scholarly journals Novel Fluorescent Fluorene-Containing Conjugated Polymers: Synthesis, Photophysical Properties, and Application for the Detection of Common Bisphenols

Synlett ◽  
2018 ◽  
Vol 29 (19) ◽  
pp. 2515-2522 ◽  
Author(s):  
Mindy Levine ◽  
Daniel Jones ◽  
Ryan Vallee
Keyword(s):  
Conjugated Polymers ◽  
Photophysical Properties ◽  
Fluorescence Properties ◽  
Polycondensation Reaction ◽  
Suzuki Polycondensation ◽  
Nanoparticle Suspensions ◽  
Stokes Shifts

Eight new fluorescent conjugated polymers were synthesized by the Suzuki polycondensation reaction of 9,9-dioctylfluorene-2,7-diboronic acid bis(1,3-propanediol) ester and a conjugated dihalogenated monomer. The photophysical properties of these polymers were investigated as well-dissolved solutions in chloroform and as nanoparticle suspensions in water. Several of the polymers had large Stokes shifts (greater than 100 nm) and others demonstrated unique changes in the fluorescence properties in aggregated verse nonaggregated forms. Preliminary applications of these polymers in the detection of common bisphenols are also reported.

scholarly journals Dithienopyrrole-based monomers as an acceptor unit building for synthesis of donor – acceptor conjugated polymers

2016 ◽  
Vol 19 (3) ◽  
pp. 99-107
Author(s):  
Tam Huu Nguyen ◽  
Thu Anh Nguyen ◽  
Viet Quoc Nguyen ◽  
Trung Thanh Nguyen ◽  
Ha Tran Nguyen
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Conjugated Polymers ◽  
Fourier Transform Infrared ◽  
Polycondensation Reaction ◽  
Suzuki Polycondensation ◽  
Donor Acceptor ◽  
Ft Ir ◽  
Nuclear Magnetic

A new monomer of N-benzoyl dithieno[2,3-b:2’,3’-d]pyrrole (BDP), has been successfully prepared via copper-catalyzed amidation. Then, this monomer was brominated to form 2,6-dibromo-n-benzoyl dithieno[2,3-b:2’,3’-d]pyrrole (DiBDP) monomer. The structures of monomers were confirmed via the nuclear magnetic resonance (1HNMR) and Fourier transform infrared (FT-IR). BDP and DiBDP monomers will be used as monomers for Suzuki polycondensation reaction to synthesize the donor-acceptor (D-A) conjugated polymers.

A mechanistic investigation of the Suzuki polycondensation reaction using MS/MS methods

2021 ◽  
Author(s):  
Michelle Yan Chi Ting ◽  
Lars Yunker ◽  
Ian C. Chagunda ◽  
Katherine Hatlelid ◽  
Meghan Vieweg ◽  
...  
Keyword(s):  
Catalytic Reactions ◽  
Polycondensation Reaction ◽  
Suzuki Polycondensation ◽  
Mechanistic Investigation ◽  
Reaction Proceeds

Understanding catalytic reactions is inherently difficult because not only is the catalyst the least abundant component in the mixture, but it also takes many different forms as the reaction proceeds....

scholarly journals New Approach in the Application of Conjugated Polymers: The Light-Activated Source of Versatile Singlet Oxygen Molecule

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1098
Author(s):  
Agata Blacha-Grzechnik
Keyword(s):  
Conjugated Polymers ◽  
Singlet Oxygen ◽  
Near Infrared ◽  
Photophysical Properties ◽  
Short Review ◽  
The Novel ◽  
New Approach ◽  
Intermolecular Energy ◽  
Intermolecular Energy Transfer ◽  
High Absorption

For many years, the research on conjugated polymers (CPs) has been mainly focused on their application in organic electronics. Recent works, however, show that due to the unique optical and photophysical properties of CPs, such as high absorption in UV–Vis or even near-infrared (NIR) region and efficient intra-/intermolecular energy transfer, which can be relatively easily optimized, CPs can be considered as an effective light-activated source of versatile and highly reactive singlet oxygen for medical or catalytic use. The aim of this short review is to present the novel possibilities that lie dormant in those exceptional polymers with the extended system of π-conjugated bonds.

Effect of substituents on absorption and fluorescence properties of pyrazolo[3,4-b]pyrrolo[2,3-d]pyridines

2008 ◽  
Vol 86 (11) ◽  
pp. 1070-1076 ◽  
Author(s):  
Bhausaheb K Ghotekar ◽  
Muddassar A Kazi ◽  
Madhukar N Jachak ◽  
Raghunath B Toche
Keyword(s):  
Good Yield ◽  
Substituent Effect ◽  
Photophysical Properties ◽  
Fluorescence Properties ◽  
Absorption And Emission ◽  
Effect Of Substituents ◽  
Convenient Route

A convenient route was successfully developed for the synthesis of novel heterocycles such as pyrazolo[3,4-b]pyrrolo[2,3-d]pyridines (PPP) from pyrazolo[3,4-b]pyridines in good yield. The PPP derivatives synthesized were further studied for their photophysical properties, and it was observed that absorption and emission λmax changed, owing to the substituent effect at 4 positions. These compounds were obtained from highly reactive starting materials, 5-aminopyrazoles and α-acetyl γ-butyrolactone.Key words: α-acetyl γ-butyrolactone, pyrazolo[3,4-b]pyrrolo[2,3-d] pyridine, absorption, emission, fluorescence.

Extended fluorescent uridine analogues: synthesis, photophysical properties and selective interaction with BSA protein

2020 ◽  
Vol 44 (34) ◽  
pp. 14744-14754 ◽  
Author(s):  
Ajaykumar V. Ardhapure ◽  
Vijay Gayakhe ◽  
Shatrughn Bhilare ◽  
Anant R. Kapdi ◽  
Subhendu Sekhar Bag ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Fluorescence Properties ◽  
Selective Interaction ◽  
Fluorescent Nucleosides

The improvement in fluorescence properties of 2′-deoxyuridine was made possible by the introduction of (hetero)aromatic moieties at the C–5 position of uridine with alkenyl/phenyl/styryl linkers to create a library of useful fluorescent nucleosides.

The effect of the macrocyclic encapsulation on the photophysical properties of conjugated polymers

2018 ◽  
Author(s):  
Aurica Farcas ◽  
Mihaela Balan-Porcarasu ◽  
Ana-Maria Resmerita ◽  
Mihai Asandulesa ◽  
Angela Rotaru ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Photophysical Properties

Synthesis and Photophysical Properties of 3-(Trifluoromethyl)-2H-imidazo[5,1-a]isoquinolinium Chloride Derivatives

Synlett ◽  
2017 ◽  
Vol 29 (03) ◽  
pp. 296-300 ◽  
Author(s):  
Ali Darehkordi ◽  
Fariba Rahmani ◽  
Mahin Ramezani ◽  
Alireza Bazmandegan-Shamili
Keyword(s):  
Blue Light ◽  
Uv Radiation ◽  
Photophysical Properties ◽  
Molecular Probes ◽  
Quantum Yields ◽  
Light Emitting ◽  
Fluorescence Studies ◽  
Fluorescence Quantum Yields ◽  
Fluorescent Molecular Probes ◽  
Stokes Shifts

A series of novel blue-light-emitting 2H-imidazo[5,1-a]isoquinolinium chloride derivatives were synthesized by the reaction of isoquinoline with trifluoroacetimidoyl chlorides and isocyanides in dry CH2Cl2 in excellent yields. Fluorescence studies showed that the compounds absorb UV radiation and then emit blue light at about 481 nm with moderate to good fluorescence quantum yields. These compounds also showed high Stokes shifts, and can be used to develop ­ultrasensitive fluorescent molecular probes to study a variety of biological events and processes.

Synthesis and Photophysical Properties of Conjugated Polymers with Pendant 9,10-Anthraquinone Units

2008 ◽  
Vol 112 (16) ◽  
pp. 4953-4960 ◽  
Author(s):  
Rafael Gómez ◽  
Raúl Blanco ◽  
Dirk Veldman ◽  
José L. Segura ◽  
René A. J. Janssen
Keyword(s):  
Conjugated Polymers ◽  
Photophysical Properties

Synthesis of thiophene-containing conjugated polymers from 2,5-thiophenebis(boronic ester)s by Suzuki polycondensation

2013 ◽  
Vol 4 (4) ◽  
pp. 895 ◽  
Author(s):  
Meifang Liu ◽  
Yulan Chen ◽  
Chi Zhang ◽  
Cuihong Li ◽  
Weiwei Li ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Boronic Ester ◽  
Suzuki Polycondensation
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