Metal Chelates of Sulfafurazole Azo Dye Derivative: Synthesis, Structure Affirmation, Antimicrobial, Antitumor, DNA Binding, and Molecular Docking Simulation

A series of divalent and one trivalent metal chelates of the azo ligand resulting from coupling of sulfafurazole diazonium chloride with resorcinol have been designed and synthesized. Structure investigation of the isolated chelates have been achieved by applying spectroscopic and analytical tools which collaborated to assure the formation of the metal chelates in the molar ratios of 1L: 1M for Ni(II), Co(II), and Fe(III) chelates, where Cu(II) and Zn(II) complexes formed in the ratio 2L : 1M. The geometrical arrangement around the metal canters was concluded from UV-Vis spectra to be octahedral for all metal chelates. The attachment of the ligand to the metal ions took place through the azo group nitrogen and o-hydroxyl oxygen through proton displacement leading to the ligand being in monobasic bidentate binding mode. Antimicrobial and antitumor activities of the interested compounds have been evaluated against alternative microorganisms and cancer cells, respectively, in a trial to investigate their extent of activity in addition to docking studies. The mode of interaction of the compounds with SS-DNA has been examined by UV-Vis spectra and viscosity studies

The Impact of Errors on Differential Optical Processing

Abstract: Nonlinear optical processing can reduce noise by combining time-shifted signals, creating a differential translation. Sender and receiver compensations are compared and shown to affect repeated use of noise reduction and amplify errors in different ways. OCIS codes: (060.4370) Nonlinear optics, fibers, (070.4340) Nonlinear optical signal processing

Experimental Demonstration of a Variable Bandwidth, Shape and Center-Frequency RF Photonics Filter using a Continuously Tunable Optical Tapped-Delay-Line and Having an Optical Output

Abstract: We experimentally demonstrate the RF photonics filter using optical tapped delay line based on an optical frequency comb and a PPLN waveguide as the multiplexer. RF filters with variable bandwidth, shape and center-frequency are implemented. OCIS codes: (060.4370) Nonlinear optics, fibers, (070.4340) Nonlinear optical signal processing. 1

Experimental Demonstration of All-Optical Phase Noise Mitigation of 40-Gbits/s QPSK Signals by Mixing Differentially Delayed Nonlinear Products

Abstract: We propose and demonstrate an all optical phase noise mitigation scheme by mixing differentially delayed nonlinear products. For 40-Gbits/s signals, phase squeezing results in phase noise range reduction of around 50 % and 1.5 dB OSNR gain at BER 10-5. OCIS codes: (070.4340) Nonlinear optical signal processing; (060.2360) Fiber optics links and subsystems 1