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The present study aims to produce nanocomposites of silica based organosilane as sensitive and selective fluorescent sensor for the recognition of 2,4 dichlorophenoxyacetic acid (2,4-D). Hydrazone tethered triazole functionalized organosilane has been synthesized by the condensation reaction of 4-hydroxybenzaldehyde and phenyl hydrazine followed by Cu(I) catalysed cycloaddition of azide with alkyne. The prepared compound has been further grafted over silica surface and the synthesized materials were characterized by FT-IR, NMR (

The present article reports the synthesis and structural characterization of a triazole appended isatin linked silane-based sensor using a highly efficient click chemistry approach. The yellow-coloured solution of the highly selective chemosensor turned red in the presence of Ag+ ions and a red shift in the absorption spectra was also observed during the addition of these ions. IR spectroscopic studies support the metal ion binding with organosilanes in the cavity created by the carbonyl group of isatin, the nitrogen atom of the triazole ring and the Si–O bond of silane. Furthermore, the sensing application was enhanced by the immobilization of the ligand on the surface of iron oxide silica nanoparticles and the resulting silica surfaced nanocomposites were characterized using various techniques. B–H plots and calibration curves were employed to measure the association constants and limits of detection, respectively, of the synthesized ligands and their magnetic nanoparticles. The nanohybrids demonstrate a greater binding potential to Ag+ ions. In addition, the synthesized organosilanes were investigated for cytotoxicity using the MTT assay, and the antioxidant activity was measured by decolouration of ABTS˙+.

The present work reports for the first time the preparation of aryl–alkyl ether functionalized silatrane for the selective recognition of Al3+ ions using the cyclic voltammetry technique. The synthesis was achieved through a condensation reaction followed by transesterification methodology to obtain organosilatranes in good yields. The prepared compounds were well characterized by IR, NMR (1H and 13C) and mass spectral analysis and the structure of one of the molecules was further confirmed by X-ray crystallography, which showed a triclinic crystal system with a P space group. The electrochemical behaviour was studied by employing square wave voltammetry (SWV) using a gold electrode to investigate the receptor action of the synthesized organosilatranes. A detection limit of 48.9 nM and competitive binding results suggest the significant receptor potential of organosilatranes for the detection of Al3+ ions. Moreover, the real time application of the prepared sensors was confirmed by the determination of Al3+ ions in tea leaves.

The present article includes the generation of aromatic Schiff base tethered organosilatranes via two step synthetic pathways starting from anthracene-10-carbaldehyde and 1H-indole-3-carbaldehyde. The synthesis was achieved by employing condensation reaction followed by transesterification methodology. The prepared organosilatranes containing aromatic schiff based ligands were structurally authenticated using spectroscopic techniques such as FT-IR, NMR and mass analysis. The prepared compounds were also scrutinized for in silico physiochemical properties via Molininspiration and ADMET software and the results revealed their good biological potential for drug discovery.

This article presents the design and synthesis of a new series of N-heterocyclic unsymmetrical organosilatranes starting from carboxaldehydes and [3-(2-aminoethylamino)propyl]trimethoxysilane. The molecular structures of the desired organosilatranes were confirmed by various characterization techniques such as elemental analysis, FTIR, NMR (1H and 13C) and mass spectroscopy. The prepared compounds were evaluated for their cationic chemosensing activities and the recognition studies show considerable variations in the intensity and λmax values of absorption and emission spectra on addition of Sn2+ ions. Further immobilization of N-heterocyclic unsymmetrical organosilatranes was done on a magnetic silica surface and the resultant nanohybrids were identified by numerous analytical techniques viz., FTIR, TGA, XRD, SEM, VSM and BET. The comparative detection studies of the nanoparticles with silatranes showed better Sn2+ ion binding ability. Moreover, the pharmacokinetic profile of the synthesized compounds was analysed using MOLINSPIRATION and ADMET software and it gave auspicious results that triggered the investigation of the cytotoxicity and total antioxidant activity (TAA) of these molecules.

The present work explores the facile synthesis of antipyrine-based triazole-linked organosilanes (3a–3f) by employing the click chemistry methodology; the structure of one of the organosilanes 3(e) was authenticated using the X-ray crystallographic technique. The synthesized antipyrine-tethered organosilanes were surveyed for the detection of metal ions using absorption spectroscopy, and it was observed to show sensitivity for Sn2+ ions. The sensing probe 3(e) showed significant selectivity for Sn2+ ions with a limit of detection value of 6.71 × 10−5 M and a stoichiometry of 1 : 1, as confirmed by the Job's plot method. Moreover, there was no significant interference observed with other tested cations, thereby making it a highly selective receptor for the recognition of Sn(II) ions. Furthermore, organosilane 3(e) was anchored onto the nanosurface of Fe-based magnetic silica, and the obtained nanocomposites were characterized using various analytical and spectroscopic techniques. Imperatively, the recognition studies of hybrid nanoparticles demonstrated enhanced detecting capability towards Sn(II) ions with an even lower value of limit of detection. Moreover, in this study, we examined the pharmacokinetic profiles of molecules using MOLINSPIRATION and ADMET toolkits for the sake of efficient drug discovery, which drove us to scrutinize these compounds for anti-oxidant activity and cytotoxicity. The total antioxidant activity (TAA) results indicate that organosilanes are excellent candidates for radical scavenging. TAA values for 3b, 3c, 3d, 3e and 3h are 3.34 ± 0.41, 2.98 ± 0.39, 3.55 ± 0.44, 3.09 ± 0.39 and 2.15 ± 0.41, respectively.

N-Heteroaryl organosilocanes-based chemosensors have been synthesized for the recognition of copper metal ions with high selectivity. The synthesized compounds (3a–3c) were well characterized by using various spectroscopic techniques such as IR, NMR, TGA, CHN analysis and mass spectroscopy. The detection limit for the chemo-sensing study was determined to be 0.0079 ppm with flourimeteric detection, which is below the WHO guidelines. The shuffling of electron density due to strong binding of the receptor with copper generated a coordination complex which was recognized in the absorption and emission spectrum. The prepared organosilocanes were also used in biological cell lines to estimate the total antioxidant capacity and cytotoxicity activity.

A new series of ester appended organosilatranes (5a–f) were developed for the specific and selective detection of Cu2+, Hg2+ and Pb2+ and were well characterized by various spectroscopic techniques. The newly synthesized silatranes (5a–f) were appraised for heavy metal ion binding properties using UV-vis and photoluminescent spectra. In addition the stern volmer plot confirmed the quenching phenomenon on addition of Cu2+, Hg2+ and Pb2+. Interestingly, the detection limit of 5a-f with Cu2+, 5b with Hg2+ and 5d with Pb2+ is 1.07–3.56 µM, 1.43 and 1.65 respectively. In a nutshell, the present article provides the cost-effective and promising platform for detection of these ions.

The present work aims at the synthesis of γ-propylsilatrane, possessing 2,5-dimercapto-1,3,4-thiadiazole (H2dmtd) moiety tethered to γ- position of propyl chain derived from γ-chloropropylsilatrane via nucleophilic substitution of chloro group with monoanionic Hdmtd−. The linkage of 2,5-dimercapto-1,3,4-thiadiazole with γ-methylene carbon of propyl chain through N atom was confirmed from spectroscopic studies (1H and 13C NMR) elemental analyses, mass spectrometry and thermogravimetric analyses. UV-Vis spectroscopy, coupled with cyclic voltammetry was used to investigate the receptor action of the silatrane. The successful recognition ability of the synthesized molecule towards acetate, thioaceate and lead ions can be attributed to the presence of N-H and C=S system.

The attention of current work was on the fabrication of effective nanoadsorbent of hydroxyapatite (HAp) for the controlled release of atrazine (ATZ) formulation. The ATZ-HAp complex (ATZ@HAp) was able to inhibit the growth of Brassica sp. under in situ conditions. This developed methodology aspires to cease the agricultural runoffs of ATZ applied with the HAp adjuvant and ensure their effective functioning. The efficacy of the protocol was mainly accomplished by adsorbing ATZ over the surface of HAp NPs that restricted its premature runoff and promoted the prolonged herbicidal efficiency. The influence of fundamental parameters i.e., HAp dose, ATZ dose and initial pH on the adsorption process was investigated systematically. The suitability of ATZ@HAp complex for real world application was adjudged after proofing its toxicological behaviour and its role in Zea mays plantations. The complex was found to be non-toxic and nurturing due to its phosphate rich nature. Further investigations of ATZ@HAp complex and its effect on the non-target species will help in establishing an effective framework for their commercial use in agricultural practices.

A single step Cu (I) assisted click silylation reaction had been used for the synthesis of novel Schiff based 1,2,3-triazole bridged silatrane (SBTBS)-scaffolds (5a-5f) using polyfunctionalised Schiff based 1,2,3-triazole bridged organotriethoxysilanes (SBTBOTS) (4a-4f) as precursors. These compounds were synthesized in excellent yields using an economical, simple and biocompatible synthetic procedure and their structures were characterized by various spectroscopy methods such as IR, NMR (1H and 13C) and elemental analysis. The presence of different pharmacologically active segments into a single triazole unit can result into impressive achievement in their bioactivity. So, antibacterial studies of the silatranes (5a-5f) were also carried out and it was observed that all the compounds showed potential antibacterial activity. The results also indicate that activity of compound 5f is even comparable to the standard drug, cefepime.

The synthesis of different Schiff base substituted silatranes (1c–4c) was carried out from the corresponding organotrimethoxysilanes (OTMS) (1b–4b) under anhydrous atmospheric conditions. The title compounds were scanned by spectroscopic analytical studies like NMR (1H, 13C) and IR which confirm their formation. The fluorescence studies performed indicate that two of the silatranes (1c and 4c) can act as ‘dual–ion fluorescent sensors’ selectively for Mn2+ and Fe3+ cations. The structural arrangement of these silatranes allowed the metals to bind and form five/six membered stable ring which is not possible in non-active silatranes (2c and 3c). Antibacterial studies of silatranes were also performed which produced much better results than already reported cefepime.

A triazole tethered chemo sensor molecules with the capability of sensing cations have been synthesized by coupling two sensor based alkynyl indole schiff base unit to azide. The hybrid networks were able to donate electron via azomethine linkage, traizole ring and indole motif to bind copper and nickel effectively. Such indole based hybrids would have potential applications in biological systems. Indole traizoles (In-Tz) were synthesized under microwave irradiation with auto generated pressure (at 60 °C) and characterized by 1H NMR, 13C NMR, Mass and FTIR spectroscopy, thin-layer chromatography (TLC) and elemental analyses. The fabricated sensor exhibited higher sensitivity, large-dynamic concentration ranges and long term stability towards In-Tz conjugated copper and nickel complex for selective Cu2+and Ni2+sensor. The calibration plot is linear (r2: 0.9895, r2: 0.9808) over the large Cu2+ ions and Ni2+concentration ranges (1.0 µM). This novel effort has initiated a well-organize way of efficient cationic sensor improvement with triazole for heavy metallic pollutants in environmental and health-care fields in large scales.

The present article incorporates synthesis, photophysical and complexation studies of new series of pyridine tethered Organosilicon derivatives tailored via click methodology. The synthesized compounds were well characterized by using IR, NMR (1H and 13C) spectroscopy and Mass spectroscopy. Furthermore, the selective binding of Organosilane with Hg2+ ions was substantiated by UV–Vis’s absorption and fluorescence spectra analysis when examined for the recognizable ability towards numerous transition metal ions. Moreover, a convention for immobilizing Organosilane (5b) over the surface of magnetic silica nanoparticles has also been discussed. The resulting organic–inorganic hybrid nanoparticles (H-NPs) were distinguished by various physicochemical and analytical techniques and these nanocomposites also showed great fondness towards Hg2+ ions with LOD value of 4.2 × 10−7 M whereas organosilane shows a value of 6.3 × 10−6 M. Quantum mechanical calculations were performed for the justification of geometry and stability of the complex using DFT at B3LYP in addition with LanL2DZ basis set. Pharmacokinetic investigation of the prepared compounds was additionally examined utilizing MOLINSPIRATION and ADMET programming which gave promising outcome.

In the present article, we have reported the synthesis of chemosensor based on pyrene functionalized triazole linked organosilane by employing the condensation and 1, 3 dipolar cycloaddition reaction. This chemosensor showed its selectivity and sensitivity towards Ce3+ ions in comparison to other metal cations. The prepared receptor and its complex with selective cation, Ce3+ ions were characterized using spectroscopic techniques such as CHN analysis, FT-IR, theoretical studies, 1H and 13C NMR and mass spectroscopy. The recognition studies were done in methanol: water (7.5:2.5) solvent system. The obtained limit of detection for the present probe was as low as 2.00 ppm and 1:1 stoichiometry of complex formation between Ce3+ ions and organosilane was suggested by B-H graph and Job's plot.

In the current study, five isatin hydrazone schiff base linked acetylinic scaffolds have been synthesized via condensation reaction of isatin hydrazone with aldehydic groups. In order to identify the structure characteristics of the prepared hydrazone derivatives, IR, 1H and 13C NMR spectroscopy, elemental analysis and X- ray crystallography were carried out. The antibacterial and antifungal activity of the derivatives against six bacterial strains (S. aureus, S. Pyogenes, E.coli, V. cholera, L. monocytogens and H.influenza) and seven fungal strains (C. glabrata,C. parapsilosis, C. krusei, C. albicans, C. tropicalis, C. keyfer, and C. neoformans) have been evaluated. All the compounds showed potent antibacterial activity with IC50 ≈ 7.81 µM against H. influenza while the activity against fungal strains was less. Compounds a and c also had IC50 ≈ 7.81 µM against S. Pyogens. Furthermore, the results of total antioxidant activity of hydrazone derivatives, expressed in terms of the ascorbic acid (mM) equivalents per mg of sample, indicates their superior bioactivity. These studies suggested that the istain hydrazone functionalized acetylenic derivatives could be an ideal biomaterial for antibacterial, antifungal and antioxidant applications. Besides this, these derivatives were transformed into isatin hydrazone appended 1,2,3 triazole based organotriethoxysilanes and their reaction conditions were optimised

The synthesis of organo-functionalized triethoxysilanes (OTES) has many recognized pathways; however, no study on their preparation via Knoevenagel condensation has been reported. The present work involves the synthesis of organo-functionalized triethoxysilanes using this unused green condensation route followed by the copper(I) catalyzed click silylation reaction. The reaction proceeded quickly without using any catalyst and can be applied for a wide range of derivatives of active methylene containing compounds. The newly synthesized OTES were obtained in good yields and were structurally characterized using various spectroscopic techniques. The methodology is highly desirable because it will blend two highly potent moieties i.e. the active methylenes and 1,2,3-triazole bridged triethoxysilanes, which can add to their individual potential and can be used for applications in supramolecular chemistry.

This report demonstrates the mimicking of an electronic circuit diagram towards Ce(III) ion sensing response supported by molecular keypads. The probe naphthyl based triazole linked silatrane (NTS) was efficiently synthesized using a series of microwave mediated reactions. The luminescent sensor NTS was explored for the ion sensing response towards Ce(III) ions using DMSO and DMSO : H2O 4 : 1 (v/v) as solvent media, respectively. The role of water in Ce(III) ion sensing was detected as ‘turn-off’ response that contradicts the ‘turn-on’ with DMSO. Further, the sensing of NO3− ions by NTS–Ce(III) ensemble was associated with blue shift on absorption maxima. These mimicking response studies were sketched as circuit diagrams assisted by molecular keypad behaviour as IMPLICATION output logic gate.

Owing to their easy approachability and high degree of structural and functional diversity, many multicomponent reactions such as 1,3-dipolar cycloaddition have been a rich source of conjugated π-systems, functionalised chromophores and active molecules. Despite their high potential for investigation and practical benefits, few products have thus far been scrutinized for their metal sensing abilities. In the present study, indolin-2-one chalcones bearing siloxy molecular systems were synthesized by a [2+3] cycloaddition-based reaction sequence. A designed chemosensor exhibited an optical (absorption spectra) response toward Cu2+ ions in an acetonitrile solution. Different aspects of the sensing phenomena such as selectivity and association constants were studied in detail using UV-vis spectroscopy. The calibration plot was linear (R2 = 0.9966) over a large range of Cu2+ ion concentrations (10 μM). This novel effort has initiated a well-organized method for the efficient improvement of cation sensors with triazole for detecting heavy metal pollutants in environmental and healthcare fields on a large scale.

The review lays emphasis on the significance of 1,2,3-triazoles synthesized via CuAAC reaction having potential to act as anti-microbial, anti-cancer, anti-viral, anti-inflammatory, anti-tuberculosis, anti-diabetic, and anti-Alzheimer drugs. The importance of click chemistry is due to its ‘quicker’ methodology that has the capability to create complex and efficient drugs with high yield and purity from simple and cheap starting materials. The activity of different triazolyl compounds was compiled considering MIC, IC50, and EC50 values against different species of microbes. In addition to this, the anti-oxidant property of triazolyl compounds have also been reviewed and discussed.

Trace lead (II) ions detection platform by adjoining an indole group, bis-triazole molecules and a silatranyl motif, has been proposed in this article. The receptor has been prepared by employing click chemistry methodology and the hybrid network was successfully identified by elemental analysis, IR and NMR (1H, 13C) spectroscopy. Absorption spectra analysis marked that the sensor exhibit an exclusively fastidious response to Pb2+ ions with a measured detection limit of 0.032µM at 1:1 stiochiometry. Further, computational studies have been carried out to get an insight into their structure and properties.

An organic moiety exhibit specific behavior in electronic absorption spectra while accommodating various solvents or metal ions and that specificity depends on particular guest solvent molecules or metal ions. Herein, we report about the photophysical properties of newly synthesized Propargyl-functionalized anthracene based Schiff bases (PASB). The formulated compounds have been thoroughly characterized by elemental analysis, FT-IR, NMR (1H and 13C) and UV-Vis spectroscopy, emphasized with Kamlet-Taft approach to explain the solvatochromic behavior of the synthesized compounds. PASBs were screened for the sensorial aptitude towards various metal ions which were found to act as an excellent UV-Vis probe for selective detection of Fe3+ ion with LOD 1.60 × 10−8M. Additionally, coordination behavior of ligand with Fe3+ ion was examined through the change in magnetic property of Fe3+ ions by VSM (vibrating sample magnetism) study. Moreover, complete structure elucidation of compound 4b was achieved via X-ray crystallography. The binding sites of sensor conjugate 4b-Fe3+ are well supported by FT-IR spectroscopy and computational analysis following DFT approach. The reported contribution focused on the factors determining the ability of propargyl appended Schiff base to present structure, mental picture of solvatochromism and metal ion sensitivity.

The known silatranes have attached substituents such as hydrogen, organyl, organoxy, aminoalkyl, thioorganyl, acyloxy, halogen, pseudohalogen, and other groups; however, their functionalization with any polycyclic aromatic hydrocarbon substituent is not recognized; this creates a niche in silatrane chemistry. The current study involves the first synthesis of pyrene-functionalized silatranes starting from 1-pyrenecarboxaldehyde and aminopropylsilane, fulfilling the niche. These newly synthesized silatranes were structurally characterized by IR spectroscopy, multinuclear NMR (1H and 13C) spectroscopy, electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS), and thermogravimetric analysis, and the structure of one of the silatranes was further confirmed by single crystal XRD analysis. The protozoans Giardia lamblia and Trichomonas vaginalis are responsible for a significant number of intestinal infections, and antioxidants are needed to prevent the formation of reactive species in the body. In the present study, anti-oxidant, anti-giardiasis, and anti-trichomoniasis potential of the synthesized compounds were assessed. Both compounds displayed significant activity against G. lamblia and T. vaginalis and showed potential anti-oxidant activity. The results indicate that one of the compounds is even more active against G. lamblia than metronidazole, a standard drug. Moreover, a theoretically and electrochemically supported mechanism for the anti-oxidant activity of the compounds has been reported in this study.

The present article emphasizes the synthesis of Schiff base derived bis(1,2,3-triazolyl-γ-propyltriethoxysilanes) (3a-3d) by utilizing an efficient and biocompatible Cu(I) catalyzed 'Click Chemistry' approach. All the synthesized compounds 3a-3d have been well-characterized by IR, NMR (1H and 13C) and HRMS spectroscopic techniques. Further, 3a was immobilized over silica nanosphere and the resultant hybrid nanoparticles were thoroughly examined by IR, XRD, EDX, TGA, and SEM analysis. The photophysical properties of 3a and their hybrid nanoparticles were studied which showed dual recognition of Cu2+ and Fe3+ ions with negligible interference from other metal ions. Most importantly, hybrid nanoparticles have strong binding affinity towards Cu2+ and Fe3+ compared to compound 3a. All types of the binding interaction between chemosensors and metal ions, Cu2+ and Fe3+ got reversed upon addition of Na2EDTA. The interacting behaviour of 3a towards Cu2+ and Fe3+ ions has been studied by performing DFT calculations.

The present article is about the synthesis of new family of pyrimidine based triazole linked organosilanes using Cu (I) catalyzed azide-alkyne click silylation reaction. The synthesized products have been well characterized by various spectroscopic techniques and they were further exploited for their use as receptor for the detection of Cu2+ ion. The photophysical studies revealed that the organosilanes possess high sensitivity towards Cu2+ ion. Furthermore, the binding with the Cu2+ ion was affirmed using stern volmer equation. Interestingly, the limit of detection and the binding constant (Ksv) were in the range of 1.1–3.4 × 10−7 M and 3.27–7.47 × 105 respectively. This makes the present work favourable in the branch of detection of heavy metal ion with lower detection limit without the need of any high priced technique.

Mercury Contamination represents a major environmental and health concern for which new eco-friendly solutions are desired. Azide–alkyne cycloaddition and Claisen Schmidt reaction were attempted to trigger a flavanone based bis-siloxyl hybrid materials. The synthesized bis-organosilicon compound was used as receptor for recognition of Hg (II) ions in semi aqueous medium. The presence of silicon makes the receptor impetus and has benefits in the field of nanochemistry. All the final compounds were recognized by spectroscopic techniques like IR, NMR and further corroborate by mass spectrometry.

This work embodies the derivatization of functional organic fragments with triethoxysilyl motif to afford organotriazole silanes (5a-5e) using copper-catalyzed alkyne azide cycloaddition reaction under strictly anhydrous conditions. Furthermore, when compound 5e was employed for the sensorial aptitude towards wide spectrum of transition metal ions, UV–Vis absorption analysis substantiates the selective binding with Fe2+ and Cu2+ ions. This sensor unveils unassailable binding ability, high sensitive and selectivity in semi aqueous media. LOD values for recognition of Fe2+ and Cu2+ ions were estimated to be 0.11 μM and 0.12 μM respectively and on the basis of the Job's plot, the feasible binding approach of the receptor with these ions have also been proposed.

The known silatrane chemistry with polycyclic aromatic hydrocarbons (PAHs) has not been extensively investigated. The current study features synthesis and characterization of silatranes bearing pyrene substituent at the apical silicon site starting from 1-pyrenecarboxaldehyde and N-(3-(trimethoxysilyl)propyl)ethane-1,2-diamine. The synthesized silatranes were subjected to time-dependent hydrolysis study to examine their hydrolytic stability. In addition, one of the silatrane has been used to entrap nickel chloride to obtain complex of 1:1 composition. Mass, IR spectroscopic data and theoretical study revealed about the chelate structure of the complex in which silatrane acts as a bidentate ligand. The protozoans are cause of numerous infective diseases and so the article also assesses the anti-parasitic potential of the prepared compounds. Both the silatranes showed significant activity against Giardia lamblia and Entamoeba histolytica and very low IC50 values of (6) against G. lamblia and (7) against E. histolytica indicate their potential to act as efficient drug in comparison to standard drug, metronidazole.

This report demonstrates the mimicking of an electronic circuit diagram towards Ce(iii) ion sensing response supported by molecular keypads. The probe naphthyl based triazole linked silatrane (NTS) was efficiently synthesized using a series of microwave mediated reactions. The luminescent sensor NTS was explored for the ion sensing response towards Ce(iii) ions using DMSO and DMSO : H

This report presents unique “on-off” system for the detection of Cd(II) and Co(II) metal ion using 1,2,3-triazole linked fluorescein chemosensor (FLT). The studies were performed in 4:1 ethanol/water (v/v) solution and present an excellent “turn-off” and “turn-on” response with the Cd(II) and Co(II) metal ions, respectively. The need to develop FLT sensor was propelled by the high toxicity of Cd(II) and Co(II) ions in water and their competitive detection, with the naked eye, in aqueous solution of metal ion mixture. The high selectivity and specificity of 1,2,3-triazole containing FLT probe, consisting of fluorescein backbone, owes to Photo Electron transfer (PET) mechanism.

International audience; Two odd-odd nuclei from the A ~ 100 and A ~ 130 regions, namely ^102Rh and ^134Pr have been studied in search for chiral doublet bands via ^94Zr(^11B,3n)^102Rh and ^119Sn(^19F,4n)^134Pr reactions, respectively. Two nearly degenerate bands built on the pig_9/2 ⊗ vh_11/2 configuration have been identified in ^102Rh and on the pig_11/2 ⊗ vh_11/2 configuration for ^134Pr. Lifetimes of excited nuclear states were measured using Dopplershift attenuation method and recoil distance Doppler-shift method. The deexciting gamma rays were registered by the Indian National Gamma Array for ^102Rh and using the EUROBALL IV detector array with an inner Bismuth Germanate (BGO) ball for ^134Pr, respectively. Polarization and angular correlation measurements have been performed to establish the spin and parity assignments for these bands. The derived reduced transition probabilities are compared to the predicitons of the two quasiparticles + triaxial rotor and interacting boson fermion-fermion models.

In many cases the chirality was almost observed but the transition probabilities are different. This fact is clearly seen in the cases of 134Pr and 102Rh. In the case of chirality, the yrast and the side bands should be nearly degenerate. In the angular momentum region where chirality sets, the B(E2) values of the electromagnetic transitions deexciting analog states of the chiral twin bands should be almost equal. Correspondingly the B(M1) values should exhibit staggering. Our lifetime measurements in the cases of 134Pr and 102Rh and the theoretical analysis do not support static chirality. Chirality has mainly a dynamical character in both nuclei. In the present paper, we compare our results with the results for other chiral candidate nuclei, which fulfill static chirality conditions.

Excited states in 102Rh, populated in the fusion-evaporation reaction Zr94(11B,3n)102Rh at a beam energy of 36 MeV, were studied using the Indian National Gamma Array spectrometer at Inter University Accelerator Center, New Delhi. The angular correlations and the electromagnetic character of some of the gamma-ray transitions observed were investigated in detail. A new chiral candidate sister band was found. Lifetimes of exited states in both chiral candidate bands of 102Rh were measured for the first time in the A∼100 mass region by means of the Doppler-shift attenuation technique. The derived reduced transition probabilities are compared to the predictions of the two quasiparticles plus triaxial rotor model. Both experimental results and calculations do not support the presence of static chirality in 102Rh.

Excited states in 102Rh were populated in the fusion-evaporation reaction 94Zr(11B, 3n)102Rh at a beam energy of 36 MeV using the INGA spectrometer at IUAC, New Delhi. The angular correlations and the electromagnetic character of some of the gamma-ray transitions observed were investigated in details. A new chiral candidate sister band was found. Lifetimes of exited states in 102Rh were measured using the Doppler-shift attenuation technique and the derived reduced transition probabilities are compared to the predictions of the Two Quasiparticles Plus Triaxial Rotor model.

Excited states in 102Rh were populated in the fusion-evaporation reaction 94Zr(nB, 3n)102Rh at a beam energy of 36 MeV, using the INGA spectrometer at IUAC, New Delhi. The angular correlations and the electromagnetic character of some of the ?-ray transitions observed in 102Rh were investigated in detail. A new candidate for a chiral twin band was identified in 102Rh for the first time.

Excited states in102Rh were populated in the fusion-evaporation reaction 96Zr(11B, 3n)102 Rh. The angular correlations and the electromagnetic character of some of the gamma-ray transitions observed were investigated in detail. A new chiral candidate sister band was found in the level-scheme of 102Rh.