Highly efficient nitrate ester explosive vapor probe based on multiple triphenylaminopyrenyl-substituted POSS

2015 ◽  
Vol 3 (9) ◽  
pp. 4820-4826 ◽  
Author(s):  
Yixun Gao ◽  
Wei Xu ◽  
Defeng Zhu ◽  
Lei Chen ◽  
Yanyan Fu ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Nitrate Ester ◽  
Highly Efficient ◽  
Quenching Efficiency

With nano and polar POSS core and eight luminescent branches, P8PT presents excellent fluorescence quenching efficiency for nitroglycerin vapor.

scholarly journals Detection of nitroaromatic vapours with diketopyrrolopyrrole thin films: exploring the role of structural order and morphology on thin film properties and fluorescence quenching efficiency

2015 ◽  
Vol 51 (6) ◽  
pp. 1143-1146 ◽  
Author(s):  
Monika Warzecha ◽  
Jesus Calvo-Castro ◽  
Alan R. Kennedy ◽  
Alisdair N. Macpherson ◽  
Kenneth Shankland ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Fluorescence Quenching ◽  
Optical Detection ◽  
Film Properties ◽  
Structural Order ◽  
Quenching Efficiency ◽  
First Time

Sensitive optical detection of nitroaromatic vapours with diketopyrrolopyrrole thin films is reported for the first time.

Phase-Dependent Fluorescence Quenching Efficiency of MoS2 Nanosheets and Their Applications in Multiplex Target Biosensing

2018 ◽  
Vol 10 (49) ◽  
pp. 42009-42017 ◽  
Author(s):  
Lingyi Lan ◽  
Danke Chen ◽  
Yao Yao ◽  
Xinsheng Peng ◽  
Jian Wu ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Mos2 Nanosheets ◽  
Quenching Efficiency

Improve the fluorescence quenching efficiency of gold nanorod by silver coating

2013 ◽  
Vol 103 (19) ◽  
pp. 193703 ◽  
Author(s):  
Fan Zhang ◽  
Jian Zhu ◽  
Jian-Jun Li ◽  
Jun-Wu Zhao
Keyword(s):  
Fluorescence Quenching ◽  
Gold Nanorod ◽  
Silver Coating ◽  
Quenching Efficiency

The binding and fluorescence quenching efficiency of nitroaromatic (explosive) vapors in fluorescent carbazole dendrimer thin films

2013 ◽  
Vol 15 (24) ◽  
pp. 9845 ◽  
Author(s):  
Paul E. Shaw ◽  
Hamish Cavaye ◽  
Simon S. Y. Chen ◽  
Michael James ◽  
Ian R. Gentle ◽  
...  
Keyword(s):  
Thin Films ◽  
Fluorescence Quenching ◽  
Quenching Efficiency ◽  
Nitroaromatic Explosive

scholarly journals Molecularly Imprinted Silica-Coated CdTe Quantum Dots for Fluorometric Determination of Trace Chloramphenicol

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5965
Author(s):  
Xiaoxiao Chen ◽  
Yang Liu ◽  
Pu Li ◽  
Yichen Xing ◽  
Chaobiao Huang
Keyword(s):  
Quantum Dots ◽  
Fluorescence Quenching ◽  
Limit Of Detection ◽  
Recognition System ◽  
Electron Transfer Reaction ◽  
Trace Detection ◽  
Molecularly Imprinted ◽  
Specific Recognition ◽  
Quenching Efficiency ◽  
Photo Induced Electron Transfer

A dual recognition system with a fluorescence quenching of quantum dots (QDs) and specific recognition of molecularly imprinted polymer (MIP) for the detection of chloramphenicol (CAP) was constructed. MIP@SiO2@QDs was prepared by reverse microemulsion method with 3-aminopropyltriethoxysilane (APTS), tetraethyl orthosilicate (TEOS) and QDs being used as the functional monomer, cross-linker and signal sources, respectively. MIP can specifically recognize CAP, and the fluorescence of QDs can be quenched by CAP due to the photo-induced electron transfer reaction between CAP and QDs. Thus, a method for the trace detection of CAP based on MIP@SiO2@QDs fluorescence quenching was established. The fluorescence quenching efficiency of MIP@SiO2@QDs displayed a desirable linear response to the concentration of CAP in the range of 1.00~4.00 × 102 μmol × L−1, and the limit of detection was 0.35 μmol × L−1 (3σ, n = 9). Importantly, MIP@SiO2@QDs presented good detection selectivity owing to specific recognition for CAP, and was successfully applied to quantify CAP in lake water with the recovery ranging 102.0~104.0%, suggesting this method has the promising potential for the on-site detection of CAP in environmental waters.

Enhancement of the Fluorescence Quenching Efficiency of DPPH• on Colloidal Nanocrystalline Quantum Dots in Aqueous Micelles

2011 ◽  
Vol 21 (5) ◽  
pp. 1941-1949 ◽  
Author(s):  
Tuanjai Noipa ◽  
Surangkhana Martwiset ◽  
Nutthaya Butwong ◽  
Thawatchai Tuntulani ◽  
Wittaya Ngeontae
Keyword(s):  
Quantum Dots ◽  
Fluorescence Quenching ◽  
Quenching Efficiency ◽  
Aqueous Micelles

Fluorescence quenching of Safranine T by inorganic anions in Tween micelles

2005 ◽  
Vol 83 (12) ◽  
pp. 2067-2072 ◽  
Author(s):  
Stephanie A Moore ◽  
Sarah E Moore ◽  
Karen M Glenn ◽  
Subhash C Bhattacharya ◽  
Rama M Palepu
Keyword(s):  
Fluorescence Quenching ◽  
Inorganic Anions ◽  
Tween 20 ◽  
Micellar Media ◽  
Collisional Quenching ◽  
Quenching Rate ◽  
Photophysical Process ◽  
Iodide Ion ◽  
Safranine T ◽  
Quenching Efficiency

The fluorescence quenching of the dye Safranine T by various inorganic anions such as [Fe(CN6)]–3, [Fe(CN6)]–4, I–, Br–, NO2–, and N3– in aqueous solution and in nonionic micellar solutions of Tweens (Tween 20, Tween 40, and Tween 80) was studied. The Stern–Volmer quenching constants and quenching rate constants were evaluated. Compared to the quenching efficiency in aqueous media, that of the micellar media was found to be lower, except when iodide ion was used as a quencher. With the exception of the iodide ion, it has been established that collisional quenching plays a major role in the photophysical process. In the case of the iodide ion, both static and collisional quenching processes play a major role, owing to the complexation of iodide ion with Tween micelles. The Stern–Volmer quenching constants were found to be dependent on the ionic strength of the medium.Key words: fluorescence, static quenching, Tweens, Stern–Volmer constant, micellar media.

Manipulating fluorescence quenching efficiency of graphene by defect engineering

2016 ◽  
Vol 9 (5) ◽  
pp. 055502 ◽  
Author(s):  
Xitao Guo ◽  
Amina Zafar ◽  
Haiyan Nan ◽  
Yuanfang Yu ◽  
Weiwei Zhao ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Defect Engineering ◽  
Quenching Efficiency
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