scholarly journals Synthesis, Properties of a New (Polymer and Chalcone)

2019 ◽  
pp. 1-9
Author(s):  
Mohana Faroug Attia
Keyword(s):  
Spontaneous Emission ◽  
Fluorescence Spectra ◽  
Emission Spectra ◽  
Amplified Spontaneous Emission ◽  
Absorption And Fluorescence Spectra ◽  
Synthesis Properties ◽  
Ft Ir ◽  
Pulse Energies ◽  
Conventional Laser ◽  
Methyl Phenyl

This paper included two objectives: (i) Synthesis of Polymer {poly 2- [1- phenyl -3-(4-methyl phenyl)-4, 5-dihydropyrazole-5-yl-(4-phenoxy carbonyl)] styrene} PMDPCS and structure characterized by FT-IR, 1H-NMR spectra and Uv/Vis and XRD. (ii) Synthesis of chalcone {3-(4-(dimethylamino) phenyl)-2-phenyl-(2E) propen-1-one} (DAPPP) for absorption and fluorescence spectra under different solvents and concentrations.  Also, under various concentrations, organic solvents and pump pulse energies of Nd: YAG laser, the amplified spontaneous emission (ASE) was studied. Additionally, under the same identical conditions, the amplified spontaneous emission spectra of DAPPP in solution were compared with a conventional laser dye of coumarin 503. Finally, the gain and the fluorescence quantum yield of DAPPP were determined.

The Synthesis and Electroluminescence Properties of 4-Benzofuranyl-1,8-Naphthalimide Derivatives

2012 ◽  
Vol 557-559 ◽  
pp. 1031-1036 ◽  
Author(s):  
Jian Xin Yang ◽  
Xiang Hui Wang
Keyword(s):  
Absorption Spectra ◽  
Fluorescence Spectra ◽  
Cycloaddition Reaction ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Quantum Yields ◽  
Absorption And Fluorescence Spectra ◽  
Maximum Brightness ◽  
Maximum Emission ◽  
Mild Conditions

A series of fluorescence compounds, 4-benzofuranyl-1,8-naphthalimides, were prepared through cycloaddition reaction from 4-ethynyl-1,8-naphthalimides and o-iodophenols which catalyzed by a Pd(PPh3)2Cl2 / CuI system under mild conditions. The intermediate material, 4-ethynyl-1,8- naphthalimide, was synthesized from 4-bromo-1,8- naphthalimide and trimethylsilyl- acetylene. The absorption and fluorescence spectra of 4-benzofuranyl-1,8- naphthalimides were studied and the quantum yields were measured. The maximum UV/vis absorption spectra were in the range of 375-400 nm and the maximum emission spectra were in the range of 470-510 nm. The electro- luminescent properties were also mensurated through a doped electroluminescent device which contains 1% 1,8-naphthalimides and 99% CBP (4,4'-N,N'-dicarbazole-biphenyl), It’s shown the maximum brightness reached 3700 cd/ m2 at 22.5V.

Properties of Fluorescence Spectra and Amplified Spontaneous Emission of the Dye-Doped Film Based on Quasi-Waveguide Structure

2012 ◽  
Vol 32 (6) ◽  
pp. 0631003
Author(s):  
林豪 Lin Hao ◽  
周骏 Zhou Jun ◽  
颜承恩 Yan Cheng′en ◽  
张玲芬 Zhang Lingfen
Keyword(s):  
Spontaneous Emission ◽  
Fluorescence Spectra ◽  
Amplified Spontaneous Emission ◽  
Waveguide Structure

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.

scholarly journals Study on the interaction of Prodigiosin with bovine serum albumin by spectroscopic methods

2012 ◽  
Vol 27 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Shu-Chao Liu ◽  
Jing Tang ◽  
Xi-Hai Zhang ◽  
Yuan-Yuan Gao ◽  
Fei Ma ◽  
...  
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Fluorescence Spectra ◽  
Synchronous Fluorescence ◽  
Spectroscopic Methods ◽  
Amino Acid Residues ◽  
Absorption And Fluorescence Spectra ◽  
Ft Ir ◽  
Spectrum Experiment

The interaction between bovine serum albumin (BSA) and Prodigiosin (PG) was investigated by UV-vis absorption, fluorescence, synchronous fluorescence, FT-IR and circular dichroism (CD) techniques. The data of UV-vis absorption and fluorescence spectra displayed that there existed interaction between PG and aromatic amino acid residues of BSA. The synchronous fluorescence and CD spectrum experiment both showed that the secondary structure of BSA changed with addition of PG. All these results revealed that the conformation and microenvironment of BSA were changed.

scholarly journals Study the fluorescent and conductivity properties of a 4-hydroxy-3-nitro-1,8-naphthalic anhydride

2021 ◽  
Vol 2063 (1) ◽  
pp. 012025
Author(s):  
Roza Al-Aqar
Keyword(s):  
Ionic Conductivity ◽  
Absorption Maximum ◽  
Fluorescence Spectra ◽  
Visible Region ◽  
Emission Spectra ◽  
Solvent Polarity ◽  
Disulfonic Acid ◽  
Absorption And Fluorescence Spectra ◽  
Naphthalic Anhydride ◽  
Fluorescence Maximum

Abstract The compound of (4-hydroxy-3-nitro-1,8-naphthalic anhydride) and the dopant material (4-hydroxy-m-benzene-disulfonic acid) were synthesized. The UV-Vis absorption and fluorescence spectra of the compound were recorded. The bathochromic shifts in absorption due to the changes in the solvent polarity was observed, in DMSO solvent, the compound shows different peaks, three bands in the UV region and one band in the visible region, one absorption peak at 402 nm, which might be attributed to the (ICT) band. The emission spectra of this compound were sensitive to the solvent polarity. They moved to lower energies with increasing the polarity of the solvent. The influence of the solvent polarity on the fluorescence maximum was more pronounced compared with the absorption maximum, showing ca. 3 nm red shift on moving from butanol to DMSO. The effect of the dopant material on the conductivities (ionic and specific) of the compound was studied, the ionic conductivity was increased as the weight of the dopant material increases, and the ionic conductivity (G) was measured in water as a solvent. the (G) of the compound was 2.4X10-6 Siemens at 0.01 gm of the dopant material, and was 2.62X10-4 Siemens after the dopant material was added (0.1 gm).

scholarly journals Spectral and ASE Properties of 1-(4-Methylsulfonyl Phenyl)-3-(4-N, N Dimethyl Amino Phenyl)-2-Propen-1-One (MSPPP)

2021 ◽  
Author(s):  
Mohana University ◽  
Abdelrahman A. Elbadawi ◽  
K.H. Ibnaouf
Keyword(s):  
Quantum Yield ◽  
Spontaneous Emission ◽  
Fluorescence Spectra ◽  
Laser Excitation ◽  
Stokes Shift ◽  
Amplified Spontaneous Emission ◽  
Wavelength Band ◽  
Laser Dye ◽  
Energy Band Gap ◽  
Pulse Laser Excitation

Abstract This work demonstrates the spectral and amplified spontaneous emission (ASE) properties of a new chalcone laser dye material of 1-(4-methylsulfonyl phenyl)-3-(4-N, N dimethyl amino phenyl)-2-propen-1-one (MSPPP). The absorption, fluorescence, Stokes’ shift and quantum yield were obtained using different organic solvents. The energy band gap was calculated and compared with that of 3-[4-(dimethylamino) phenyl]-1-phenyl-(2E)-propen- 1-one (DAPPP). These include absorption, fluorescence, stokes shift, and amplified spontaneous emission (ASE). The absorption spectra of MSPPP showed a wavelength band in the range 403–427 nm, whereas the fluorescence spectra exhibited a band at 472–533 nm. ASE was observed under pump pulse laser excitation, and the wavelengths were attuned from 511 to 548 nm.

Crystallization and luminescence of Pr3+-doped CdS QDs silicate glass

2018 ◽  
Vol 13 (05) ◽  
pp. 1850064
Author(s):  
Peijing Tian ◽  
Zhe Zhang ◽  
Jian Yuan ◽  
Weihong Zheng ◽  
Hong Li ◽  
...  
Keyword(s):  
Silicate Glass ◽  
Fluorescence Spectra ◽  
Crystallization Behavior ◽  
Emission Spectra ◽  
Treatment Temperature ◽  
Absorption And Fluorescence Spectra ◽  
Fluorescence Measurements ◽  
Cds Qds ◽  
Quenching Method ◽  
Considerable Enhancement

CdS QDs (quantum dots) were precipitated in the Pr3+-doped silicate glass by the melting-quenching method. The crystallization behavior and luminescent property of the Pr3+-doped CdS QDs silicate glass were analyzed by XRD, Raman, TEM, UV–Vis–NIR scanning spectrophotometer and fluorescence spectra. It was found that with the increase in the heat-treatment temperature, the size of CdS particles increased from 2.30[Formula: see text]nm to 3.63[Formula: see text]nm, while red-shift was observed in absorption and fluorescence spectra excited at 370[Formula: see text]nm. Fluorescence measurements of the glass showed that the growth of CdS QDs induced a considerable enhancement in the emission spectra of Pr3+, and the sensitization is due to the energy transfer from CdS QDs to Pr3+ ions.

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