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

A variety of fluorescence-active fluorinated pyrazolines 13–33 was synthesized in good yields through cyclocondensation reaction of propenones 1–9 with aryl hydrazines 10–12. Some of the synthesized compounds provided promising fluorescence properties with quantum yield (Φ) higher than that of quini...

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Bibliographic Details
Published in:Royal Society open science 2018-03, Vol.5 (3), p.171964-171964
Main Authors: Girgis, Adel S., Basta, Altaf H., El-Saied, Houssni, Mohamed, Mohamed A., Bedair, Ahmad H., Salim, Ahmad S.
Format: Article
Language:English
Subjects:
Chemistry
Fluorescence Compounds
Fluorescence Quantum Yield
Pyrazoline Derivatives
Quantitative Structure–property Relationship Studies
Security Marker For Documents
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Summary:A variety of fluorescence-active fluorinated pyrazolines 13–33 was synthesized in good yields through cyclocondensation reaction of propenones 1–9 with aryl hydrazines 10–12. Some of the synthesized compounds provided promising fluorescence properties with quantum yield (Φ) 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. Five synthesized fluorescence-active pyrazolines (13, 15, 18, 19 and 23) with variable Φ were selected for treating two types of paper sheets (Fabriano and Bible paper). These investigated fluorescence compounds, especially compounds 19 and 23, provide improvements in strength properties of paper sheets. Based on the observed performance they can be used as markers in security documents.
ISSN:2054-5703
2054-5703
DOI:10.1098/rsos.171964