Solvent dependant isatin-based Schiff base sensor as fluorescent switch for detection of Cu 2+ and S 2− in human blood serum
作者:Mohammad Shakir、Ambreen Abbasi
DOI:10.1016/j.ica.2017.04.057
日期:2017.8
A isatin based Schiff base sensor, L was synthesized by simple one step condensation method and was characterized by various physico-chemical techniques. Sensor L, exhibited fluorescence turn off response to Cu2+ in DMSO: methanol solvent mixture which was further used to detect S2- with fluorescence turn-on response. On changing solvent mixture from DMSO: methanol to DMSO: water reversal of fluorescence behaviour was observed for Cu2+ and S2-. Also, the in-situ formed L-Cu2+ ensemble showed colorimetric response to S2- at high concentration of sulphide ions in both solvent mixtures. Sensor, L was successfully applied to recognize Cu2+ and S2- in human blood serum with micromolar detection limits. (C) 2017 Published by Elsevier B.V.
An Eco-Friendly Synthesis of Some Novel Symmetrical Bis Spiro-Indoles
作者:Siva S. Panda、Nidhi Jain、Nusrat Jehan、Sunita Bhagat、Subhash C. Jain
DOI:10.1080/10426507.2011.582057
日期:2012.1.1
Abstract A highly efficient synthesis of some novelsymmetrical bis spiro-indoles has been achieved by cyclocondensation of hitherto unknown bis Schiff's bases with mercaptoacetic acid in water. The structures of the new compounds have been deduced by elemental analysis and spectral data. GRAPHICAL ABSTRACT
Potent antiproliferative active agents: novel bis Schiff bases and bis spiro β-lactams bearing isatin tethered with butylene and phenylene as spacer and DNA/BSA binding behavior as well as studying molecular docking
values less than that of the clinically-used anticancer agent cisplatin towards both the MCF-7 and HeLa cells, while several of the bis-isatin β-lactams showed similar bioactivity to that of cisplatin. All of the oxindoles and spirooxindoles displayed a selective anticancer effect except 10b. To study the possible mechanism for this bioactivity, DNA and BSA binding analyses were performed using fluorescence