Retracted Article: A simple rhodamine-based dual signalling reversible molecular switch for recognition of Al(III) with Promising applications for advanced logic operations – ‘OR’, ‘Keypad Lock’ & ‘INHIBIT’ logic function and cell-imaging studies†.

Abstract

A simple salicylaldimine-based receptor equipped with rhodamine moiety (L3) has been designed and synthesized for detection of Al3+ ions, which exhibits high sensitivity over other metal ions in aqueous buffer-methanol...

A rhodamine-based ‘turn-on’ Al3+ ion-selective reporter and the resultant complex as a secondary sensor for F− ion are applicable to living cell staining

“…For experimental study, cells were grown to 80-90 % confluence, harvested with 0.025 % trypsin (Gibco BRL) and 0.52 mM EDTA (Gibco BRL) in PBS (phosphate-buffered saline, Sigma Diagnostics) and plated at desire cell concentration and allowed to re-equilibrate for 24h before any treatment. Cells were 20 rinsed with PBS and incubated with DMEM-containing L (10 µM, 1% DMSO) for 30 min at 37 °C. All experiments were conducted in DMEM containing 10% FBS and 1% PSN antibiotic.…”

“…The design, synthesis and spectroscopic characterization of novel 20 fluorescent chemosensor are of current interest and attracting much attention from the viewpoint of biomimmetic chemistry. 1 Development of various fluorescent artificial receptors that are able to transform the binding of ionic species into spectroscopic signals has expanded rapidly due to the simplicity, high 25 sensitivity and real-time monitoring with a low response time of fluorescence spectroscopy.…”

“…19 In recent years the field of anion recognition has also grown exponentially due to the significant role of anions in 55 environmental, biological and industrial systems. [20][21][22][23][24][25] Anion recognition with metal complexes has an advantage as they furnish electrostatic interactions that can authenticate anion binding even in semi-aqueous / aqueous medium. Moreover, recently we encourage to design those metal complexes which 60 upon coordination with another analyte (usually anion), changes the fluorescence signature of metal complex in favor of sensing and recognition of the target analyte.…”

“…Compared to the previous reports, this easy to synthesized probe behaves as a Al 3+ ion selective sensor as low as 15 nanomolar region in bio-friendly semi-aqueous solvent-medium with both excitation and emission wave lengths in the visible range of more significant in the field of development of chemosensor of biological relevant ions. 31 Moreover, here the sensing process is reversible and the probe could be recycled for 20 further use. 33 Besides, "OFF-ON-OFF" fluorescence behavior observed in the presence of Al 3+ and Fions strengthens the potential applications of the L′ ′ ′ ′-Al complex as a device with 'INHIBIT' logic gate functions.…”

“…Spectroscopic studies of Lʹ-Al complex in presence of F---ionsTo explore the utility of the resulting complex, 2, the advantage of the fact of reversibility of ring-opening of spirolactam form20 was taken into consideration. Here the rupture of the Lʹ-Al species to regenerate L and the subsequent change of optical properties of Lʹ-Al system were studied by introducing several anions (F − , Cl − , Br − , I − , CN − ,…”