Aggregation Induced Enhanced Emission (AIEE) Based Colorimetric and Selective Turn-on Fluorescent Sensor for Cyanide

2021 ◽  
Author(s):  
Sudha Lakshminarayanan ◽  
Kumaresan.M Murugesan ◽  
Vanthana Jeyasingh ◽  
Narayanan Selvapalam ◽  
Geetha Dass
Keyword(s):  
Fluorescent Sensor ◽  
Fluorescence Emission ◽  
Spectroscopic Studies ◽  
Cyanide Ion ◽  
H Nmr ◽  
Turn On ◽  
Host Guest Complex ◽  
Preferential Binding ◽  
New Type ◽  
Acetonitrile Medium

Abstract We have prepared and reporting a new cyanide colorimetric and turn-on fluorescent chemo sensor L. Naked-eye colorimetric studies shows the prepared receptor is selectively sensing cyanide ion in acetonitrile medium. The sensor L shows very weak fluorescence in acetonitrile medium. The emission intensity of L gets reduced (quenching of fluorescence) upon addition of one equivalent of cyanide. Meanwhile further gradual addition of more than one equivalents of cyanide onto 1:1 cyanide complex of L shows remarkable fluorescence enhancement. The weakly emissive receptor L show drastic enhancement in fluorescence intensity upon addition of excessive cyanide ion which is mainly attributed due to the restriction of intramolecular rotation of 1:1 L•CN- complex and intermolecular aggregation of host: guest complex. This enhanced fluorescence emission is attributed due to the aggregation induced enhanced emission (AIEE) is subsequently supported with UV-Vis, emission and 1H-NMR spectroscopic studies. The preferential binding of cyanide by electron deficient receptor L through hydrogen bonding and anion···π interaction over benzene analogue of L is also analyzed with help of MEP surface analyses. To the best of our knowledge, this is the first example for selective colorimetric and turn- on cyanide sensor through AIEE mechanism. This type of fluorine rich organic material having such an aggregation enhanced emission properties in response to cyanide addition will be useful to construct the new type of material for various sensory applications.

A New Schiff’s Base Fluorescent Sensor for the Selective Detection of Mercury Ion

2011 ◽  
Vol 239-242 ◽  
pp. 1105-1108 ◽  
Author(s):  
Xue Mei Wang ◽  
Hua Yan ◽  
Yong Chen ◽  
He Bin Bao
Keyword(s):  
Fluorescent Sensor ◽  
Fluorescence Emission ◽  
Emission Spectra ◽  
Mercury Ion ◽  
Fluorescence Measurement ◽  
Fluorescence Emission Spectra ◽  
H Nmr ◽  
Complex Process ◽  
Characteristic Wavelength ◽  
Ft Ir

A new Hg2+-sensing and selective fluorescent sensor, 1-(1-pyrenecarboxaldehyd e)-thiocarbohydrazone, was synthesized and characterized by elemental analysis, FT-IR and 1H NMR spectra. Its fluorescence and recognition properties to the mercury ion were studied by the fluorescence emission spectra. With adding mercury ion into solution, the fluorescence emission intensities at different characteristic wavelength changed continually. Hence the ratiometric fluorescence measurement was used for detecting the complex process. It was found that a 1:1 stoichiometry complex is formed between the mercury ion and the compound with the association constants were 2.04×105 L/mol, respectively. And the detection limits of the mercury ion were 2.52×10-8 mol/L.

Turn-on fluorescent sensor for the detection of cyanide based on a novel dicyanovinyl phenylacetylene

2017 ◽  
Vol 41 (10) ◽  
pp. 4058-4064 ◽  
Author(s):  
Eknarin Thanayupong ◽  
Khomson Suttisintong ◽  
Mongkol Sukwattanasinitt ◽  
Nakorn Niamnont
Keyword(s):  
Fluorescent Sensor ◽  
Knoevenagel Reaction ◽  
Sonogashira Coupling ◽  
Ion Detection ◽  
Cyanide Ion ◽  
Turn On

A novel phenylacetylene derivative (3) was successfully synthesized via Sonogashira coupling and a Knoevenagel reaction for cyanide ion detection.

scholarly journals Novel turn-on fluorescent sensor for cyanide ion based on the charge transfer transition of phenothiazine/indolium compounds

2021 ◽  
Author(s):  
Yasuhiro Morikawa ◽  
Miku Hirabara ◽  
Keiji Nishiwaki ◽  
Shigeo Suzuki ◽  
Isao Nakanishi
Keyword(s):  
Charge Transfer ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Fluorescent Sensor ◽  
Stokes Shift ◽  
Charge Transfer Transition ◽  
Cyanide Ion ◽  
Large Stokes Shift ◽  
Turn On

A new fluorescent sensor combining phenothiazine and indolium, which reacts specifically with the cyanide ion with a large Stokes shift and a good fluorescence quantum yield, was prepared. When CN-.

New type of addition to 5-substituted 4-arylidene-2-(4,5-dihydrofurfurylidene)-N,N-dimethyliminium bisperchlorates. Preparation of 4-substituted 5-(N,N-dimethylamino)-2-furancarbaldehydes

1986 ◽  
Vol 51 (3) ◽  
pp. 573-580 ◽  
Author(s):  
Tibor Gracza ◽  
Zdeněk Arnold ◽  
Jaroslav Kováč
Keyword(s):  
Nmr Spectra ◽  
Addition Reaction ◽  
H Nmr ◽  
Organic Bases ◽  
New Type

4-Arilidene-5-(N,N-dimethyliminium)-2-(4,5-dihydrofurfurylidene)-N,N-dimethyliminium bisperchlorate I undergoes a 1,4-addition reaction with organic bases under re-formation of the furan nucleus; this behaviour has been utilized in the preparation of new 4-substituted 5-(N,N-dimethylamino)-2-furancarbaldehydes II, III. The structure of the prepared compounds has been confirmed by 13C and 1H NMR spectra.

scholarly journals A single point mutation converts a proton-pumping rhodopsin into a red-shifted, turn-on fluorescent sensor for chloride

2021 ◽  
Author(s):  
Jasmine N. Tutol ◽  
Jessica Lee ◽  
Hsichuan Chi ◽  
Farah N. Faizuddin ◽  
Sameera S. Abeyrathna ◽  
...  
Keyword(s):  
Point Mutation ◽  
Fluorescent Sensor ◽  
Single Point ◽  
Proton Pumping ◽  
Single Point Mutation ◽  
Turn On ◽  
Gloeobacter Violaceus

By utilizing laboratory-guided evolution, we have converted the fluorescent proton-pumping rhodopsin GR from Gloeobacter violaceus into GR1, a red-shifted, turn-on fluorescent sensor for chloride.

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