scholarly journals Assessment of EtQxBox complexation in solution by steady-state and time-resolved fluorescence spectroscopy

RSC Advances ◽  
2018 ◽  
Vol 8 (29) ◽  
pp. 16314-16318
Author(s):  
Arianna Aprile ◽  
Giovanna Palermo ◽  
Antonio De Luca ◽  
Roberta Pinalli ◽  
Enrico Dalcanale ◽  
...  
Keyword(s):  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Dynamic Quenching ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Static And Dynamic Quenching

We investigate the role of combined static and dynamic quenching in fluorescence transduction of benzonitrile and acetonitrile complexation by a rigid quinoxaline-based cavitand.

Parvalbumin conformers revealed by steady-state and time-resolved fluorescence spectroscopy

1985 ◽  
Vol 240 (2) ◽  
pp. 781-791 ◽  
Author(s):  
E.A. Permyakov ◽  
A.V. Ostrovsky ◽  
E.A. Burstein ◽  
P.G. Pleshanov ◽  
Ch. Gerday
Keyword(s):  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Time Resolved Fluorescence ◽  
Time Resolved

scholarly journals Fluorescent chemosensors for metal ions based on 3-(2-benzoxazol-5-yl)alanine skeleton

2010 ◽  
Vol 8 (3) ◽  
pp. 674-686 ◽  
Author(s):  
Magda Milewska ◽  
Katarzyna Guzow ◽  
Wiesław Wiczk
Keyword(s):  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Metal Ions ◽  
Ground State ◽  
Transition Metal Ions ◽  
Fluorescent Chemosensors ◽  
Time Resolved Fluorescence ◽  
Absorption Bands ◽  
Time Resolved ◽  
Ratiometric Sensors

AbstractThe ability of new chelate ligands, benzoxazol-5-yl-alanine derivatives substituted in position 2 by heteroaromatic substituent, to form complexes with selected metal ions in acetonitrile are studied by means of absorption and steady-state and time-resolved fluorescence spectroscopy. Among the ligands studied, only azaaromatic derivatives form stable complexes with transition metal ions in the ground state. Their absorption bands are bathochromically shifted enabling to use those ligands as ratiometric sensors. The fluorescence of each ligand is quenched by metal ions, however, in the presence of Cd(II) and Zn(II) ions a new red shifted emission band is observed.

Characterization of Plasma-Modified Fluoropolymer Surfaces Using Steady-State and Time-Resolved Fluorescence Spectroscopy

1994 ◽  
Vol 48 (5) ◽  
pp. 630-637 ◽  
Author(s):  
Ming Li ◽  
Michaeleen L. Pacholski ◽  
Frank V. Bright
Keyword(s):  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Sulfonyl Chloride ◽  
Sodium Dodecylsulfate ◽  
Covalent Immobilization ◽  
Ambient Conditions ◽  
Time Resolved Fluorescence ◽  
Decay Kinetics ◽  
Time Resolved

Poly(hexafluoropropylene-co-tetrafluoroethylene) (FEP) has been widely used in biotechnology because of its unique surface properties and biocompatibility. Recent work from our group has shown that plasma discharge-modified FEP can be used as the substratum for development of a very stable immunosensor. This result has prompted us to study further this new surface under ambient conditions. In this paper, we report on the covalent immobilization of a pyrene residue (-Py) onto FEP-APS (FEP-aminopropyl silane) surfaces and the characterization of FEP-APS-Py using steady-state and time-resolved fluorescence spectroscopy. Among the immobilization schemes tested, we found that the covalent coupling of pyrene-sulfonyl chloride to FEP-APS is the easiest and yields the most photostable FEP-APS-Py derivative. Steady-state emission spectra of FEP-APS-Py in contact with H2O, β-cyclodextrin (β-CD), and sodium dodecylsulfate (SDS) aqueous solutions differ considerably from those of Py-SO3 in solution. Time-resolved fluorescence spectroscopy of FEP-APS-Py demonstrates that the decay kinetics are strongly affected by the presence of ionic quenchers and molecular oxygen, as well as β-CD and SDS. The results are consistent with the suggestion that the APS-Py moiety undergoes a slow time-dependent reconfiguration at the FEP/APS interface.

Spectral and Photoprototropic Characteristics of 4-Aminobiphenyl in β-Cyclodextrin

2004 ◽  
Vol 69 (4) ◽  
pp. 748-758 ◽  
Author(s):  
Israel V. Muthu Vijayan Enoch ◽  
Meenakshisundaram Swaminathan
Keyword(s):  
Excited State ◽  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Inclusion Complex ◽  
Ground State ◽  
Time Resolved Fluorescence ◽  
Neutral Form ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

The photophysical and photoprototropic behaviour of 4-aminobiphenyl (4ABP) in aqueous β-cyclodextrin (β-CDx) solution has been investigated using steady-state and time-resolved fluorescence spectroscopy. Fluorescence of the neutral form of 4ABP is enhanced due to the formation of a 1:1 complex with β-CDx. The formation of this complex has been confirmed by time-resolved spectroscopy. In the presence of β-CDx, no change was observed in the ground state pKa value but the excited state pKa value changed. Based on its photophysical and photoprototropic characteristics in β-CDx, the structure of the 1:1 inclusion complex is proposed.

Excited-state intramolecular proton transfer and conformational relaxation in 4′-N,N-dimethylamino-3-hydroxyflavone doped in acetonitrile crystals

2016 ◽  
Vol 18 (41) ◽  
pp. 28564-28575 ◽  
Author(s):  
Kazuki Furukawa ◽  
Norifumi Yamamoto ◽  
Kazuyuki Hino ◽  
Hiroshi Sekiya
Keyword(s):  
Excited State ◽  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Conformational Relaxation ◽  
Excited State Dynamics

Excited-state dynamics of 4′-N,N-dimethylamino-3-hydroxyflavone doped in acetonitrile crystals has been investigated by using steady-state and time-resolved fluorescence spectroscopy.

Role of Polyplex Intermediate Species on Gene Transfer Efficiency: Polyethylenimine−DNA Complexes and Time-Resolved Fluorescence Spectroscopy

2011 ◽  
Vol 115 (8) ◽  
pp. 1895-1902 ◽  
Author(s):  
Tiia-Maaria Ketola ◽  
Martina Hanzlíková ◽  
Arto Urtti ◽  
Helge Lemmetyinen ◽  
Marjo Yliperttula ◽  
...  
Keyword(s):  
Gene Transfer ◽  
Fluorescence Spectroscopy ◽  
Transfer Efficiency ◽  
Intermediate Species ◽  
Time Resolved Fluorescence ◽  
Dna Complexes ◽  
Time Resolved ◽  
Gene Transfer Efficiency

Selective steady-state and time-resolved fluorescence spectroscopy of an HLA-A2-peptide complex

1995 ◽  
Vol 44 (2-3) ◽  
pp. 195-201 ◽  
Author(s):  
Dmitry M. Gakamsky ◽  
Elisha Haas ◽  
Penelope Robbins ◽  
Jack L. Strominger ◽  
Israel Pecht
Keyword(s):  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Peptide Complex
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