Mechanochromic Polymers Based on Microencapsulated Solvatochromic Dyes

2020 ◽  
Vol 41 (7) ◽  
pp. 1900654 ◽  
Author(s):  
Céline Calvino ◽  
Emma Henriet ◽  
Livius F. Muff ◽  
Stephen Schrettl ◽  
Christoph Weder
Keyword(s):  
Solvatochromic Dyes

New benzotriazole-based D–A–D type solvatochromic dyes for water content detection in organic solvents

2021 ◽  
pp. 109667
Author(s):  
Fang Hou ◽  
Xiaolei Liu ◽  
Xueying Hao ◽  
Guofei Li ◽  
Futai Lu ◽  
...  
Keyword(s):  
Water Content ◽  
Organic Solvents ◽  
Solvatochromic Dyes

Interaction between Solvatochromic Dyes and Water Sampled from a Natural Source Treated with High Dilutions of Phosphorus

Homeopathy ◽  
2020 ◽  
Vol 109 (03) ◽  
pp. 126-132
Author(s):  
Ana Carla C. Aparicio ◽  
Larissa Helen S. de Oliveira ◽  
Jefferson S. Silva ◽  
Cideli P. Coelho ◽  
Sonia Regina Pinheiro ◽  
...  
Keyword(s):  
Water Source ◽  
Chemical Monitoring ◽  
Lake System ◽  
Solvatochromic Dyes ◽  
Physico Chemical ◽  
Untreated Water ◽  
Before And After ◽  
High Dilutions ◽  
Methylene Violet ◽  
Solvatochromic Dye

Abstract Background Highly diluted and succussed solutions interact with solvatochromic dyes, indicating that changes in solvent and solute polarity could be related to their mechanism of action. It is not known, however, how the activity associated with succussed high dilutions is transferred to untreated water and what the limits of this process are. Aims The aims of the present study were to ascertain whether a succussed high dilution of phosphorus (1.5 × 1−59 M; Phos 30cH) seeded into a natural water source that fed a fjord and two connected lakes could propagate itself through the lake system (total volume 2200 m3) and, moreover, whether the process could be tracked using solvatochromic dyes. Methods Samples of water were collected before and after seeding, at different times and places throughout the lake system. Controls comprised water taken from an untreated and adjacent, but independent, lake (1385 m3). Results Water samples taken up to 72 hours after the source treatment produced significant increases (p ≤ 0.03) in the absorbance of the solvatochromic dye methylene violet (MV), while samples from the control lake produced no changes. Conclusions The study indicates that activity associated with Phos 30c can propagate itself through large volumes of water, causing changes throughout a whole connected lake system, and that these changes can be tracked using the solvatochromic dye MV. This in turn means the use of homeopathic medicines in large volumes of drinking water, in farming and ecological contexts, now has the potential to be assessed with physico-chemical monitoring.

scholarly journals Homeopathic Potencies May Possess an Electric Field(-like) Component: Evidence from the Use of Encapsulated Solvatochromic Dyes

Homeopathy ◽  
2019 ◽  
Vol 109 (01) ◽  
pp. 014-022
Author(s):  
Steven J. Cartwright
Keyword(s):  
Electric Field ◽  
Bathochromic Shift ◽  
Visible Region ◽  
Electromagnetic Spectrum ◽  
Experimental Conditions ◽  
Fundamental Identity ◽  
Spectral Changes ◽  
Absorbance Change ◽  
Solvatochromic Dyes ◽  
Brooker’S Merocyanine

Background Homeopathic potencies have been shown to interact with a range of solvatochromic dyes to produce spectroscopic changes in the visible region of the electromagnetic spectrum. Furthermore, the nature of the changes observed under different experimental conditions is beginning to limit the number of possible hypotheses that can be put forward regarding the fundamental identity of potencies. Aims and Methods The present study uses β-cyclodextrins to encapsulate solvatochromic dyes of widely varying structures. The purpose of this approach is to de-couple the primary dye–potency interaction from any subsequent aggregation effects. Results Despite large differences in molecular structure between dyes, results show that potencies affect all dyes according to the same fundamental principles. Specifically, positively and negatively solvatochromic dyes collectively respond in opposite and complementary ways to potencies in accordance with the differential stabilisation of their excited and ground electronic states. Under the conditions of encapsulation, positively solvatochromic dyes display a bathochromic shift of, on average, 0.4 nm with a 2% absorbance change, and negatively solvatochromic dyes display a hypsochromic shift of, on average, 0.2 nm with a 1% absorbance change. This behaviour is only ever seen in two situations—where solvent becomes more polar or where an electric field is applied to solutions of dyes. Conclusions The conditions used in this and previous studies to investigate the interaction of potencies with solvatochromic dyes preclude increased polarity of solvent as being responsible for the observed effects and that an explanation in which potencies carry an electric field (or electric field-like) component is by far the more likely. From the magnitude of the spectral changes induced in the dye Brooker's merocyanine by Arsenicum 10M, an estimate of the strength of the postulated electric field of 1.16 × 107 V/m can be made, which is comparable with the potential difference across cell membranes.

Solvatochromic Dyes as Solvent Polarity Indicators

1994 ◽  
Vol 94 (8) ◽  
pp. 2319-2358 ◽  
Author(s):  
Christian Reichardt
Keyword(s):  
Solvent Polarity ◽  
Solvatochromic Dyes

Probing the Surface Polarity of Poly(α-amino acids) and α-Amino Acid Crystals with Genuine Solvatochromic Dyes

Langmuir ◽  
2001 ◽  
Vol 17 (3) ◽  
pp. 856-865 ◽  
Author(s):  
Stefan Spange ◽  
Christine Schmidt ◽  
Hans Rytger Kricheldorf
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Surface Polarity ◽  
Solvatochromic Dyes

An Easy and Versatile Experiment to Demonstrate Solvent Polarity Using Solvatochromic Dyes

2001 ◽  
Vol 78 (5) ◽  
pp. 649 ◽  
Author(s):  
Vanderlei Gageiro Machado ◽  
Clodoaldo Machado
Keyword(s):  
Solvent Polarity ◽  
Solvatochromic Dyes

ChemInform Abstract: Solute/Solvent Interactions and Their Empirical Determination by Means of Solvatochromic Dyes

ChemInform ◽  
2010 ◽  
Vol 25 (33) ◽  
pp. no-no
Author(s):  
C. REICHARDT ◽  
S. ASHARIN-FARD ◽  
A. BLUM ◽  
M. ESCHNER ◽  
A.-M. MEHRANPOUR ◽  
...  
Keyword(s):  
Solvent Interactions ◽  
Solvatochromic Dyes ◽  
Empirical Determination

Anionic chromogenic chemosensors highly selective for cyanide based on the interaction of phenyl boronic acid and solvatochromic dyes

2015 ◽  
Vol 221 ◽  
pp. 644-652 ◽  
Author(s):  
Lizandra Maria Zimmermann ◽  
Jaqueline Nicolini ◽  
Vanderléia Gava Marini ◽  
Vanderlei Gageiro Machado
Keyword(s):  
Boronic Acid ◽  
Solvatochromic Dyes ◽  
Phenyl Boronic Acid

scholarly journals A High Sensitivity IDC-Electronic Tongue Using Dielectric/Sensing Membranes with Solvatochromic Dyes

Sensors ◽  
2016 ◽  
Vol 16 (5) ◽  
pp. 668 ◽  
Author(s):  
Md. Khan ◽  
Alireza Khalilian ◽  
Shin-Won Kang
Keyword(s):  
Electronic Tongue ◽  
High Sensitivity ◽  
Solvatochromic Dyes
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