Modern day research focuses on the development of greener and eco-friendlier protocols to fabricate biologically relevant targets with minimal waste generation. C-C bond formation reactions are prime importance in this regard. In a typical photocatalytic hydrogen evolution reaction, three components used, viz, catalyst, photosensitizer, sacrificial amine donor. Among these, photosensitizer donors wasted at end reaction. Considering these drawbacks, work, we have developed methodology...

Classical Newman Kwart rearrangement requires harsh reaction conditions (high temperature), resulting in substrate decomposition/side product formation, limiting the scope to electronically deficient substrates stabilize anionic transition state thermal processes. It becomes imperative develop amicable protocols for this reaction. The immense potential of nanomaterials as dynamic heterogeneous catalysts, coupled with photo-mediated transformations, provides a unique opportunity tackle...

The chemically exfoliated 2D-MoS₂ has a mixture of 1T (metallic) and 2H (semiconducting) phases.

ConspectusWith the growing awareness of need to have greener, economical, and sustainable alternatives in synthetic chemistry, scientific community has come up with strategies that are based on materials general nanomaterials particular. Nanomaterials can be tuned obtain desired properties. These methods include modification surface by functionalization, controlling defects at edge basal plane, doping metals, other nanomaterials, or heteroatoms. At lower dimensions, they bear an enhanced...

Transition-metal dichalcogenides (TMDs) show a diverse range of properties and are highly promising for organic transformations owing to their large surface-to-volume ratio that confers good selectivity sensitivity by increasing the number active sites. Herein, we have prepared semiconducting (2H) mixed-phase (2D) TMDs mechanical chemical exfoliation, respectively. The materials been characterized various forms spectroscopy microscopy. Further, explored potential four classes participate in...

Phosphate detection has garnered widespread attention due to its biological and environmental impact. Among several optical techniques, time-resolved fluorescence (TRF) provides a sensitive way for the discrimination of analytes in complex mixture as it exhibits less interference from background, therefore providing high signal-to-noise ratio. The sensitization rare earth metal (REM) ions by semiconducting quantum dots (QDs) can help former overcome drawback low absorption coefficient,...

A miniaturized butterfly-shaped microstrip patch antenna is proposed for unlicensed millimeter wave band applications. The overall dimensions of the are (20 × 18 1.6) mm3 or (3.93 3.54 0.314)λ03 with rectangular defected ground structure, which etched on plane to improve its performances. This configuration achieved an ultra-wide bandwidth (UWB) 7 GHz (26%) and 22 (37.9%) radiation efficiencies 92% 61%, covering frequency range from 19.3–25.2 48–70 GHz, respectively. reflection coefficient...

The first Ir-catalyzed enantioselective β-allenylation of 2-hydroxynaphthoquinones is developed. β-allenylic lawsone derivatives displayed remarkable potency against Gram-positive MRSA strain and low toxicity mammalian cell lines.

A new ultra wide band (UWB) proximity fed gap-coupled microstrip patch antenna is proposed in this paper. The designed using Christmas tree-shaped with additional slot on the and ground. resonate at three ultra-wide bands single impedance bandwidth of 20.82 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">%</sup> , 28.43%, 14.83 % 8.23% respectively.

This paper presents the design and simulation of dual band Key shaped microstrip patch antenna exhibiting wide operating frequencies for C/X applications. The proposed is designed using FR4 (flame retardant-4) substrate. impedance bandwidth at lower (7.02-8.45GHz) 18.48% upper (10.83-11.71 GHz) 7.80%. line feed technique defected ground structure (DGS) used in this design. performance analyzed term bandwidth, gain, return loss, radiation pattern, VSWR, efficiency, group delay axial ratio....

The article consists of a novel compact disc patch antenna with S-shaped slot.It is proposed that it operates on multiband covering the applications in WiMAX, WLAN, X-bands and ITU frequency.The behavior wide band (6.091-7.27) achieved, mainly due to appropriate placing two shorting pins, slots circular material substrate used.The designed at resonating frequencies 2.63 GHz, 3.12 4.52 6.68 GHz 8.32 respectively.It suitable for ITU.The geometry then simulated using available IE3D software...

An evolved dual-band 2×1 Microstrip Patch Array Antennas are designed with rectangular slot defected ground structure. The proposed antennas used two different substrates FR4 and RT Duroid 5880 third one is the same shape half size of substrate antenna ( A1 or A2). dimensions (A1, A2) A3 taken as (50×40×1.6) mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> (25×20×1.6) respectively. antenna- resonate at 3 GHz 17 corresponding peak gain...

This paper presents a microstrip patch antenna for WLAN and radio astronomy services (RAS). By embedding trapezoidal two rectangular notches with sorting pin, the designed resonates at distinct resonating frequencies of 4.8 GHz 5.8 GHz. It is shown that proposed has good gain radiation characteristics.

A novel and small size (900 mm2) aperture coupled microstrip patch antenna is proposed in this paper. Two substrates (FR4 Bakelite) are used design to enhance the parameters. The parameters of return loss, gain, VSWR, radiation pattern, efficiency group delay analyzed by electromagnetic simulation tool (HFSS ANSYS). resonates multiple bands frequency range (22.2-62 GHz) with one wideband UWB operation. Impedance bandwidth 14%, 48%, 9% 4.9% gain 7.6 dBi, 12.7 8.2 dBi 5.1 observed (22.2-25.7)...

An ultrawide band partial ground miniaturized rectangular shape microstrip patch antenna is investigated in this paper. The size of the proposed 17×10×1.6 mm3 and excited by line feed which operates for C X- band. In article we have compared variation output changing thickness copper from 35μm 70μm. design simulated Ansoft’s HFSS13v based on finite element method then fabricated using wet etching finally measured mountain reflectometer R140 version. performance shaped analyzed various...

A novel stacked double U, angular ring shaped MIMO antenna is designed using DGS, and a pair of balanced shorting pin proposed for C, X, K-band applications. The aim this design to enhance the bandwidth by different techniques in compact MSA. on an FR4 substrate with permittivity 4.4 used dimension 10×10 mm2 two-microstrip line one coaxial feed as feeding mechanism. Two asymmetrical antennas are air gap thickness 1.6mm that exhibits low correlation coefficient; mutual coupling refection...