Ultra-low detection limits for an organic dye determined by fluorescence spectroscopy with laser diode excitation

1989 ◽  
Vol 61 (8) ◽  
pp. 861-863 ◽  
Author(s):  
Paul A. Johnson ◽  
Tye E. Barber ◽  
Benjamin W. Smith ◽  
James D. Winefordner
Keyword(s):  
Fluorescence Spectroscopy ◽  
Laser Diode ◽  
Detection Limits ◽  
Organic Dye

Complexation of Synthetic Organic Dye Dapoxyl with cyclodextrins studied by fluorescence spectroscopy

2009 ◽  
Author(s):  
Wajih Al‐Soufi ◽  
Mercedes Novo ◽  
Jorge Bordello ◽  
Daniel Granadero
Keyword(s):  
Fluorescence Spectroscopy ◽  
Organic Dye

scholarly journals Isatin-1,8-Naphthalimide Hydrazones: A Study of Their Sensor and ON/OFF Functionality

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 397 ◽  
Author(s):  
Pavol Tisovský ◽  
Miroslav Horváth ◽  
Klaudia Csicsai ◽  
Jana Donovalová ◽  
Juraj Filo ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Anion Recognition ◽  
Detection Limits ◽  
Tautomeric Equilibrium ◽  
Light Stimulation ◽  
Anion Sensors

Five novel hydrazones derived from substituted isatins were synthesized as potential anion sensors. Using UV-VIS, FTIR, NMR and fluorescence spectroscopy, these compounds’ tautomeric equilibrium and Z-E photoisomerization were studied in DMF and CHCl3, depending on the hydrazone concentrations, the presence of basic anions and light stimulation. Anion recognition aspects (PF6−, HSO4−, Br−, Cl−, NO3−, F− and CH3COO−) and these receptors’ detection limits were also studied. We also tested the light-stimulated ON-OFF functionality of these compounds in the presence or absence of these anions.

scholarly journals Free-standing microcrystals of a fluorescent organic dye: Preparation and spectroscopic study

2006 ◽  
Vol 2006 ◽  
pp. 1-5 ◽  
Author(s):  
Mouhammad Abyan ◽  
Liliana Bîrlă ◽  
Franck Bertorelle ◽  
Fernanda Rodrigues ◽  
Suzanne Fery-Forgues
Keyword(s):  
Acrylic Acid ◽  
Fluorescence Spectroscopy ◽  
Pamam Dendrimer ◽  
Organic Dye ◽  
Optical Behaviour ◽  
Free Standing ◽  
Absorption And Fluorescence Spectroscopy ◽  
Acid Sodium Salt ◽  
Calf Thymus ◽  
Poly Acrylamide

Suspensions of microcrystals were obtained from an organic fluorescent dye, 4-n-octylamino-7-nitrobenz-2-oxa-1,3-diazole, by reprecipitation in water in the presence of various macromolecules: anionic or cationic PAMAM dendrimer, poly(acrylic acid, sodium salt), poly(acrylamide), and calf thymus DNA. The use of these additives allowed the size and shape of the microcrystals to be controlled. A study by UV/vis absorption and fluorescence spectroscopy revealed some common points, but also some interesting differences, in the optical behaviour of the five samples.

Blue-laser-diode-excited fluorescence spectroscopy of natural carious lesions

2004 ◽  
Author(s):  
John M. Girkin ◽  
Christel Rousseau ◽  
Andrew F. Hall ◽  
Ronnie Strang ◽  
C. John Whitters ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Laser Diode ◽  
Blue Laser ◽  
Carious Lesions ◽  
Blue Laser Diode

Organic dye penetration quantification into a dental composite resin cured by LED system using fluorescence spectroscopy

2007 ◽  
Author(s):  
Rosane de Fátima Zanirato Lizarelli ◽  
Maciel E. Silva, Jr. ◽  
Emery C. C. C. Lins ◽  
Mardoqueu M. Costa ◽  
José Eduardo P. Pelino ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Composite Resin ◽  
Organic Dye ◽  
Dental Composite ◽  
Dye Penetration ◽  
Dental Composite Resin

Quantitative parallel EELS spectrum imaging developed as a new tool in AEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1202-1203
Author(s):  
Gianluigi Botton ◽  
Gilles L'espérance
Keyword(s):  
Statistical Analysis ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Systematic Study ◽  
Present Author ◽  
Chemical Elements ◽  
Detection Limits ◽  
Research Groups ◽  
Quantitative Performance ◽  
Spectrum Imaging

As interest for parallel EELS spectrum imaging grows in laboratories equipped with commercial spectrometers, different approaches were used in recent years by a few research groups in the development of the technique of spectrum imaging as reported in the literature. Either by controlling, with a personal computer both the microsope and the spectrometer or using more powerful workstations interfaced to conventional multichannel analysers with commercially available programs to control the microscope and the spectrometer, spectrum images can now be obtained. Work on the limits of the technique, in terms of the quantitative performance was reported, however, by the present author where a systematic study of artifacts detection limits, statistical errors as a function of desired spatial resolution and range of chemical elements to be studied in a map was carried out The aim of the present paper is to show an application of quantitative parallel EELS spectrum imaging where statistical analysis is performed at each pixel and interpretation is carried out using criteria established from the statistical analysis and variations in composition are analyzed with the help of information retreived from t/γ maps so that artifacts are avoided.

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