NOPR Collection:http://nopr.niscpr.res.in/handle/123456789/601042026-10-09T23:31:33Z2026-10-09T23:31:33ZTetraphosphonic acid functionalized perylenediimide derivative: Synthesis and pH dependent photophysical propertiesGoskulwad, Santosh PBhosale, Sheshanath VBhosale, Sidhanath Vhttp://nopr.niscpr.res.in/handle/123456789/601162022-07-15T11:12:31Z2022-07-01T00:00:00ZTitle: 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): 693-6962022-07-01T00:00:00ZTin (IV) chloride catalysed synthesis of di(indolyl)methanes during electrophilic substitution of indoles and 2-methyl indolesNayak, AnupamBanerji, AvijitBanerji, Juliehttp://nopr.niscpr.res.in/handle/123456789/601152022-07-15T11:10:38Z2022-07-01T00:00:00ZTitle: 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): 697-7022022-07-01T00:00:00ZSynthesis, characterization and antioxidant activities of novel N-substituted pyrazoline derivatives bearing 3-benzo[b]thiophene and 5-styryl substituentsKrishnan, RadhakrishnanPandy, Karthik ManikandanParatharaj, Senthil KumarRay, Uttam Kumarhttp://nopr.niscpr.res.in/handle/123456789/601142022-07-15T11:08:55Z2022-07-01T00:00:00ZTitle: 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): 703-7162022-07-01T00:00:00ZSimple approach for the synthesis of a 1,1'-(ethane-1,2 diylbis(azanediyl))bis(pentan-2-ol): 13C/1H NMR spectroscopy and electrical characterizationsWechteti, LassaadSouemti, AhmedSelmi, AymenRomdhani-Younes, Moufidahttp://nopr.niscpr.res.in/handle/123456789/601132022-07-15T11:06:44Z2022-07-01T00:00:00ZTitle: 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): 717-7222022-07-01T00:00:00Z