A rhodamine-based smart probe (RHES) has been developed for trace-level detection and discrimination of multiple cations, viz. Al3+, Zn2+, Cd2+, Hg2+ in a ratiometric manner involving photo-induced electron transfer-chelation-enhanced fluorescence-fluorescence resonance energy transfer processes. The method being very fast highly selective allows their bare eye visualization at physiological pH. optimized geometry spectral properties RHES its cation adducts have analyzed by time-dependent...

The detection of benzene and its analogues are extremely important but difficult without using expensive analytical instruments. present work reports the aromatic hydrocarbons, such as benzene, toluene, isomers xylene, quartz crystal microbalance sensor. surface a silver-coated was coated with simple solution drop coating method thermally polymerized in an inert atmosphere for formation sensing film. polymer synthesized by copolymerization optimum ratio styrene, divinylbenzene, tung oil at...

An amide-based smart probe (L) is explored for nanomolar detection of Mo(VI) ion in a ratiometric manner, involving hydrogen-bond-assisted chelation-enhanced fluorescence process through inhibition photoinduced electron transfer process. The recognition associated with 17-fold enhancement and confirmed by single-crystal X-ray diffraction the resulting complex (M1). Further, M1 selectively recognizes arsenite green emission their adduct (C1) an 81-fold enhancement. Interestingly, dihydrogen...

Abstract Herein we developed a simple, cost effective, electrochemical sensor based on nanosized copper telluride (nps‐CuTe) for simultaneous detection of epinephrine (EP) and uric acid (UA). Voltammetric responses suggests dramatical improvement electrocatalytic properties both molecules by incorporating CuTe nps into unmodified graphite paste electrode (bare GP). Differential pulse voltammetric (DPV) measurement depicts large potential separation 128 mV between EP UA, allows their...

A low-cost portable gas sensing system for the detection of eugenol in clove oil is described this article. The sensor has been developed on a molecularly imprinted polymer (MIP) modified quartz crystal microbalance (QCM) platform. two parts: 1) MIP-QCM and 2) signal measuring unit, which includes oscillator (10 MHz), frequency counter (ATmega328P microcontroller unit), liquid display (LCD), data storage unit. 10-MHz AT cut was coated with synthesized solution optimum ratio styrene, methyl...

Citral, a significant aldehyde monoterpene found in various kinds of lemongrass (Cymbopogon sp.), is used as an aromatherapy tool to decrease tension, anxiety, and depression, well fragrance soaps other personal care items. Moreover, recent research has revealed that this substance numerous important health benefits, including anti-oxidant, antiinflammatory, anti-hyperglycemic, anti-diabetic qualities, mention few. Citral the major component essential oil (LGEO). The percentage citral...

Abstract Two rhodamine derivatives derived from B, salicyaldehyde (L) and benzaldehyde (R1) having ether spacer have been prepared characterised by spectroscopic techniques. One of them is very efficient to detect picric acid (PA) colorimetric fluorescence method while the other serves as model compound unveil sensing mechanism. The probe recognizes PA through hydrogen bond assisted Chelation Enhanced Fluorescence (CHEF) process in a ratiometric manner aqueous‐methanol (4/1, v/v). silica...

Citronella oil derived from the leaves and stems of various Cymbopogon species (lemongrass) finds widespread application in soap, candles, incense, perfumery, cosmetic, flavouring industries worldwide. It is also used as insect repellent non-toxic bio pesticide. The present study employs a QCM-based sensor to discriminate different samples citronella essential depending on content citronellal each sample. Citronellal main component has highest concentration oils. Aside citronellal, contains...

The essential oil extracted from the oregano (Origanum vulgare) is rich in phenolic compounds that have strong antioxidant and antibacterial properties. Carvacrol major component of oil. current study describes use a molecularly imprinted quartz crystal microbalance (QCM) sensor to detect carvacrol For formation sensing film, surface with silver electrode was modified by simple drop coating synthesized polymer solution thermally polymerized at 95°C an inert atmosphere. copolymerization...

Detection of formaldehyde is extremely important considering its detrimental health hazards. It extensively used as a potent preservative in different consumables like mushrooms, fish, etc. Although there are several methods to detect formaldehyde, developing robust and accurate technique always challenging. Here in, reliable quartz crystal microbalance (QCM) based detection presented where polyethylene glycol (PEG-400) the prime sensing material. The developed sensor has achieved wide...

A detailed theory for enhanced optical absorption in thin silicon with a distribution of nanovoids has been worked out this paper. It is demonstrated that significant enhancement the effective coefficient (by factor about two to more than four) Si layer can be achieved by optimizing dimensions and nanovoids. In work, modelled taking into account diffraction light nanocrystallites between voids as well scattering voids. This modelling supposed applicable any semiconductor film having since...

An azine-based molybdenum (Mo(VI)) complex (M1) is exploited for selective detection of thorium (Th(IV)) ions through a metal-ion displacement protocol. Th(IV) displaces Mo(VI) from M1 instantly leading to the formation complex, having orange-red emission. Consequently, red shift emission wavelength along with 41-fold fluorescence enhancement observed. This unique method allows as low 1.5 × 10-9 M. The by established spectroscopic studies and kinetically followed stopped-flow technique....

Abstract Two types of topological indices, Wiener and Hosoya three classes reciprocal graphs (namely , ) have been shown to be expressed in terms the number pendant vertices (n). The index is analytical form whereas either by recurrence relations or directly matrix products for which a facile computer program can written. It has also that obtained form. Acknowledgement Authors are thankful University Grants Commission, New Delhi, granting financial assistance extended through DSA project...

A galvanic technique for the deposition of ZnO thin films is reported. The depositions were carried out on p-type single-crystal silicon substrates at room temperature, from a solution ZnSO(4), where Zn rod acted as sacrificing anode and p-Si was cathode. by this method pH sensitive, between 4 5 found to be optimum film deposition. This simple, inexpensive can temperature. X-ray diffraction (XRD), scanning electron microscopy (SEM) atomic force (AFM) studies revealed nanocrystalline...