Department of Chemistry

Indian Institute of Technology Palakkad&nbsp;(IIT Palakkad or IIT PKD) is a public autonomous&nbsp;engineering&nbsp;and&nbsp;research&nbsp;institute located in&nbsp;Palakkad,&nbsp;Kerala. It was&nbsp;one of the five new&nbsp;IITs&nbsp;proposed in the&nbsp;2014 Union budget of India. The campus was inaugurated on 3 August 2015. The institute has 94 faculty, 978 students, and 63 non-teaching staffs.

IT Palakkad currently offers four-year Bachelor of Technology (B.Tech) and two years MS programmes in 8 different engineering disciplines including&nbsp;Computer Science, Electrical, Mechanical, Civil among others.

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IIT Palakkad

Reductions of the in situ generated CO and N2 complexes of Cummins’ molybdenum(III) tris(anilide) complex, viz. [Mo(L){N(Ar’)But}3] (L=CO or N2, Ar’=3,5-dimethylphenyl), using a dimagnesium(I) compound, [{(MesNacnac)Mg}2] (MesNacnac=[HC(MeCNMes)2]−, Mes=mesityl), are reported. Reduction of [Mo(CO){N(Ar’)But}3] afforded a mixture of products, three of which were isolated in low yield and crystallographically characterized. These were a molybdenum(II) tris(carbamoyl) complex, [(MesNacnac)Mg{μ-(O=)[But(Ar’)N]C}3Mo(CO)3] 1, a magnesium(II) carbamate, [{(MesNacnac)Mg[μ-O2CN(Ar’)But]}2] 2 and the 1,3-diamino-1,2,3-trione, But(Ar’)NC3(=O)3N(Ar’)But 3. The mechanisms of formation of these products are speculated upon. The reduction of [Mo(N2){N(Ar’)But}3] with [{(MesNacnac)Mg}2], in the presence of the N-heterocyclic carbene, :C{N(Me)C(Me)}2 TMC, gave the heterobimetallic molybdenum(II) diazenido complex, [(MesNacnac)(TMC)Mg(μ-N2)Mo{N(Ar’)But}3] 4, in a low-moderate isolated yield. Reaction of this with chlorotrimethylsilane afforded an essentially quantitative yield of the known silyldiazenido complex, [(Me3SiN2)Mo{N(Ar’)But}3] 5. © 2021 Wiley-VCH GmbH

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European Journal of Inorganic Chemistry

Magnesium(I) Reduction of CO and N2 Complexes of Cummins’ Molybdenum(III) Tris(anilide), [Mo(L)\{N(Ar’)But\}3] (L=CO or N2; Ar’=3,5‐dimethylphenyl)

Reaction of several N-heterocyclic carbenes, a carbodiphosphorane and bis(diphenylphosphino)ethane (DPPE) with [BeX2(OEt2)2] (X = Br or I) have yielded a variety of beryllium dihalide adduct complexes, all of which were crystallographically characterised. Attempts to reduce the compounds to low oxidation state beryllium complexes using a variety of reducing agents have been carried out, but were of limited success. However, reaction of [(IPr)BeBr2] (IPr = :C{(DipNCH)2}; Dip = 2,6-diisopropylphenyl) with the aluminium(i) heterocycle, [:Al(DipNacnac)] (DipNacnac = [HC(MeCNDip)2]−) afforded the adduct complex, [{(IPr)(Br)Be(μ-H)}2], while reduction of [(IPr)BeBr2] with potassium naphthalenide gave the beryllium naphthalenediyl complex, [(IPr)Be(C10H8)]. Furthermore, reaction of [{(DPPE)BeI2}∞], with [:Al(DipNacnac)] led to insertion of the Al centre of the heterocycle into a Be-I bond and formation of a rare example of an Al-Be bonded complex, [(DPPE)(i)Be-Al(i)(DipNacnac)]. © The Royal Society of Chemistry 2021.

Dalton Transactions

N-Heterocyclic carbene, carbodiphosphorane and diphosphine adducts of beryllium dihalides: synthesis, characterisation and reduction studies

Binder jet 3D printing is an emerging technology in the field of rapid prototyping which has a capability of processing a wide range of materials, including metals and ceramics. The main aim of our project is to design and fabricate gypsum prototypes based on binder jetting technology. The gypsum powder is chosen for the development of green part and Sodium silicate also called as water glass is used as a binder for the gypsum based green part. These materials are low cost, easily available materials and are utilized for developing the gypsum prototypes and hence it reduces the cost of building of binder jetting machine. This paper presents our design modifications from the existing open source binder jetting machine (Oasis 3DP) to make it efficient in terms of cost, build and performance. The modifications are introduced in the build volume, binder extrusion head, support structures and gantry mechanism. With this new design introductions in the powder 3D printing machine, we can develop intricate, complex shaped gypsum prototypes and yield high green part strength. These modifications also unlock the full potential of the binder jetting technology and allow us to vision more in utilizing different types of powder materials like sugar, metallic powder, gypsum and ceramics with suitable corresponding binder. (c) 2021 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Advances in Materials Research-2019.

MATERIALS TODAY-PROCEEDINGS

Design and fabrication of gypsum prototypes based on binder jetting technology

Reductions of the in situ generated CO and N-2 complexes of Cummins' molybdenum(III) tris(anilide) complex, viz. {[}Mo(L)\{N(Ar')Bu-t\}(3)] (L=CO or N-2, Ar'=3,5-dimethylphenyl), using a dimagnesium(I) compound, {[}\{((Mes)Nacnac)Mg\}(2)] ((Mes)Nacnac={[}HC(MeCNMes)(2)](-), Mes=mesityl), are reported. Reduction of {[}Mo(CO)\{N(Ar')Bu-t\}(3)] afforded a mixture of products, three of which were isolated in low yield and crystallographically characterized. These were a molybdenum(II) tris(carbamoyl) complex, {[}((Mes)Nacnac)Mg\{mu-(O=){[}Bu-t(Ar')N]C\}(3)Mo(CO)(3)] 1, a magnesium(II) carbamate, {[}\{((Mes)Nacnac)Mg{[}mu-O2CN(Ar')Bu-t]\}(2)] 2, and the 1,3-diamino-1,2,3-trione, Bu-t(Ar')NC3(=O)(3)N(Ar')Bu-t 3. The mechanisms of formation of these products are speculated upon. The reduction of {[}Mo(N-2)\{N(Ar')Bu-t\}(3)] with {[}\{((Mes)Nacnac)Mg\}(2)], in the presence of the N-heterocyclic carbene, :C\{N(Me)C(Me)\}(2) TMC, gave the heterobimetallic molybdenum(II) diazenido complex, {[}((Mes)Nacnac)(TMC)Mg(mu-N-2)Mo\{N(Ar')Bu-t\}(3)] 4, in a low-moderate isolated yield. Reaction of this with chlorotrimethylsilane afforded an essentially quantitative yield of the known silyldiazenido complex, {[}(Me3SiN2)Mo\{N(Ar')Bu-t\}(3)] 5.

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY

Magnesium(I) Reduction of CO and N2 Complexes of Cummins' Molybdenum(III) Tris(anilide), {[}Mo(L)\{N(Ar')But\}3] (L=CO or N2; Ar'=3,5-dimethylphenyl)

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Green MIP-202(Zr) Catalyst: Degradation and Thermally Robust Biomimetic Sensing of Nerve Agents

Herein, we report on selectivity control in C-H activations with alkylidenecyclopropanes (ACPs) for the chemo-selective assembly of cyclopropanes or dienes. Thus, unprecedented rhodaelectro-catalyzed C-H activations were realized with diversely decorated ACPs with a wide substrate scope and electricity as the sole oxidant. © The Royal Society of Chemistry 2021.

Fulltext

Chemical Communications

Rhodaelectro-catalyzed chemo-divergent C-H activations with alkylidenecyclopropanes for selective cyclopropylations

C–H phosphorylation was achieved by Earth-abundant nickel catalysts with waste-free electricity as the redox surrogate. The robust nickela-electrooxidative C–H activation of arenes, heteroarenes, and olefins with diverse phosphonating reagents successfully delivered arylphosphonates, phenylphosphine oxides, and diazaphospholidine oxides of relevance to bioactive compounds and materials. The guanidine-assisted electrooxidative C–P formation avoided chemical oxidants with molecular hydrogen as the sole byproduct. Catalytically relevant nickel(II) and nickel(III) intermediates were isolated and fully characterized by X-ray diffraction analysis. Catalytically relevant nickel complexes were observed by in operando high-resolution electrospray ionization mass spectrometry (HR-ESI-MS) monitoring. Cyclic voltammetry analysis and density functional theory (DFT) calculations provided strong evidence for a nickel(III/IV/II) manifold. © 2021 Elsevier Inc.

Chem

Electrocatalytic C–H phosphorylation through nickel(III/IV/II) catalysis

Infectious diseases caused by viruses can elevate up to undesired pandemic conditions affecting the global population and normal life function. These in turn impact the established world economy, create jobless situations, physical, mental, emotional stress, and challenge the human survival. Therefore, timely detection, treatment, isolation and prevention of spreading the pandemic infectious diseases not beyond the originated town is critical to avoid global impairment of life (e.g., Corona virus disease - 2019, COVID-19). The objective of this review article is to emphasize the recent advancements in the electrochemical diagnostics of twelve life-threatening viruses namely - COVID-19, Middle east respiratory syndrome (MERS), Severe acute respiratory syndrome (SARS), Influenza, Hepatitis, Human immunodeficiency virus (HIV), Human papilloma virus (HPV), Zika virus, Herpes simplex virus, Chikungunya, Dengue, and Rotavirus. This review describes the design, principle, underlying rationale, receptor, and mechanistic aspects of sensor systems reported for such viruses. Electrochemical sensor systems which comprised either antibody or aptamers or direct/mediated electron transfer in the recognition matrix were explicitly segregated into separate sub-sections for critical comparison. This review emphasizes the current challenges involved in translating laboratory research to real-world device applications, future prospects and commercialization aspects of electrochemical diagnostic devices for virus detection. The background and overall progress provided in this review are expected to be insightful to the researchers in sensor field and facilitate the design and fabrication of electrochemical sensors for life-threatening viruses with broader applicability to any desired pathogens. © 2021 Elsevier B.V.

Biosensors and Bioelectronics

Electrochemical diagnostics of infectious viral diseases: Trends and challenges

In the present era, the consumption of electricity has increased rapidly with each passing year, due to the industrialization. Coal is a raw material for the production of electricity in the thermal power stations. Particularly, a large amount of unused ash is dumped in ponds, which are major problem concerning many developing countries. Further, dumping of ash in ponds causes environmental hazards effects such as soil, land and water pollution. Identifying a viable alternative to utilize pond ash becomes a necessity, to avoid these environmental hazards. In this research work, an attempt has been made to partially replace cement by the pond ash as a supplementary cementitious material {[}SCM] in concrete, which will considerably reduce the hazardous effects of pond ash, to the environment. The pond ash was ground to 45 mu m and it was used to replace the cement in concrete by proportions of 5, 10, 15, 20 and 25\% by mass. Test on compressive strength, split tensile strength and modulus of rupture were conducted on concrete mixes. The result indicate that the addition of 10\% pond ash to concrete significantly increased the strength properties of the concrete at the age of 7, 28, 56 and 90 days.

CEMENT WAPNO BETON

Experimental investigation on strength properties of concrete incorporating ground pond ash

This paper deals with automatic spot welding, hemming and material handling in automotive industries. Here, hood, doors and tail gate are processed by implementation of robots. Spot welding and hemming of the panels are the two operations which decide the quality of the car body. The quality of hemming and spot welding should be highly accurate, which consumes more time if done manually. There will be quality defects if it is done manually and high rate of production cannot be achieved. The robots were selected according to the payload required and space available. In this project, all the processes were simulated using the software and the entire robot operations were also simulated in the virtual environment to check for collision, cycle time, reach and range. Finally the simulated robot work cell is implemented on the floor and the robots were programmed to do their specific tasks without any interference of humans. (c) 2021 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Advances in Materials Research-2019.