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.

Synthesis, Spectroscopic Properties of Bis-Boc-L-alanine Modified 1,8-Naphthyridine Ligand Induced by Cr3+

2014 ◽  
Vol 716-717 ◽  
pp. 163-166
Author(s):  
Gao Zhang Gou ◽  
Bo Zhou ◽  
Ling Shi ◽  
Na Wu ◽  
Xian Lan Chen ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Amino Acid ◽  
Metal Ions ◽  
Fluorescent Probe ◽  
Heavy Metal Ions ◽  
Fluorescence 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. Then, the comprehensive study of spectroscopic properties upon titration of L1 with heavy metal ions as ion source in CH3OH was investigated. It shows compound L1 can use as a fluorescent probe for heavy metal ions like Cr3+.

Influence of Internal Heavy Atoms on the Spectroscopic Properties of 9-Acetoxy-10-Phenylanthracene Derivatives

1984 ◽  
Vol 39 (10) ◽  
pp. 952-959 ◽  
Author(s):  
Janina R. Heidt
Keyword(s):  
Mirror Symmetry ◽  
Fluorescence Spectra ◽  
Spectroscopic Properties ◽  
Quantum Yields ◽  
Absorption And Fluorescence Spectra ◽  
Fluorescence Quantum Yields ◽  
Heavy Atoms ◽  
Decay Times ◽  
Anthracene Derivatives ◽  
Derivatives Of

Abstract Absorption and fluorescence spectra, fluorescence quantum yields and decay times have been measured for new derivatives of 9-acetoxy-10-acetoxyhalogenophenylanthracene in dioxane. It is found that the strength of the absorption transition decreases with increases atomic number Z of the halogen substituent whereas the strength of the fluorescence transition is constant with the exception for the fluoro-substituted derivatives. The loss of mirror symmetry between the absorption and fluorescence spectra is more evident for the 10-(4-acetoxy-3'-halogenophenyl)anthracene derivatives than for the remaining compounds. The determined nonradiative electronic relaxation rate constant and "dark reactions" quantum yield increases with increasing Z value. These findings are explained on the basis of the spin-orbit coupling enlarged by the heavy substituent and through perturbation of the functional groups, which causes different changes of the molecular geometries in the S0 and S*1 states, respectively.

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.

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.

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.

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).

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.

Luminescence and Laser Properties of the 10-Phenyl-9-acetoxyanthracene Derivatives

1983 ◽  
Vol 38 (11) ◽  
pp. 1197-1205 ◽  
Author(s):  
Janina R. Heidt
Keyword(s):  
Functional Groups ◽  
Phenyl Ring ◽  
Mirror Symmetry ◽  
Fluorescence Spectra ◽  
Stokes Shift ◽  
Laser Action ◽  
Emission Spectra ◽  
Threshold Power ◽  
Relative Value ◽  
Gain Spectra

Absorption and fluorescence spectra, fluorescence quantum yield and decay time have been measured for eight new 10-phenyl-9-acetoxyanthracene derivatives. It is found that the strength of the absorption transition is independent of the phenyl and anthracene substitution, whereas the strength of the fluorescence transition depends more on the functional groups substituted in the anthracene ring then in the phenyl ring. The loss of mirror symmetry between the absorption and emission spectra and the large values of the Stokes shift suggest that, due to perturbation of the functional groups, the molecular geometries of the S0 and S*1 states are different.The investigated compounds show laser action. The relative value of the absorption threshold power, the gain spectra and the lasing region have been determined. It is found that the amplified spontaneous emission and gain spectra depend on the interaction of the substituted phenyl ring with the π-electrons of the anthracene ring

Proton-Induced Multiple Changes of the Absorption and Fluorescence Spectra of Amino-Aza-Oligo(Phenylenevinylene)s

2008 ◽  
Vol 55 ◽  
pp. 36-41 ◽  
Author(s):  
Volker Schmitt ◽  
Stefan Glang ◽  
Jasmin Preis ◽  
Heiner Detert
Keyword(s):  
Fluorescence Spectra ◽  
Fluorescent Dyes ◽  
Aldol Condensation ◽  
Emission Spectra ◽  
Solvent Polarity ◽  
High Sensitivity ◽  
Optical Spectra ◽  
Absorption And Fluorescence Spectra ◽  
Absorption And Emission ◽  
Absorption And Emission Spectra

Fluorescent dyes with a high sensitivity of their optical spectra towards changes of the environment were prepared via aldol condensation or Horner olefinations. The main chromophore is a quadrupolar N-substituted 1,4-distyrylbenzene which allows protonation and complexation at various positions resulting in a series of different and significant changes of the optical spectra. The sensitivity of the absorption and emission spectra on solvent polarity, acid, and cations is reported.

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