Studying the photophysical properties of a polymerizable 1,8-naphthalimide dye and its copolymer with styrene as potential fluorescent sensors for metal cations

2008 ◽  
Vol 19 (4) ◽  
pp. 316-321 ◽  
Author(s):  
Ivo Grabchev ◽  
Stephane Dumas ◽  
Jean-Marc Chovelon
Keyword(s):  
Photophysical Properties ◽  
Metal Cations ◽  
Fluorescent Sensors ◽  
Naphthalimide Dye

Using micelles for a new approach to fluorescent sensors for metal cations

2004 ◽  
pp. 1650-1651 ◽  
Author(s):  
Yuri Diaz Fernandez ◽  
Aurora Pérez Gramatges ◽  
Valeria Amendola ◽  
Francesco Foti ◽  
Carlo Mangano ◽  
...  
Keyword(s):  
Metal Cations ◽  
Fluorescent Sensors ◽  
New Approach

scholarly journals Coumarin-Based Profluorescent and Fluorescent Substrates for Determining Xenobiotic-Metabolizing Enzyme Activities In Vitro

2020 ◽  
Vol 21 (13) ◽  
pp. 4708
Author(s):  
Hannu Raunio ◽  
Olli Pentikäinen ◽  
Risto O. Juvonen
Keyword(s):  
Enzyme Activities ◽  
Biological Activities ◽  
Photophysical Properties ◽  
Fluorescent Sensors ◽  
Enzyme Assays ◽  
Highly Sensitive ◽  
Metabolizing Enzyme ◽  
Transfer Properties

in vivo methods, such as spectrophotometric, fluorometric, mass spectrometric,and radioactivity-based techniques. In fluorescence-based assays, the reaction produces a fluorescentproduct from a nonfluorescent substrate or vice versa. Fluorescence-based enzyme assays areusually highly sensitive and specific, allowing measurements on small specimens of tissues withlow enzyme activities. Fluorescence assays are also amenable to miniaturization of the reactionmixtures and can thus be done in high throughput. 7-Hydroxycoumarin and its derivatives arewidely used as fluorophores due to their desirable photophysical properties. They possess a large -conjugated system with electron-rich and charge transfer properties. This conjugated structure leadsto applications of 7-hydroxycoumarins as fluorescent sensors for biological activities. We describe inthis review historical highlights and current use of coumarins and their derivatives in evaluatingactivities of the major types of xenobiotic-metabolizing enzyme systems. Traditionally, coumarinsubstrates have been used to measure oxidative activities of cytochrome P450 (CYP) enzymes. For thispurpose, profluorescent coumarins are very sensitive, but generally lack selectivity for individual CYPforms. With the aid of molecular modeling, we have recently described several new coumarin-basedsubstrates for measuring activities of CYP and conjugating enzymes with improved selectivity.

scholarly journals Photophysical and Photochemical Properties of Green Fluorescent Liquid Crystalline Systems

2003 ◽  
Vol 58 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Ivo Grabchev ◽  
Jean-Marc Chovelon
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Liquid Crystalline ◽  
Photophysical Properties ◽  
Orientational Order ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed ◽  
Photochemical Properties ◽  
Green Fluorescent ◽  
Naphthalimide Dye

The photophysical properties of polymer-dispersed liquid crystal systems, containing naphthalimide dye as fluorescent units are reported. Investigations have been carried out on some 1,8- naphtalimide derivatives both in isotropic and anisotropic media, and their photophysal properties have been described. The orientational order parameters of the dyes in nematic liquid crystal ZLI 1840 have been determined. The photostability of the dye/liquid crystal systems has been investigated and the effect that the substituents in the naphthalimide structure have upon the orientation of the dye was discussed.

Novel Cyclometalated Iridium(III) Xanthate Complexes and Their Phosphorescence Behavior in the Presence of Metal Ions

2012 ◽  
Vol 67 (9) ◽  
pp. 865-871
Author(s):  
Bihai Tong ◽  
Yaqing Xu ◽  
Jiayan Qiang ◽  
Man Zhang ◽  
Qunbo Mei ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Metal Ions ◽  
Single Crystal ◽  
Photophysical Properties ◽  
Metal Cations ◽  
X Ray Diffraction ◽  
Red Emission ◽  
X Ray ◽  
Emission Lifetime ◽  
Phosphorescence Quantum Yield

Two cyclometalated iridium(III) complexes, Ir(dpppz)(ppz)(ipx) and Ir(ppz)2(ipx) (dpppzH=1- (2,6-dimethylphenoxy)-4-phenylphthalazine, ppzH=4-phenylphthalazinone, ipx=isopropyl xanthate), have been synthesized and characterized by single-crystal X-ray diffraction. The photophysical properties of the two complexes were also investigated. Ir(dpppz)(ppz)(ipx) shows orange-red emission at around 606 nm with a phosphorescence quantum yield of ca. 0.0032 and an emission lifetime of 188 ns, while Ir(ppz)2(ipx) shows orange-red emission at around 599 nm with a phosphorescence quantum yield of ca. 0.00318 and an emission lifetime of 259 ns. The phosphorescence behavior of Ir(ppz)2(ipx) towards different metal cations has also be studied. Its strong phosphorescence is quenched by Hg2+, Cu2+ and Ag+ cations. The interaction ratio with Hg2+ is 1:1

Fluorescence Chemosensors Based on Intramolecular Charge Transfer and Intramolecular Energy Transfer

2012 ◽  
Vol 441 ◽  
pp. 783-783 ◽  
Author(s):  
Xiao Jun Peng
Keyword(s):  
Fluorescence Microscopy ◽  
Fluorescence Spectra ◽  
Photophysical Properties ◽  
Visible Region ◽  
Chemical Properties ◽  
Fluorescent Sensors ◽  
Similar Chemical ◽  
Target Molecules ◽  
Photo Stability ◽  
Vinyl Group

Ratiometric fluorescent sensors which based on ICT mechanism permit signal rationing to detect target molecules by measuring the ratio of fluorescence intensities at two different wavelengths, which are autoemitted by sensors upon binding objects. The autoreferential function of relative changes of two fluorescence intensities may avoid the influences of many nontarget factors in the changes of monofluorescence intensity. Therefore, the design of ratiometric fluorescent sensors is of great current interest. Generally, Cd2+ and Zn2+ havevery similar chemical properties, so the discrimination of them is very difficult.In sensor 1, we chose boradiazaindacene (BODIPY) as the fluorophore because it absorbs and emits in the visible region with high quantum yield, large extinction coefficient and good photo-stability,and N, N-bis(pyridin-2-ylmethyl)benzenamine as Cd2+ receptor. A vinyl group between the receptor and BODIPY fluorophore can induce red-shifts in absorption and fluorescence spectra. When Cd2+ is added into the aqueous solution of 1, owing to the reduction of the electron-donating character of the receptor, the photophysical properties of BODIPY will consequently be changed. In fact, 1 can distinguish Cd2+ from Zn2+ and especially can be used in both general fluorescence microscopy and ratiometric fluorescence microscopy.

scholarly journals Optical Chemosensors for Cations Based on 1,8-Naphthalimide Derivatives

INEOS OPEN ◽  
2021 ◽  
Vol 5 ◽  
Author(s):  
M. A. Pavlova ◽  
◽  
P. A. Panchenko ◽  
Keyword(s):  
Metal Cations ◽  
Optical Signal ◽  
Fluorescent Sensors ◽  
Optical Chemosensors

This review presents the examples of fluorescent sensors for metal cations based on a 1,8-naphthalimide optical platform and covers the main advances in this field for the last decade. The mechanisms of the generation of an optical signal are discussed in detail. Special attention is given to the authors' own works.

Dansylated Polyamines as Fluorescent Sensors for Metal Ions: Photophysical Properties and Stability of Copper(II) Complexes in Solution

2001 ◽  
Vol 84 (3) ◽  
pp. 690-706 ◽  
Author(s):  
Luca Prodi ◽  
Marco Montalti ◽  
Nelsi Zaccheroni ◽  
Francesco Dallavalle ◽  
Guiseppina Folesani ◽  
...  
Keyword(s):  
Metal Ions ◽  
Photophysical Properties ◽  
Fluorescent Sensors

Theoretical study on phthalocynine-Fe(II)-based fluorescent sensors for cyanide anion

2014 ◽  
Vol 13 (01) ◽  
pp. 1450006 ◽  
Author(s):  
Guang-Yue Li ◽  
Wen-Liang Li ◽  
Hang Zhang ◽  
Xiao-Ran Sun
Keyword(s):  
Photophysical Properties ◽  
Method Comparison ◽  
Fluorescent Sensors ◽  
Frontier Molecular Orbital ◽  
Energy Calculation ◽  
Cyanide Anion ◽  
Binding Energy Calculation ◽  
Molecular Orbital Analysis ◽  
Sensor Molecules ◽  
Tddft Method

Three fluorescent sensors bearing phthalocynine- Fe ( II ) moiety were designed specifically for detecting cyanide anions, and investigated by DFT/TDDFT method. Comparison of the geometrical and photophysical properties of these sensor molecules, equipped with H -, carbamoyl and phthalimino groups, provided a deep insight into the sensor–cyanide interactions. The binding energy calculation shows that all the three sensors have good selectivity to the cyanide anion. Especially, frontier molecular orbital analysis confirmed that there was a photoinduced electron transfer (PET) process in the sensor with phthalimino group upon the addition of cyanide anion. This process could cause the fluorescence change. As a result, the sensor with phthalimino group displayed several favorable sensing properties.

Influence of Large Metal Cations on the Photophysical Properties of Texaphyrin, a Rigid Aromatic Chromophore

2000 ◽  
Vol 122 (34) ◽  
pp. 8289-8298 ◽  
Author(s):  
Dirk M. Guldi ◽  
Tarak D. Mody ◽  
Nikolay N. Gerasimchuk ◽  
Darren Magda ◽  
Jonathan L. Sessler
Keyword(s):  
Photophysical Properties ◽  
Metal Cations
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