Synthesis and Photovoltaic Properties of 1,8‐Carbazole‐Based Donor–Acceptor Type Conjugated Polymers

Fujita, Hiroyuki; Michinobu, Tsuyoshi

doi:10.1002/macp.201100591

Cited by 12 publications

(20 citation statements)

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“…Fujita and Michinobu [ 178 ] synthesized a carbazole-based conjugated polymer as donor–acceptor type alternating copolymers. Different type of poly(1,8-diethynylcarbazole) were synthesized and their fluorescence and electrochemical properties were evaluated being adequate to be used as a p-type semiconductor in solar cells.…”

Section: Applicationmentioning

confidence: 99%

Polycarbazole and Its Derivatives: Synthesis and Applications. A Review of the Last 10 Years

et al. 2020

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Polycarbazole and its derivatives have been extensively used for the last three decades, although the interest in these materials briefly decreased. However, the increasing demand for conductive polymers for several applications such as light emitting diodes (OLEDs), capacitators or memory devices, among others, has renewed the interest in carbazole-based materials. In this review, the synthetic routes used for the development of carbazole-based polymers have been summarized, reviewing the main synthetic methodologies, namely chemical and electrochemical polymerization. In addition, the applications reported in the last decade for carbazole derivatives are analysed. The emergence of flexible and wearable electronic devices as a part of the internet of the things could be an important driving force to renew the interest on carbazole-based materials, being conductive polymers capable to respond adequately to requirement of these devices.

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Section: Applicationmentioning

confidence: 99%

Polycarbazole and Its Derivatives: Synthesis and Applications. A Review of the Last 10 Years

et al. 2020

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“…A sharp absorption band at 1047 cm −1 corresponds to the presence of a sugar unit [34]. Some scattered small peaks were observed at 633,618 and 579 cm −1 which reveals the presence of alkane derivatives in the EPS[35].…”

Section: Resultsmentioning

confidence: 99%

Isolation of a novel strain of Lactic Acid Bacteria from traditionally fermented common lime (Citrus aurantifolia) of Assam, India and analysis of exopolymeric substances produced by the strain

Borah¹,

Barman²,

Baishya

2019

Preprint

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1 common lime (Citrus aurantifolia) of Assam, India and analysis of exopolymeric 2 substances produced by the strain. 3 4 5 Abstract 28 29 A gram positive, rod shaped and catalase negative strain of Lactic Acid Bacteria was isolated 30 from traditionally fermented common lime (Citrus aurantifolia) of Assam, North-East India. 31 Bacterial identification was done by using conventional morphological and biochemical 32 methods as well as advanced molecular technique. Traditionally fermented lime juice was 33 serially diluted on selective culture medium and growth of translucent, ropy bacterial colony 34 was observed in the culture plate. Isolated bacteria were identified up to species level by 35 using ribosomal RNA (rRNA) gene sequencing technique. Based on nucleotide homology 36 and phylogenetic analysis the isolate was found to be a strain of Lactobacillus delbrueckii. 37 This is the first report of finding this sub species of Lactic Acid Bacteria in citrus fruit 38 product. The sequence determined in this study has been deposited in the GenBank database 39 with sequential accession number KT198973. The bacterial isolate also produced 40 exopolysaccharide when grown in chemically defined medium. Fourier Transform Infrared 41 Spectroscopy (FTIR) was done for chemical and compositional characterization of partially 42 purified exopolysaccharide. 43 44 Introduction: 50 Lactic acid bacteria (LAB) are one of the most important groups among bacteria due to the 51 "generally recognized as safe (GRAS)" status of this group and their products. The members 52 of this group are mainly characterised for the formation of lactic acid as a final product of the 53 carbohydrate metabolism [1, 2]. The possibility of Lactic acid bacteria in the field of health 54 and nutrition is humongous and this can boast up different sections of traditional treatments. 55 The evidence that LAB can stimulate the immune system is astounding and captivating and 56 opens numerous research areas regarding mechanisms and effective utilization[3]. One of the 57 important aspect of using LAB derived products comprises its cost affectivity as these 58 products can be produced without much difficulty and sophisticated instruments. They have 59 moderately low level of toxicity contrasted with other microbial products [4]. The growing 60 concerns about health and well-being, along with an interest in consuming natural foods, 61 have given probiotics a unique position in the food market. There are lot of documented 62 works with regard to the presence of Lactic acid bacteria in dairy products and for long they 63 are being used extensively as starter culture[5]. However, research had rarely been centered 64 on the microflora found in fermented fruits for the presence of this specific group of bacteria 65 although the microenvironment and nutritive profile of fruits which are rich in nutrients are 66 quite conducive for such bacteria to multiply[6]. Ong et al. reported enterococcus type of 67 LAB in fermented red dragon fruit juice [7]. These bacteria were al...

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“…The synthesis of BT , BT2 , DTBT , DTBT2 , PSN , and PSeN are reported elsewhere. − DPP , isoindigo , NDI , and BBT were newly synthesized by the following general procedure (Scheme ): A solution of 3,6-di- tert -butyl-1,8-diethynyl-9-hexadecyl-9 H -carbazole (0.1134 g 0.2000 mmol) and dibromo-comonomer (0.2000 mmol), namely, 3,6-bis(5-bromothiophen-2-yl)-2,5-dioctyl-2,5-dihydropyrrolo[3,4- c ]pyrrole-1,4-dione, ( E )-6,6′-dibromo-1,1′-dioctyl-[3,3′-biindolinylidene]-2,2′-dione, 4,9-dibromo-2,7-dioctylbenzo[ lmn ][3,8]phenanthroline-1,3,6,8(2 H ,7 H )-tetraone, and 4,7-bis[5-bromo-4-(2-butyloctyl)thiophen-2-yl]benzo[1,2- c :4,5- c ’]bis[1,2,5]thiadiazole, respectively, in 3 mL of toluene and 1 mL of i Pr 2 NH was degassed with nitrogen for 15 min. PdCl 2 (PPh 3 ) 2 (5.7 mg, 0.008 mmol) and CuI (1.5 mg, 0.008 mmol) were added.…”

Section: Methodsmentioning

confidence: 99%

Improved Fluorescence and Brightness of Near-Infrared and Shortwave Infrared Emitting Polymer Dots for Bioimaging Applications

Piwoński

Wang

et al. 2019

ACS Appl. Polym. Mater.

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Development of near-infrared (NIR) and shortwave infrared (SWIR) emitting fluorophores is central to the fluorescence-based bioimaging. While conjugated polymer nanoparticles (polymer dots) are one of the promising fluorophores for this application, obtaining polymer dots that show bright fluorescence, especially in the SWIR wavelength region, has been challenging. Here, we report generalized approach to obtain bright polymer dots through a systematic characterization of photophysical properties of NIR and SWIR emitting polymer dots. Detailed photophysical characterization of a series of polymer dots fabricated using polycarbazole (PCz)based conjugated polymers that adopt bent and twisted conformation reveals that the fluorescence brightness of the PCz-based polymer dots is determined by subtle balance between fluorescence quenching due to polymer chain interaction inside the particles and the twisting between the donor and acceptor moieties of the conjugated polymers inside the particles. Our results provide important insight into the rational design of highly fluorescing SWIR-emitting polymer dots.

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Synthesis and Photovoltaic Properties of 1,8‐Carbazole‐Based Donor–Acceptor Type Conjugated Polymers

Cited by 12 publications

References 57 publications

Polycarbazole and Its Derivatives: Synthesis and Applications. A Review of the Last 10 Years

Polycarbazole and Its Derivatives: Synthesis and Applications. A Review of the Last 10 Years

Isolation of a novel strain of Lactic Acid Bacteria from traditionally fermented common lime (Citrus aurantifolia) of Assam, India and analysis of exopolymeric substances produced by the strain

Improved Fluorescence and Brightness of Near-Infrared and Shortwave Infrared Emitting Polymer Dots for Bioimaging Applications

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