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.

scholarly journals Calculation of vibrationally resolved absorption and fluorescence spectra of the rylenes

2020 ◽  
Vol 22 (4) ◽  
pp. 2379-2385 ◽  
Author(s):  
Jonas Greiner ◽  
Dage Sundholm
Keyword(s):  
Excellent Agreement ◽  
Generating Function ◽  
Function Method ◽  
Fluorescence Spectra ◽  
Emission Spectra ◽  
Absorption And Fluorescence Spectra ◽  
Absorption And Emission ◽  
Absorption And Emission Spectra

A generating function method was used to simulate the vibrationally resolved absorption and emission spectra of perylene, terrylene and quaterrylene. The calculated spectra are found to be in excellent agreement with the experimental ones.

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).

Synthesis of novel push-pull fluorescent dyes – 7-(diethylamino)furo[3,2-c]coumarin and 7-(diethylamino)thieno[3,2-c]coumarin derivatives

2018 ◽  
Vol 24 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Igor O. Akchurin ◽  
Anna I. Yakhutina ◽  
Andrei Y. Bochkov ◽  
Natalya P. Solovjova ◽  
Valerii F. Traven
Keyword(s):  
Absorption Spectra ◽  
Fluorescent Dyes ◽  
Emission Spectra ◽  
Coumarin Derivatives ◽  
Electron Absorption Spectra ◽  
Absorption And Emission ◽  
Electron Absorption ◽  
Absorption And Emission Spectra ◽  
Derivatives Of

AbstractNovel push-pull fluorescent dyes, 7-(diethylamino)furo[3,2-c]coumarin and 7-(diethylamino)thieno[3,2-c]coumarin derivatives, were designed and synthesized using formyl derivatives of furo- and thieno[3,2-c]coumarins as key intermediates. Electron absorption and emission spectra of the dyes were recorded in different solvents. The longest-wave bands in the electron absorption spectra of the dyes are suggested to be of push-pull nature.

scholarly journals Aromaticity and photophysics of tetrasila- and tetragerma-annelated tetrathienylenes as new representatives of the hetero[8]circulene family

2019 ◽  
Vol 21 (18) ◽  
pp. 9246-9254 ◽  
Author(s):  
G. V. Baryshnikov ◽  
R. R. Valiev ◽  
V. N. Cherepanov ◽  
N. N. Karaush-Karmazin ◽  
V. A. Minaeva ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Emission Spectra ◽  
Absorption And Emission ◽  
Absorption And Emission Spectra ◽  
Photophysical Behavior

The electronic structure, absorption and emission spectra, aromaticity and photophysical behavior of the recently synthesized tetrasilatetrathia[8]circulene and tetragermatetrathia[8]circulene compounds have been studied computationally.

A phthalocyanine-based fluorescent sensor for Zn2+ ion

2013 ◽  
Vol 17 (01n02) ◽  
pp. 99-103 ◽  
Author(s):  
Hui He ◽  
Jian-Yong Liu ◽  
Dennis K.P. Ng
Keyword(s):  
Metal Ions ◽  
Spectral Properties ◽  
Fluorescence Spectra ◽  
Near Infrared ◽  
Fluorescent Sensor ◽  
High Sensitivity ◽  
Absorption And Fluorescence Spectra

This paper describes the preparation and spectral properties of a near-infrared fluorophore in which two bis(2-picolyl)amino moieties are axially linked to a silicon(IV) phthalocyanine core. The effects of various metal ions on its absorption and fluorescence spectra have been examined. The results indicate that this compound shows a high sensitivity and moderate selectivity toward Zn2+ ion.

Fine structure of the absorption and emission spectra of NI2+-ions in BALiF3

1995 ◽  
Vol 135 (1-4) ◽  
pp. 15-18 ◽  
Author(s):  
E. Martins ◽  
S. L. Baldochi ◽  
S. P. Morato ◽  
N. D. Vieira ◽  
A. Luci ◽  
...  
Keyword(s):  
Fine Structure ◽  
Emission Spectra ◽  
Absorption And Emission ◽  
Absorption And Emission Spectra

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.

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