Trans-4-[4-(dimethylamino)styryl]-1-methylpyridinium Iodide@Hemimethylcucurbit[6]uril Fluorescent Probe for Anion Recognition

2019 ◽  
Vol 72 (7) ◽  
pp. 533 ◽  
Author(s):  
Sai Huang ◽  
Mei Yang ◽  
Xin-Yu Deng ◽  
Qian Jiang Zhu ◽  
Ying Huang ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Fluorescent Probe ◽  
Systematic Study ◽  
Anion Recognition ◽  
Fluorescence Emission ◽  
Inorganic Anions ◽  
Strong Fluorescence ◽  
Interaction System ◽  
Hemicyanine Dye ◽  
Guest System

In the present work, a host–guest system of a hemimethyl-substituted cucurbit[6]uril derived from 3α-methyl-glycoluril (HMeQ[6]) and a hemicyanine dye, trans-4-[4-(dimethylamino)styryl]-1-methylpyridinium iodide (t-DSMI) showing strong fluorescence emission has been evaluated as a fluorescent probe. The results of a preliminary systematic study on the detection of a series of inorganic anions have revealed that this Q[n]-based host–guest fluorescent probe shows clear responses to BF4− and H2PO4− anions through distinct fluorescence quenching. Application of this Q[n]-based host–guest interaction system in anion recognition or detection opens a new avenue in Q[n] chemistry.

scholarly journals Sensing mechanism of a new fluorescent probe for hydrogen sulfide: photoinduced electron transfer and invalidity of excited-state intramolecular proton transfer

RSC Advances ◽  
2021 ◽  
Vol 11 (36) ◽  
pp. 22214-22220
Author(s):  
Xiumin Liu ◽  
Yutai Qi ◽  
Shenhan Pu ◽  
Yi Wang ◽  
Ziqing Gao
Keyword(s):  
Electron Transfer ◽  
Hydrogen Sulfide ◽  
Excited State ◽  
Fluorescence Quenching ◽  
Photoinduced Electron Transfer ◽  
Stokes Shift ◽  
Fluorescence Emission ◽  
Intramolecular Proton Transfer ◽  
Strong Fluorescence ◽  
Theoretical Results

Our theoretical results show that the fluorescence quenching of DFAN is caused by PET mechanism and the large Stokes shift fluorescence emission of DFAH is not due to the ESIPT mechanism. Due to the absence of PET process, enol structure emits strong fluorescence, which is inconsistent with the fluorescence mechanism in the experiment.

A rhodamine-based Hg2+-selective fluorescent probe in aqueous solution

2009 ◽  
Vol 63 (3) ◽  
Author(s):  
Minglei Zhao ◽  
Xiao-Feng Yang ◽  
Shenfeng He ◽  
Liping Wang
Keyword(s):  
Aqueous Solution ◽  
Detection Limit ◽  
Transition Metal ◽  
Fluorescent Probe ◽  
Fluorescence Emission ◽  
Transition Metal Ions ◽  
Fluorescent Product ◽  
Compound I ◽  
Strong Fluorescence ◽  
Fluorogenic Probe

AbstractA new rhodamine-based Hg2+-selective fluorescent probe (I) was designed and synthesized. Compound I displays excellent selective and sensitive response to Hg2+ over other transition metal ions in neutral aqueous solutions. I itself is a colorless, nonfluorescent compound. Upon addition of Hg2+ to its solution, the thiosemicarbazide moiety of I undergoes an irreversible desulfurization reaction to form the corresponding 1,3,4-oxadiazole (II), a colorful and fluorescent product, causing instantaneous development of visible color and strong fluorescence emission. Based on this mechanism, a fluorogenic probe for Hg2+ was developed. The fluorescence increases linearly with the Hg2+ concentration up to 0.8 μmol L−1 with the detection limit of 9.4 nmol L− (3σ).

A Boronic Acid-Based Fluorescence Hydrogel for Monosaccharide Detection

2018 ◽  
Author(s):  
Suying Xu ◽  
Adam Sedgwick ◽  
Souad Elfecky ◽  
Wenbo Chen ◽  
Ashley Jones ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Boronic Acid ◽  
Binding Constants ◽  
Strong Fluorescence ◽  
Fluorescence Response ◽  
Turn On ◽  
Fluorescence Turn On ◽  
Hydrogel System

<p>A boronic acid-based anthracene fluorescent probe was functionalised with an acrylamide unit to incorporate into a hydrogel system for monosaccharide detection<i>. </i>In solution, the fluorescent probe<b> </b>displayed a strong fluorescence turn-on response upon exposure to fructose, and an expected trend in apparent binding constants, as judged by a fluorescence response where D-fructose > D-galactose > D-mannose > D-glucose. The hydrogel incorporating the boronic acid monomer demonstrated the ability to detect monosaccharides by fluorescence with the same overall trend as the monomer in solution with the addition of fructose resulting in a 10-fold enhancement (≤ 0.25 M). <b><u></u></b></p>

An “on–off” fluorescent probe based on cucurbit[7]uril for highly sensitive determination of ammonia nitrogen in aquaculture water

2021 ◽  
Author(s):  
Zhen Li ◽  
Tan Wang ◽  
Xianbao Xu ◽  
Cong Wang ◽  
Daoliang Li
Keyword(s):  
Fluorescence Quenching ◽  
Inclusion Complex ◽  
Fluorescent Probe ◽  
Ammonia Nitrogen ◽  
Highly Sensitive ◽  
Sensitive Determination ◽  
Aquaculture Water

A novel “on–off” fluorescent probe for the determination of ammonia nitrogen has been synthesized. URO can replace PAL into the cavity of CB[7] to form a stable inclusion complex, eventually forming the fluorescence quenching system of URO@CB[7].

Measurement of tissue oxygen with a fluorescent probe

1976 ◽  
Vol 41 (4) ◽  
pp. 598-602 ◽  
Author(s):  
I. S. Longmuir ◽  
J. A. Knopp
Keyword(s):  
Oxygen Consumption ◽  
Fluorescence Quenching ◽  
Fluorescent Probe ◽  
Spatial Resolution ◽  
Tissue Oxygen ◽  
Quenching Of Fluorescence ◽  
Oxygen Gradients ◽  
Geometrical Factors

Evidence is presented that pyrenebutyric acid is nontoxic at the concentrations required for the measurement of fluorescence quenching by physiological concentrations of oxygen. It appears that this molecule can be used tomeasure tissue oxygen since it does not interfere with oxygen consumption. Equally, tissue components do not interfere with the quenching of fluorescence to such an extent as to invalidate the method. The spatial resolution of the technique is limited by some tissue geometrical factors which do not,however, appear to be great enough to prevent its use to measure intercapillary oxygen gradients.

scholarly journals A real-time ratiometric fluorescent probe for imaging of SO2 derivatives in mitochondria of living cells

RSC Advances ◽  
2019 ◽  
Vol 9 (39) ◽  
pp. 22348-22354 ◽  
Author(s):  
Junwei Shi ◽  
Wei Shu ◽  
Yong Tian ◽  
Yulong Wu ◽  
Jing Jing ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Real Time ◽  
Fluorescent Probe ◽  
Intramolecular Charge Transfer ◽  
Living Cells ◽  
Selective Detection ◽  
Hemicyanine Dye ◽  
Ratiometric Fluorescent Probe

A real-time ratiometric fluorescent probe (IN-CZ) for highly selective detection of sulfite was designed and synthesized, which is based on modulating the intramolecular charge transfer of the hemicyanine dye platform.

scholarly journals A highly selective fluorescent probe for the sensing of Cu2+ based on the hydrolysis of a quinoline-2-carboxylate and its application in cell imaging

2020 ◽  
pp. 174751982097392
Author(s):  
Qihua You ◽  
Yihua Zhuo ◽  
Yadong Feng ◽  
Yujuan Xiao ◽  
Yanyu Zhang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Cell Imaging ◽  
High Selectivity ◽  
Living Cells ◽  
World Health ◽  
Strong Fluorescence ◽  
The World ◽  
Phenolic Group ◽  
Health Organization ◽  
Hydrolysis Of

A highly selective OFF–ON fluorescent probe is developed for the sensing of Cu2+ based on the hydrolysis of a quinoline-2-carboxylate moiety. The probe is weakly fluorescent due to esterification of the phenolic group. Upon treatment with 1 equiv. of Cu2+, the probe exhibits strong fluorescence at 570 nm. The probe also exhibits high selectivity for Cu2+ over other cations with a low detection limit of 0.2 μM, which is sensitive enough to meet the standard of the World Health Organization for Cu2+ in drinking water (30 μM). Moreover, the probe shows a very low cell cytotoxicity, and imaging experiments demonstrate that the probe can be used for the sensing of Cu2+ in living cells.

A Highly Selective Fluorescent Probe for Zn2+ Based on a Rhodamine-6G dye Derivative Modified by a Furan Unit

2018 ◽  
Vol 42 (4) ◽  
pp. 194-197 ◽  
Author(s):  
Rui Qiao ◽  
Wen-Zhang Xiong ◽  
Cui-Bing Bai ◽  
Lin Zhang ◽  
Meng-Meng Zhu ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Saline Solution ◽  
Rhodamine 6G ◽  
Fluorescence Emission ◽  
Colour Change ◽  
High Sensitivity ◽  
Specific Selectivity ◽  
Naked Eye Detection ◽  
Rhodamine 6G Dye ◽  
Rapid Emergence

A fluorescent probe for Zn2+ based on rhodamine-6G has been synthesised. It showed excellent fluorescent specific selectivity and high sensitivity for Zn2+ compared with other metal ions, such as Fe3+, Cr3+, Hg2+, Ag+, Ca2+, Cu2+, Pb2+, Cd2+, Ni2+, Co2+ and Mg2+, in CH3CN–phosphate buffer saline solution. The distinct colour change and the rapid emergence of fluorescence emission provided ‘naked-eye’ detection of Zn2+. The detection limit of the fluorescent probe towards Zn2+ was 1.78 μM. In addition, the fluorescence lifetime and fluorescence quantum yield were measured.

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