A5102954923- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal complexes synthesis and properties
- Crystallography and molecular interactions
- Organometallic Complex Synthesis and Catalysis
- Energetic Materials and Combustion
- Thermal and Kinetic Analysis
- Synthesis of Organic Compounds
- Stochastic processes and financial applications
- Synthesis and Reactions of Organic Compounds
- Genetic and phenotypic traits in livestock
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Economic theories and models
- Livestock Management and Performance Improvement
- Synthesis of heterocyclic compounds
- Magnetism in coordination complexes
- Phenothiazines and Benzothiazines Synthesis and Activities
- Advanced Control Systems Optimization
- Lanthanide and Transition Metal Complexes
- Effects of Environmental Stressors on Livestock
- Milk Quality and Mastitis in Dairy Cows
- Chemical synthesis and alkaloids
- Organometallic Compounds Synthesis and Characterization
- Stability and Controllability of Differential Equations
- Ferrocene Chemistry and Applications
High Energy Materials Research Laboratory
2008-2024
University of Kalyani
2003-2023
National Dairy Research Institute
2018-2021
Indian Institute of Science Bangalore
1994-2003
University of Burdwan
1994
The relative stability of metastable phases RDX, HMX and CL-20 in solution has been revealed by experimental DFT studies. Molecular conformation during prenucleation clustering lattice barrier essentially determines the crystallization.
A new preparation method for CL-20/HMX (2:1) cocrystal has been established at the laboratory level that is amenable scale up. Solvent evaporation from a saturated solution of stoichiometric mixture in presence high boiling antisolvent, comparatively very efficient and cheaper method, yielded pure cocrystals. Cocrystals were well characterized by spectroscopic, thermoanalytical tools, X-ray diffraction, microscopic techniques. correlation percentage formation with rate obtained through...
This article presents evidence of a possible route to the formation ε- and α-polymorphic phases 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20) studied through CL-20 solution using reverse normal precipitation method. Reverse with instant addition facilitated opportunity track crystal from their immediate end phase stabilization. Precipitation under apparent conditions achieve α- or ε-phases showed initial occurrence metastable β-phase subsequent transformation intended...
The present day weapon technology demands novel energetic materials that exhibit simultaneous high explosive yield and reduced sensitivity. This article demonstrates application of spray evaporation to prepare sensitive co-crystals performance nitramine explosives like HMX CL-20 with a relatively less insensitive 1,1-diamino-2,2-dinitroethylene or FOX-7. Stronger intermolecular hydrogen bonding in FOX-7 is responsible for limited solubility most organic solvents. Large differences restricts...
An acid recrystallization process for synthesis of ultrafine TATB (UF-TATB) median particle size < 5 µm is described. The uses production grade (PG-TATB) > 50 µm. PG-TATB made soluble in DMSO-alkali. Acidification this basic solution done with dilute aqueous nitric acid, which causes precipitation UF-TATB through a reaction crystallization process. simple, economical, and easy to scale up. effect various parameters such as concentration neutralization time on studied discussed. characterized...
This study reports the suitability of nitrogen-rich compounds for gun-propellant formulations in regard to flame temperature and burning-rate characteristics. Nine different [guanidinium nitrate, triaminoguanidinium azide, guanidinium azotetrazolate, hydrazinium 3, 3’-azobis (6-amino-1, 2, 4, 5-tetrazine), 6-dihydrazino-1, 5tetrazine, guanidinium-5-aminotetrazolate] have been studied on basis gas-phase thermal analysis investigate decomposition pathways. The mechanism as elucidated each...
e-CL-20 is prepared from raw CL-20 by solvent evaporation and precipitation methods. Experiments were also done using coupled with in-situ ultrasonication method. Using method, scaled up to 500 g batch. Raw was assigned α-CL-20. The chemical polymorphic purity of found be about 98 per cent > 95 cent, respectively. obtained agglomeration free well defined geometry in comparison its crystal morphology dominantly bi-pyramidal or lozenge shapes. mean particle size method without methods 30 μm -...
Abstract Hydrazinium nitroformate (HNF), an energetic and eco‐friendly oxidizer, was desensitized successfully by changing its crystal size shape coating with a nanocomposite. During crystallization, various methods were tried out which include mechanical stirring, ultrasound using modifiers (CSMs). Experimental results showed that the multi‐pronged approach to control of crystals careful choice CSMs crystallization method worked well counter preferential axial growth, thus shifting long...
The synthesis and structural characterization of the hitherto unreported multiply bonded paramagnetic dirhenium(<sc>iii</sc>,<sc>ii</sc>) nitrobenzoate complexes have been reported.
Stochastic control problems for controlled Markov processes models with an infinite planning horizon are considered, under some non-standard cost criteria. The classical discounted and average criteria can be viewed as complementary, in the sense that former captures short-time latter long-time performance of system. Thus, we study a criterion obtained weighted combinations these criteria, extending to general state space framework several recent results by Feinberg Shwartz, Krass et al. In...
A number of hitherto unreported thieno[2,3-b]quinolin-4(9H)-ones 5a-f have been regioselectively synthesized from the corresponding 4-(prop-2-ynyloxy)quinolin-2(1H)-thiones 4a-f. The 4-(Prop-2-ynyloxy)quinolin-2(1H)-thiones 4a-f were prepared by thionation 4-(prop-2-ynyloxy)quinolin-2(1H)-ones 3a-f. latter compounds in turn alkylation 4-hydroxyquinolin-2(1H)-one (1).
The heterogeneous phase reaction of [Ru(η2-RL)(PPh3)2(CO)Cl] (1) with the sodium salts dimethyl dithiocarbamate (MeDTC), diethyl (EtDTC), and pyrrolidine (PyrDTC) ligands led to isolation bright-yellow crystalline solids type [Ru(η1-RL)(PPh3)2(CO)(R′DTC)] (2(R)(R′DTC)) where η2-RL is C6H2O-2-CHNHC6H4R(p)-3-Me-5, η1-RL C6H2OH-2-CHNC6H4R(p)-3-Me-5, R Me, OMe, Cl, R′ = Et, Pyr. binding ligand accompanied by dissociation Ru-O Ru-Cl bonds along concomitant prototropic shift from iminium–phenolato...