Synthesis and Spectroscopic Properties of a Novel Bifunctional Pyrene Derivative and its Incorporation into OligoDNA

2015 ◽  
Vol 68 (2) ◽  
pp. 256 ◽  
Author(s):  
Tomohisa Moriguchi ◽  
Satomi Hida ◽  
Fumio Yoneda ◽  
Kazuo Shinozuka
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Fluorescence Spectra ◽  
Bathochromic Shift ◽  
Spectroscopic Properties ◽  
Absorption And Fluorescence Spectra ◽  
Electron Withdrawing Group

A new pyrene derivative bearing a modifiable silyl function (electron-donating group) and cyano function (electron-withdrawing group) was synthesized as a labelling agent for biological substances. The modified pyrene exhibited a marked bathochromic shift in both absorption and fluorescence spectra. The fluorescence quantum yield of the modified pyrene was also significantly increased compared with that of the unmodified pyrene. The modified pyrene was successfully incorporated into oligoDNA.

Substituted Derivatives of 10-Phenyl-9-Acetoxyanthracene. Absorption and emission spectra, quantum yield and lifetime of fluorescence

1975 ◽  
Vol 30 (5) ◽  
pp. 612-618 ◽  
Author(s):  
Janina Heidt ◽  
Józef Heidt ◽  
Janina Gronowska
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Fluorescence Spectra ◽  
Emission Spectra ◽  
Oscillator Strengths ◽  
Steric Effects ◽  
Absorption And Fluorescence Spectra ◽  
Mean Lifetime ◽  
The Mean ◽  
Derivatives Of

Abstract Absorption The absorption and fluorescence spectra of five substituted derivatives of 10-phenyl-9-acetoxy-anthracene were measured and the oscillator strengths of the 1A→1La1A→1Bb and 1A→1Cb electronic vibration bands were determined. Comparison of the absorption spectra of these compounds to the unsubstituted molecule (anthracene) indicate the presence of bathochromic and steric effects. The fluorescence quantum yield and the mean lifetime of the fluorescence were also measured.

Development of temporal spectroscopic properties for Xerogel matrices doped with Rhodamine 6G dye

Open Physics ◽  
2006 ◽  
Vol 4 (3) ◽  
Author(s):  
Abbas Al-Wattar ◽  
Baha Chiad ◽  
Wesam Twej ◽  
Sarmed Al-Awadi
Keyword(s):  
Fluorescence Spectra ◽  
Rhodamine 6G ◽  
Sol Gel ◽  
Blue Shift ◽  
Spectroscopic Properties ◽  
Dye Molecules ◽  
Absorption And Fluorescence Spectra ◽  
Silica Network ◽  
Sol Gel Process ◽  
Two Parameters

AbstractThe solid host of a laser dye modifies its spectroscopic properties with respect to its liquid host. During the Sol-Gel process the dye molecules suffer from changing their environment. Two parameters affect this matter, the change in the concentration due to the evaporation of the solvent (drying) and the caging of dye molecules inside the pores or attachment to the silica network. Rhodamine 6G absorption and fluorescence spectra with different concentrations, during Sol-Gel time processing, have been studied. Both, absorption and fluorescence spectra of the dye in the solid host, for different concentrations, show a blue-shift relative to its liquid phase.

scholarly journals Synthesis and spectroscopic properties of β-triazoloporphyrin–xanthone dyads

2015 ◽  
Vol 11 ◽  
pp. 1434-1440 ◽  
Author(s):  
Dileep Kumar Singh ◽  
Mahendra Nath
Keyword(s):  
Fluorescence Spectra ◽  
Photophysical Properties ◽  
Bathochromic Shift ◽  
Cycloaddition Reaction ◽  
Spectroscopic Characterization ◽  
Spectroscopic Properties ◽  
Dipolar Cycloaddition ◽  
Free Base ◽  
Acidic Conditions ◽  
Derivatives Of

A novel series of β-triazoloporphyrin–xanthone conjugates and xanthone-bridged β-triazoloporphyrin dyads has been synthesized in moderate to good yields through Cu(I)-catalyzed Huisgen 1,3-dipolar cycloaddition reaction of copper(II) 2-azido-5,10,15,20-tetraphenylporphyrin or zinc(II) 2-azidomethyl-5,10,15,20-tetraphenylporphyrin with various alkyne derivatives of xanthones in DMF containing CuSO4 and ascorbic acid at 80 °C. Furthermore, these metalloporphyrins underwent demetalation under acidic conditions to afford the corresponding free-base porphyrins in good to excellent yields. After successful spectroscopic characterization, these porphyrins have been evaluated for their photophysical properties. The preliminary results revealed a bathochromic shift in the UV–vis and fluorescence spectra of these porphyrin–xanthone dyads.

Synthesis, Spectroscopic Properties of Bis-Boc-L-Alanine Modified 1,8-Naphthyridine Ligand Induced by Hg2+

2015 ◽  
Vol 1089 ◽  
pp. 121-124
Author(s):  
Gao Zhang Gou ◽  
Bo Zhou ◽  
Ling Shi ◽  
Xian Lan Chen ◽  
Na Wu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Mirror Symmetry ◽  
Heavy Metal Ions ◽  
Fluorescence Spectra ◽  
Electronic Absorption Spectra ◽  
Emission Spectra ◽  
Spectroscopic Properties ◽  
Ion Source ◽  
Absorption And Fluorescence Spectra ◽  
Comprehensive Study

One Bis-Boc-L-alanine-1,8-naphthyridine ligand containing amino acid by amido bond named 2,7-Bis-Boc-L-alanine-1,8-naphthyridine (L1) was synthesized and characterized. And there absorption and fluorescence spectra in methanol is presented. It exhibits electronic absorption spectra with λmax at about 340 nm, which can be tentatively assigned to π→π* transition. The emission spectra of L1 in CH3OH shows a mirror symmetry peak with λmax at about 375 nm. Then, the comprehensive study of spectroscopic properties upon titration of L1 with heavy metal ions as ion source in CH3OH was investigated.

FLUORESCENT-SPECTROSCOPIC RESEARCH OF IN VIVO TISSUES PATHOLOGICAL CONDITIONS

2004 ◽  
Vol 18 (06) ◽  
pp. 899-910 ◽  
Author(s):  
K. M. GIRAEV ◽  
N. A. ASHURBEKOV ◽  
R. T. MEDZHIDOV
Keyword(s):  
Steady State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Fluorescence Spectra ◽  
Respiratory Activity ◽  
Functional Condition ◽  
Excitation Wavelength ◽  
Nitrogen Laser ◽  
Pathological Conditions

The steady-state spectra of autofluorescence and the reflection coefficient on the excitation wavelength of some stomach tissues in vivo with various pathological conditions (surface gastritis, displasia, cancer) are measured under excitation by the nitrogen laser irradiation (λ ex =337.1 nm ). The contour expansion of obtained fluorescence spectra into contributions of components is conducted by the Gaussian–Lorentzian curves method. It is shown that at least 7 groups of fluorophores forming a total luminescence spectrum can be distinguished during the development of displasia and tumor processes. The correlation of intensities of flavins and NAD(P)·H fluorescence is determined and the degree of respiratory activity of cells for the functional condition considered is estimated. The evaluations of the fluorescence quantum yield of the tissue's researched are given.

scholarly journals AIE/ACQ Effects in Two DR/NIR Emitters: A Structural and DFT Comparative Analysis

Molecules ◽  
2018 ◽  
Vol 23 (8) ◽  
pp. 1947 ◽  
Author(s):  
Ugo Caruso ◽  
Barbara Panunzi ◽  
Rosita Diana ◽  
Simona Concilio ◽  
Lucia Sessa ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Spectroscopic Properties ◽  
Time Dependent ◽  
Solid Materials ◽  
Solid Films ◽  
Near Ir ◽  
High Fluorescence ◽  
High Fluorescence Quantum Yield

The effects of aggregation-induced emission (AIE) and of aggregation caused quenching (ACQ) were observed and discussed on two solid materials based on a phenylenevinylene (PV) and a dicyano-PV structure. The brightest emitter in solid films shows a high fluorescence quantum yield in the deep red/near IR (DR/NIR) region (75%). The spectroscopic properties of the two crystalline solids have been described and compared in terms of crystallographic data and time dependent DFT analysis. The influence of the cyano-substituents on AIE/ACQ mechanism activation was discussed.

scholarly journals Solid-State Highly Efficient DR Mono and Poly-Dicyano-Phenylenevinylene Fluorophores

2018 ◽  
Author(s):  
Barbara Panunzi ◽  
Rosita Diana ◽  
Simona Concilio ◽  
Lucia Sessa ◽  
Rafi Shikler ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Spectroscopic Properties ◽  
Crystallographic Data ◽  
Time Dependent ◽  
Aggregation Induced Emission ◽  
Solid Films ◽  
Highly Efficient ◽  
Organic Solid

A highly efficient deep red (DR) emitting organic solid based on a dicyano-phenylenevinylene derivative was reported. The structural and spectroscopic properties of the solid have been described in terms of crystallographic data and time dependent DFT analysis. A noteworthy fluorescence quantum yield of 53% was observed for the brightest emitter cast into solid films. This result can be explained in terms of aggregation-induced emission (AIE) effect.

scholarly journals Near-Infrared Markers based on Bacterial Phytochromes with Phycocyanobilin as a Chromophore

2019 ◽  
Vol 20 (23) ◽  
pp. 6067 ◽  
Author(s):  
Olesya V. Stepanenko ◽  
Olga V. Stepanenko ◽  
Olesya G. Shpironok ◽  
Alexander V. Fonin ◽  
Irina M. Kuznetsova ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Cell Biology ◽  
Fluorescence Spectra ◽  
Near Infrared ◽  
Biological Tissues ◽  
Lower Mobility ◽  
High Fluorescence ◽  
Bacterial Phytochromes

Biomarkers engineered on the basis of bacterial phytochromes with biliverdin IXα (BV) cofactor as a chromophore are increasingly used in cell biology and biomedicine, since their absorption and fluorescence spectra lie within the so-called optical “transparency window” of biological tissues. However, the quantum yield of BV fluorescence in these biomarkers does not exceed 0.145. The task of generating biomarkers with a higher fluorescence quantum yield remains relevant. To address the problem, we proposed the use of phycocyanobilin (PCB) as a chromophore of biomarkers derived from bacterial phytochromes. In this work, we characterized the complexes of iRFP713 evolved from RpBphP2 and its mutant variants with different location of cysteine residues capable of covalent tetrapyrrole attachment with the PCB cofactor. All analyzed proteins assembled with PCB were shown to have a higher fluorescence quantum yield than the proteins assembled with BV. The iRFP713/V256C and iRFP713/C15S/V256C assembled with PCB have a particularly high quantum yield of 0.5 and 0.45, which exceeds the quantum yield of all currently available near-infrared biomarkers. Moreover, PCB has 4 times greater affinity for iRFP713/V256C and iRFP713/C15S/V256C proteins compared to BV. These data establish iRFP713/V256C and iRFP713/C15S/V256C assembled with the PCB chromophore as promising biomarkers for application in vivo. The analysis of the spectral properties of the tested biomarkers allowed for suggesting that the high-fluorescence quantum yield of the PCB chromophore can be attributed to the lower mobility of the D-ring of PCB compared to BV.

Spectroscopic properties of the Pr3+ ion in TeO2-WO3-PbO-La2O3 and TeO2-WO3-PbO-Lu2O3 glasses

Open Physics ◽  
2014 ◽  
Vol 12 (1) ◽  
Author(s):  
Bożena Burtan ◽  
Maciej Sitarz ◽  
Radosław Lisiecki ◽  
Witold Ryba-Romanowski ◽  
Piotr Jeleń ◽  
...  
Keyword(s):  
Refractive Index ◽  
Dispersion Relation ◽  
Fluorescence Spectra ◽  
Tellurite Glass ◽  
Spectroscopic Properties ◽  
Spectroscopic Studies ◽  
Luminescence Decay ◽  
Absorption And Fluorescence Spectra ◽  
Ofelt Theory ◽  
Glass Matrices

AbstractThe goal of this work was to investigate the spectroscopic properties of Pr3+ ions, embedded in two different tellurite glass matrices, TeO2-WO3-PbO-La2O3 and TeO2-WO3-PbO-Lu2O3. The absorption and fluorescence spectra have been recorded and analyzed in terms of the Judd-Ofelt theory along with the luminescence decay of the 3P0 and 1D2 levels of the Pr3+ ion. The spectroscopic studies were completed with ellipsometric measurements providing the dispersion relation of the refractive index of the investigated glasses.

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