scholarly journals Porphyrin-based donor-acceptor COFs as efficient and reusable photocatalysts for PET-RAFT polymerization under broad spectrum excitation

2021 ◽  
Author(s):  
Yifan Zhu ◽  
Dongyang Zhu ◽  
Yu Chen ◽  
Qianqian Yan ◽  
Chun-Yen Liu ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Broad Spectrum ◽  
Organic Materials ◽  
Raft Polymerization ◽  
Covalent Organic Frameworks ◽  
Optical And Electronic Properties ◽  
Donor Acceptor ◽  
Spectrum Excitation ◽  
Structural Versatility

Covalent organic frameworks (COFs) are crystalline and porous organic materials attractive for photocatalysis applications due to their structural versatility and tunable optical and electronic properties. The use of photocatalysts (PCs)...

scholarly journals Comparing non-fullerene acceptors with fullerene in polymer solar cells: a case study with FTAZ and PyCNTAZ

2017 ◽  
Vol 5 (10) ◽  
pp. 4886-4893 ◽  
Author(s):  
Nicole Bauer ◽  
Qianqian Zhang ◽  
Jingbo Zhao ◽  
Long Ye ◽  
Joo-Hyun Kim ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electronic Properties ◽  
Organic Photovoltaics ◽  
Polymer Solar Cells ◽  
Electron Acceptors ◽  
Optical And Electronic Properties ◽  
Structural Versatility

Non-fullerene acceptors (NFAs) are becoming a serious contender to fullerene-based electron acceptors in organic photovoltaics, due to their structural versatility and easily tunable optical and electronic properties.

Synthetic Methods for Novel Benzofuran Derivatives and their Biological Activities

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Bidyut Kumar Senapati
Keyword(s):  
Electronic Properties ◽  
Heterocyclic Compound ◽  
Broad Spectrum ◽  
Biological Activities ◽  
Synthetic Methods ◽  
Present Review ◽  
The Past ◽  
Optical And Electronic Properties ◽  
Novel Approaches ◽  
Derivatives Of

Benzofuran is the heterocyclic compound consisting of fused benzene and furan rings. The benzofuran moiety is widely distributed in both natural and artificial molecules. Substituted benzofurans are pharmaceutically important heterocycles that display numerous biological activities such as antimicrobial, antifungal, antiHIV, anticancer, antimalarial, anti-inflammatory activities. Some derivatives of benzofurans are also used as organic materials due to their optical and electronic properties. Owing to their broad spectrum applications, it is of great significance to develop systematic and novel approaches to benzofurans. During the past decades, many synthetic efforts have been devoted so far to the synthesis of benzofuran derivatives. The present review highlights the recently synthesized benzofurans and their biological activities.

scholarly journals A combined study of mesomorphism, optical, and electronic properties of donor-acceptor columnar liquid crystals

2011 ◽  
Author(s):  
S. Holger Eichhorn ◽  
Shuai Chen ◽  
Mohamed Ahmida ◽  
Andrey Demenev ◽  
Himadri Kayal ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Electronic Properties ◽  
Optical And Electronic Properties ◽  
Donor Acceptor

Vice versa donor acceptor fluorene–ferrocene alternate copolymer: a twisted ribbon for electrical switching

2015 ◽  
Vol 51 (66) ◽  
pp. 13123-13126 ◽  
Author(s):  
Chanchal Chakraborty ◽  
Manas Kumar Bera ◽  
Utpal Rana ◽  
Sudip Malik
Keyword(s):  
Electronic Properties ◽  
Electrical Switching ◽  
Optical And Electronic Properties ◽  
Donor Acceptor

Two donor–acceptor type copolymers (PFFC-1 and PFFC-2) containing ferrocene and fluorene moieties have been successfully synthesized to evaluate the redox triggered optical and electronic properties.

scholarly journals Nanoporous and nonporous conjugated donor–acceptor polymer semiconductors for photocatalytic hydrogen production

2021 ◽  
Vol 12 ◽  
pp. 607-623
Author(s):  
Zhao-Qi Sheng ◽  
Yu-Qin Xing ◽  
Yan Chen ◽  
Guang Zhang ◽  
Shi-Yong Liu ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Electronic Properties ◽  
High Performance ◽  
Carrier Mobility ◽  
Material Design ◽  
Charge Carrier Mobility ◽  
Polymer Semiconductors ◽  
Optical And Electronic Properties ◽  
Donor Acceptor ◽  
Catalytic Mechanisms

Conjugated polymers (CPs) as photocatalysts have evoked substantial interest. Their geometries and physical (e.g., chemical and thermal stability and solubility), optical (e.g., light absorption range), and electronic properties (e.g., charge carrier mobility, redox potential, and exciton binding energy) can be easily tuned via structural design. In addition, they are of light weight (i.e., mainly composed of C, N, O, and S). To improve the photocatalytic performance of CPs and better understand the catalytic mechanisms, many strategies with respect to material design have been proposed. These include tuning the bandgap, enlarging the surface area, enabling more efficient separation of electron–hole pairs, and enhancing the charge carrier mobility. In particular, donor–acceptor (D–A) polymers were demonstrated as a promising platform to develop high-performance photocatalysts due to their easily tunable bandgaps, high charge carrier mobility, and efficient intramolecular charge transfer. In this minireview, recent advances of D–A polymers in photocatalytic hydrogen evolution are summarized with a particular focus on modulating the optical and electronic properties of CPs by varying the acceptor units. The challenges and prospects associated with D–A polymer-based photocatalysts are described as well.

Thieno[3,4-b]pyrazine-based oligothiophenes: simple models of donor–acceptor polymeric materials

2014 ◽  
Vol 16 (16) ◽  
pp. 7231-7240 ◽  
Author(s):  
Li Wen ◽  
Christopher L. Heth ◽  
Seth C. Rasmussen
Keyword(s):  
Electronic Properties ◽  
Polymeric Materials ◽  
Conjugation Length ◽  
Optical And Electronic Properties ◽  
Donor Acceptor ◽  
Simple Models

Thieno[3,4-b]pyrazine-based oligomers have been thoroughly investigated in order to correlate the effects of conjugation length and ‘donor–acceptor’ properties on the resulting optical and electronic properties.

scholarly journals Research progress of polydiacetylene sensing materials in food biotechnology

2021 ◽  
Vol 261 ◽  
pp. 02090
Author(s):  
Hui Wang ◽  
Li Han ◽  
Weijuan Gong ◽  
Ranran Chu
Keyword(s):  
Electronic Properties ◽  
Organic Solvents ◽  
Visual Detection ◽  
Research Progress ◽  
Food Biotechnology ◽  
Colorimetric Response ◽  
Optical And Electronic Properties ◽  
Donor Acceptor ◽  
Biosensor Analysis ◽  
External Stimuli

Polydiacetylene (PDAs) is a special semiconductor polymer with an alternating conjugated structure of ene-acetylene and unique optical and electronic properties. Typically, PDAs change from blue to red in response to the external stimuli, such as temperature, pH, ions, organic solvents, pressure, and donor-acceptor interactions. This colorimetric response of PDAs makes them one of the excellent materials for chemical or biosensor analysis platforms. In this review, we briefly describe the research progress of polydiacetylene systems in the field of food biotechnology. The challenges and outlooks of PDAs sensing materials in visual detection of preservatives in food innovatively were also discussed.

Intercalation of First Row Transition Metals inside Covalent-Organic Frameworks (COF): a Strategy to Fine Tune the Electronic Properties of Porous Crystalline Materials

2018 ◽  
Author(s):  
Srimanta Pakhira ◽  
Jose Mendoza-Cortes
Keyword(s):  
Transition Metal ◽  
Transition Metals ◽  
Electronic Properties ◽  
High Surface ◽  
Electronic Devices ◽  
High Surface Area ◽  
Main Role ◽  
Covalent Organic Frameworks ◽  
Porous Network ◽  
Crystalline Materials

<div>Covalent organic frameworks (COFs) have emerged as an important class of nano-porous crystalline materials with many potential applications. They are intriguing platforms for the design of porous skeletons with special functionality at the molecular level. However, despite their extraordinary properties, it is difficult to control their electronic properties, thus hindering the potential implementation in electronic devices. A new form of nanoporous material, COFs intercalated with first row transition metal is proposed to address this fundamental drawback - the lack of electronic tunability. Using first-principles calculations, we have designed 31 new COF materials <i>in-silico</i> by intercalating all of the first row transition metals (TMs) with boroxine-linked and triazine-linked COFs: COF-TM-x (where TM=Sc-Zn and x=3-5). This is a significant addition considering that only 187 experimentally COFs structures has been reported and characterized so far. We have investigated their structure and electronic properties. Specifically, we predict that COF's band gap and density of states (DOSs) can be controlled by intercalating first row transition metal atoms (TM: Sc - Zn) and fine tuned by the concentration of TMs. We also found that the $d$-subshell electron density of the TMs plays the main role in determining the electronic properties of the COFs. Thus intercalated-COFs provide a new strategy to control the electronic properties of materials within a porous network. This work opens up new avenues for the design of TM-intercalated materials with promising future applications in nanoporous electronic devices, where a high surface area coupled with fine-tuned electronic properties are desired.</div>

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