Multicarbazolyl substituted TTM radicals: red-shift of fluorescence emission with enhanced luminescence efficiency

2017 ◽  
Vol 1 (10) ◽  
pp. 2132-2135 ◽  
Author(s):  
Shengzhi Dong ◽  
Ablikim Obolda ◽  
Qiming Peng ◽  
Yadong Zhang ◽  
Seth Marder ◽  
...  
Keyword(s):  
Fluorescence Emission ◽  
Red Shift ◽  
Luminescence Efficiency ◽  
Enhanced Luminescence

Rotation restricted multicarbazolyl substituted TTM radicals: red-shift of fluorescence emission with enhanced luminescence efficiency.

scholarly journals Tuning the near infrared II emitting wavelength of small molecule dyes by single atom alteration

2020 ◽  
Vol 56 (4) ◽  
pp. 523-526 ◽  
Author(s):  
Kun Qian ◽  
Chunrong Qu ◽  
Xiangyu Ma ◽  
Hao Chen ◽  
Martha Kandawa-Schulz ◽  
...  
Keyword(s):  
Small Molecule ◽  
Near Infrared ◽  
Fluorescence Emission ◽  
Red Shift ◽  
Single Atom

Replacing donors’ S with O and Se will red shift NIR-II dyes’ fluorescence emission and offer good clarity/brightness for imaging.

Enhanced Luminescence Efficiency from Hydrogel Microbead Encapsulated Quantum Dots

2006 ◽  
Vol 959 ◽  
Author(s):  
Arup Neogi ◽  
Santaneel Ghosh ◽  
Jianyou Li ◽  
Tong Cai ◽  
Zhibing Hu
Keyword(s):  
Phase Transition ◽  
Quantum Dots ◽  
Refractive Index ◽  
Optical Properties ◽  
Index Volume ◽  
Volume Density ◽  
Volume Phase Transition ◽  
Thermoresponsive Polymer ◽  
Luminescence Efficiency ◽  
Enhanced Luminescence

ABSTRACTIn this paper, a novel quantum dot (QD) based nanomaterial system is presented for efficient FRET analysis. The quantum dots have been embedded in hydrogel microspheres based on poly(N-isopropylacrylamide) (PNIPAM) a thermoresponsive polymer that undergoes a volume phase transition across the low critical solution (LCST). The optical properties of the quantum dots entrapped within the gel microspheres has been modified due to change in refractive index, volume density of the surrounding hydrogel medium. The QDs encapsulated in the PNIPAM microspheres showed 100–200 % enhancement in the PL efficiency as the microgels shrank at the temperature above the LCST temperature of the gel.

Structural Origin of Enhanced Luminescence Efficiency of Antimony Irradiated InAs Quantum Dots

2011 ◽  
Vol 4 (11) ◽  
pp. 3776-3778
Author(s):  
Ana M. Beltran ◽  
Teresa Ben ◽  
David L. Sales ◽  
Ana M. Sanchez ◽  
Jose M. Ripalda ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Inas Quantum Dots ◽  
Luminescence Efficiency ◽  
Enhanced Luminescence

Synthesis, characterization and fluorescence properties study of meso-tetrakis(1-arylpyrazole-4-yl)porphyrins

2005 ◽  
Vol 09 (06) ◽  
pp. 430-435 ◽  
Author(s):  
Can-Cheng Guo ◽  
Tie-Gang Ren ◽  
Jian Wang ◽  
Chun-Yan Li ◽  
Jian-Xin Song
Keyword(s):  
Elemental Analysis ◽  
Mass Spectra ◽  
Fluorescence Spectra ◽  
Fluorescence Emission ◽  
Red Shift ◽  
Fluorescence Properties ◽  
Quantum Yields ◽  
Fluorescence Quantum Yields ◽  
H Nmr ◽  
Reaction Condition

Five new meso-tetrakis(1-arylpyrazol-4-yl)porphyrins were synthesized to investigate their fluorescence properties. Preparation of these porphyrins was carried out by cyclization of tetramethoxypropane with substituted phenylhydrazine, followed by formylation to give the corresponding aldehydes, which reacted with pyrrole under the Adler reaction condition to get the target porphyrins (1a-1e). All the porphyrins were characterized by 1 H NMR, elemental analysis, UV-vis spectra and mass spectra. Red fluorescence emission of these porphyrins was observed in fluorescence spectra. Compared with meso-tetraphenylporphyrin (TPPH2), these meso-tetrakis(1-arylpyrazol-4-yl) porphyrins had a significant red shift in UV-vis and fluorescence spectra with increased fluorescence quantum yields.

Facile, controllable tune of blue shift or red shift of the fluorescence emission of solid-state carbon dots

2019 ◽  
Vol 374 ◽  
pp. 787-792 ◽  
Author(s):  
Yusha Ma ◽  
Xiaomeng Zhang ◽  
Jianliang Bai ◽  
Kai Huang ◽  
Lili Ren
Keyword(s):  
Solid State ◽  
Carbon Dots ◽  
Fluorescence Emission ◽  
Blue Shift ◽  
Red Shift
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