scholarly journals Synthesis of 2-(1-Benzofuran-2-yl)-4-(1,3-benzoxazol-2-yl/ 1,3-benzothiazol-2-yl) Quinolines as Blue Green Fluorescent Probes

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Yadav D. Bodke ◽  
Sheelavanth Shankerrao ◽  
Hosanagara N. Harishkumar
Keyword(s):  
Quantum Yield ◽  
Fluorescent Probes ◽  
Polyphosphoric Acid ◽  
Bathochromic Shift ◽  
Stokes Shift ◽  
Green Light ◽  
High Quantum Yield ◽  
Fluorescent Properties ◽  
One Step ◽  
Green Fluorescent

A series of novel 2-(1-benzofuran-2-yl)-4-(1,3 benzoxazol-2-yl/1,3-benzothiazol-2-yl) quinoline derivatives4(a–d)were synthesized in one step by the reaction of 2-(1-benzofuran-2-yl) quinoline-4-carboxylic acids3(a-b)with o-aminophenol and o-amino thiophenol, respectively, using polyphosphoric acid (PPA) as a cyclizing agent. The fluorescent properties of newly synthesized compounds were investigated in three different organic solvents like chloroform (CHCl3), tetrahydrofuran (THF), and dimethyl sulfoxide (DMSO). The photophysical constants such as quantum yield and stokes shift were determined. From the results of fluorescence study, it is evident that all synthesized compounds are fluorescent in solution. Compound4aemitted green light (490.4 nm, 518.2 nm, and 522.4 nm) with high quantum yield in all the three solvents, while compounds4b, 4c, and4demitted green light (512 nm, 499 nm, 510 nm) only in polar solvent DMSO. All fluorescent probes exhibited a bathochromic shift on increase in polarity of the solvent.

One-Step Preparation of Green Fluorescent Graphene Quantum Dots from Petroleum Asphalt

2017 ◽  
Vol 45 ◽  
pp. 76-83 ◽  
Author(s):  
Pin Hui Zhao ◽  
Yi Luo ◽  
Ling Yun Kong
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Green Light ◽  
Average Diameter ◽  
Chemical Oxidation ◽  
Fluorescent Properties ◽  
Petroleum Asphalt ◽  
One Step ◽  
Bright Green ◽  
Green Fluorescent

Inherently benefiting from the natural nanosize graphene-structure in raw asphalt material. Asphalt-derived graphene quantum dots ( GQDs ) are prepared through, a facile route, one-step chemical oxidation of cheap petroleum asphalt. The as-prepared GQD sample may be well dissolved in water with a good homogeneous size at an average diameter of 2.44 nm, luminescing bright green light by excitation of 365 nm with a high quantum yield up to 16.13%. Furthermore, they are much smaller and thinner than most of the reported GQDs, presenting excellent fluorescent properties, such as excitation-tuned photoluminescence and good resistance to photobleaching. They are much smaller and thinner than most of the reported GQDs

Multicolor tunable highly luminescent carbon dots for remote force measurement and white light emitting diodes

2019 ◽  
Vol 55 (81) ◽  
pp. 12164-12167 ◽  
Author(s):  
Ya Liu ◽  
Miaoran Zhang ◽  
Yanfen Wu ◽  
Rui Zhang ◽  
Yi Cao ◽  
...  
Keyword(s):  
Quantum Yield ◽  
White Light ◽  
Carbon Dots ◽  
Light Emitting Diodes ◽  
Solvothermal Method ◽  
Force Measurement ◽  
High Quantum Yield ◽  
Light Emitting ◽  
One Step ◽  
White Light Emitting Diodes

A one-step solvothermal method was exploited to synthesize blue, yellow and red carbon dots with high quantum yield by altering the corresponding reaction solvent.

A NIR fluorescent sensor for biothiols based on a dicyanoisophorone derivative with a large Stokes shift and high quantum yield

2019 ◽  
Vol 43 (24) ◽  
pp. 9614-9622
Author(s):  
Ming Qian ◽  
Liuwei Zhang ◽  
Jingyun Wang
Keyword(s):  
Quantum Yield ◽  
Fluorescent Sensor ◽  
Stokes Shift ◽  
High Sensitivity ◽  
Living Cells ◽  
Rapid Response ◽  
High Quantum Yield ◽  
Large Stokes Shift ◽  
High Quantum ◽  
Nir Fluorescence

Probe N-Bio exhibited rapid response, high sensitivity and strong NIR fluorescence in the detection of biothiols in living cells.

A novel fluorescent probe for selective imaging of cellular cysteine with large Stokes shift and high quantum yield

Talanta ◽  
2020 ◽  
Vol 210 ◽  
pp. 120612 ◽  
Author(s):  
Yabing Gan ◽  
Guoxing Yin ◽  
Ting Yu ◽  
Youyu Zhang ◽  
Haitao Li ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescent Probe ◽  
Stokes Shift ◽  
High Quantum Yield ◽  
Large Stokes Shift ◽  
High Quantum

Continuous wave pumped single-mode nanolasers in inorganic perovskites with robust stability and high quantum yield

Nanoscale ◽  
2018 ◽  
Vol 10 (28) ◽  
pp. 13565-13571 ◽  
Author(s):  
Li Jiang ◽  
Renming Liu ◽  
Rongling Su ◽  
Ying Yu ◽  
Haofei Xu ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Robust Stability ◽  
Room Temperature ◽  
Continuous Wave ◽  
Single Mode ◽  
Narrow Linewidth ◽  
High Quantum Yield ◽  
Inorganic Perovskite ◽  
High Quantum ◽  
One Step

A one-step and surfactant-free method is proposed to synthesize inorganic perovskite (CsPbX3, X = Cl, Br, I) nanowires at room temperature. The as-prepared CsPbX3 nanowires exhibit high lasing quantum yield, single-mode lasing with ultra-narrow linewidth.

High solid-state luminescence in propeller-shaped AIE-active pyridine–ketoiminate–boron complexes

2015 ◽  
Vol 13 (20) ◽  
pp. 5775-5782 ◽  
Author(s):  
Yanping Wu ◽  
Zhenyu Li ◽  
Qingsong Liu ◽  
Xiaoqing Wang ◽  
Hui Yan ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Solid State ◽  
Quantum Yield ◽  
Stokes Shift ◽  
Electronic Structure Calculations ◽  
High Quantum Yield ◽  
X Ray ◽  
Boron Complexes ◽  
Structure Calculations ◽  
State Luminescence

Two pyridine-ketoiminate-based organoboron complexes were demonstrated to possess aggregation-induced emission, large Stokes shift and high quantum yield in the solid-state, which were rationalized through X-ray crystal analysis and electronic structure calculations.

Fluoroimmunoassays and immunofluorometric assays.

1985 ◽  
Vol 31 (3) ◽  
pp. 359-370 ◽  
Author(s):  
I Hemmilä
Keyword(s):  
Fluorescent Probes ◽  
Clinical Immunology ◽  
Solid Phase ◽  
Stokes Shift ◽  
Fluorescent Properties ◽  
Time Resolved ◽  
Long Wavelength ◽  
Porphyrin Derivatives ◽  
Wavelength Emission ◽  
Homogeneous Assays

Abstract Fluorescent probes and fluorometric methods have gained increasing interest in the field of clinical immunology, not only as one additional alternative to radioimmunoassays, but also in producing cheap, stable, and safe reagents and rapid and sensitive assays. One of the main goals has been the development of homogeneous assays: assays based on fluorescence polarization, fluorescence quenching, excitation transfer, or enzymically releasable probes are widely applied, especially in drug monitoring. The development of suitable solid-phase separation techniques has facilitated utilization of fluorescence in heterogeneous assays, which in general have wider applications, from proteins and viruses to small haptens. Lately new alternative fluorescent probes and methods have been introduced. For example, the use of fluorescent phycobiliproteins or porphyrin derivatives with long-wavelength emission and large Stokes shift or, in particular, the rare earth chelates with unique fluorescent properties well suited to time-resolved measurement have opened new possibilities towards more sensitive immunoassays.

High quantum yield blue- and orange-emitting carbon dots: one-step microwave synthesis and applications as fluorescent films and in fingerprint and cellular imaging

The Analyst ◽  
2019 ◽  
Vol 144 (15) ◽  
pp. 4569-4574 ◽  
Author(s):  
Zhiqin Deng ◽  
Chang Liu ◽  
Yanzi Jin ◽  
Jianlin Pu ◽  
Bin Wang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Microwave Synthesis ◽  
Carbon Dots ◽  
Cellular Imaging ◽  
High Quantum Yield ◽  
Nitrogen Doped ◽  
High Quantum ◽  
One Step

Nitrogen-doped CDs with high quantum yield have been synthesized by one-step microwave synthesis and successfully used for films and bioimaging.

One-step ultrasonic synthesis of graphene quantum dots with high quantum yield and their application in sensing alkaline phosphatase

2015 ◽  
Vol 51 (5) ◽  
pp. 948-951 ◽  
Author(s):  
Yanhong Zhu ◽  
Guangfeng Wang ◽  
Hong Jiang ◽  
Ling Chen ◽  
Xiaojun Zhang
Keyword(s):  
Quantum Dots ◽  
Alkaline Phosphatase ◽  
Graphene Oxide ◽  
Quantum Yield ◽  
Graphene Quantum Dots ◽  
Label Free ◽  
High Quantum Yield ◽  
Ultrasonic Synthesis ◽  
High Quantum ◽  
One Step

With only graphene oxide and KMnO4, the luminescent graphene quantum dots (GQDs) in high quantum yield were prepared by one-step synthesis using ultrasonication, and applied in the label-free, simple and fast fluorescence assay of alkaline phosphatase (ALP).

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