Carbon dots with high fluorescence quantum yield: the fluorescence originates from organic fluorophores

Nanoscale ◽  
2016 ◽  
Vol 8 (30) ◽  
pp. 14374-14378 ◽  
Author(s):  
Lei Shi ◽  
Jian Hai Yang ◽  
Hai Bo Zeng ◽  
Yong Mei Chen ◽  
Sheng Chun Yang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Carbon Dots ◽  
Fluorescence Quantum Yield ◽  
Organic Fluorophores ◽  
High Fluorescence ◽  
High Fluorescence Quantum Yield

Preparation of highly photoluminescent sulfur-doped carbon dots for Fe(iii) detection

2015 ◽  
Vol 3 (2) ◽  
pp. 542-546 ◽  
Author(s):  
Quan Xu ◽  
Peng Pu ◽  
Jungang Zhao ◽  
Chenbo Dong ◽  
Chun Gao ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Hydrothermal Method ◽  
Carbon Dots ◽  
Fluorescence Quantum Yield ◽  
One Step ◽  
Emission Behavior ◽  
High Fluorescence ◽  
Doped Carbon Dots ◽  
High Fluorescence Quantum Yield

Sulfur-doped carbon dots were synthesized by a one-step hydrothermal method and exhibited high fluorescence quantum yield (67%) and exceptional emission behavior.

scholarly journals Preparation of Carbon Dots with High-Fluorescence Quantum Yield and Their Application in Dopamine Fluorescence Probe and Cellular Imaging

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Haitao Lin ◽  
Jun Huang ◽  
Liyun Ding
Keyword(s):  
Quantum Yield ◽  
Carbon Dots ◽  
Fluorescence Quantum Yield ◽  
Fluorescence Probe ◽  
Uv Light ◽  
Umbilical Vein ◽  
Photoelectron Spectra ◽  
X Ray ◽  
High Fluorescence ◽  
High Fluorescence Quantum Yield

Carbon dots represent a kind of fluorescent nanomaterial and have broad application prospects in the field of biosensing and optoelectronics. Here, we explored carbon dots with a high-fluorescence quantum yield rate synthesized from L-cysteine and citric acid by the microwave-assisted method. The characteristics of the carbon dots were studied using a transmission electron microscope, an X-ray diffractometer, X-ray photoelectron spectra, a UV-Vis absorption spectrometer, a FTIR spectrometer, and a fluorescence spectrophotometer. The obtained carbon dots exhibited a high-fluorescence quantum yield (up to 85%), which is due to the combination of amidogens and sulfydryl with carbon dots, and hence bring the improved fluorescence property. We used carbon dots for in vitro imaging of CRL-5822 cells and human umbilical vein endothelial cells, which showed the low inhibitory rate (0.8%) of cells for 48 h with good biocompatibility demonstrated by the cell viability assay. The image of cells can be observed clearly under UV light. The Stern-Volmer equation was introduced to describe the quenching effect between the fluorescence intensity of carbon dots and the concentration of aqueous dopamine (DA).

Facile preparation of solid-state fluorescent carbon dots with high fluorescence quantum yield and application in rapid latent fingerprints detection

2021 ◽  
Author(s):  
Hai-Jiao Wang ◽  
Wan-Yi Hou ◽  
Jing Kang ◽  
Xin-Yu Zhai ◽  
Hongli Chen ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Latent Fingerprints ◽  
Energy Resonance ◽  
Facile Preparation ◽  
High Fluorescence ◽  
Fluorescent Carbon Dots ◽  
High Fluorescence Quantum Yield ◽  
Resonance Transfer

Due to the direct π - π interaction and excessive energy resonance transfer, it is very challenging to prepare CDs with high fluorescence quantum yield (QY) in solid state. In...

scholarly journals Unusually large fluorescence quantum yield for a near-infrared emitting DNA-stabilized silver nanocluster

2020 ◽  
Vol 56 (47) ◽  
pp. 6384-6387
Author(s):  
Vlad A. Neacşu ◽  
Cecilia Cerretani ◽  
Mikkel B. Liisberg ◽  
Steven M. Swasey ◽  
Elisabeth G. Gwinn ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Near Infrared ◽  
Infrared Region ◽  
Silver Nanoclusters ◽  
Silver Nanocluster ◽  
Dna Strands ◽  
Near Infrared Region ◽  
High Fluorescence ◽  
High Fluorescence Quantum Yield

Silver nanoclusters stabilized by 5′-CCCGGAGAAG-3′ DNA strands display an unusually high fluorescence quantum yield in the near-infrared region.

scholarly journals Achieving remarkable and reversible mechanochromism from a bright ionic AIEgen with high specificity for mitochondrial imaging and secondary aggregation emission enhancement for long-term tracking of tumors

2020 ◽  
Vol 4 (3) ◽  
pp. 941-949 ◽  
Author(s):  
Xinzhe Yang ◽  
Qian Wang ◽  
Peiyu Hu ◽  
Chao Xu ◽  
Wenjing Guo ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Cancer Cells ◽  
Fluorescence Quantum Yield ◽  
High Specificity ◽  
Emission Enhancement ◽  
High Fluorescence ◽  
High Fluorescence Quantum Yield

An ionic AIEgen with high fluorescence quantum yield shows remarkable and reversible mechanochromism as well as excellent mitochondrial imaging of cancer cells and long-term tracking of tumors.

Forcing dimethylacridine crooking to improve the efficiency of orange-red thermally activated delayed fluorescent emitters

2020 ◽  
Vol 8 (30) ◽  
pp. 10416-10421
Author(s):  
Feng-Yan Hao ◽  
Yi-Zhong Shi ◽  
Kai Wang ◽  
Xiao-Chun Fan ◽  
Lin Wu ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Steric Hindrance ◽  
Fluorescence Quantum Yield ◽  
Energy Splitting ◽  
Triplet Energy ◽  
Thermally Activated ◽  
High Fluorescence ◽  
Planar Geometries ◽  
High Fluorescence Quantum Yield

By crooking conventional donor segments via suitable steric hindrance, nearly planar geometries, a small singlet–triplet energy splitting and a high fluorescence quantum yield can be realized simultaneously.

Waterproof perovskites: high fluorescence quantum yield and stability from a methylammonium lead bromide/formate mixture in water

2020 ◽  
Vol 8 (17) ◽  
pp. 5873-5881 ◽  
Author(s):  
Yeasin Khan ◽  
Yohan Ahn ◽  
Hyuna Lee ◽  
Jaeki Jeong ◽  
Yun Seop Shin ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Precursor Solution ◽  
Lead Bromide ◽  
High Fluorescence ◽  
High Fluorescence Quantum Yield

We’ve observed intense, water-stable fluorescence from lead formate crystals when they are precipitated from a CH3NH3PbBr3 (MAPbBr3) perovskite precursor solution.

Electronic Structure and Photophysical Characteristics of Substituted 3-(2-Benzthiazolyl)-Coumarins and Coumarinimines

1987 ◽  
Vol 42 (9) ◽  
pp. 987-993
Author(s):  
P. Nikolova ◽  
N. Tyutyulkova ◽  
V. Dryanska
Keyword(s):  
Electronic Structure ◽  
Quantum Yield ◽  
Quantum Chemical ◽  
Fluorescence Quantum Yield ◽  
Spectral Properties ◽  
High Fluorescence ◽  
High Fluorescence Quantum Yield

The spectral properties of a group of 3-(2-benzthiazolyl)-coumarins and coumarinimines, some of them having high fluorescence quantum yield (Qf > 0.7), are described.The quantum -chemical investigations show that the main chromophore of this group of dyes is the 3 -(2-thiazolyl)-2 H -pyran -2-one fragmenti.e . the coumarin (coumarinimine) and the benzthiazolyl fragments are not separate chromophores.

New Synthesis of a Dibenzoperylene Motif Featuring a Doubly Boron–Nitrogen-Doped Bay Region

Synthesis ◽  
2019 ◽  
Vol 51 (22) ◽  
pp. 4147-4152 ◽  
Author(s):  
Michael Fingerle ◽  
Simon Stocker ◽  
Holger F. Bettinger
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Blue Fluorescence ◽  
Aniline Derivative ◽  
Nitrogen Doped ◽  
New Synthesis ◽  
Polycyclic Aromatic ◽  
High Fluorescence ◽  
Boron Nitrogen ◽  
High Fluorescence Quantum Yield

A dibenzoperylene motif featuring a doubly boron–nitrogen-doped bay region is accessible from an aniline derivative in six steps in good overall yield. Two n-butyl groups provide the BN-doped polycyclic aromatic hydrocarbon with sufficient solubility in common organic solvents. The synthesis sequence allows installation of a second boron atom next to a weakly nucleophilic nitrogen by using a protected boron species. The title compound shows blue fluorescence, an extremely high fluorescence quantum yield, and an interesting doped bay region.

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