scholarly journals π-Extended Tetraphenylethylene Containing a Dicyanovinyl Group as an Ideal Fluorescence Turn-On and Naked-Eye Color Change Probe for Hydrazine Detection

ACS Omega ◽  
2020 ◽  
Vol 5 (43) ◽  
pp. 28369-28374
Author(s):  
Min Joo Jung ◽  
Su Jung Kim ◽  
Min Hee Lee
Keyword(s):  
Color Change ◽  
Eye Color ◽  
Naked Eye ◽  
Turn On ◽  
Fluorescence Turn On

Rhodamine–benzothiazole conjugate as an efficient multimodal sensor for Hg2+ ions and its application to imaging in living cells

2018 ◽  
Vol 42 (14) ◽  
pp. 11665-11672 ◽  
Author(s):  
Perumal Sakthivel ◽  
Karuppannan Sekar ◽  
Gandhi Sivaraman ◽  
Subramanian Singaravadivel
Keyword(s):  
Rhodamine B ◽  
Color Change ◽  
Living Cells ◽  
Fluorescence Response ◽  
Eye Color ◽  
Naked Eye ◽  
Turn On ◽  
Rhodamine B Dye

A rhodamine B dye bearing a benzothiazole conjugate is designed and synthesized, it shows a highly selective and sensitive naked-eye color change and turn-on fluorescence response to Hg2+ ions.

A new phenothiazine-based fluorescent probe for detection of hydrazine with naked-eye color change properties

2021 ◽  
Author(s):  
Nian Rao ◽  
Yi Le ◽  
Dan Li ◽  
Yan Zhang ◽  
Qin Wang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Color Change ◽  
Eye Color ◽  
Naked Eye

Real-time naked-eye multiplex detection of toxins and bacteria using AIEgens with the assistance of graphene oxide

2017 ◽  
Vol 196 ◽  
pp. 363-375 ◽  
Author(s):  
Ruoyu Zhang ◽  
Xiaolei Cai ◽  
Guangxue Feng ◽  
Bin Liu
Keyword(s):  
Graphene Oxide ◽  
Real Time ◽  
Human Life ◽  
Fluorescent Light ◽  
Multiplex Detection ◽  
Detection Model ◽  
Naked Eye ◽  
Turn On ◽  
Fluorescence Turn On ◽  
Naked Eye Detection

Toxins and bacteria in water or food pose a threat to human life and could potentially be exploited for bioterrorism. Real-time naked-eye detection of these contaminants is highly desirable to provide a direct and simple analytical method and address the challenges of the existing strategies. Using the detection of ricin and B. subtilis as an example, a naked-eye multiplex detection model is established. In this work, a green fluorogen with aggregation-induced emission (AIE) characteristics was encapsulated in silica nanoshells. The resulting green AIE nanoparticles (NPs) were further functionalized with ricin binding aptamers (RBA), which were used together with graphene oxide (GO) to provide a fluorescence turn-on approach recognizable by naked eye for the specific sensing of ricin. The platform is compatible with a red emissive fluorescent light-up probe (AIE-2Van) for B. subtilis detection. The success of the multiplex is validated by different colours, that is, green for ricin and red for B. subtilis, which are clearly recognizable by naked eye in the same solution.

scholarly journals Detection of organic amines using a ratiometric chromophoric fluorescent probe with a significant emission shift

2020 ◽  
Vol 44 (7-8) ◽  
pp. 475-481
Author(s):  
Dan Wu ◽  
Yi Liu ◽  
Fei Zheng ◽  
Shi-Qi Rong ◽  
Tao Yang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Nucleophilic Addition ◽  
High Selectivity ◽  
Color Change ◽  
Intramolecular Charge Transfer ◽  
Signaling Mechanism ◽  
Eye Color ◽  
Naked Eye ◽  
Spectrometric Measurements ◽  
Organic Amines

Taking advantages of both the well-known α,β-unsaturated structure and the special nucleophilicity of organic amines toward its acceptor moieties, intramolecular charge transfer as a signaling mechanism is used to design and synthesize a new ratiometric chromophoric fluorescent probe (BI-CA-ID) with large emission shifts toward organic amines. This probe is employed for the detection of organic amines with high selectivity and sensitivity and a “naked-eye” color change (from red to colorless). Ultraviolet–visible and fluorescence spectrometric measurements are used to determine detection limits as low as 0.024 and 0.43 μM. Furthermore, nucleophilic addition of the amine on the α,β-unsaturated of BI-CA-ID indicated that the sensing mechanism occurs via interruption of the π-conjugation.

scholarly journals A new rhodamine fluorescent OFF-ON-OFF probe for selective sensing of Fe3+ and AcO- in aqueous media and living cells

2018 ◽  
Vol 238 ◽  
pp. 04002
Author(s):  
Qinglei Liu ◽  
Huimin Liu ◽  
Yanan Lei ◽  
Yan Gao ◽  
Bing Zhao
Keyword(s):  
Fluorescence Probe ◽  
Color Change ◽  
Aqueous Media ◽  
Living Cells ◽  
Eye Color ◽  
Naked Eye ◽  
Fluorescent Response ◽  
Good Biocompatibility ◽  
Anions And Cations ◽  
Displacement Approach

A new fluorescent chemosensor for Fe3+ was developed based on a rhodamine platform. L displayed highly selective and sensitive “OFF-ON” fluorescence response and naked-eye color change to Fe3+ in aqueous solution. The resulting L-Fe3+ complex was found to act as a selective“ ON-OFF” fluorescence probe for AcO- against common anions and cations with a Fe3+ displacement approach. The detection limits of L to Fe3+ and L-Fe3+ complex to AcO- were estimated to be 6.04×10-8 mol/L and 7.51×10-8 mol/L, respectively. The good biocompatibility of L enabled the investigation of fluorescent response for Fe3+ and AcO- in living Ana-1 cells by confocal microscope.

A fluorescent probe for the specific detection of cysteine in human serum samples

2019 ◽  
Vol 11 (26) ◽  
pp. 3280-3285 ◽  
Author(s):  
Zhen Huang ◽  
Cuiyan Wu ◽  
Yaqian Li ◽  
Zile Zhou ◽  
Ruihua Xie ◽  
...  
Keyword(s):  
Human Serum ◽  
Fluorescent Probe ◽  
High Selectivity ◽  
Color Change ◽  
Eye Detection ◽  
Specific Detection ◽  
Serum Samples ◽  
Naked Eye ◽  
Turn On ◽  
Naked Eye Detection

A turn-on fluorescent probe for cysteine with high selectivity was designed and synthetized. The probe can be used for “naked-eye” detection of Cys with an obvious color change from yellow to colorless. The probe could be applied for Cys detection in real human serum.

A Naked-Eye Visible and Fluorescence "Turn-On" Probe for Acetylcholinesterase Assay and the Discrimination of Biothiols

2018 ◽  
Vol 85 (3) ◽  
pp. 437-444 ◽  
Author(s):  
Lingzhi Zhao ◽  
Liu Zhao ◽  
Chenxiao Zhang ◽  
Yanqi Li
Keyword(s):  
Naked Eye ◽  
Turn On ◽  
Fluorescence Turn On

Colorimetric Anion Sensing and Color Imaging Based on Catalyzed Deprotection in a New Azonaphthol Chromophore

2006 ◽  
Vol 6 (11) ◽  
pp. 3551-3554
Author(s):  
Moon Soo Choi ◽  
Il Hoon Cho ◽  
Won Seok Lyoo ◽  
Taek Seung Lee
Keyword(s):  
Absorption Spectrum ◽  
Color Change ◽  
Hydroxyl Group ◽  
Color Imaging ◽  
Anion Sensing ◽  
Eye Color ◽  
Naked Eye

We synthesized an ortho-phenylazonaphthol compound of which hydroxyl group was protected by a thermo-labile tert-butoxycarbonyl (t-Boc) group, in which hydroxyazo- and hydrazone-tautomerism could be blocked. The chromophore obtained by protection with t-Boc group was exclusively present as a hydroxyazo tautomer and exhibited blue-shifted absorption spectrum compared to their parent azohydrazone tautomerizing chromophore. With this compound, we performed colorimetric anion sensing based on the deprotection-induced possible azohydrazone formation in dye chromophore subsequently resulting in naked-eye color change. Besides, the t-Boc protected chromophore could be used as a color imaging material via thermolysis of thermo-labile t-Boc groups resulting in formation of azohydrazone form with red shifted absorption.

Moisture-Responsive Behavior in the Azophenolic Ionic Liquid Solution Accompanied by a Naked-Eye Color Change

2019 ◽  
Vol 35 (6) ◽  
pp. 624-629 ◽  
Author(s):  
Mingguang PAN ◽  
◽  
Yongsheng ZHAO ◽  
Xiaoqin ZENG ◽  
Jianxin ZOU ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Color Change ◽  
Liquid Solution ◽  
Eye Color ◽  
Naked Eye ◽  
Responsive Behavior ◽  
Ionic Liquid Solution
Sign in / Sign up

Export Citation Format

Share Document