Enhanced Red Fluorescence Emissions of [Ru(bpy)3]Cl2 in DNA Complexes

2020 ◽  
Vol 842 ◽  
pp. 145-152
Author(s):  
Wen Juan He ◽  
Rong Cao ◽  
Bei Qing Huang ◽  
Xian Fu Wei ◽  
Li Juan Liang
Keyword(s):  
Fluorescent Dyes ◽  
Red Light ◽  
Fluorescent Dye ◽  
Luminous Intensity ◽  
Luminescence Properties ◽  
Molecular Devices ◽  
Peak Wavelength ◽  
Fluorescent Substance ◽  
Main Emission Peak ◽  
Dna Complex

The research on molecular devices, fluorescent labels and fluorescent probes based on the interaction between biomolecular DNA and fluorescent dyes has been paid more attention at home and abroad. In this paper, the luminescence properties of the [Ru(bpy)3]Cl2 complex itself were investigated, and the luminescence properties of the [Ru(bpy)3]Cl2 complex under the interaction of the solution and the film were observed by association of the DNA complex with the [Ru(bpy)3]Cl2 complex. The results showed that [Ru(bpy)3]Cl2 emitted red light with its main emission peak wavelength was 610nm, and its fluorescence intensity was the highest when the concentration of solution substance was 10mmol/L. When doped with DNA solution in [Ru(bpy)3]Cl2 complex, a small amount of fluorescent dye [Ru(bpy)3]Cl2 can be used to achieve a higher luminous intensity At the same time, the fluorescent dye [Ru(bpy)3]Cl2 doped with DNA solution reached a higher luminous intensity in the thin-film state. This experiment provides an important experimental basis for the application of fluorescent substance [Ru(bpy)3]Cl2 in luminescent thin films.

Refractory Periods Observed by Intrinsic Signal and Fluorescent Dye Imaging

1998 ◽  
Vol 80 (3) ◽  
pp. 1522-1532 ◽  
Author(s):  
Andrew F. Cannestra ◽  
Nader Pouratian ◽  
Marc H. Shomer ◽  
Arthur W. Toga
Keyword(s):  
Fluorescent Dyes ◽  
Imaging Techniques ◽  
Human Subjects ◽  
Fluorescent Dye ◽  
Initial Stimulus ◽  
Intrinsic Signals ◽  
Intrinsic Signal ◽  
Refractory Periods ◽  
Auditory Cortices ◽  
The Relationship

Cannestra, Andrew F., Nader Pouratian, Marc H. Shomer, and Arthur W. Toga. Refractory periods observed by intrinsic signal and fluorescent dye imaging. J. Neurophysiol. 80: 1522–1532, 1998. All perfusion-based imaging modalities depend on the relationship between neuronal and vascular activity. However, the relationship between stimulus and response was never fully characterized. With the use of optical imaging (intrinsic signals and intravascular fluorescent dyes) during repetitive stimulation paradigms, we observed reduced responses with temporally close stimuli. Cortical evoked potentials, however, did not produce the same reduced responsiveness. We therefore termed these intervals of reduced responsiveness “refractory periods.” During these refractory periods an ability to respond was retained, but at a near 60% reduction in the initial magnitude. Although increasing the initial stimulus duration lengthened the observed refractory periods, significantly novel or temporally spaced stimuli overcame them. We observed this phenomenon in both rodent and human subjects in somatosensory and auditory cortices. These results have significant implications for understanding the capacities, mechanisms, and distributions of neurovascular coupling and thereby possess relevance to all perfusion-dependent functional imaging techniques.

Calix[8]arene Functionalized Polyglycerol Nanogels for Encapsulation and Stabilization of Fluorescent Dyes

2012 ◽  
Vol 1403 ◽  
Author(s):  
Dirk Steinhilber ◽  
Florian Paulus ◽  
Andrew T. Zill ◽  
Steven C. Zimmerman ◽  
Rainer Haag
Keyword(s):  
Ring Opening ◽  
Guest Molecule ◽  
Fluorescent Dyes ◽  
Miniemulsion Polymerization ◽  
Fluorescent Dye ◽  
Laser Illumination ◽  
Strong Laser ◽  
Anionic Ring

ABSTRACTIn this paper we report on the preparation of calix[8]arene functionalized polyglycerol nanogels by miniemulsion polymerization. The gel macromonomers were prepared by anionic ring-opening multibranching polymerization of glycidol using calix[8]arene as initiator. 1,1′,3,3,3′,3′-hexamethyl-2,2′-indotricarbocyanine iodide (HITC) red fluorescent dye was used as a guest molecule. Photobleaching upon strong laser illumination was significantly reduced when the dye was encapsulated inside the nanogel.

1-Phenylethynylpyrene (PEPy) as a novel blue-emitting dye for qPCR assay

The Analyst ◽  
2016 ◽  
Vol 141 (4) ◽  
pp. 1331-1338 ◽  
Author(s):  
Ilya O. Aparin ◽  
Valentina M. Farzan ◽  
Olga A. Veselova ◽  
Alexey A. Chistov ◽  
Alexander T. Podkolzin ◽  
...  
Keyword(s):  
Quantitative Pcr ◽  
Short Wavelength ◽  
Fluorescent Dyes ◽  
Fluorescent Dye ◽  
Qpcr Assay ◽  
Taqman Probes ◽  
End Point

We demonstrated that 1-phenylethynylpyrene (PEPy) is a superior substitute for AMCA and Alexa-350 as a short wavelength fluorescent dye for end-point PCR and quantitative PCR. This study broadens the panel of fluorescent dyes suitable for the use in Taqman probes.

Luminescence Properties and Synthesis of SrMgAl10O17:Mn4+ Red Phosphor for White Light-Emitting Diodes

2016 ◽  
Vol 16 (4) ◽  
pp. 3489-3493 ◽  
Author(s):  
Renping Cao ◽  
Hongdong Xue ◽  
Xiaoguang Yu ◽  
Fen Xiao ◽  
Donglan Wu ◽  
...  
Keyword(s):  
Red Light ◽  
Solid State Reaction Method ◽  
Luminescence Properties ◽  
Conventional Solid State Reaction ◽  
Light Emitting ◽  
White Leds ◽  
Structure Morphology ◽  
Optimal Doping Concentration ◽  
Cie Chromaticity ◽  
White Light Emitting Diodes

A series of Mn4+ doped SrMgAl10O17 phosphors are synthesized by a conventional solid-state reaction method in air, and their crystal structure, morphology, and fluorescence properties are investigated. The luminescence properties show clearly that SrMgAl10O17:Mn4+ phosphor can be excited by UV (200–380 nm), near UV (380–420 nm), and blue (420–480 nm) bands of LEDs chip, and emits red light in the range of 600 nm to 750 nm with satisfying CIE chromaticity coordinates (0.7207, 0.2793). The optimal doping concentration of Mn4+ ion is ∼1 mol%, and its lifetime is ∼1.15 ms. The possible luminous mechanism of Mn4+ ion is discussed by Tanabe-Sugano diagram. These experiment results indicate that Mn4+ doped SrMgAl10O17 phosphors can be a potential application as a red-emitting phosphor candidate in white LEDs.

Synthesis and luminescence properties of (Lu0.95−xCe0.05)2Ca1+2xMg2Si3O12 silicate garnet phosphors and its applications

2016 ◽  
Vol 09 (03) ◽  
pp. 1650049
Author(s):  
Wei Xia ◽  
Xiyan Zhang ◽  
Liping Lu
Keyword(s):  
Light Emitting Diode ◽  
Red Light ◽  
Emission Spectra ◽  
Peak Wavelength ◽  
Excitation Peak ◽  
Light Emitting ◽  
White Leds ◽  
Reducing Atmosphere ◽  
Color Rendering ◽  
Silicate Garnet

Silicate garnet phosphors (Lu[Formula: see text]Ce[Formula: see text]Ca[Formula: see text]Mg2Si3O[Formula: see text] with [Formula: see text], 0.05, 0.1, and 0.15 were prepared by high-temperature solid-state reaction in a reducing atmosphere. The crystal structure, photoluminescence and luminescence of the phosphors were investigated. The optimum excitation peak wavelength of the phosphors ranged from 450[Formula: see text]nm to 490[Formula: see text]nm, matching the emission spectra of a blue light-emitting diode chip. The phosphors emit orange-red light after excitation that can be tuned from 589[Formula: see text]nm to 597[Formula: see text]nm by changing the concentration of calcium ions. In addition, their emission made them suitable for use in warm-white LEDs with a high-color rendering index.

Preparation of YVO4:Eu3+ Red Phosphor by Combustion Synthesis and its Luminescence Properties

2010 ◽  
Vol 663-665 ◽  
pp. 45-49
Author(s):  
Zhen Hua Liang ◽  
Feng Qi Lu ◽  
Xiao Xia Liu ◽  
Gui Hua Peng
Keyword(s):  
Combustion Synthesis ◽  
Raw Materials ◽  
Red Light ◽  
Luminescence Properties ◽  
X Ray Diffraction ◽  
Post Heat Treatment ◽  
Red Phosphor ◽  
X Ray ◽  
Metal Nitrates ◽  
Ultraviolet Light Irradiation

YVO4:Eu3+ red phosphor was prepared by combustion synthesis without any post heat treatment at 700 oC-900 oC, using urea, oxalate acid and metal nitrates as raw materials. The product can emit bright red light under ultraviolet light irradiation. The phase compositions and luminescence properties were studied via X-ray diffraction (XRD) and photoluminescence spectra. The experimental results indicated that addition of appropriate amount of fuel and oxalate acid is favorable for the improvement of luminescence intensity.

Oxidative chemistry of fluorescent dyes: implications in the detection of reactive oxygen and nitrogen species

2011 ◽  
Vol 39 (5) ◽  
pp. 1221-1225 ◽  
Author(s):  
Balaraman Kalyanaraman
Keyword(s):  
Hydroxyl Radical ◽  
Superoxide Radical ◽  
Fluorescent Dyes ◽  
Diagnostic Marker ◽  
Reactive Oxygen ◽  
Fluorescent Dye ◽  
Chemical Mechanism ◽  
Nitrogen Species ◽  
Specific Oxidation

HE (hydroethidine), a widely used fluorescent dye for detecting intracellular superoxide, undergoes specific oxidation and hydroxylation reactions. The reaction between HE and O2•− (superoxide radical) yields a diagnostic marker product, 2-hydroxyethidium. This is contrary to the popular notion that O2•− oxidizes HE to form ethidium. HE, however, undergoes a non-specific oxidation to form ethidium in the presence of other oxidants (hydroxyl radical, peroxynitrite and perferryl iron) and other dimeric products. The mitochondria-targeted HE analogue Mito-SOX® undergoes the same type of oxidative chemistry to form products similar to those formed from HE. On the basis of the oxidative chemical mechanism of HE and Mito-SOX®, we conclude that flurorescence microscopy or related techniques are not sufficient to measure the superoxide-specific hydroxylated products. HPLC methodologies are required to separate and identify these products. Peroxynitrite reacts rapidly and stoichiometrically with boronates to form specific products. Assays using fluorescent-based boronate probes will be more reliable for peroxynitrite determination than those using either dichlorodihydrofluorescein or dihydrorhodamine.

Synthesis and luminescence properties of LiBaB9O15:Eu3+ single-component red-light emitting phosphors

2020 ◽  
Vol 224 ◽  
pp. 117324
Author(s):  
Wenhua Zhang ◽  
Yongjie Chen ◽  
Xiujuan Geng ◽  
Ying Yang ◽  
Linjiu Xiao
Keyword(s):  
Red Light ◽  
Single Component ◽  
Luminescence Properties ◽  
Light Emitting

Fluorescence in Candies Caused by Methyl Anthranilate, a Flavoring Agent

1979 ◽  
Vol 42 (8) ◽  
pp. 658-659 ◽  
Author(s):  
MASATAKE TOYODA ◽  
YOSIDO ITO ◽  
MASAHIRO IWAIDA
Keyword(s):  
Fluorescence Spectra ◽  
Fluorescent Dyes ◽  
Methyl Anthranilate ◽  
Fluorescent Substance ◽  
Addition Level ◽  
Flavoring Agent

A fluorescent substance was found in imported fruit candy. In the elution test of the fluorescent substance, it reacted in the same manner as fluorescent dyes. Further pursuit revealed that the fluorescence was derived from the grape flavor preparation added during manufacture and the fluorescence spectra of the candy and the grape flavor were quite coincident with that of methyl anthranilate. Methyl anthranilate contents in the candy and grape flavor were determined gas chromatographically to be 40.0 and 33,000 ppm, respectively, and it was calculated that the addition level of grape flavor to the candy was about 0.12%.

A Technique for Marking Small Fish with Injected Fluorescent Dyes

1970 ◽  
Vol 27 (10) ◽  
pp. 1889-1891 ◽  
Author(s):  
R. J. F. Smith
Keyword(s):  
Small Groups ◽  
Fathead Minnow ◽  
Fluorescent Dyes ◽  
Fluorescent Dye ◽  
Small Fish ◽  
Individual Fish

Individual fish or small groups of fish can be marked by injecting small amounts of fluorescent dye under the skin. This method caused no apparent injury to stickleback or to a fathead minnow. The marks produced were still visible after 8–11 months.

Sign in / Sign up

Export Citation Format

Share Document