systematic variation in the superstructure formation of the NLO-phore unit across the series, and the intensities of the SHG from microcrystalline samples are found to correlate with the assembly pattern. Failure of simple additive models in explaining the SHG trend is analyzed using quantum chemic...
Fluorescent Tri (biphenyl‐4‐yl) Amine‐Derived Molecule for Sensing of Chloromethanes, and Picric Acid, Breaking of J‐Type Aggregates and White Light‐Emitting Diode Investigations A Tirkey, K Singh, NP Gouda, M Dehury, J Ghosh, M Sarkar, JP Madda Chemistry–An Asian Journal 21 (6), e70706 , 2026 2026
Host–Guest Hydrogen-Bonded Inclusion Frameworks Made of [Fe (ox) 3] 3–Anionic Nodes and Tri-pyridyl-triazinium Cationic Linkers MJ Prakash, AG Oliver, SC Sevov Journal of Chemical Crystallography 56 (1), 11 , 2026 2026
Fluorescence Enhancement in a Tri (biphenyl‐4‐yl) amine Derivative via Solid‐State Grinding with Metal Salts: Chemosensing and White Light‐Emitting Diode Applications AK Mahto, J Ghosh, P Pradhan, M Sarkar, S Vaidyanathan, R Ramanan, ... ChemPhotoChem 9 (6), e202500021 , 2025 2025 Citations: 4
A Fluorescent Covalent Organic Cage for Ultrafast Detection of Picric Acid and HCl Vapor Sensing AK Mahto, S Barik, M Sarkar, JP Madda Chemistry–An Asian Journal 20 (3), e202400912 , 2025 2025 Citations: 6
Synthesis and optical properties of a LiCaY (MoO 4) 3: Eu 3+ red phosphor with negligible concentration quenching for highly efficient white LED and plant growth applications P Sharma, JP Madda, S Vaidyanathan Dalton Transactions 54 (39), 14868-14881 , 2025 2025 Citations: 6
Breaking of J-aggregates in fluorescent covalent organic cage molecular materials through solid state grinding with metal salts: Chemo-sensing and light-emitting diode applications AK Mahto, S Barik, A Mandal, P Pradhan, M Sarkar, JP Madda ACS Applied Optical Materials 2 (3), 394-404 , 2024 2024 Citations: 6
Solid-state fluorescence enhancement in the covalent organic cage material through simple grinding with metal salts: chemo-sensing and white-light-emitting diode applications. AK Mahto, JP Madda 2024
Enhancement of Fluorescence Emission Intensity in a Sulfonyl Hydrazide Derivative of Tri (biphenyl‐4‐yl) amine via Solid‐state Grinding with Various Metal Salts: Combined … AK Mahto, Kuldeep, S Barik, RK Gajula, M Sarkar, MJ Prakash ChemistrySelect 8 (30), e202301601 , 2023 2023 Citations: 4
Fluorescence Emission Enhancement with Metal Salts in the Solid-state via Dipole-ion Interactions AK Mahto, M Jaya Prakash 2023
Narrow-band dazzling red-emitting (LiCaLa (MoO 4) 3: Eu 3+) phosphor with scheelite structure for hybrid white LEDs and LiCaLa (MoO 4) 3: Sm 3+, Eu 3+-based deep-red LEDs for … P Sharma, JP Madda, S Vaidyanathan Dalton Transactions 52 (41), 15043-15056 , 2023 2023 Citations: 30
Zero Concentration Quenching LiCaLa (MoO4) 3: Eu3+ Red Phosphors with Scheelite structure for white LEDs P Sharma, P Pradhan, JP Madda, S Vaidyanathan 2022
An imine linked fluorescent covalent organic cage: the sensing of chloroform vapour and metal ions, and the detection of nitroaromatics RK Gajula, S Mohanty, M Chakraborty, M Sarkar, MJ Prakash New Journal of Chemistry 45 (10), 4810-4822 , 2021 2021 Citations: 19
Imine‐Linked Covalent Organic Cage Porous Crystals for CO 2 Adsorption RK Gajula, R Kishor, MJ Prakash ChemistrySelect 4 (43), 12547-12555 , 2019 2019 Citations: 16
Design, synthesis, biological and in silico evaluation of coumarin-hydrazone derivatives as tubulin targeted antiproliferative agents P Govindaiah, N Dumala, I Mattan, P Grover, MJ Prakash Bioorganic chemistry 91, 103143 , 2019 2019 Citations: 63
Design, Synthesis and Pharmacological Evaluation of 4‐Hydroxycoumarin Derivatives as Antiproliferative Agents. G Pilli, N Dumala, JS Sreeja, R John, S Sengupta, P Grover, J Prakash M ChemistrySelect 4 (36), 10805-10809 , 2019 2019 Citations: 8
Synthesis and biological evaluation of novel 4, 7-dihydroxycoumarin derivatives as anticancer agents P Govindaiah, N Dumala, P Grover, MJ Prakash Bioorganic & Medicinal Chemistry Letters 29 (14), 1819-1824 , 2019 2019 Citations: 31
Influence of intramolecular interactions on carbon dioxide gas adsorption capacity in Mesoporous Imine polymers JP Madda, P Govindaiah, SK Jena, S Krishna, R Kishor ChemRxiv 2018 (0126) , 2018 2018
Guest–Host Frameworks of the Anionic Metal Complex [Fe(ox) 3 ] 3- and Cationic Bipyridinium-Based Linkers Bonded by Charge-Assisted Hydrogen Bonds MJ Prakash, AG Oliver, SC Sevov Crystal Growth & Design 12 (5), 2684-2690 , 2012 2012 Citations: 15
Edge-directed [(M 2) 2 L 4] tetragonal metal–organic polyhedra decorated using a square paddle-wheel secondary building unit MJ Prakash, M Oh, X Liu, KN Han, GH Seong, MS Lah Chemical Communications 46 (12), 2049-2051 , 2010 2010 Citations: 67
MOST CITED SCHOLAR PUBLICATIONS
Metal–organic macrocycles, metal–organic polyhedra and metal–organic frameworks MJ Prakash, MS Lah Chemical communications, 3326-3341 , 2009 2009 Citations: 82
Metal−Organic Polyhedron Based on a Cu II Paddle-Wheel Secondary Building Unit at the Truncated Octahedron Corners MJ Prakash, Y Zou, S Hong, M Park, MPN Bui, GH Seong, MS Lah Inorganic chemistry 48 (4), 1281-1283 , 2009 2009 Citations: 68
Edge-directed [(M 2) 2 L 4] tetragonal metal–organic polyhedra decorated using a square paddle-wheel secondary building unit MJ Prakash, M Oh, X Liu, KN Han, GH Seong, MS Lah Chemical Communications 46 (12), 2049-2051 , 2010 2010 Citations: 67
SHG Active Salts of 4-Nitrophenolate with H-Bonded Helical Formations: Structure-Directing Role of ortho -Aminopyridines MJ Prakash, TP Radhakrishnan Crystal Growth & Design 5 (2), 721-725 , 2005 2005 Citations: 64
Design, synthesis, biological and in silico evaluation of coumarin-hydrazone derivatives as tubulin targeted antiproliferative agents P Govindaiah, N Dumala, I Mattan, P Grover, MJ Prakash Bioorganic chemistry 91, 103143 , 2019 2019 Citations: 63
Synthesis and biological evaluation of novel 4, 7-dihydroxycoumarin derivatives as anticancer agents P Govindaiah, N Dumala, P Grover, MJ Prakash Bioorganic & Medicinal Chemistry Letters 29 (14), 1819-1824 , 2019 2019 Citations: 31
Narrow-band dazzling red-emitting (LiCaLa (MoO 4) 3: Eu 3+) phosphor with scheelite structure for hybrid white LEDs and LiCaLa (MoO 4) 3: Sm 3+, Eu 3+-based deep-red LEDs for … P Sharma, JP Madda, S Vaidyanathan Dalton Transactions 52 (41), 15043-15056 , 2023 2023 Citations: 30
Second harmonic generation from a homologous series of molecular crystals: impact of supramolecular interactions MJ Prakash, TP Radhakrishnan Chemistry of materials 18 (13), 2943-2949 , 2006 2006 Citations: 29
SHG active crystals of a remote functionalized achiral NLO-phore assembled through zinc (II) complexation MJ Prakash, TP Radhakrishnan Inorganic chemistry 45 (24), 9758-9764 , 2006 2006 Citations: 23
An imine linked fluorescent covalent organic cage: the sensing of chloroform vapour and metal ions, and the detection of nitroaromatics RK Gajula, S Mohanty, M Chakraborty, M Sarkar, MJ Prakash New Journal of Chemistry 45 (10), 4810-4822 , 2021 2021 Citations: 19
Imine‐Linked Covalent Organic Cage Porous Crystals for CO 2 Adsorption RK Gajula, R Kishor, MJ Prakash ChemistrySelect 4 (43), 12547-12555 , 2019 2019 Citations: 16
Guest–Host Frameworks of the Anionic Metal Complex [Fe(ox) 3 ] 3- and Cationic Bipyridinium-Based Linkers Bonded by Charge-Assisted Hydrogen Bonds MJ Prakash, AG Oliver, SC Sevov Crystal Growth & Design 12 (5), 2684-2690 , 2012 2012 Citations: 15
Growing molecular crystals on inorganic crystals: Polar structure induced by noncentrosymmetric templates M Jaya Prakash, P Raghavaiah, YSR Krishna, TP Radhakrishnan Angewandte Chemie 120 (21), 4033-4036 , 2008 2008 Citations: 14
Remote functionalized nonlinear optical chromophore: Optimal assembly in crystals for second harmonic generation MJ Prakash, TP Radhakrishnan Crystal growth & design 5 (5), 1831-1836 , 2005 2005 Citations: 13
Design, Synthesis and Pharmacological Evaluation of 4‐Hydroxycoumarin Derivatives as Antiproliferative Agents. G Pilli, N Dumala, JS Sreeja, R John, S Sengupta, P Grover, J Prakash M ChemistrySelect 4 (36), 10805-10809 , 2019 2019 Citations: 8
A Fluorescent Covalent Organic Cage for Ultrafast Detection of Picric Acid and HCl Vapor Sensing AK Mahto, S Barik, M Sarkar, JP Madda Chemistry–An Asian Journal 20 (3), e202400912 , 2025 2025 Citations: 6
Synthesis and optical properties of a LiCaY (MoO 4) 3: Eu 3+ red phosphor with negligible concentration quenching for highly efficient white LED and plant growth applications P Sharma, JP Madda, S Vaidyanathan Dalton Transactions 54 (39), 14868-14881 , 2025 2025 Citations: 6
Breaking of J-aggregates in fluorescent covalent organic cage molecular materials through solid state grinding with metal salts: Chemo-sensing and light-emitting diode applications AK Mahto, S Barik, A Mandal, P Pradhan, M Sarkar, JP Madda ACS Applied Optical Materials 2 (3), 394-404 , 2024 2024 Citations: 6
C 2 -Symmetric Bis(amide) Molecules: Solid-State Assembly, Thermal Stability, and Second Harmonic Generation SP Anthony, MJ Prakash, TP Radhakrishnan Molecular Crystals and Liquid Crystals 473 (1), 67-85 , 2007 2007 Citations: 6
