Priyabrata Banerjee

Central Mechanical Engineering Research Institute | CMERI · Surface Engineering and Tribology Group (CMERI)

Keeping in mind the urge of providing a single solution of multiple problems in real day scenario, multi-functional phenazine based dual-channel chromo-fluorogenic “opto-electronic nose”, CN-2 has been synthesized in a single step via catalytic FeCl3 mediated facile oxidative C-N bond fusion of o-anisidine in neat condition. In-situ generated monop...

It has been established that the performance of a lubricant blend depends upon the judicious choice and the optimized concentration of the lubricant additive(s). From the literature data, it has been revealed that various organic molecules, complexes, etc. are used as proficient lubricant additives. In order to develop cost-effective, efficient sur...

Interest in using graphene and graphene oxide (GO)-based polymer composites as effective corrosion inhibitors is mounting due to their fascinating characteristics such as large surface area coverage, good adhesion property, chemical resistivity, hydrophobicity, chemical and mechanical stability, and so on. The major works based on anticorrosive per...

Graphene and graphene oxide (GO) have grabbed special attention in the domain of corrosion mitigation due to their superior characteristics such as large surface coverage, chemical, as well as mechanical stability and chemical resistivity. GO exhibits high water dispersibility due to presence of oxygen functional groups within its scaffold, which m...

Synthesis of challenging corrosion inhibitors is of prime importance to inhibit hydrogen-induced and localised metallic corrosion occur in the corrosive acidic solution. In this regard, the present research has been focused on the development of functionalised Schiff bases, namely, 1-(benzo[d]thiazol-2-yl)-2-((furan-2-yl)methylene)hydrazine (BTFMH)...

An azophenine derivative based copper complex (CN-1•Cu²⁺) is rationally designed and unveiled herein for the first time in the realm of azophenine family, which can selectively detect cyanide from purely aqueous medium via metal-displacement approach (MDA). CN-1•Cu²⁺ exhibits ‘naked-eye’ chromogenic change from brown to yellow with corresponding hy...

An ab initio density functional theory (DFT) calculation revealed the electronic properties of azomethine functionalised epoxy, namely, 4-((oxiran-2-yl)methoxy)-N-(4-(4-(4-((oxiran-2-yl)methoxy)- benzylideneamino)phenoxy)benzylidene)benzenamine (DSBE) and amine based curing agent namely diethylenetriamine (DETA), triethylenetetraamine(TETA) and par...

Copper is an indispensable transition element owing to its significant physiological activities. However, an unregulated overloading of this biologically ubiquitous ion can induce severe neurodegenerative diseases. Likewise, amidst the anions,...

A fluorogenic and electrochemical chemosensor BHMMP has been synthesized for aqueous phase ppb level detection of Zn2+ and Cd2+. The chemosensor exhibited distinct CHEF-based turn-on fluorometric transformation upon the addition of Zn2+ and Cd2+ respectively. Distinct fluorogenic response of BHMMP in presence of urinary excreted Zn2+ and human sali...

Three benzo[]phenoxazine-based dyes have been designed by tailoring donor (D) and anchoring (A) moiety to benzo[]phenoxazinetemplate via DFT and TD-DFT method for Dye-sensitized solar cells (DSSCs) application. The transformation of basic benzo[]phenoxazine by incorporating triphenylamine as a donor (D) plus cyanoacrylic/cyanoacetic acid as anch...

Schiff bases prepared by condensation of 1-(3-aminopropyl)imidazole and three different naturally occurring aldehydes, namely salicylaldehyde, vanillin and cinnamaldehyde (ISSB, IVSB and ICSB, respectively) are tested as corrosion inhibitors for mild steel in 1 M HCl. Comparative effects of extended conjugation and +R effect bestowed by the electro...

Quantum chemical approaches are very much significant in the field of corrosion chemistry to understand the structure-property relationship of various organic molecules as corrosion inhibitors. Here is the adsorption behavior of three organic azo-dyes, viz. 6-((4-(diethylamino)-2-methylphenyl)diazenyl)benzo[de]isochromene-1,3-dione (named as Dye-1)...

An inimitable adsorbent “FI-TM-BWCC,” emanated from meta-phase-selective thermochemical modulation of excavation-squander (mine waste)-derived terra-firma (blackish white china clay, i.e., BWCC), is explored in the present work for fluoride (F⁻) adsorption purpose. FI-TM-BWCC portrayed an excellent adsorption efficiency (95% removal capacity and Qe...

The hard nanocomposite coatings comprised of titanium, silicon, boron, and carbon (Ti-Si-B-C) and titanium, silicon, boron, carbon, and nitrogen (Ti-Si-B-C-N) were deposited on SS 304 substrate using magnetron sputtering technique. The tribological properties of these Ti-Si-B-C and Ti-Si-B-C-N coatings were explored with the variation of load (200–...

Continuous monitoring of a variety of biomolecules and bio-relevant ions is of tremendous importance to maintain the physiological balance and evaluation of metabolic parameters. Therefore, development of fast, selective, sensitive...

Selective detection of a particular amino acid in aqueous medium by using suitable solid state fluorescence sensor can offer a reliable diagnostic tool in biomedical research. Herein, we report a tetratopic phosphonate ligand (H8L) based MnII-MOF (H8L-Mn-MOF) [a=28.211(8) Å, b=12.265(3) Å, c=10.535(3) Å, α=90°, β=99.295° (14), γ=90° and CCDC no. -1...

A promising naphthalene-functionalized ratiometric chemosensor (E)-1-((naphthalen-5-yl) methylene)-2-(2,4-dinitrophenyl) hydrazine (DNMH) is unveiled in the present work. DNMH demonstrates brisk discernible colorimetric response from yellow to red in the presence of CN-, a lethal environmental contaminant, in a near-perfect aqueous medium with a LO...

Designing efficient corrosion inhibiting molecules is very important prior to its synthesis and analysis of the anticorrosive property. In this regards, the double azomethine functionalised highly π-conjugated aromatic organic compounds possessing strong and moderate electron activating groups, namely, 4,4'-{1,4-phenylenebis[(E)-methanylylidene-(E)...

Automatic detection of corrosion inhibition efficacy by processing the microscopic images of the sample surface by using image texture analysis is a very useful technique in the contemporary research field. The reported technique is less time consuming with the capability of pattern recognition via quantification with preferences of suitable softwa...

A novel ionic liquid, L-proline nitrate and graphene oxide nanohybrid (IL-GO), was synthesized and characterised by FTIR, UV-Vis,¹H NMR,¹³C NMR and HR-TEM. The corrosion inhibition potency of IL-GO nanohybrid for mild steel in 1M HCl was examined by gravimetric measurements, electrochemical methods supplemented with SEM-EDS, XPS, contact angle meas...

Herein, we have reported two isostructural mononuclear metal complexes [M(HL)2(ClO4)2], wherein, M= Co²⁺ (viz. SN-1) and Ni²⁺ (viz. SN-2) and HL is NNO donor Schiff-base ligand i. e. ((E)-2-methyl-2-((pyridin-2-ylmethylene)amino)propan-1-ol) for unveiling as molecular sensor for S²⁻ (sulphide) like hazardous entity. The molecular probes have been c...

Increased water pollution and challenges in ultrafast recognition of the water pollutants poses considerable burden to the public health. The issue of providing clean water to rural people is always a daunting yet challenging task wherein building a centralized water treatment system along with proper pipeline to connect dispersed population is not...

Luminescence active 9−Anthracenealdehyde functionalized multichannel chemosensors, TMA ((9−(2,6−dichloro−4−trifluoromethyl phenyl hydrazono)methyl)) anthracene) followed by BMA ((9−(1,3−benzothiazol−2−ylhydrazono)methyl) anthracene) have been explored herein, with an eye to ppb level recognition of CN⁻ in semi−aqueous medium. The premeditated incor...

The arrival of organic moieties as corrosion inhibitors has expanded the research in the past few years which, as a result; involved different heteroatoms to be tested for their anti-corrosive potential. The presented research is focused on the synthesis of the aryl-substituted benzothiazoles namely 6-(4-Chlorophenyl) benzo[d]thiazol-2-amine (CBTA)...

In the boundary lubrication regime, the addition of long as well as straight alkyl chain containing additive exhibit a serendipitous impact on protecting various metallic surfaces or machinery components from friction and subsequent wear. In quest of environment-friendly, proficient friction-reducing, surface protective and cost-effective lubricant...

A novel oxene based unusual sensory receptor (HyMa) has been synthesized via. Knoevenagel condensation triggered carbon-heteroatom (oxygen) intramolecular bond formation reaction at room temperature for discriminative detection of multi-analytes like HSO4⁻, CN⁻, F⁻ & Al³⁺ by spectro-photometric alterations with profound selectivity with the detecti...

In real day scenario, it is an urge to provide a single solution of multiple problems. In this regard, herein rapid, selective and highly efficient chromo-fluorogenic detection of ammonia/aliphatic amines over aromatic amines has been investigated by means of a novel “opto-electronic nose”, CN-2, synthesized in a single-step via multiple inter/intr...

Herein, an amine decorated Cd(II) metal-organic framework (MOF) with a uninodal 6-c topology was synthesized as a suitable platform for facile post-synthetic modification (PSM). The as-synthesized parent d10-MOF (1) with free -NH2 centers, when functionalized with two different carbonyl substituents (1-naphthaldehyde and benzophenone) of varying co...

Emerging contaminants (ECs) in the environment, including personal care products, pesticides, and pharmaceuticals, have numerous fatal impacts in the environment, if left unregulated. Therefore effective detection of ECs is of substantial necessity for a sustainable future. ECs can be easily detected by chemosensors (chemical screening), irrespecti...

The chromogenic chemosensor ABH is capable to recognize and mitigate jeopardized As3+ and sequentially detect toxic F ⁻ by mimicking a logic gate ensemble. Arsenic Sensing Kit and RGB enable smartphone-based device have been explored.

Metallic materials undergo deterioration because of their reactions on exposure to different environments, this is termed as corrosion. The corrosion directly or indirectly causes severe degradation of metallic materials which sometimes remained unrenovated and ultimately it leads to impending catastrophic failure, accidents, shutdown of industries...

A variety of inorganic materials have been explored as efficient corrosion inhibitors and/or anticorrosive coating ingredients for several susceptible metallic substrates in order to protect them from the corrosive nature of the environment. Among the inorganic materials, magnesium oxide or magnesia (MgO), is also used as a corrosion inhibitor in s...

Corrosion is the deterioration of metals and its alloys by undergoing chemical reactions within the environments where these are exposed. It is a constant and continuous problem, often difficult to eliminate completely, but the prevention would be a more practical and achievable approach than complete elimination. Over the years, considerable effor...

Degradation due to corrosion of the metallic materials has an adverse impact on several industries. Consequently, it causes a huge fiscal drain across the globe. Hence, there emerges a dire need for shielding the metals and alloys prone to corrosive degradation. This has impelled the researchers to design and develop sustainable additives that can...

The cost of corrosion and its consequent catastrophes have adversely affected the economy of almost all nations across the globe, which is reflected in the fractional reduction in gross domestic products. The use of corrosion inhibitors derived from organic materials is the most practiced as well as most effective strategy for protecting metallic m...

The pathogenesis of Pick's disease is feasible by detection of the elevated level of Zn2+ in the body fluids. This work aims towards developing a suitable chemosensor towards detection of Zn2+ in human urine specimen and inside eukaryotic cell line. Fluorescence “turn on” in the presence of Zn2+ makes the chemosensor suitable for its utility in Pic...

Synthesis of highly efficient organic molecules to be used for corrosion inhibition is the prime importance to minimize the degradation of metal substrates from the corrosive solutions. In this regards, the theoretical exploration of the corrosion inhibitor before its application is very important. Herein, pyrene based two novel Schiff bases, viz.,...

Selective and sensitive moisture sensors have attracted immense attention due to their ability to monitor the humidity content in industrial solvents, food products, etc., for regulating industrial safety management. Herein, a hydroxy naphthaldehyde-based piezochromic luminogen, namely, 1-{[(2-hydroxyphenyl)imino]methyl}naphthalen-2-ol (NAP-1), has...

A nanocomposite coating of titanium, silicon, boron and carbon (Ti-Si-B-C) with variable width (3 to 25 µm) has been deposited on stainless steel 304 grade (SS-304) surface using magnetron sputtering. The variation in coating thickness of Ti-Si-B-C onto SS-304 was investigated to systematically explore its structural, mechanical, oxidation properti...

A nanocomposite coating of titanium, silicon, boron and carbon (Ti-Si-B-C) with variable width (3 to 25 µm) has been deposited on stainless steel 304 grade (SS-304) surface using magnetron sputtering. The variation in coating thickness of Ti-Si-B-C onto SS-304 was investigated to systematically explore its structural, mechanical, oxidation properti...

The inhibition effect of amino acid-based ionic liquid (IL), L-Alanine methyl ester nitrate referred to as L-AlaC1NO3 IL on the corrosion of mild steel (MS) in 1M HCl was investigated by weight loss and electrochemicalmeasurements at temperatures ranging from 30 °C to 60 °C. The percentage inhibition effieicencyincreased with the increase of the co...

In the present time, there is enormous need for environmentally friendly and effective corrosion inhibitors that can reduce tubular steel corrosion. The present paper explore the adsorption and corrosion inhibition behavior of three ionic liquids (ILs) namely 1-Methyl-1-propylpiperidinium Bromide (IL-1), 1-Butyl-1-methylpiperidinium Bromide (IL-2),...

The synthesis of novel l-proline nitrate ionic liquid referred to as [Pro][NO3] (IL), was performed and the ¹H, ¹³C NMR, and FT-IR spectroscopic techniques were used to elucidate the chemical structure. The inhibition properties of the [Pro][NO3] IL were evaluated for mild steel (MS) corrosion in 1 M HCl using gravimetric measurement, electrochemic...

ERcrude@CMERI-2020, a transition metal enriched polynuclear porous earthy regolith (ER), was crushed, sieved and subsequently chemically ammended by aqueous 0.3(M) SiO2 solution, to synthesize two novel geo-chemical-composites with specific silica-sesquioxide (S-S) ratio: ER1.30@CMERI-2020 and ER1.65@CMERI-2020. ER1.30@CMERI-2020 (BET surface area...

A multi-functional azophenine based colorimetric chemosensor, CN-1 has been reported by catalytic FeCl3 mediated facile oxidative C-N bond fusion of o-anisidine. The chemosensor, characterized by single crystal X-ray crystallography, can be exploited towards ‘naked-eye’ discriminative detection of Cu²⁺ and Hg²⁺ (LOD = 30 and 480 ppb respectively) f...

In order to address one of the most concerning issues of the 21st century, related to water scarcity, various water treatment technologies have been explored till date. Nonetheless, River Bank Filtration (RBF) is one of the most economically viable and environmentally feasible technologies to purify river water so as to produce pure water. Conseque...

In pursuit of addressing a global threat, allied to the purification of contaminated water bodies, a hitherto less explored hydrophobic covalent polymer (named as CPCMERI-2020) along with its post-synthetically modified composites, CPWCS (waste carbon soot particles (WCS) coated CP) and MS@CPWCS (CPWCS coated Melamine Sponge (MS)) are reported here...

The advent of organic molecules as inhibitors in the field of corrosion monitoring has been exponentially expanding in the past few years which enhanced the scope for innovation in polymers as potential corrosion inhibitors. The current research focused on the development of azomethine functionalised benzothiazole moiety containing four phenol-form...

Competitive corrosion inhibition performances of alkyl and acyl substituted 2-(2-hydroxybenzylideneamino)phenol derivatives as Schiff bases were analysed for protection of mild steels in corrosive 1 molL-1 HCl used in industrial acid-cleansing purposes employing potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). Th...

Competitive corrosion inhibition performances of alkyl and acyl substituted 2-(2-hydroxybenzylideneamino)phenol derivatives as Schiff bases were analysed for protection of mild steels in corrosive 1 molL⁻¹ HCl used in industrial acid-cleansing purposes employing potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). Th...

An alkyl and acyl substituted redox-active Schiff bases, namely, 2-(2-hydroxybenzylideneamino)phenol (Inh-1), 2-((2-hydroxyphenylimino)methyl)-4-methylphenol (Inh-2) and 2-((2-hydroxyphenylimino)methyl)4-methoxyphenol (Inh-3) were synthesized. Afterwards, its anticorrosion aspect for mild steels dipped into 1 molL−1 H2SO4 was explored by potentiody...

Fluoride and cyanide contamination in drinking water imposes detrimental impacts on human health above their permissible limits. Hence, the quantitative detection of these colourless water-soluble toxins has attracted attention. Even though a plethora of chemosensors have been reported so far for the detection of fluoride and cyanide from various m...

A versatile naphthalene-benzothiazole-based chemoreceptor (BTN) towards selective recognition of Zn2+ and Cd2+ is reported in this work. BTN exhibits chromogenic changes (colorless to pale yellow) in presence of Zn2+ in purely aqueous medium. It recognizes Cd2+ by fluorogenic response (non-fluorescent to blooming green emission). While for bio-haza...

Almond gum (AG) was studied as an economically and environmentally viable corrosion inhibitor in 1 M HCl on mild steel (MS). Studies such as gravimetric, NMR, FTIR, EIS, PDP, SEM/EDAX, UV–Visible, DFT and Monte Carlo simulation were performed to assess the potency of AG as a green inhibitor. Gravimetric study was done in the temperature range 30°C–...

An inimitable Schiff‐base chemosensor PMA (9‐anthracenecarboxaldehyde pentafluorophenylhydrazone) was premeditated and implicated with the aim of detecting F− and CN− in semi‐aqueous medium. Highly photostable, multichannel sensory probe, PMA (with 31 % quantum yield) exhibited amusing sensing efficiency towards F− and CN− by dint of colorimetric,...

A urea-functionalized chemoreceptor 1,5-bis(2,4-dinitrophenyl)carbonohydrazide (BDC) with versatile applications has been reported in this work. BDC displayed ditopic sensitivity toward toxic industrial pollutants Cu2+ and CN– from a purely aqueous medium. BDC has been structurally authenticated by ESI-MS, 1H-NMR, FT-IR, and SCXRD. It can undergo p...

A simple condensation of chitosan (from shrimp shells) and 4-hydroxybenzaldehyde was performed to yield bio-lubricant additive comprised of azomethine functional groups to be used with paraffin lube oil in industries. The synthesized Schiff base derivative of chitosan (SBC) additive was characterized using a CHN analyzer and FT-IR spectroscopy, and...

Small molecular probe has been synthesized and its response towards biologically significant ions like Zn2+ and F- with low detection threshold (Zn2+: 50 nM and F-: 3 μM) has been investigated in the present work. The recognition event has been appreciably utilized towards designing a biomolecular logic device. 1H-NMR, ESI-MS analysis suggest chemo...

Selective sensing of biothiols holds immense importance due to the adverse roles of abnormal concentrations of biothiols in several diseases, henceforth demanding widespread research for developing sensory receptor towards selective detection of biothiols. Herein the designed synthesis of a simple 3D porous coordination polymer, PCP-1 has been carr...

The flexible soft actuators of conducting polymers can directly convert electrical stimulus into mechanical motions, which can be used for robotics and biomimetic applications. Herein, an electro-responsive membrane actuator based on poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate), functionalized single-walled carbon nanotube was fabricate...

Luminescent phenanthrene‐naphthalene sulfone has been synthesized having phenanthrene and naphthalene as antenna center with an aim of fluorogenic in vitro detection of highly mutagenic NACs, which are hitherto less explored. The chemosensor could detect NACs selectively over NALs of which TNP detection is highly selective by a swing in fluorescenc...

Two luminescent MOFs, [email protected] and [email protected], have been reported herein, which are capable of selectively detecting 2,4,6-trinitrophenol (TNP), one of the potent organic water pollutants in the class of mutagenic explosive nitroaromatic compounds (epNACs). It is perceived that the d¹⁰-based Cd(II)-constituting MOF shows a better re...

With the aim to explore the effect of heteroatoms on corrosion inhibiting efficacy of structurally similar azomethine based organic molecules, 5-((furan-2-yl)methyleneamino)-2H-1,2,4-triazole-3-thiol (FMT) and 5-((thiophen-2-yl)methyleneamino)-2H-1,2,4-triazole-3-thiol (TMT) were synthesized and its corrosion inhibiting property were investigated b...

Three different bis-benzothiazole (BBT) derivatives namely 2,6-bis(2-benzothiazolyl)pyridine (BBTP), bis(2-benzothiazolylmethyl)sulphide (BBTMS), and 1,2-bis(benzothiazolyl)ethylene (BBTE) are synthesized and characterized. Corrosion mitigation performance of these bis-benzothiazole derivatives have been inspected for mild steel in aqueous 1 M HCl...

An inimitable urea-based multichannel chemosensor, DTPH [1,5-bis-(2,6-dichloro-4-(trifluoromethyl)phenyl)carbonohydrazide], was examined to be highly proficient to recognize CN– based on the H-bonding interaction between sensor −NH moiety and CN– in aqueous medium with explicit selectivity. In the absorption spectral titration of DTPH, a new peak a...

Herein, two Schiff base derivatives of vanillin and divanillin with 2-picolylamine, namely, 2-methoxy-4-((pyridin-2-ylmethylimino)methyl)phenol (compound A) and 3,3′-dimethoxy-5,5′-bis-((pyridin-2-ylmethylimino)methyl)-[1,1′-biphenyl]-2,2′-diol (compound B), respectively, were synthesized. Additionally, their adsorption characteristics and corrosio...

Almond gum (AG) was studied as an economically and environmentally viable corrosion inhibitor in 1 M HCl on mild steel (MS). Studies such as gravimetric, NMR, FTIR, EIS, PDP, SEM/EDAX, UV-Visible, DFT and Monte Carlo simulation were performed to assess the potency of AG as a green inhibitor. Gravimetric study was done in the temperature range 30 •...

The present work enlightens As(III) induced cleavage of spirolactam ring of a cleft shaped electronically enriched fluorochromogenic probe 3',6'-bis(ethylamino)-2-((2-hydroxy-5-methylbenzylidene)amino)-2',7'-dimethylspiro[isoindoline-1,9'-xanthen]-3-one (PBCMERI-23). The developed ‘easy-instant-economic’ luminescent probe instigates twofold optical...

‘Fluoride rich sludge’ can be defined as a semi-solid, dense left-over material (slurry), with very high content of fluoride. Genesis of fluoride rich sludge can be categorized into two types: i) as a by-product from various industrialized sectors viz. fertilizer plants, semiconductor industries, integrated circuit industries, coal power plants, li...

The present invention reveals the effectiveness of an undiscovered geomaterial, the blackish white china clay (BWCC), as an adsorbent material in the defluoridation of groundwater and the process thereof. The use of BWCC, available in Birbhum, West Bengal, for removal of excess fluoride of groundwater is found to be cost effective, non-toxic, and e...

Iron and its alloys are commonly used materials in petroleum refining facilities. However, poor corrosion resistance is always a disturbing problem for these industries. Herein, we demonstrated the utility of two pyrazoline derivatives (PYRs), namely, 2-(4-(4,5-dihydro-3-(4-methoxyphenyl)-1H-pyrazol-5-yl)phenoxy)acetic acid (PYR-1) and 2-(4-(4,5-di...

Palmitic acid imidazole (PI) was synthesized in microwave reactor. The obtained product was explored to reveal the mild steel's corrosion inhibiting property in 1 mol L−1 H2SO4. It gave maximum inhibition efficiency of 90% at ambient condition. Addition of little amount of KI (6 × 10−3 mol L−1) into 1× 10−3 mol L−1 of PI further increased its effic...

Detection and Mitigation of Fluoride (a geogenic contaminant) from groundwater: A complete solution