Gourisankar Roymahapatra | HALDIA INSTITUTE OF TECHNOLOGY (original) (raw)
Dr. Gourisankar Roymahapatra, currently working as an Associate Professor of Chemistry at the School of Applied Science and Humanities, HIT Haldia, India, is a passionate researcher of chemistry. He completed his Ph.D. from Jadavpur University, Kolkata (2014) with N-Heterocyclic Carbene Chemistry as a major field under the mentoring of Dr. Joydev Dinda of HIT Haldia, and Prof. Ambikesh Mahapatra of Jadavpur University. Dr. Roymahapatra graduated (BSc) from Midnapore College (2000), did MSc in Physical Chemistry (2003), and in Organic Chemistry (2005), from DAV PG College, Kanpur, India. Before joining to academia, he worked at MCC PTA Chem. Corp. Pvt. Ltd India (MCPI), Haldia, (2003 ~ 2011) as a Senior Chemist. He worked at the Global Institute of Science and Technology (GIST Haldia), as a Lecturer in Chemistry in the year 2011 and then he moved to HIT Haldia in 2015 as an Assistant Professor of Chemistry. His area of research interest includes NHC complexes, organometallics, catalysis, antibiotics, anti-carcinogenic, gas adsorption, super alkali, and computational chemistry. Dr. Roymahaptra received ‘NCQC-2007 Per-Excellent Award’ and ‘CCQC-2010 Gold Award’ for his contribution in Quality Control during his tenure at MCPI Haldia. For his contribution in research, he got the ‘Distinguished Young Scientist Award in Chemistry -2014’ from the ‘World Science Congress’, India; the prestigious ‘Bharat Gaurabh Award – 2018’ from IISF, India; and the ‘Indian Chemical Society Research Excellent Award 2021’ from the Indian Chemical Society, ‘Best Researcher Award’, from the Research Education Solution, Noida, India. Dr. Roymahapatra is a Life Fellow of the Indian Chemical Society (FICS), Life Fellow of the Institutes of Chemistry (India) (FIC) and a Life Fellow of Renewable Energy Society of India (FRESI). He is the Vice-president of Haldia Vigyan Parishad (HVP) from 2018-2020, and 2021-2023. Dr. Roymahaptra has published 74 research articles in several international journals, including 11 Book Chapters. Dr. Roymahaptra is the editor of ‘Education in Chemical Science and Technology, and ‘Chemical Warta’ published by the Indian Chemical Society, ES Energy and Environment published by ES Publisher, USA. Dr. Roymahapatra is the editorial board member and reviewer of several national and international journals. He was the Guest Editor of “Prof. D. C. Mukherjee Special Issue”, J. Indian Chem. Soc. Vol 98, Issue 5, 2021, “Acharya PC Ray special issue”, ES Material and Manufacturing (Dec-2022), “Prof. G. D. Yadav Special Issue”, J. Indian Chem. Soc. 2023.
Address: Department of Applied Sciences, Haldia Institute of Technology, ICARE Complex, Haldia 721657, India
less
Uploads
Papers by Gourisankar Roymahapatra
Zenodo (CERN European Organization for Nuclear Research), Aug 31, 2022
Chemistry, teaching of chemistry and chemical education has changed over time. Chemistry as a sep... more Chemistry, teaching of chemistry and chemical education has changed over time. Chemistry as a separate science, evolved at the late eighteenth century with the work of Proust and Lavoisier. In the nineteenth century, the separation techniques of compounds and elements was one of the major achievement of chemistry. With the start of organic
Advances in chemical and materials engineering book series, Jun 30, 2023
Advanced Composites and Hybrid Materials
Applied Organometallic Chemistry
Four copper (II) complexes bearing tris‐(2‐pyridyl)‐pyrazolyl borate (Tppy) ligand with correspon... more Four copper (II) complexes bearing tris‐(2‐pyridyl)‐pyrazolyl borate (Tppy) ligand with corresponding chloride (Cu‐1), aqua (Cu‐2), azide (Cu‐3), and thiocyanide (Cu‐4) substitutions were synthesized and characterized by spectroscopic and analytical methods. Spectroscopic and molecular docking studies were employed to investigate the interactions of these complexes with calf thymus (CT) DNA and bovine serum albumin (BSA). The results inferred intercalation binding mode of the complexes with DNA. All the complexes exhibited good binding with BSA as well. In addition, the binding efficacy of the Cu (II) complexes with SARS‐Cov‐2 was tested in silico. Further, in vitro anticancer activity of the complexes was investigated against the HeLa‐cervical, HepG2‐liver and A549‐lung cancer, and one normal (L929‐fibroblast) cell line. IC50 values unveiled that the complexes were more active than cisplatin against all three cancer cells. It was understood that complex Cu‐3 containing azide substi...
Zenodo (CERN European Organization for Nuclear Research), Aug 31, 2022
Chemistry, teaching of chemistry and chemical education has changed over time. Chemistry as a sep... more Chemistry, teaching of chemistry and chemical education has changed over time. Chemistry as a separate science, evolved at the late eighteenth century with the work of Proust and Lavoisier. In the nineteenth century, the separation techniques of compounds and elements was one of the major achievement of chemistry. With the start of organic
ES Food & Agroforestry
Computational and Theoretical Chemistry
Journal of Molecular Liquids, Oct 1, 2022
Journal of the Indian Chemical Society, May 1, 2021
Abstract In search of a potential hydrogen storage material, we have used three different aromati... more Abstract In search of a potential hydrogen storage material, we have used three different aromatic N-heterocyclic systems; Pyrazine, Pyrimidine, and Pyridazine. The alkali (Li, Na, and K) metallated heterocyclic systems (M@C4H4N2) are stabilized as cation found to be superalkali with a vertical electron affinity ranges from 4.42 to 3.97 eV. First principle calculations reveal that M@heterocylclic systems can adsorb up to 10–18H2 molecules with gravimetric wt% of 17. It has been observed that all the trapping process belongs to physisorption as H2 are almost in a molecular form with a slight increase in bond length. Binding energy values favor gradual H2 adsorbtion. Superalkali nature is gradually increasing upon the increasing number of H2 molecules but attains a constant value after certain numbers. Among three isomers Pyrazine, Pyrimidine, and Pyridazine, Li@Pyrazine complex is found to be the most suitable for H2 storage.
Journal of nanostructure in chemistry, Aug 20, 2022
Zenodo (CERN European Organization for Nuclear Research), Feb 28, 2023
This article deals with the different types of the hydrogen storage process, its thermochemistry,... more This article deals with the different types of the hydrogen storage process, its thermochemistry, adsorption process, and binding energy, in the light of the computational approach using the conceptual density functional theory (CDFT). This article expresses the view that lithium iodide (LiI) is a viable template for hydrogen storage at low temperatures. The density functional theory (DFT) has been used to investigate the structure and chemical reactivity of the resulting templates. The adsorption process is found to be quasi-sorption in nature. The molecular hydrogen interacts with building blocks (with Li centre) through electrovalent interaction and a single LiI molecule is capable of absorbing 10 H 2 with a high gravimetric wt% value (13.07 wt%) which is found to be a promising system as per standard. The changes in Gibbs free energy indicate that hydrogen adsorption can occur spontaneously at cryogenic temperatures.
Computational and Theoretical Chemistry, Apr 1, 2022
ES materials & manufacturing, 2023
ES materials & manufacturing, 2023
Zenodo (CERN European Organization for Nuclear Research), Aug 31, 2022
This paper demonstrates how machine learning methods can replace conventional approaches to fitti... more This paper demonstrates how machine learning methods can replace conventional approaches to fitting data measured in chemistry experiments, especially those which are conducted at the undergraduate level. As a case study, raw data collected from a Phenol-water experiment is used to outline the methodology needed to arrive at the best fit curve. Code snippets are provided and explained in detail and metrics from different models are tabulated and compared. The model with the best performing metrics is then chosen as the representative fit.
Journal of Molecular Structure, Sep 1, 2022
![Research paper thumbnail of Synthesis, structure and theoretical studies of Hg(II)–NH carbene complex of annulated ligand pyridinyl[1,2-a]{2-pyridylimidazol}-3-ylidene hexaflurophosphate](https://attachments.academia-assets.com/109080522/thumbnails/1.jpg)
](Inorganica Chimica Acta, Sep 1, 2011
Dedicated to the memory of Ron Snaith who for DRA and REM was an inspirational teacher, a pre-emi... more Dedicated to the memory of Ron Snaith who for DRA and REM was an inspirational teacher, a pre-eminent researcher and a revered colleague and friend
Advanced composites and hybrid materials, Jun 1, 2022
ES materials & manufacturing, 2023
Gallium (Ga)-doped zinc oxide (GZO) thin film is a promising alternative anode material to indium... more Gallium (Ga)-doped zinc oxide (GZO) thin film is a promising alternative anode material to indium doped tin oxide (ITO) in organic light-emitting diode (OLED) applications. In this paper, ZnO:Ga transparent conducting oxide (TCO) thin films were deposited on glass substrates by radio frequency (RF) magnetron sputtering techniques. Variations of electrical, optical, and structural properties of GZO films with different substrate temperatures were investigated. Among different substrate temperatures, 200 ºC substrate temperature deposited film shows the lowest resistivity 2.45×10-4 Ω cm with an optical transmission of more than 90 %. Finally, GZO thin film was used as an anode material in OLED devices and was also compared with the ITO anode-based OLED. The obtained GZO-based OLED shows similar performance compared with ITO-based OLED devices.
Zenodo (CERN European Organization for Nuclear Research), Aug 31, 2022
Chemistry, teaching of chemistry and chemical education has changed over time. Chemistry as a sep... more Chemistry, teaching of chemistry and chemical education has changed over time. Chemistry as a separate science, evolved at the late eighteenth century with the work of Proust and Lavoisier. In the nineteenth century, the separation techniques of compounds and elements was one of the major achievement of chemistry. With the start of organic
Advances in chemical and materials engineering book series, Jun 30, 2023
Advanced Composites and Hybrid Materials
Applied Organometallic Chemistry
Four copper (II) complexes bearing tris‐(2‐pyridyl)‐pyrazolyl borate (Tppy) ligand with correspon... more Four copper (II) complexes bearing tris‐(2‐pyridyl)‐pyrazolyl borate (Tppy) ligand with corresponding chloride (Cu‐1), aqua (Cu‐2), azide (Cu‐3), and thiocyanide (Cu‐4) substitutions were synthesized and characterized by spectroscopic and analytical methods. Spectroscopic and molecular docking studies were employed to investigate the interactions of these complexes with calf thymus (CT) DNA and bovine serum albumin (BSA). The results inferred intercalation binding mode of the complexes with DNA. All the complexes exhibited good binding with BSA as well. In addition, the binding efficacy of the Cu (II) complexes with SARS‐Cov‐2 was tested in silico. Further, in vitro anticancer activity of the complexes was investigated against the HeLa‐cervical, HepG2‐liver and A549‐lung cancer, and one normal (L929‐fibroblast) cell line. IC50 values unveiled that the complexes were more active than cisplatin against all three cancer cells. It was understood that complex Cu‐3 containing azide substi...
Zenodo (CERN European Organization for Nuclear Research), Aug 31, 2022
Chemistry, teaching of chemistry and chemical education has changed over time. Chemistry as a sep... more Chemistry, teaching of chemistry and chemical education has changed over time. Chemistry as a separate science, evolved at the late eighteenth century with the work of Proust and Lavoisier. In the nineteenth century, the separation techniques of compounds and elements was one of the major achievement of chemistry. With the start of organic
ES Food & Agroforestry
Computational and Theoretical Chemistry
Journal of Molecular Liquids, Oct 1, 2022
Journal of the Indian Chemical Society, May 1, 2021
Abstract In search of a potential hydrogen storage material, we have used three different aromati... more Abstract In search of a potential hydrogen storage material, we have used three different aromatic N-heterocyclic systems; Pyrazine, Pyrimidine, and Pyridazine. The alkali (Li, Na, and K) metallated heterocyclic systems (M@C4H4N2) are stabilized as cation found to be superalkali with a vertical electron affinity ranges from 4.42 to 3.97 eV. First principle calculations reveal that M@heterocylclic systems can adsorb up to 10–18H2 molecules with gravimetric wt% of 17. It has been observed that all the trapping process belongs to physisorption as H2 are almost in a molecular form with a slight increase in bond length. Binding energy values favor gradual H2 adsorbtion. Superalkali nature is gradually increasing upon the increasing number of H2 molecules but attains a constant value after certain numbers. Among three isomers Pyrazine, Pyrimidine, and Pyridazine, Li@Pyrazine complex is found to be the most suitable for H2 storage.
Journal of nanostructure in chemistry, Aug 20, 2022
Zenodo (CERN European Organization for Nuclear Research), Feb 28, 2023
This article deals with the different types of the hydrogen storage process, its thermochemistry,... more This article deals with the different types of the hydrogen storage process, its thermochemistry, adsorption process, and binding energy, in the light of the computational approach using the conceptual density functional theory (CDFT). This article expresses the view that lithium iodide (LiI) is a viable template for hydrogen storage at low temperatures. The density functional theory (DFT) has been used to investigate the structure and chemical reactivity of the resulting templates. The adsorption process is found to be quasi-sorption in nature. The molecular hydrogen interacts with building blocks (with Li centre) through electrovalent interaction and a single LiI molecule is capable of absorbing 10 H 2 with a high gravimetric wt% value (13.07 wt%) which is found to be a promising system as per standard. The changes in Gibbs free energy indicate that hydrogen adsorption can occur spontaneously at cryogenic temperatures.
Computational and Theoretical Chemistry, Apr 1, 2022
ES materials & manufacturing, 2023
ES materials & manufacturing, 2023
Zenodo (CERN European Organization for Nuclear Research), Aug 31, 2022
This paper demonstrates how machine learning methods can replace conventional approaches to fitti... more This paper demonstrates how machine learning methods can replace conventional approaches to fitting data measured in chemistry experiments, especially those which are conducted at the undergraduate level. As a case study, raw data collected from a Phenol-water experiment is used to outline the methodology needed to arrive at the best fit curve. Code snippets are provided and explained in detail and metrics from different models are tabulated and compared. The model with the best performing metrics is then chosen as the representative fit.
Journal of Molecular Structure, Sep 1, 2022
Inorganica Chimica Acta, Sep 1, 2011
Dedicated to the memory of Ron Snaith who for DRA and REM was an inspirational teacher, a pre-emi... more Dedicated to the memory of Ron Snaith who for DRA and REM was an inspirational teacher, a pre-eminent researcher and a revered colleague and friend
Advanced composites and hybrid materials, Jun 1, 2022
ES materials & manufacturing, 2023
Gallium (Ga)-doped zinc oxide (GZO) thin film is a promising alternative anode material to indium... more Gallium (Ga)-doped zinc oxide (GZO) thin film is a promising alternative anode material to indium doped tin oxide (ITO) in organic light-emitting diode (OLED) applications. In this paper, ZnO:Ga transparent conducting oxide (TCO) thin films were deposited on glass substrates by radio frequency (RF) magnetron sputtering techniques. Variations of electrical, optical, and structural properties of GZO films with different substrate temperatures were investigated. Among different substrate temperatures, 200 ºC substrate temperature deposited film shows the lowest resistivity 2.45×10-4 Ω cm with an optical transmission of more than 90 %. Finally, GZO thin film was used as an anode material in OLED devices and was also compared with the ITO anode-based OLED. The obtained GZO-based OLED shows similar performance compared with ITO-based OLED devices.
Advanced Surface Coating Techniques for Modern Industrial Applications, Publisher: IGI Global, 2020
Surface engineering defines the enhancement of certain properties of the surface of a component. ... more Surface engineering defines the enhancement of certain properties of the surface of a component. Two main concern of surface engineering are (1) to increase the wear resistance or damage resistance of the component, and (2) to modify its frictional behavior. The components which enhance the response can be suitably design by the knowledge of surface engineering to exhibit a combination of properties that provides a more favourable tribological response. However, the properties of the surface engineered layer and the properties of the substrate is not only the crucial things, but also the properties of the interface, which can be classified as being either sharp or diffuse. Surface engineered component is not only associated with the behaviour of the surface material, but also with the material below the surface. Today, there are many different Surface engineering techniques available; starting from vacuum to atmospheric pressure, wet to dry, simple to sophisticated, and low-cost to high-cost to obtain the required purposeful distinctiveness of material. Most methods used today are dry and thus environmentally sound. This chapter describes various types of coatings over materials to get an overall idea of the technique keeping prime focus on graduate and undergraduate students.
![Research paper thumbnail of Xylene bridged - N, N’-Olefin Functionalized Bis-Imidazolium Ag(I)/Au(I)-NHC Bromide Complexes and their Supramolecular Framework [ISBN:9788186772898, CHAPTER-14, pp 179-191]](https://attachments.academia-assets.com/49858940/thumbnails/1.jpg)
](![Research paper thumbnail of Jute-bamboo composites as an alternative building material for seismic and cyclone prone (coastal) zone [ISBN:978-81-926694-0-3, CHAPTER-16, pp 173-189]](https://attachments.academia-assets.com/49858841/thumbnails/1.jpg)
](Heavy weight of concrete as building material causes life damage and huge death in seismic and cy... more Heavy weight of concrete as building material causes life damage and huge death in seismic and cyclone prone (coastal) zone during building collapsed. We are also facing scarcity of wood (not only used as building material but majorly used in furniture industry, paper industry and several other purposes) due to rapid urbanization. Global environmental consciousness induced us to use the other materials like metal, plastic etc. But, most of them are non-biodegradable and they need huge energy to process. As a result these materials are not eco-friendly materials. In this situation jute and bamboo has immerged an important substitution of wood, metal, concrete and may be called as super eco-friendly in all respects, and these materials are been used from our parent civilization. Today, much technological advancement have been made for utilizing bamboo (green material) as building material and jute-bamboo composite have been developed using phenoplast and aminoplast resin adhesives. Thus, making beams, panels, windows and doors by utilizing jute-bamboo composite has got great industrial impact as both jute and bamboo are fast growing renewable cellulosic material. In structural design and for other purposes jute-bamboo composite plays an important role to serve various purposes. This paper presents the development of jute-bamboo composite as building material, their ecological purpose (eco-composite), and the study of their basic mechanical properties. Some of the general physico-mechanical properties like modulus of elasticity (MOE) and modulus of ruptured (MOR), tensile strength, internal bond strength, screw and nail holding strength, glue shear strength etc. have tested as per relevant IS specification. Here, we have uses 100 % indigenous technologies for the preparation of composite, which is not only light in weight and higher modular strength but also life saving. So from this study it has been concluded that jute-bamboo composite could be an ideal substitution for concrete and would be a great solution for ever depleting forest as well as heavy cost and energy to process concrete.
[
Bioplastics, popularly known as ‘green plastics’ have great importance and they are available in ... more Bioplastics, popularly known as ‘green plastics’ have great importance and they are available in different forms. Bioplastics are derived from biological sources i.e. starch, vegetable fats and oils etc. They are considered to be suitable for use as they depend less on fossil fuel as well as reduce hazardous wastes. There are enormous potential of its application in packaging technology and other allied industries. But bioplastic has recently organized a rush of propaganda and misperception due to its labeling as ‘biodegradable’. Bioplastics are not always biodegradable either, which can be another source of confusion for consumers. This paper article deals with the bioplastic technology and concern on biodegradability.
![Research paper thumbnail of The Effect of Arsenic On Fishes [ISBN: 978-93-84241-08-7; CHAPTER-10, pp 163]](https://attachments.academia-assets.com/49131066/thumbnails/1.jpg)
](
Proceedings of the International Conference on Natural Sciences and Engineering for Sustainable Development (NSESD2024), 2024
Transparent conducting oxides (TCOs) comprise a class of materials together appearance extreme el... more Transparent conducting oxides (TCOs) comprise a class of materials together appearance extreme electric
conductivities and optical transparency in the visible range, two antagonistic features. TCO films are used in a wide
range of applications such as low-emissivity windows, optoelectronic devices, transparent contacts for solar cells,
touch screens, flat panel displays, architectural smart glasses, and electromagnetic shielding devices. Ga-doped Zinc
Oxide (GZO) exhibits outstanding electrical conductivity (1460 S cm−1) and transparency (92%), making it a viable TCO material. In this work, Ga-doped Zinc oxide (GZO) thin film is a great and promising substitute material to ITO (Indium Doped Tin Oxide) in transparent antennas for reliable short range communication.