Synthesis and fluorescence study of conjugated polymers based on 2,4,6-triphenylpyridine moieties

2016 ◽  
Vol 40 (7) ◽  
pp. 6281-6288 ◽  
Author(s):  
Qianping Ran ◽  
Jianfeng Ma ◽  
Tao Wang ◽  
Shimin Fan ◽  
Yong Yang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Fluorescence Emission ◽  
Band Gaps ◽  
Quantum Yields ◽  
Fluorescence Study ◽  
Strong Fluorescence ◽  
High Quantum ◽  
Stokes Shifts

Three novel 2,4,6-triphenylpyridine-based conjugated polymers showed strong fluorescence emission with large Stokes' shifts, tunable band gaps and high quantum yields.

Thiolated DNA-templated silver nanoclusters with strong fluorescence emission and a long shelf-life

Nanoscale ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 76-81 ◽  
Author(s):  
Xiaohong Zhang ◽  
Yunxia Qian ◽  
Xuejuan Ma ◽  
Mengfan Xia ◽  
Shuangqin Li ◽  
...  
Keyword(s):  
Shelf Life ◽  
Functional Groups ◽  
Fluorescence Emission ◽  
Silver Nanoclusters ◽  
Quantum Yields ◽  
Strong Fluorescence ◽  
High Quantum

The combination of different functional groups in thiolated DNA resulted in high quantum yields and long shelf-lives of silver nanoclusters.

New Base-Dopable Well-Defined Poly-2,7-Fluorene Derivatives

1997 ◽  
Vol 488 ◽  
Author(s):  
M. Ranger ◽  
M. Leclerc
Keyword(s):  
Conjugated Polymers ◽  
Blue Emission ◽  
Polymeric Materials ◽  
Quantum Yields ◽  
Synthetic Method ◽  
High Quantum ◽  
Double Function ◽  
Electrical Conductivities ◽  
Palladium Catalyzed ◽  
Polyfluorene Derivatives

AbstractWell-defined poly(2,7-fluorene) derivatives have been prepared through palladium-catalyzed couplings; using this versatile synthetic method, processable polyfluorenes have been obtained in good yields. In solution, these yellow polymers exhibit blue emission around 410 nm with high quantum yields. Moreover, novel acidic polyfluorene derivatives have been synthesized (e.g. poly(2,7'-(pentyl 9,9-dioctyl-7,2'-bifluorene-9'-carbonyl))) which show, upon base-doping, electrical conductivities of 10−2 − 10−3 S/cm. This new doping method for conjugated polymers could open the way to the preparation of air-stable electron-injecting electrodes. Polyfluorene derivatives show their potential to play a double function in the fabrication of LEDs, i.e. as ntype electrode and luminescent polymeric materials.

Synthesis and Photophysical Properties of 1,4-Dihydro-2H,5H-chromeno[4,3-d][1,3]oxazin-5-ones, and Derivatives Containing Tethered 1,2,3-Triazoles, from 4-Aminocoumarins

Synthesis ◽  
2019 ◽  
Vol 51 (15) ◽  
pp. 2965-2976
Author(s):  
Marina C. Dilelio ◽  
Nathan P. Brites ◽  
Larissa A. Vieira ◽  
Bernardo A. Iglesias ◽  
Teodoro S. Kaufman ◽  
...  
Keyword(s):  
Nitrogen Atom ◽  
Click Chemistry ◽  
Photophysical Properties ◽  
Quantum Yields ◽  
One Pot ◽  
Alkyl Aryl ◽  
Triazole Derivatives ◽  
High Quantum ◽  
Stokes Shifts

A facile protocol for the unprecedented one-pot H2SO4-mediated hydroxymethylation/cyclative N,O-acetalization of 4-aminocoumarins to 1,4-dihydro-2H,5H-chromeno[4,3-d][1,3]oxazin-5-ones, in moderate to good yields, was developed and optimized. The scope and limitations of the transformation, which takes place in water or water/THF mixtures, were also studied. The nitrogen atom of the resulting tricycles was used to tether alkyl, aryl and 1,2,3-triazolylmethyl moieties, employing a two-step click chemistry approach for the latter. The photophysical properties of the heterocycles, as well as of their 1,2,3-triazole derivatives, were also examined. The N-aryl derivatives exhibited high quantum yields of fluorescence (up to Φf = 0.69) and very large Stokes shifts (up to 201 nm).

Biological Sensing and Imaging Using Conjugated Polymers and Peptide Substrates

2020 ◽  
Vol 27 ◽  
Author(s):  
Pan Wu ◽  
Chunyan Tan
Keyword(s):  
Conjugated Polymers ◽  
Fluorescence Emission ◽  
Living Cells ◽  
Fluorescent Imaging ◽  
Biological Sensing ◽  
Strong Fluorescence ◽  
Peptide Substrates ◽  
Enzyme Substrates ◽  
Cell Penetrating ◽  
Recognition Elements

: Peptides have been widely applied as targeting elements or enzyme-substrates in biological sensing and imaging. Conjugated polymers (CPs) have emerged as a novel biosensing material and received considerable attention due to their excellent light absorption, strong fluorescence emission, as well as amplified quenching properties. In this review, we summarize the recent advances of using CPs and peptide substrates in biosensing and bioimaging. After a brief introduction of the advantages of CPs and peptide substrates, different sensing designs and mechanisms are discussed based on peptides’ structures and functions, including targeting recognition elements, enzyme-substrates, and cell-penetrating elements. Applications of CPs and peptides in fluorescent imaging and Raman imaging in living cells are subsequently reviewed.

scholarly journals Aminomaleimide fluorophores: a simple functional group with bright, solvent dependent emission

2015 ◽  
Vol 51 (47) ◽  
pp. 9733-9736 ◽  
Author(s):  
Anne B. Mabire ◽  
Mathew P. Robin ◽  
Wen-Dong Quan ◽  
Helen Willcock ◽  
Vasilios G. Stavros ◽  
...  
Keyword(s):  
Functional Group ◽  
Quantum Yields ◽  
New Class ◽  
High Quantum ◽  
Stokes Shifts

Amino-substituted maleimides form a new class of highly emissive compounds, with large Stokes shifts (>100 nm) and high quantum yields (up to ∼60%).

Highly efficient orange-red electroluminescence of iridium complexes with good electron mobility

2017 ◽  
Vol 5 (32) ◽  
pp. 8150-8159 ◽  
Author(s):  
Hua-Bo Han ◽  
Rong-Zhen Cui ◽  
Yi-Ming Jing ◽  
Guang-Zhao Lu ◽  
You-Xuan Zheng ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Electron Mobility ◽  
Quantum Yields ◽  
Iridium Complexes ◽  
Maximum Luminance ◽  
High Quantum ◽  
Highly Efficient ◽  
Maximum Current ◽  
Low Efficiency

Two orange-red iridium complexes with high quantum yields and good electron mobility were applied in efficient OLEDs showing a maximum luminance of 129 466 cd m−2, a maximum current efficiency of 62.96 cd A−1 with low efficiency roll-off.

scholarly journals Dansylated analogues of the opioid peptide [Dmt1]DALDA: in vitro activity profiles and fluorescence parameters.

2004 ◽  
Vol 51 (1) ◽  
pp. 107-113 ◽  
Author(s):  
Irena Berezowska ◽  
Carole Lemieux ◽  
Nga N Chung ◽  
Bogumil Zelent ◽  
Peter W Schiller
Keyword(s):  
Hydrophobic Interactions ◽  
Fluorescence Emission ◽  
Opioid Peptide ◽  
Quantum Yields ◽  
Binding Studies ◽  
Dansyl Group ◽  
Distribution Studies ◽  
Peptide Agonist ◽  
Diaminopropionic Acid

Dansylated analogues of the potent and selective micro opioid peptide agonist [Dmt(1)]DALDA (H-Dmt-D-Arg-Phe-Lys-NH(2); Dmt = 2',6'-dimethyltyrosine) were prepared either by substitution of N(beta)-dansyl-alpha,beta-diaminopropionic acid or N(epsilon)-dansyllysine for Lys(4), or by attachment of a dansyl group to the C-terminal carboxamide function via a linker. All three analogues displayed high micro agonist potency in vitro and the C-terminally dansylated one retained significant micro receptor selectivity. The three analogues showed interesting differences in their fluorescence emission maxima and quantum yields, indicating that the dansyl group in two of them was engaged in intramolecular hydrophobic interactions. These dansylated [Dmt(1)]DALDA analogues represent valuable tools for binding studies, cellular uptake and intracellular distribution studies, and tissue distribution studies.

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