Iodide fluorescence quenching of sol-gel immobilized BSA

1996 ◽  
Vol 7 (1-2) ◽  
pp. 53-57 ◽  
Author(s):  
Carol L. Wambolt ◽  
S. Scott Saavedra
Keyword(s):  
Fluorescence Quenching ◽  
Sol Gel

scholarly journals Carbon Quantum Dots Encapsulated Molecularly Imprinted Fluorescence Quenching Particles for Sensitive Detection of Zearalenone in Corn Sample

Toxins ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 438 ◽  
Author(s):  
Manyu Shao ◽  
Ming Yao ◽  
Sarah De Saeger ◽  
Liping Yan ◽  
Suquan Song
Keyword(s):  
Quantum Dots ◽  
Fluorescence Quenching ◽  
Sol Gel ◽  
Carbon Quantum Dots ◽  
Detection Range ◽  
Molecularly Imprinted ◽  
Relative Standard ◽  
Sol Gel Process ◽  
One Step ◽  
Optimized Conditions

An eco-friendly and efficient one-step approach for the synthesis of carbon quantum dots (CDs) that encapsulated molecularly imprinted fluorescence quenching particles (MIFQP) and their application for the determination of zearalenone (ZEA) in a cereal sample are described in this study. CDs with high luminescence were first synthesized, and then encapsulated in the silica-based matrix through a non-hydrolytic sol-gel process. The resulting ZEA-imprinted particles exhibited not only an excellent specific molecular recognition of ZEA, but also good photostability and obvious template binding-induced fluorescence quenching. Under the optimized conditions, the fluorescence intensity of MIFQP was inversely proportional to the concentration of ZEA. By validation, the detection range of these fluorescence quenching materials for ZEA was between 0.02 and 1.0 mg L−1, and the detection limit was 0.02 mg L−1 (S/N = 3). Finally, the MIFQP sensor was successfully applied for ZEA determination in corn with recoveries from 78% to 105% and the relative standard deviation (RSD %) was lower than 20%, which suggests its potential in actual applications.

Photophysical Properties of Carbazole Derivative DPSPC Doped Composite Glass

2011 ◽  
Vol 239-242 ◽  
pp. 1006-1009
Author(s):  
Yun Long Deng ◽  
Yun Hui Sun ◽  
Du Xia Cao ◽  
Ying Chen ◽  
Zhi Qiang Liu
Keyword(s):  
Fluorescence Quenching ◽  
Methyl Methacrylate ◽  
Photophysical Properties ◽  
Sol Gel ◽  
Organic Dye ◽  
Fluorescence Properties ◽  
Donor Group ◽  
Carbazole Derivative ◽  
Composite Glass ◽  
Gel Glasses

A D-π-D type of organic dye 2,7-di[4-(N,N-diphenylamino)styryl]-9-n-pentyl-9H- carbazole (DPSPC) with diphenylamine as donor group and styrene-carbazole-styrene as conjugation bridge has been synthesized. The photophysical properties of the dye in different solvents and poly methyl methacrylate/organic modified sol-gel glasses are researched. The results indicate that the fluorescence properties of the organic dye in composite glass increase relative to that in solvents and there are no fluorescence quenching in high doped concentration in composite glass matrixes. The dye has higher stability in the composite glass than that in solution.

Features of diffusion-controlled bimolecular reaction of fluorescence quenching in sol-gel-xerogel transitions

1998 ◽  
Vol 34 (2) ◽  
pp. 111-114
Author(s):  
V. P. Kondilenko ◽  
I. G. Tarasov ◽  
A. M. Eremenko ◽  
J. M. G. Martinho ◽  
L. Ilharco
Keyword(s):  
Fluorescence Quenching ◽  
Sol Gel ◽  
Bimolecular Reaction ◽  
Diffusion Controlled

Fibre optic oxygen sensor based on fluorescence quenching of evanescent-wave excited ruthenium complexes in sol–gel derived porous coatings

The Analyst ◽  
1993 ◽  
Vol 118 (4) ◽  
pp. 385-388 ◽  
Author(s):  
Brian D. MacCraith ◽  
Colette M. McDonagh ◽  
Gerard O'Keeffe ◽  
Emmetine T. Keyes ◽  
Johannes G. Vos ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Evanescent Wave ◽  
Oxygen Sensor ◽  
Sol Gel ◽  
Ruthenium Complexes ◽  
Fibre Optic ◽  
Porous Coatings
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