http://nopr.niscpr.res.in/handle/123456789/60104 Fri, 09 Oct 2026 23:31:33 GMT 2026-10-09T23:31:33Z http://nopr.niscpr.res.in/handle/123456789/60116 Title: Tetraphosphonic acid functionalized perylenediimide derivative: Synthesis and pH dependent photophysical properties Authors: Goskulwad, Santosh P; Bhosale, Sheshanath V; Bhosale, Sidhanath V Abstract: The synthesis of phosphonic acid functionalized perylene diimide (PDI) molecular architecture has been demonstrated via functionalization at imide position. UV-Vis absorption and fluorescence emission spectroscopic techniques have been employed to investigate the photophysical properties of the novel PDI derivative at different pH (2 to 11). These results demonstrate the fascinating photophysical characteristics based on change in pH from 7 to 2 and 7 to 11 in aqueous medium. Page(s): 693-696 Fri, 01 Jul 2022 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/60116 2022-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/60115 Title: Tin (IV) chloride catalysed synthesis of di(indolyl)methanes during electrophilic substitution of indoles and 2-methyl indoles Authors: Nayak, Anupam; Banerji, Avijit; Banerji, Julie Abstract: An efficient methodology has been developed for the synthesis of di(indolyl)methanes in moderate to good yields during the study of the reactions of indole and 2-methyl indole using a series of aliphatic ketones in the presence of stannic chloride. It appears worth mentioning that with 2-methyl indole and acetone and ethyl methyl ketone the highly “elusive” indolylcarbinols, the postulated intermediates in the synthesis of di(indolyl)methanes, have been isolated. Page(s): 697-702 Fri, 01 Jul 2022 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/60115 2022-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/60114 Title: Synthesis, characterization and antioxidant activities of novel N-substituted pyrazoline derivatives bearing 3-benzo[b]thiophene and 5-styryl substituents Authors: Krishnan, Radhakrishnan; Pandy, Karthik Manikandan; Paratharaj, Senthil Kumar; Ray, Uttam Kumar Abstract: The new series of N-substituted pyrazoline derivatives bearing benzo[b]thiophene and styryl with trifluoromethyl substitution at para- and meta- positions were synthesized. The structures of newly synthesized compounds were characterized by UV, IR, NMR, Mass and single crystal XRD (SCXRD) and had been screened for antioxidant activity. The in vitro antioxidant activities screening revealed that hydroxyl radical scavenging (HRS) activities of compounds 3c, 3f, 4a, 4e, 4f, 5c, 5d 5e and 5g are stronger than the other compounds and the compound 5g shows much better antioxidant activity. Page(s): 703-716 Fri, 01 Jul 2022 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/60114 2022-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/60113 Title: Simple approach for the synthesis of a 1,1'-(ethane-1,2 diylbis(azanediyl))bis(pentan-2-ol): 13C/1H NMR spectroscopy and electrical characterizations Authors: Wechteti, Lassaad; Souemti, Ahmed; Selmi, Aymen; Romdhani-Younes, Moufida Abstract: 1,1'-(Ethane-1,2-diylbis(azanediyl))bis(pentan-2-ol) a β-aminoalcohol material denoted as 2a has been successfully synthesized. A white highly pure transparent material has been obtained after purification by chromatography techniques. Infrared spectroscopy has been used to identify the −NH and −OH functional groups. 1H and 13C NMR spectroscopy has confirmed the proposed structure. Complex Impedance Spectroscopy indicates an insulator behavior of the studied materials in the 313-393°C temperature range. Conductivity within this material is in intragrain contribution and its activation energy is about 1.3 eV. The physical properties of the studied material allow to consider β-amino alcohols as versatile intermediates for many organic compounds in the making of natural and synthetic originated biologically active compounds. They are widely used as β-blockers, insecticidal agents, and chiral auxiliaries. Page(s): 717-722 Fri, 01 Jul 2022 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/60113 2022-07-01T00:00:00Z