scholarly journals Investigation of Five Organic Dyes in Ethanol and Butanol for Two-Color Laser-Induced Fluorescence Ratio Thermometry

Optics ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Yogeshwar Nath Mishra ◽  
Ajeth Yoganantham ◽  
Matthias Koegl ◽  
Lars Zigan
Keyword(s):  
Rhodamine B ◽  
Fluorescence Spectra ◽  
Rhodamine 6G ◽  
Organic Dyes ◽  
Laser Induced Fluorescence ◽  
Eosin Y ◽  
Temperature Dependent ◽  
Spectral Bands ◽  
Sulforhodamine 101 ◽  
Fluorescence Thermometry

In this article, we compare absorption and temperature-dependent fluorescence spectra of five organic dyes for 2c-LIF (two-color laser-induced fluorescence) thermometry in ethanol and butanol. The dyes fluorescein, eosin Y, rhodamine B, rhodamine 6G, and sulforhodamine 101 individually mixed in ethanol and butanol were studied at liquid temperatures of 25–65 °C. The self-absorption spectral bands are analyzed along with intensity ratios and the respective sensitivities for one-dye and two-dye 2c-LIF thermometry are deduced. For one-dye 2c-LIF, rhodamine B showed the highest sensitivity of 2.93%/°C and 2.89%/°C in ethanol and butanol, respectively. Sulforhodamine 101 and rhodamine 6G showed the least sensitivities of 0.51%/°C and 1.24%/°C in ethanol and butanol, respectively. For two-dye 2c-LIF, rhodamine B/sulforhodamine 101 exhibited the highest temperature sensitivities of 2.39%/°C and 2.54%/°C in ethanol and butanol, respectively. The dye pair eosin Y/sulforhodamine 101 showed the least sensitivities of 0.15%/°C and 0.27%/°C in ethanol and butanol, respectively.

Microscale Laser-Induced Fluorescence Method for Non-Intrusive Temperature Measurement

2007 ◽  
Author(s):  
Pramod Chamarthy ◽  
Steven T. Wereley ◽  
Suresh V. Garimella
Keyword(s):  
Flow Rate ◽  
Rhodamine B ◽  
Calibration Curve ◽  
Laser Induced Fluorescence ◽  
Normalization Procedure ◽  
Fluid Stream ◽  
Temperature Dependent ◽  
Different Temperatures ◽  
Rate Ratios ◽  
Temperature Responses

Ratiometric Laser Induced Fluorescence (LIF) Thermometry is applied for temperature measurements in a ‘T’ junction, using microscale visualization methods. Rhodamine B (RhB) and Rhodamine 110 (Rh110) are used as the temperature-dependent and temperature-independent dye, respectively. The temperature responses of the two dyes were carefully measured for different concentrations. A novel normalization procedure for the calibration curve is proposed to render the technique system-independent. The mixing plane between a hot and a cold fluid stream for three different temperatures and three different flow rate ratios is visualized using 4X and 10X magnifications.

Rhodamine Based Sensors for Laser Induced Fluorescence for Droplet Temperature Measurements

Volume 4 ◽  
2004 ◽  
Author(s):  
V. Salazar ◽  
J. E. Gonzalez ◽  
L. Rivera ◽  
L. A. Rivera
Keyword(s):  
Rhodamine B ◽  
Fluorescent Dyes ◽  
Laser Sheet ◽  
Laser Induced Fluorescence ◽  
Temperature Measurements ◽  
Temperature Sensitive ◽  
Droplet Temperature ◽  
Temperature Diagnostic ◽  
Fluorescence Thermometry ◽  
Spatial Temperature

Rhodamine based sensors for applications in laser induced fluorescence thermometry were tested, and optimized. Laser Induced Fluorescence (LIF) is an optical non intrusive technique for temperature measurements. The technique uses a temperature sensitive dye, which is excited by a laser sheet providing spatial temperature diagnostic. The fluorescent dyes Rhodamine B and the Rhodamine 110, were used in combination with water. Thus in the present work the main findings regarding to the sensors: RhodamineB-water, RhodamineB-ink, RhodamineB/110-water, and RhodamineB/110-ink, are reported.

Exciplex Fluorescence Thermometry of Liquid Fuel

1989 ◽  
Vol 43 (2) ◽  
pp. 274-278 ◽  
Author(s):  
John H. Stufflebeam
Keyword(s):  
Liquid Fuel ◽  
Fluorescence Spectra ◽  
High Accuracy ◽  
Prediction Algorithm ◽  
Experimental Program ◽  
Temperature Dependent ◽  
Temperature Prediction ◽  
Flowing Liquid ◽  
Fluorescence Thermometry ◽  
Exciplex Fluorescence

An experimental program is described that investigates the application of exciplex fluorescence to the internal thermometry of flowing liquid decane in the temperature range 24–91°C. Decane is doped with pyrene and excited by laser radiation at 354.7 nm. A library of temperature-dependent, exciplex fluorescence spectra is obtained from a static, isothermal solution, and the spectral features are analyzed to produce a temperature-prediction algorithm. The solution then flows through a temperature gradient region, and the laser-induced fluorescence spectra that are recorded are used to determine the local temperature in the solution by application of the algorithm. Excellent agreement between the predicted temperatures and those measured by thermocouples in contact with the solution is realized. The experiment demonstrates the high accuracy and spatial resolution obtainable with this laser-based thermometry technique.

scholarly journals Matching Effects in the Interaction of Ionic Surfactants with Fluorescent Reagents in Micellar Solutions of Triton X-100

2021 ◽  
Vol 16 (3) ◽  
pp. 117-126
Author(s):  
Viktoriia Klovak ◽  
Sergey Kulichenko ◽  
Serhii Lelyushok
Keyword(s):  
Fluorescence Spectra ◽  
Rhodamine 6G ◽  
Cetylpyridinium Chloride ◽  
Analytical Signal ◽  
Ionic Surfactants ◽  
Eosin Y ◽  
Surfactant Micelles ◽  
Fluorescence Maximum ◽  
Hydrophobic Matching ◽  
Triton X

The influence of cationic and anionic surfactant solutions on the character of the fluorescence spectra of reagents of different charge and hydrophobicity in aqueous solutions of nonionic surfactant Triton X-100 has been studied. An increase in the fluorescence intensity and a shift in the position of the fluorescence maximum with increasing hydrophobicity of reagents and ionic surfactants have been shown. The analytical signal of the surfactant is further amplified in the proximity of the charge values of the reagent and the counterion of the surfactant. The non-monotonic nature of the hydrophobicity effect of cationic surfactants on their analytical signal in the system has been shown. The observed effects are explained by the realization of charge and hydrophobic matching in the interaction of surfactants with the fluorescent reagents. The obtained effects are significant in the design of fluorescent systems for the determination and study of surfactant micelles. Conditions for detecting the content of cetylpyridinium chloride by reaction with eosin Y and sodium tetradecyl sulfate by reaction with rhodamine 6G in the presence of Triton X-100 were proposed. The methods have been tested in detecting the content of the ionic surfactants in pharmaceuticals.

The Influence of Reverse Nonradiative Excitation Energy Transfer on the Fluorescence Spectra of Two-component Fluorescent Solutions

1994 ◽  
Vol 49 (10) ◽  
pp. 931-935 ◽  
Author(s):  
◽  
A. Kawski ◽  
B. Kukliński ◽  
H. Diehl
Keyword(s):  
Energy Transfer ◽  
Steady State ◽  
Excitation Energy ◽  
Rhodamine B ◽  
Fluorescence Anisotropy ◽  
Fluorescence Spectra ◽  
Rhodamine 6G ◽  
Excitation Energy Transfer ◽  
Steady State Fluorescence ◽  
Two Component

Abstract The reverse non-radiative excitation energy transfer (RNEET) in the system of rhodamine 6G (R6G, donor) and rhodamine B (RB, acceptor) is investigated. The presence of RNEET from the energy acceptors to the energy donors is dem onstrated using steady-state fluorescence and fluorescence anisotropy techniques. The spectra are deconvoluted and obtained results are analysed.

Whole-Field Temperature and Velocity Measurements for Two-Phase Flow Using PIV/LIF

2011 ◽  
Author(s):  
Carlos E. Estrada-Pe´rez ◽  
Sinchao Tan ◽  
Yassin A. Hassan
Keyword(s):  
Rhodamine B ◽  
Two Phase Flow ◽  
Organic Dyes ◽  
Fluorescence Emission ◽  
Phase Flow ◽  
Temperature Dependent ◽  
Two Phase ◽  
Field Temperature ◽  
Temperature And Velocity Fields ◽  
Two Temperature

In this study, an improved 2-D LIF/PTV technique is presented for the simultaneous measurement of temperature and velocity fields of cavity flows. 2-D Whole-Field temperature measurements are achieved by the two-color/two-dyes laser-induced fluorescence (LIF) technique, while the 2-D velocity is measured with particle tracking velocimetry (PTV) method. The improvements presented in this work is the modification of the commonly selected dyes to achieve the two-color LIF technique. Traditionally the organic dyes used to perform two-color LIF measurements are Rhodamine-B and Rhodamine-110, Rhodamine-B provides a fluorescence emission dependent on temperature while Rhodamine-110 provides an emission independent of temperature. In this work, Rhodamine-110 is replaced by Fluorescein-27, which provides a second temperature dependent dye. By using two temperature dependent dyes, the temperature sensitivity of the technique is increased. Also, in this work, a sensitivity analysis of the RHB-FL27 solution properties is presented, and its application to a natural convection two-phase flow within a cavity is explored.

EFFECT OF SILVER NANOPARTICLES ON THE FLUORESCENCE INTENSITY OF RHODAMINE 6G AND SULFORHODAMINE 101

2016 ◽  
Vol 75 (11) ◽  
pp. 1001-1008
Author(s):  
S.V. Nikolayev ◽  
V. V. Pozhar ◽  
M. I. Dzyubenko ◽  
K. S. Nikolayev
Keyword(s):  
Silver Nanoparticles ◽  
Fluorescence Intensity ◽  
Rhodamine 6G ◽  
Sulforhodamine 101

Rhodamines as Photocatalyst in Organic Synthesis

2020 ◽  
Vol 07 ◽  
Author(s):  
Avik K. Bagdi ◽  
Papiya Sikdar
Keyword(s):  
Visible Light ◽  
Organic Synthesis ◽  
Organic Dyes ◽  
Transition Metal Catalysts ◽  
Visible Light Photocatalysis ◽  
Eosin Y ◽  
Organic Transformations ◽  
The Sustainable Development ◽  
Mechanistic Pathway ◽  
Green Model

Abstract:: Organic synthesis under environment friendly conditions has great impact in the sustainable development. In this context, visible light photocatalysis has emerged as a green model as this offers an energy-efficient pathway towards the organic transformation. Different transition-metal catalysts (Ir-, Ru-, Cu- etc) and organic dyes (eosin Y, rose bengal, methylene blue etc) are well-known photocatalysts in organic synthesis. Apart from the well-known organophotoredox catalysts, rhodamines (Rhodamine B and Rhodamine 6G) have been also employed as efficient photocatalysts for different organic transformations. In this review, we will focus on the photocatalysis by rhodamines in organic synthesis. Mechanistic pathway of the methodologies will also be discussed. We believe this review will stimulate the employment of rhodamines in the visible light photocatalysis for efficient organic transformations in the future.

Sign in / Sign up

Export Citation Format

Share Document