Cerium(III) Phosphinate and Cerium(IV) Phosphostibonate Acting as Catalysts for Mild, Selective Sulfoxidation Calvin Samuel, Tokala Navaneetha, Junaid Ali, Viswanathan Baskar Inorganic Chemistry, 2025 A Ce(III) phosphinate and a Ce(IV) phosphostibonate have been assembled by the reaction of a phosphinic acid and phosphostibonate with Ce(III) salts. Single crystal X-ray diffraction (SCXRD) studies reveal the formation of a rare triangular Ce(III) oxo-cluster [CeIII3(Ph3CHPO2)]6Cl3(CH3OH)(H2O)8] (1) and a fascinating hexanuclear oxo-cluster containing Ce(IV) ions [CeIV6 (p-ClC6H4SbV)4(μ4-O)4(μ3-O)4(t-BuPO3)8(μ2-OCH3)8] (2). The molecular architecture of 2 showcased an interesting correlation with platonic solids, wherein the Ce(IV), Sb(V), and P(V) ions were found to be present in vertices of an octahedron, a tetrahedron, and a cube, respectively. Under mild conditions, 1 and 2 exhibited the capability to act as catalysts for sulfoxidation in the presence of hydrogen peroxide, with 1 acting as a homogeneous catalyst and 2 acting as a heterogeneous catalyst. Both 1 and 2 showed high conversion for various substrates, with 1 showing moderate selectivity while 2 showcased high selectivity. Moreover 1 and 2 catalyzed the oxidation of 2-chloroethyl ethyl sulfide (CEES) to nontoxic 2-chloroethyl ethyl sulfoxide (CEESO) with high selectivity.
Silver-π Interaction: A Diverse Approach to Hybrid Material and Its Efficacy in Electrocatalytic Reduction of Nitrate to Ammonia Calvin Samuel, Gujju Narsimhulu, Garima Bangar, Sai Hemanth Kumar Dasari, Gopalan Rajaraman, Viswanathan Baskar Inorganic Chemistry, 2024 Inspired by the intriguing nature of the metal-π interaction in organometallic chemistry, a novel 1D hybrid material has been designed. Herein, a functionalized tellurium allyl macrocycle (TAM) acts as a molecular building block and is knit together via silver-π interaction to obtain Ag-TAM. Ag is coordinated to two allyl groups and a phenyl ring in η 2 mode. Instead of the conventional polymerization strategy, a metal-π interaction is employed to interlink macrocycles. TAM and Ag-TAM showed electrocatalytic capability for the conversion of nitrate to ammonia. Ag-TAM showed an NH 3 yield rate 2-fold greater than TAM with a high faradaic efficiency of 94.6% with good durability, proving that interlinking of macrocycles via metal-π interaction improves the catalytic activity. Detailed periodic density functional theory (DFT) calculations unveil novel mechanistic insights, suggesting cooperative catalysis between neighboring Ag sites and contributing to the enhanced efficiency.
Cerium (III) Phosphinate and Cerium (IV) Phosphostibonate Acting as Catalysts for Mild, Selective Sulfoxidation C Samuel, T Navaneetha, J Ali, V Baskar Inorganic Chemistry 64 (2), 872-881 , 2025 2025.0 Citations: 2
Functionalized organotellurium macrocycles: tuning their optical bandgap and investigation of their catalytic activity C Samuel, V Pramod, A Steiner, V Baskar Dalton Transactions 54 (14), 5747-5752 , 2025 2025.0 Citations: 2
Silver-π Interaction: A Diverse Approach to Hybrid Material and Its Efficacy in Electrocatalytic Reduction of Nitrate to Ammonia C Samuel, G Narsimhulu, G Bangar, SH Kumar Dasari, G Rajaraman, ... Inorganic Chemistry 63 (45), 21670-21678 , 2024 2024.0 Citations: 7
Aza-donor ligands—A key to synthesizing mononuclear to coordination polymers of cadmium phosphinates S Mondal, C Samuel, V Baskar Journal of Molecular Structure 1273, 134274 , 2023 2023.0 Citations: 1
Electrocatalytic hydrogen evolution mediated by an organotelluroxane macrocycle stabilized through secondary interactions G Narsimhulu, C Samuel, S Palani, SHK Dasari, K Krishnamoorthy, ... Dalton Transactions 52 (46), 17242-17248 , 2023 2023.0 Citations: 2
Tunable bandgaps in self-assembled transition metal-incorporated heterometallic M 2 Sb 4 (M= V, Mn, Co, Ni, and Cu) oxo clusters T Navaneetha, U Ugandhar, C Samuel, T Guizouarn, F Pointillart, ... Dalton Transactions 52 (27), 9328-9336 , 2023 2023.0 Citations: 3
Stibonic acids and related stibonate-phosphonate clusters: Synthesis, characterization and bioactivity evaluation J Ali, MM Mubarak, C Samuel, HA Kantroo, A Malik, Z Ahmad, V Baskar Journal of Inorganic Biochemistry 235, 111909 , 2022 2022.0 Citations: 7
Stibonic Acids/Stibonate-Phosphonate Clusters: Synthesis, Characterization and Bioactivity Evaluation Z Ahmad, J Ali, C Samuel, MM Mubarak, HA Kantroo, MA Malik
MOST CITED SCHOLAR PUBLICATIONS
Silver-π Interaction: A Diverse Approach to Hybrid Material and Its Efficacy in Electrocatalytic Reduction of Nitrate to Ammonia C Samuel, G Narsimhulu, G Bangar, SH Kumar Dasari, G Rajaraman, ... Inorganic Chemistry 63 (45), 21670-21678 , 2024 2024.0 Citations: 7
Stibonic acids and related stibonate-phosphonate clusters: Synthesis, characterization and bioactivity evaluation J Ali, MM Mubarak, C Samuel, HA Kantroo, A Malik, Z Ahmad, V Baskar Journal of Inorganic Biochemistry 235, 111909 , 2022 2022.0 Citations: 7
Tunable bandgaps in self-assembled transition metal-incorporated heterometallic M 2 Sb 4 (M= V, Mn, Co, Ni, and Cu) oxo clusters T Navaneetha, U Ugandhar, C Samuel, T Guizouarn, F Pointillart, ... Dalton Transactions 52 (27), 9328-9336 , 2023 2023.0 Citations: 3
Cerium (III) Phosphinate and Cerium (IV) Phosphostibonate Acting as Catalysts for Mild, Selective Sulfoxidation C Samuel, T Navaneetha, J Ali, V Baskar Inorganic Chemistry 64 (2), 872-881 , 2025 2025.0 Citations: 2
Functionalized organotellurium macrocycles: tuning their optical bandgap and investigation of their catalytic activity C Samuel, V Pramod, A Steiner, V Baskar Dalton Transactions 54 (14), 5747-5752 , 2025 2025.0 Citations: 2
Electrocatalytic hydrogen evolution mediated by an organotelluroxane macrocycle stabilized through secondary interactions G Narsimhulu, C Samuel, S Palani, SHK Dasari, K Krishnamoorthy, ... Dalton Transactions 52 (46), 17242-17248 , 2023 2023.0 Citations: 2
Aza-donor ligands—A key to synthesizing mononuclear to coordination polymers of cadmium phosphinates S Mondal, C Samuel, V Baskar Journal of Molecular Structure 1273, 134274 , 2023 2023.0 Citations: 1
Stibonic Acids/Stibonate-Phosphonate Clusters: Synthesis, Characterization and Bioactivity Evaluation Z Ahmad, J Ali, C Samuel, MM Mubarak, HA Kantroo, MA Malik
