PyridiniumN-Phenolate Betaine Dyes

Abstract

Introduction 10429 2. Historical Contextualization 10431 3. Synthesis of Pyridinium N-Phenolate Dyes 10433 4. Solvatochromic Properties of Pyridinium N-Phenolate Dyes 10435 4.1. X-ray Crystallographic Studies of the Molecular Structures of Pyridinium N-Phenolate Dyes 10437 4.2. Quantum Chemical Calculations Involving Pyridinium N-Phenolate Dyes 10438 4.3. The E T (30) and E T N Solvent Polarity Scale 10440 4.4. Multiparametric Approaches to the Analysis of the E T (30) and E T N Scale 10441 5. Secondary Solvatochromic Pyridinium N-Phenolate Dyes 10442 6. Investigation of the Physical Properties of Room-Temperature Ionic Liquids 10443 7. Thermosolvatochromism of Pyridinium N-Phenolate Dyes 10450 8. Halochromism of Pyridinium N-Phenolate Dyes 10451 9. Piezosolvatochromism of Pyridinium N-Phenolate Dyes 10452 10. Pyridinium N-Phenolate Dyes in the Investigation of Solvent Mixtures 10453 11. Application of Pyridinium N-Phenolate Dyes in the Construction of Chromogenic Chemosensors 10455 11.1. Chirosolvatochromism of Pyridinium N-Phenolate Dyes 10456 11.2. Chromoionophores 10456 11.3. Chromogenic Chemosensors for Anionic Species 10457 11.4. Chromogenic Chemosensors for Neutral Analytes 10458 12. Pyridinium N-Phenolate Dyes as Probes To Measure the Polarity of Solid Surfaces 10459 13. Pyridinium N-Phenolate Dyes in the Study of Microheterogeneous Systems 10460 13.1. Investigation of Surfactants in Aqueous and Organic Media 10462 13.2. Pyridinium N-Phenolate Dyes in the Investigation of Cyclodextrins in Solution 10463 13.

Raman and Surface Enhanced Raman Signals of the Sensor 1-(4-Mercaptophenyl)-2,4,6-Triphenylpyridinium Perchlorate

“…In this work, we assign and discuss for the first time the Raman and SERS spectra of 1-(4-mercaptophenyl)-2,4,6-triphenylpyridinium perchlorate (4-MPTP), a secondary betaine 13 , by using theoretical data. Calculations are performed using DFT data at the B3LYP/6-31G(d) level of the theory; the Extended Hückel theory is proposed to characterize the analyte surface interaction.…”

Cellulose carboxylate/tosylate mixed esters: Synthesis, properties and shaping into microspheres

“…Reichardt and Welton 2010;Machado et al 2014). Therefore, values of max of WB should be sensitive the (average) number of free hydroxyl groups in the cellulose derivative, i.e, to DSCaboxy, as we demonstrated previously(Fidale et al 2010;Casarano et al 2011;Fidale et al 2013), and listed inTable SM-3.…”

Solvatochromic Reichardt’s Dye in Micelles of Sodium Cetyl Sulfate: Md Modeling of Location Character and Hydration

“…One of the most suitable and commonly used dyes is 4-(2,4,6-triphenylpyridinium-1-yl)-2,6-diphenylphenolate, known as the standard solvatochromic Reichardt's dye (RD). The information about the polarity of the medium is obtained from the spectrum of the dye dissolved in it, because this spectrum strongly depends on the dielectric constant and hydrogen bonds donating ability of the microenvironment of the dye molecule and, especially, its O atom that is a single hydrogen bonds acceptor in the molecule [1][2][3]. Consequently, the polarity parameter of the medium, which is denoted E T (30), is calculated from the wavelength of the maximum in the visible portion of the spectrum, max However, the treatment of polarity parameters of colloid solutions is complicated by the highly inhomogeneous character of the dye molecule microenvironment.…”