http://nopr.niscpr.res.in/handle/123456789/59809 2026-10-11T12:12:03Z http://nopr.niscpr.res.in/handle/123456789/59821 Title: Synthesis and crystal structure of a distorted face sharing double cubane like tetranuclear NiII-Cu2 II-NiII compound derived from a reduced di-Schiff base ligand Authors: Hazari, Alokesh Abstract: One new tetranuclear face sharing distorted double cubane like hetero-metallic NiII 2Cu2 II compound has been synthesized using a [NiLR] “metalloligand”, where H2LR = N,N'-bis(2-hydroxybenzyl)-1,3-propanediamine. The compound has been characterized by elemental analysis, spectroscopic methods and single crystal XRD. In the compound, in addition to the 2 -phenoxido bridges, the two terminal NiII atoms are linked to each of the central CuII ion by means of an end-on bridging azido (1,1-N3) ion separately, resulting a tetranuclear cubane like structure. Page(s): 465-471 2022-05-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/59820 Title: Solvation and Solvatochromism: An Overview Authors: Mallik, Tapati; Banerjee, Debashis Abstract: Different examples of solvatochromic shifts are shown and the theory that explain the non-specific general solvent effects are discussed here. The use of solvatochromic shifts for the determination of excited state dipole moment has been presented in detail in connection with a brief overview of different solvent polarity functions. The lack of proper theoretical expressions to explain the specific solvent effect stimulates to introduce the concept of “empirical measures of solvent polarity”, based on well known, convenient, solvent sensitive model processes. Various solvent sensitive polarity probes are discussed in this context. So far as quantitative estimation of various parameters responsible for the observed solvatochromic shifts are concerned, introduction of multiparameter approaches, its application in recent years has been carefully analyzed. The review also focuses some of the recent developments on the theoretical calculations of various solute-solvent interaction parameters based on quantum mechanical approaches. This issue solvation interaction by the use of mixed solvents has been discussed in detail, starting from the early development of the theories related to preferential solvation to the recent scenario, with a critical survey on the application of the concept of preferential solvation in the solubilization of drugs, polymers considering the emerging ‘green approach’ in recent years. Page(s): 472-481 2022-05-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/59819 Title: Molecular interactions of glycine and L-alanine + citrate buffer solutions at different temperatures: Volumetric, viscometric, and FTIR approach Authors: Patyar, Poonam; Kaur, Gurpreet Abstract: Densities,𝜌, and viscosities,𝜂of glycine/L-alanine in water and in (0.10, 0.50, 1.00) mol∙kg−1 aqueous trisodium citratebuffer (Na3CB) solutions of pH 7.40 at T = (298.15 to 318.15) K have been measured by using vibrating tube digital density meter and suspended level Ubbelohde capillary viscometer, respectively, at atmospheric pressure i.e.101.3 kPa. Thermodynamic parameters, i.e., 𝜙𝑣𝑜, Δ𝑡𝑟𝜙𝑣, viscosity B-coefficients, and Δ𝑡𝑟𝐵 obtained from density and viscositymeasurements have been used to unravel predominant forces among glycine/L-alanine and aqueous Na3CB solutions. Activation free energies, Δ𝜇2𝑜# for the viscous flow of solutions, have been obtained by applying transition state theory to theviscosity B-coefficients values. The results are further supported by FTIR studies for glycine/L-alanine in water and aqueous Na3CB solutions of pH 7.40, revealing the intermolecular hydrogen bonding in these systems. Moreover, the results obtained from volumetric, viscometric, and spectroscopic studies provide valuable information on intermolecular interactions, influencing their efficacy in biological applications. Page(s): 482-496 2022-05-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/59818 Title: Condensation product of 5-bromosalicylaldehyde and aminophenol: Fluorescence sensor for ascorbic acid and AND Logic Gate Authors: Bharali, Bidisha; Bordoloi, Priyakshi; Das, Diganta Kumar Abstract: Condensation product (L) of 5-bromosalicylaldehyde and aminophenol has been synthesised and characterised. Fluorescence of L enhances by 23 times on interaction with Ce3+ while it is quenched completely by Ce4+. Ascorbic acid (AA) is a well known strong reducing agent and this property has been used to act L:Ce4+ adduct as a fluorescence “on” sensor for AA. AA reduces Ce4+ into Ce3+ and thereby increasing fluorescence of L due to the formation of L:Ce3+ adduct. Molecules which generally coexist with AA viz. Cholesterol, Glucose, Sucrose and Dopamine found not to interfere. The interaction of L with Ce3+, Ce4+ and subsequently with AA has been verified with cyclic voltammetry. Page(s): 497-502 2022-05-01T00:00:00Z