New Approach for Securing and Dating Valuable Printed Documents.

This work deals with using a novel approach for securing and dating printed documents, which will detect any forging crime present. In this respect, the coded dots matrices (machine identification code (MIC)) for the used printers are extracted via a binary system of base 2 (0, 1). The UV ink used in the printing process is prepared from novel fluorescence compounds together with polyvinyl alcohol.

Comparative DFT Computational Studies with Experimental Investigations for Novel Synthesized Fluorescent Pyrazoline Derivatives.

A novel series of pyrazoline derivatives were synthesized and their spectral properties were characterized via FT-IR, H, and C NMR. The electronic transitions and fluorescence properties were tracked via UV-Vis and emission spectrometry. The density functional theory (DFT) calculations have been also computed to get spot onto the geometry, electronic transitions and spectroscopic properties theoretically that has been compared with the encountered experimental ones.

Synthesis, quantitative structure-property relationship study of novel fluorescence active 2-pyrazolines and application.

A variety of fluorescence-active fluorinated pyrazolines was synthesized in good yields through cyclocondensation reaction of propenones with aryl hydrazines . Some of the synthesized compounds provided promising fluorescence properties with quantum yield () higher than that of quinine sulfate (standard reference). Quantitative structure-property relationship studies were undertaken supporting the exhibited fluorescence properties and estimating the parameters governing properties.