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1. Non-stoichiometric carbamazepine cocrystal hydrates of 3,4-/3,5-dihydroxybenzoic acids: coformer–water exchange

Author

Trishna Rajbongshi, Kashyap Kumar Sarmah, Susobhan Das, Poonam Deka, Arijit Saha, Binoy K. Saha, Horst Puschmann, C. Malla Reddy, and Ranjit Thakuria

Subjects
Materials Chemistry, Metals and Alloys, Ceramics and Composites, General Chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract

A unique set of carbamazepine (CBZ) non-stoichiometric cocrystal hydrates with 34/35DHBA have been synthesized which are facilitated by their isostructural nature with the CBZ dihydrate, resulting in coformer–water exchange (molecular alloy).

Published
2023

3. List of contributors

Author

Abdul-Salam Jahanfo Abdulai, Sangita Agarwal, Nufile Uddin Ahmed, Waqas Ali, Ingrid R.F.S. Alves, Charu Arora, Michael Osei Asibey, Taniya Banerjee, Isabelli D. Bassin, João Paulo Bassin, Shelly Bhardwaj, Dipti Bharti, Muhammad Bilal, Amilton Barbosa Botelho Júnior, Syed Mohsin Bukhari, Francine Duarte Castro, Manisha Chandel, Nalini Singh Chauhan, Moharana Choudhury, Ankita Chowdhury, Laura Cutaia, Peter Dabnichki, Soumendra Darbar, Sujit Das, Tanushri Das, Shailja Dhiman, Ananya Dutta, Denise Espinosa, Luíza Santana Franca, Neanderson Galvão, Imania Ghaffar, Tania Ghatak, Arti Goel, Juhi Gupta, Marlia M. Hanafiah, Sumi Handique, Md. Sanowar Hossain, Ali Hussain, Haikal Ismail, Arti Jain, Arshad Javid, Benjamin Dosu Jnr, Jaskiran Kaur, Shilpi Khurana, Deeksha Krishna, Amit Kumar, Roopa Kumari, Tanu Kumari, Smitha M.S., Sophayo Mahongnao, Himadrija Majumder, Priti Malhotra, Ana Paula Martinho, Mahadi Hasan Masud, Bisma Meer, Kushif Meer, Tahir Mehmood, Syed Ghulam Mohayud Din Hashmi, Monjur Mourshed, Fareeha Nadeem, Ammu P. Nair, Sarita Nanda, Asha Patel, Deepak Pathania, Abhay Punia, Sarmad Ahmad Qamar, Akhilesh Singh Raghubanshi, Trishna Rajbongshi, Sanchayita Rajkhowa, Anita Rani, H.K. Sachan, Piu Saha, Srimoyee Saha, null Sangeeta, Abhijit Sarkar, Jyotirmoy Sarma, Ajay Sharma, Nilakshi Dhara Sharma, Pooja Sharma, Anand Narain Singh, Darshan Singh, Rahul Singh, Ravindra Pratap Singh, Siril Singh, Sanju Soni, Sahana Sultana, Jorge Tenório, Manita Thakur, Prosper Tornyeviadzi, Mentore Vaccari, Ajit Varma, Kailas L. Wasewar, Bárbara Gomes Xavier, Carlos Xavier, Elisa Silvana Xavier, and Rajni Yadav

Published
2023

4. Mechanosynthesis of Eutectics of Anti‐Inflammatory Drug Ethenzamide – A Comparison with Analogous Cocrystals

Author

Trishna Rajbongshi, Suryanarayan Cherukuvada, Mihails Arhangelskis, Ranjit Thakuria, Ramesh Ganduri, and Kashyap Kumar Sarmah

Subjects
Drug, medicine.drug_class, Chemistry, media_common.quotation_subject, Ethenzamide, General Medicine, Cocrystal, Combinatorial chemistry, Anti-inflammatory, Mechanochemistry, medicine, Mechanosynthesis, media_common, medicine.drug
Published
2021

5. Preparation of Pyrazinamide Eutectics versus Cocrystals Based on Supramolecular Synthon Variations

Author

Suryanarayan Cherukuvada, Ankita Sarkar, Ranjit Thakuria, Tejender S. Thakur, Kashyap Kumar Sarmah, Ramesh Ganduri, and Trishna Rajbongshi

Subjects
Synthon, Supramolecular chemistry, 02 engineering and technology, General Chemistry, Crystal structure, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Cocrystal, Cinnamic acid, 0104 chemical sciences, chemistry.chemical_compound, Crystallography, chemistry, Functional group, General Materials Science, 0210 nano-technology, Benzoic acid, Eutectic system
Abstract

Cocrystallization of the antituberculosis drug pyrazinamide (PZA) with several substituted aromatic carboxylic acids as coformers was studied. The combinations were analyzed by X-ray diffraction and melting behavior to assess the formation of eutectic versus cocrystal. Benzoic acid, cinnamic acid, and N-heterocycle coformers gave eutectics, whereas the majority of their hydroxyl/methoxy substitutes formed cocrystals with PZA. X-ray crystal structures were obtained for some cocrystals, and binary phase diagrams were constructed to determine eutectic compositions. Differences in functional group position and variations in supramolecular growth were found to dictate the formation of eutectics versus cocrystals. Supramolecular synthon energy calculations on selected combinations validated the formation of eutectic versus cocrystal.

Published
2018

7. First-line antituberculosis drug, pyrazinamide, its pharmaceutically relevant cocrystals and a salt

Author

Trishna Rajbongshi, Sourav Bhowmick, Kashyap Kumar Sarmah, and Ranjit Thakuria

Subjects
Coumaric Acids, Antitubercular Agents, Supramolecular chemistry, Substituent, 02 engineering and technology, Crystallography, X-Ray, 010402 general chemistry, 01 natural sciences, Medicinal chemistry, Cocrystal, Cinnamic acid, Ferulic acid, chemistry.chemical_compound, Hydroxybenzoates, Materials Chemistry, Organic chemistry, Solubility, Calorimetry, Differential Scanning, Hydrogen bond, Spectrum Analysis, Benzenesulfonates, Synthon, Metals and Alloys, Resorcinols, 021001 nanoscience & nanotechnology, Pyrazinamide, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, chemistry, Crystallization, 0210 nano-technology, Powder Diffraction
Abstract

A few pyrazinamide (Pyz) cocrystals involving hydroxybenzoic/cinnamic acid derivatives [2,4-dihydroxybenzoic acid (24DHBA); 2,6-dihydroxybenzoic acid (26DHBA); 3,5-dihydroxybenzoic acid (35DHBA) and nutraceutical molecule ferulic acid (FRA)] and the first example of a molecular salt withp-toluenesulfonic acid (pTSA) have been prepared and characterized using various solid-state techniques. A high-temperature cocrystal polymorph of Pyz·FRA has been characterized from the endothermic peaks observed using differential scanning calorimetry. The presence of substituent groups carrying hydrogen bond donors or acceptors and their influence on supramolecular synthon formation has been investigated using a Cambridge Structural Database search. Equilibrium solubility of all the binary complexes of Pyz follows the order of their coformer solubility,i.e.Pyz+·pTSA−> Pyz·35DHBA > Pyz > Pyz·26DHBA > Pyz·24DHBA > Pyz·FRA. A twofold enhancement in solubility of Pyz+·pTSA−molecular salt compared with the parent drug suggests a potential drug formulation for the treatment of tuberculosis.

Published
2017

8. Effect of solvent polarity in mechanochemistry: preparation of a conglomerate vs. racemate

Author

Trishna Rajbongshi, Kashyap Kumar Sarmah, Achyut Bhuyan, and Ranjit Thakuria

Subjects
chemistry.chemical_classification, Chemistry, Metals and Alloys, Salt (chemistry), General Chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Grinding, Dipole, Mechanochemistry, Polymer chemistry, Materials Chemistry, Ceramics and Composites, Solvent polarity, Polar
Abstract

Cocrystallization of racemic dl-tartaric acid (dl-ta) and achiral isoniazid (ISN) was investigated using mechanochemistry. Neat grinding (NG) and liquid-assisted grinding (LAG) in the presence of non-polar liquids result in the formation of a conglomerate (ISN·d-ta/ISN·l-ta); whereas LAG with polar liquids yields racemic salt ISN·dl-ta. The effect of solvent polarity and dipole moment in mechanochemistry is discussed.

Published
2019

9. Mechanosynthesis of Eutectics of Anti‐Inflammatory Drug Ethenzamide – A Comparison with Cocrystals Analogues.

Author

Rajbongshi, Trishna, Kumar Sarmah, Kashyap, Ganduri, Ramesh, Cherukuvada, Suryanarayan, Arhangelskis, Mihails, and Thakuria, Ranjit

Abstract

The Cover Feature shows the utility of mechanochemistry in the preparation of ethenzamide eutectics and cocrystals. Cocrystals were obtained with coformers like p‐hydroxybenzoic acid, ferulic acid and saccharin having additional strong hydrogen bonding functionality; conversely, eutectics were obtained with benzoic acid, cinnamic acid and pyrazinamide that lack the same. The results were supported by supramolecular synthon energy calculations. Overall, polymorphism in eutectics is unlikely and therefore eutectics make novel/ alternate solid forms devoid of polymorphism issues. More information can be found in the Full Paper by Trishna Rajbongshi et al. [ABSTRACT FROM AUTHOR]

Published
2021
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10. Contents list.

Subjects
FULLERENE derivatives, INTERSTITIAL hydrogen generation, FULLERENES, HEAT shock proteins, SILVER catalysts
Published
2023
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11. Non-stoichiometric carbamazepine cocrystal hydrates of 3,4-/3,5-dihydroxybenzoic acids: coformer–water exchange.

Author

Rajbongshi, Trishna, Sarmah, Kashyap Kumar, Das, Susobhan, Deka, Poonam, Saha, Arijit, Saha, Binoy K., Puschmann, Horst, Reddy, C. Malla, and Thakuria, Ranjit

Subjects
CARBAMAZEPINE, METHANE hydrates, ACIDS, ALLOYS, STOICHIOMETRY, MOLECULES
Abstract

The cocrystallisation of carbamazepine (CBZ) with 3,4-/3,5-dihydroxybenzoic acids (34/35DHBA) with different stoichiometries formed molecular alloys, exchanging a water molecule, in their isostructural CBZ dihydrate form. Furthermore, we show a correlation between the mechanical properties of the CBZ–DHBA cocrystals with the amount of coformer present. [ABSTRACT FROM AUTHOR]

Published
2023
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14. Effect of solvent polarity in mechanochemistry: preparation of a conglomerate vs. racemate.

Author

Sarmah, Kashyap Kumar, Rajbongshi, Trishna, Bhuyan, Achyut, and Thakuria, Ranjit

Subjects
CONGLOMERATE, DIPOLE moments, MECHANICAL chemistry, ISONIAZID
Abstract

Cocrystallization of racemic DL -tartaric acid (DL -ta) and achiral isoniazid (ISN) was investigated using mechanochemistry. Neat grinding (NG) and liquid-assisted grinding (LAG) in the presence of non-polar liquids result in the formation of a conglomerate (ISN· D -ta/ISN· L -ta); whereas LAG with polar liquids yields racemic salt ISN· DL -ta. The effect of solvent polarity and dipole moment in mechanochemistry is discussed. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
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15. First-line antituberculosis drug, pyrazinamide, its pharmaceutically relevant cocrystals and a salt.

Author

Sarmah, Kashyap Kumar, Rajbongshi, Trishna, Bhowmick, Sourav, and Thakuria, Ranjit

Subjects
PYRAZINAMIDE, TUBERCULOSIS treatment, HYDROXYBENZOIC acid, FERULIC acid, DIFFERENTIAL scanning calorimetry, THERAPEUTICS
Abstract

A few pyrazinamide (Pyz) cocrystals involving hydroxybenzoic/cinnamic acid derivatives [2,4-dihydroxybenzoic acid (24DHBA); 2,6-dihydroxybenzoic acid (26DHBA); 3,5-dihydroxybenzoic acid (35DHBA) and nutraceutical molecule ferulic acid (FRA)] and the first example of a molecular salt with p-toluenesulfonic acid ( pTSA) have been prepared and characterized using various solid-state techniques. A high-temperature cocrystal polymorph of Pyz·FRA has been characterized from the endothermic peaks observed using differential scanning calorimetry. The presence of substituent groups carrying hydrogen bond donors or acceptors and their influence on supramolecular synthon formation has been investigated using a Cambridge Structural Database search. Equilibrium solubility of all the binary complexes of Pyz follows the order of their coformer solubility, i.e. Pyz+· pTSA− > Pyz·35DHBA > Pyz > Pyz·26DHBA > Pyz·24DHBA > Pyz·FRA. A twofold enhancement in solubility of Pyz+· pTSA− molecular salt compared with the parent drug suggests a potential drug formulation for the treatment of tuberculosis. [ABSTRACT FROM AUTHOR]

Published
2017
Full Text
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16. Waste Management and Resource Recycling in the Developing World

Author

Pardeep Singh, Pramit Verma, Rishikesh Singh, Arif Ahamad, André C. S. Batalhão, Pardeep Singh, Pramit Verma, Rishikesh Singh, Arif Ahamad, and André C. S. Batalhão

Subjects
Refuse and refuse disposal--Developing countries, Salvage (Waste, etc.)--Developing countries, Refuse and refuse disposal
Abstract

Waste Management and Resource Recycling in the Developing World provides a unique perspective on the state of waste management and resource recycling in the developing world, offering practical solutions based on innovative tools and technologies, along with examples and case studies. The book is organized by waste type, including electronic, industrial and biomedical/hazardous, with each section covering advanced techniques, such as remote sensing and GIS, as well as socioeconomic factors, transnational transport and policy implications. Waste managers, environmental scientists, sustainability practitioners, and engineers will find this a valuable resource for addressing the challenges of waste management in the developing world. There is high potential for waste management to produce energy and value-added products. Sustainable waste management based on a circular economy not only improves sanitation, it also provides economic and environmental benefits. In addition to waste minimization, waste-to-economy and waste-to-energy have become integral parts of waste management practices. A proper waste management strategy not only leads to reduction in environmental pollution but also moves toward generating sufficient energy for improving environmental sustainability in coming decades. - Presents case studies in every section to illustrate practical applications across the globe - Includes lessons learned from developed regions that can be applied to developing regions - Organized by type of waste, with consistent coverage in each section to promote ease of navigation

Published
2023

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