Low pH optical sensor based on benzothiazole azo dyes

FL Coelho, C de Ávila Braga, GM Zanotto, ES Gil… - Sensors and Actuators B …, 2018 - Elsevier
Amino-6-substituted benzothiazoles were obtained by a one-pot reaction of different anilines
with thiocyanogen and used to prepare the respective 2-phenylazo-6-substituted …

Photoacidity as a tool to rationalize excited state intramolecular proton transfer reactivity in flavonols

LGTA Duarte, JC Germino, C de Ávila Braga… - Photochemical & …, 2018 - Springer
This work presents the determination of acidic strengths at the electronic ground and excited
states (p K a and p K* a) of three flavonol derivatives using electronic absorption and …

Benzothiazole merocyanine dyes as middle pH optical sensors

FL Coelho, R da Costa Duarte, C de Ávila Braga… - Dyes and …, 2020 - Elsevier
Substituted merocyanine dyes were obtained by Knoevenagel condensation between
formylated arylbenzothiazole and quaternary 2-alkylbenzothiazoles. The condensations …

[HTML][HTML] Synthesis of a 5-carboxy indole-based spiropyran fluorophore: thermal, electrochemical, photophysical and bovine serum albumin interaction investigations

R da Costa Duarte, F da Silveira Santos… - Chemosensors, 2020 - mdpi.com
In this study, we synthesized a spiropyran containing an electron-withdrawing carboxyl
group in good yield by condensation of an aromatic aldehyde with enamine indole. The …

Microwave‐Assisted Synthesis of Novel 2,4‐Dihydro‐5‐[4‐(trifluoromethyl)phenyl]‐3H‐1,2,4‐triazol‐3‐ones and Potentiometric Determination of Their pKa in …

M Özil, F İslamoğlu, E Menteşe… - Helvetica Chimica …, 2010 - Wiley Online Library
Abstract The novel 4‐amino‐or 4‐aryl‐substituted 2, 4‐dihydro‐5‐[(4‐trifluoromethyl)
phenyl]‐3H‐1, 2, 4‐triazol‐3‐ones 3a–3g were synthesized by reaction of N …

[PDF][PDF] Microwave-assisted synthesis of some new benzylidenamino compounds and potentiometric determination of their pKa

E Menteşe, F İslamoğlu, B Kahveci - Revue Roumaine De Chimie, 2012 - revroum.lew.ro
A growing body of literature has shown the effectiveness of using microwaves in chemical
reactions. The aim of this study is to demonstrate a rapid and highly efficient synthesis of …

Bazı 1, 2, 4-triazol-3-on türevlerinin pKa değerlerinin hesaplanması

Z Levent - 2015 - acikerisim.erdogan.edu.tr
Bu çalışmada bazı triazol türevi bileşiklerin asidik iyonlaşma sabitleri çeşitli çözücü (2-
propanol, N, N-dimetilformamit, tert-butanol, asetonitril) ortamlarında potansiyometrik …