Shibu G Pillai

• Ph.D
• Professor at Nirma University

Patients with psychosis around the world are routinely prescribed anti-psychotic medications. Amisulpride (AMI) is one such medication. In order to detect cases like drug overdose, drug abuse, or intentional poisoning, simple, selective and sensitive probes are required. In the present work, we have synthesized a fluorescent probe (CRSA) for detect...

Treatment of chemical industry wastewater is a challenge for the world to save the environment. There are many processes developed for the treatment of industrial wastewater. Very simple to highly complex methods are invented by different researchers. These methods can be compared on various aspects such as their performance on wastewater, ease of...

The detection of trace amounts of sulfosulfuron, a pesticide of increasing importance, has become a pressing issue, prompting the development of effective chemosensors. In this study, we functionalized cyclotricatechylene (CTC) with propyl-phthalimide due to the presence of electronegative oxygen and nitrogen binding sites. Our optimized ligand dis...

Starch is known most abundant carbohydrate on the earth. Native starch is difficult to use, so modification is needed. Out of so many techniques, crosslinking is one of the most widely used techniques. Crosslinked starch shows a significant variation in the properties of the native state. There are many crosslinking reagents reported by many resear...

In the present work jatropha, palm, and karanja-based biodiesel and diesel blends, as well as biodiesel diesel and butanol blends, were studied. 112 density data for biodiesel-diesel blends in the temperature range of 30–65 °C were generated. 651 data for viscosity for these blends were generated in the temperature range of 25–65 °C. Blends with bu...

The photovoltaic investigation of novel and efficient dye-sensitized solar cells is discussed in this paper. Ruthenium-based synthetic dye (N3) is used as a sensitizer. A less toxic alternative is suggested for toxic indium-based glass substrates by using aluminum-doped zinc oxide (AZO) and fluorine-doped tin oxide (FTO) as charge collectors. Moreo...

The beguiling properties of functionalized calix[4]pyrrole has garnered a lot of attention due to its selective and specific sensitivity towards biomolecules and cations, it behaves as a frontline contender for recognition moieties and their eventual applications as fluorogenic sensing agents have received increasing interest. The binding propertie...

Carrier scattering rates and transport properties such as electron effective mass and resistivity are calculated for Mn doped armchair graphene (AG) via polar acoustical phonon (piezoelectric) scattering under high electric field and different doping concentrations. It is observed that the electron effective mass reduces with respect to AG on manga...

The paper explored the mechanism of working of dye sensitizers for the improvement of efficiency of environmentally benign dye‐sensitized solar cells (DSSC). The identified natural dyes namely anthocyanin (A), betalain (B) and chlorophyll (C) were extracted from Roselle (Hibiscus sabdariffa L.), spinach (Spinacia oleracea ) and beetroot (Beta vulga...

In this work, the response surface methodology (RSM) has been applied to optimize the process parameters in the preparation of polymer composite which is used as an electrolyte in dye sensitized solar cell (DSSC). Optimisation of two different parameters such as percentage doping of vanadium pentoxide and conductance of the polymer composite has be...

A novel series of 2,4,6-trimethoxy substituted chalcones have been prepared by the Claisen-Schmidt condensation. Firstly, synthesized 2,4,6-trimethoxybenzaldehyde from 3,4,5 trimethoxy benzene and then condense the obtained 2,4,6-trimethoxybenzaldehyde with substituted acetophenone to get different chalcones. The structural interpretations of newly...

The paper demonstrates the selection of the substrates to be used for photoanode and counter electrode for dye sensitised solar cells (DSSC). The cells were made utilising mixed electrolyte, mixed natural dyes and newer approach of using varying glass substrates coated with three different transparent conductive oxides (TCO) like indium doped tin o...

This work demonstrates the PV study of dye sensitised solar cells by fabricating the (PV) cell using the ITO, FTO and AZO glass substrate. Dyes used for the fabrication were extracted from beetroot and spinach and a cocktail dye by mixing both of the dyes was also prepared. Similarly the three dufferent electrolytes used were iodide-triiodide coupl...

As the impact of fossil fuels is evident with the climate changes, world is now fast moving onto realizing renewable energy sources for their regular life where solar energy plays a vital role. In this paper three electrolytes are compared which are used to prepare dye sensitized solar cells (DSSCs) with a polymer polyaniline (PANI). The three elec...

Solar energy is a highly abundant renewable source and in this age of depleting fossil fuels, its harnessing is paramount, which has led mankind to discover organic solar cells. Discovered and researched in the 21st century, this field offers valuable hope for resolving future energy requirements. The emergence of polymer solar cells and their work...

Gas sensor devices normally use metal oxide semiconductors requiring high operating temperature, due to which the sensor often suffers from instability, response variation, poor selectivity and low sensitivity. Due to these limitations, intrinsically conducting polymers, such as polyaniline (PANI), polypyrrole, polythiophenes and their derivatives,...

Polymeric materials have been premeditated to resist degradation. Keeping in mind, the fact that conventional polymers have to be replaced to mitigate environmental losses and lower the dependence on crude oil for polymer production, this chapter reviews biodegradable microbial polyesters on the basis of their source of production, properties and t...

In today’s world where fossil fuels are on the verge of depletion, solar energy offers a much valuable path to harness its abundance, which has led to the discovery of third gen organic solar cells. The paper reports a detailed methodology for the preparation of polymer based dye sensitized solar cell (DSSC) using polyaniline (PANI). The cells were...

Authors: Neha Patni, Hardik Panchal, Mayur Padharia, Keval Shah and Shibu G. Pillai, Recent Advances in the Fabrication of Polymer based organic Solar cell in International Conference on Energy and Infrastructure Management ICEIM, on 18-19 February 2016, pp.474-483, ISBN:978-93-85777-26-4 , Excel India Publishers. Won the best paper award for the...

Chemical sensor is a device that transforms chemical information, ranging from the concentration of a specific sample component to total composition analysis, into an analytically useful signal. There has been a strong demand for producing highly selective, sensitive, responsive, and cost effective sensors. Nanostructures, such as nanowires and nan...

Photovolatiac solar cells, which harvest energy directly from sunlight, may satisfy future energy requirements, but these devices are currently too expensive. Polymer solar cell (PSC), on the other hand, are cheaper to produce than conventional inorganic solar cells. Indium tin oxide (ITO) is the material-of-choice for transparent conductors in any...

Development and modernization has brought about a huge increase in the production of all kinds of commodities, which indirectly generate waste. Plastics have been one of the materials because of their wide range of applications due to versatility and relatively low cost. They are incredibly versatile materials; they are inexpensive, lightweight, st...

The synthesized derivative of calix[4] resorcinarene-hydroxamic acid is reported for the determination of cerium (IV) by spectrophotometrically from environmental samples in the presence of numerous interfering ions. The extract has been subjected to the determination of Ce(IV) by uv-vis spectrophotometry and inductively coupled plasma atomic emiss...

Today, photosensitized reactions are of much more importance in the field of photochemistry. The photochemistry of different compounds by the route of photosensitization technique is being studied extensively with considerable interest in recent years due to the interesting aspects of photosensitization of different compounds. In this paper, differ...

Today, the critical and burning issue in pharmaceutical world is the impurities in bulk drugs and formulations. Nowadays the guidelines for the permissible limits of impurities in either API or any finished products are getting more and more stringent. Even the pharmacopoeial limits for different types of impurities in their monographs of drug subs...

The synthesized p-carboxy-N-phenyl-calix[4]resorcinarene-hydroxamic acid PCNPC4RAHA is reported for the extraction and preconcentration of V(V) from environmental samples in the presence of numerous ions. The extract has been subjected to the determination of V(V) by uv-vis spectrophotometry and inductively coupled plasma atomic emission spectromet...

Excessive consumption of fossil fuels, particularly in large urban areas, has resulted in generation of high levels of pollution during the last few decades. All petroleum-based fuels can be replaced by renewable biomass fuels such as bioethanol, bio-diesel, bio-hydrogen, etc. Bioethanol is an attractive alternative fuel because it is a renewable b...

Growth demands energy. India is the world’s fifth largest consumer of energy, and by 2030 it is expected to become the third largest, overtaking Japan and Russia. India has only 0.4 percent of the world’s proven oil reserves. It is also projected to run out of coal, its primary source of energy, in forty years. Its domestic natural gas reserves are...

Across the world, the analytical capabilities of mass spectrometry and its ability to accurately identify and quantify the minute amounts of compounds in complex sample matrices such as blood, urine and oral fluid are studied nowadays. Innovative mass spectrometry methods are being developed in place of conventional methods for a wide variety of re...

The novel eight armed calix[4]resorcinarene bearing eight hydroxamic acid groups have been synthesized by reacting octa functionalized calix[4]resorcinarene carbonyl chloride with p-carboxy- N-phenyl hydroxylamine at low temperature. This compound is characterized by elemental analysis, FT-IR, and 1H-NMR.

A new octa functionalized calix[4]resorcinarene bearing eight hydroxamic acid groups (OFCHA) has been synthesized and its analytical properties have been investigated. To elucidate the structure of the compound, elemental analysis, FT-IR and 1H NMR spectral data have been used. The compound showed high affinity and selectivity for vanadium(V) in pr...

Four new ‘upper rim’ azocalix[4]resorcinarene have been synthesized by coupling calix[4]resorcinarene with different diazotized aromatic compounds of sulphanilic acid, anthranilic acid, o-aminophenol, and p-aminobenzoic acid. The prepared compounds were characterized based on m.p., elemental analysis, FT-IR, 1H-NMR. These dyes have been used for th...

A liquid-liquid extraction and preconcentration of lanthanum (III) with a calix[4]resorcinarene bearing eight hydroxamic acid groups (C4RAHA) is described. Its analytical properties were investigated, and showed high affinity and selectivity towards lanthanum (III) in the presence of large quantities of associated metal ions. Quantitative extractio...

In the present paper, solid-phase extractive preconcentration and separation of lanthanum(III) and cerium(III) using calix[4]arene-o-vanillinsemicarbazone immobilized on a polymeric matrix, a Merrifield peptide resin, is proposed. The diamino derivative of calix[4]arene was first diazotized and coupled with o-vanillinsemicarbazone to obtain a new “...

A new method for liquid-liquid extraction, separation and preconcentration of cerium(IV) with a calix[4]resorcinarene acid derivative [C4RAHA] is reported. Cerium was extracted at pH 9 in ethyl acetate and recovered from monazite sands in the presence of thorium, uranium, lanthanum and large number of cations and anions. Cerium(IV) forms yellow col...

A new chelating polymeric sorbent is developed using Merrifield chloromethylated resin anchored with calix[4]arene-o-vanillinsemicarbazone for simultaneous separation and solid phase extractive preconcentration of U(VI) and Th(IV). The "upper-rim" functionalized calix[4]arene-o-vanillinsemicarbazone was covalently linked to Merrifield resin and cha...

Calix[4]arene based polymer supported chelating resin 8 has been synthesized by covalently linking calix[4]arene‐o‐vanillinthiosemicarbazone via its ‘lower rim’ to Merrifield resin and was characterized by FT‐IR, 1H‐NMR and elemental analysis. Resin 8 was competently used to separate and preconcentrate toxic metal ions Cr(VI), As(III) and Tl(I) in...

A new calix[4]resorcinarene bearing eight hydroxamic acid groups (C4RAHA) has been synthesized and characterized by FT-IR, 1H-NMR and elemental analysis. Its analytical properties were investigated, and showed high affinity and selectivity toward thorium(IV) in the presence of large quantities of associated metal ions. Thorium(IV) was extracted fro...

A solvent extraction separation of uranium, in the presence of thorium, cerium and lanthanides with a new calix[4]resorcinarene bearing eight hydroxamic acid groups (C4RAHA) is described. Quantitative extraction of uranium is possible in ethyl acetate solution of C4RAHA at pH 8.0. The lambda(max) and molar absorptivity (varepsilon) for uranium is 3...

A very stable calixarene-based polymeric chelating resin has been synthesized by covalently linking calix[4]arene-o-vanillinthiosemicarbazone through its lower rim to Merrifield resin. It was characterized by FT IR, 1H NMR and elemental analysis. The resin was efficiently employed to separate and preconcentrate toxic metal ions such as Cu(II), Cd(I...

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