Photophysics on Surfaces:  Determination of Absolute Fluorescence Quantum Yields from Reflectance Spectra

Langmuir ◽  
2004 ◽  
Vol 20 (9) ◽  
pp. 3690-3697 ◽  
Author(s):  
Martín Mirenda ◽  
M. Gabriela Lagorio ◽  
Enrique San Román
Keyword(s):  
Reflectance Spectra ◽  
Quantum Yields ◽  
Fluorescence Quantum Yields ◽  
Absolute Fluorescence

scholarly journals Nopinone-based aggregation-induced emission (AIE)-active difluoroboron β-diketonate complex: photophysical, electrochemical and electroluminescence properties

RSC Advances ◽  
2018 ◽  
Vol 8 (52) ◽  
pp. 30055-30060 ◽  
Author(s):  
Qian Jiang ◽  
Mingguang Zhang ◽  
Zhonglong Wang ◽  
Jie Song ◽  
Yiqin Yang ◽  
...  
Keyword(s):  
Green Light ◽  
Quantum Yields ◽  
Aggregation Induced Emission ◽  
Fluorescence Quantum Yields ◽  
Absolute Fluorescence

Four difluoroboron (BF2) β-diketonate nopinone complexes 3a–3d which exhibited typical AIE property were synthesized. Owing to high absolute fluorescence quantum yields of 3b, EL device based on 3b was fabricated, which exhibits a blue-green light.

Determination of Polycyclic Aromatic Hydrocarbons in the Presence of Humic Acid in water

2016 ◽  
Vol 70 (9) ◽  
pp. 1520-1528 ◽  
Author(s):  
Ruifang Yang ◽  
Nanjing Zhao ◽  
Xue Xiao ◽  
Shaohui Yu ◽  
Jianguo Liu ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Humic Acid ◽  
Aromatic Hydrocarbons ◽  
Fluorescence Quantum Yield ◽  
Quantum Yields ◽  
Fluorescence Quantum Yields ◽  
Polycyclic Aromatic ◽  
Pahs Concentration ◽  
Test Sets

The presence of humic acid (HA) makes it extremely difficult to determine and quantify accurately polycyclic aromatic hydrocarbons (PAHs) in aquatic environment because of their complex and strong interaction. To solve this problem, a new method was developed in this work through the combination of PARAFAC and fluorescence spectroscopy, which mainly includes: (1) the fluorescence quantum yield acquisition of PAHs with and without HA by PARAFAC; (2) the  concentration score correction of PAHs in validation and test sets using the fluorescence quantum yields; and (3) the prediction of PAHs concentration in the validation and test sets in the presence of HA by corrected concentration. Using this method, the PAHs concentration on the level of µg L−1 in the test samples with HA of 2.5 mg/L and 5.0 mg/L can be successfully predicted with the root mean square error below 0.15 µg L−1, relative error of prediction below 4% for validation samples, recoveries of each PAH between 82.5% and 102.6% for test samples.

Determination of quantum yields of semiconductor nanocrystals at the single emitter level via fluorescence correlation spectroscopy

Nanoscale ◽  
2018 ◽  
Vol 10 (15) ◽  
pp. 7147-7154 ◽  
Author(s):  
Gerardo Abbandonato ◽  
Katrin Hoffmann ◽  
Ute Resch-Genger
Keyword(s):  
Fluorescence Correlation Spectroscopy ◽  
Semiconductor Nanocrystals ◽  
Correlation Spectroscopy ◽  
Quantum Yields ◽  
Fluorescence Correlation ◽  
Fluorescence Quantum Yields ◽  
Ultralow Concentration ◽  
Single Emitter

A microscopy-based method to determine fluorescence quantum yields ΦF of dispersed semiconductor nanocrystals at ultralow concentration with fluorescence correlation spectroscopy (FCS) is presented.

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