Synthesis and optical properties of π-conjugated polymers composed of diester-substituted bithiophene and dibenzothiophene or carbazole

Lee, Kwang-Hoi; Morino, Kazuhide; Sudo, Atsushi; Endō, Takeshi

doi:10.1007/s00289-010-0372-0

Cited by 10 publications

(6 citation statements)

References 16 publications

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“…1,2,4,5-Tetrabromobenzene (M1), biphenyl, p -terphenyl, N -bromosuccinimide (NBS), and dibenzothiophene dioxide were purchased from TCI. 3,7-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl) 5,5-dioxide (M2), 3,5,3′,5′-tetrakis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)biphenyl (M3), 3,7-dibromodibenzothiophene dioxide (M4), and 3,3′′,5,5′′-tetrakis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,1′,4′,1′′-terphenyl (M5) were synthesized according to the literature procedures. − …”

Section: Methodsmentioning

confidence: 99%

Dibenzothiophene Dioxide Based Conjugated Microporous Polymers for Visible-Light-Driven Hydrogen Production

et al. 2018

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Conjugated microporous polymers (CMPs) have gained much recent attention as a kind of metal-free organic photocatalyst for photocatalytic hydrogen generation. However, the development of a visible-light-driven CMP photocatalyst with high photocatalytic activity is still a big challenge. Here, we report dibenzothiophene dioxide containing CMP photocatalysts and demonstrate the influence of the cross-linker length on the photocatalytic performance for hydrogen production. The most active photocatalyst of DBTD-CMP1 with a short cross-linker of benzene exhibits a high hydrogen evolution rate (HER) of 2460 μmol h–1 g–1 under visible light without Pt cocatalyst. Remarkably, the Pt-loaded DBTD-CMP1 shows an attractive HER of 9200 μmol h–1 g–1 under UV–vis light illumination. This result demonstrates that these dibenzothiophene dioxide containing CMPs are competitive with the most reported porous organic polymer photocatalysts.

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Section: Methodsmentioning

confidence: 99%

Dibenzothiophene Dioxide Based Conjugated Microporous Polymers for Visible-Light-Driven Hydrogen Production

et al. 2018

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“…32,54,55 It is well known that the sulfur atoms of DBT and TA can be oxidised to sulfoxides (SO) 50,[56][57][58][59][60] or sulfones (SO 2 ). 56,57,[60][61][62][63][64][65][66][67][68] For this reason it was considered worth exploring the oxidation of the ligands containing these heterocycles because the sulfoxy group of the new ligands could interact with the metal during catalysis. Phosphine-borane 4-DBT-Me was therefore treated with a variety of oxidants such as MCPBA, 58 H 2 O 2 / HAcO, 60,[64][65][66][67] and CrO 3 /H 5 IO 6 (Scheme 5).…”

Section: Ligand Synthesismentioning

confidence: 99%

Ruthenium complexes of P-stereogenic phosphines with a heterocyclic substituent

et al. 2016

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The synthesis via phosphine-boranes of 13 new optically pure P-stereogenic diarylphosphines P(Het)PhR (Het = 4-dibenzofuranyl (DBF), 4-dibenzothiophenyl (DBT), 4-dibenzothiophenyl-S,S-dioxide (DBTO2) and 1-thianthrenyl (TA); R = OMe, Me, i-Pr, Fc (ferrocenyl)) following the Jugé-Stephan method is described. The ligands were designed with the aim of having a heteroatom in a position capable of interacting with a metal upon coordination. The ligands and their precursors have been fully characterised, including the determination of two crystal structures of phosphine-boranes. Ru neutral complexes of the type [RuCl2(η(6)-arene)(κP-P)] (arene = p-cymene and methyl benzoate) have been prepared and characterised, including three crystal structure determinations. Treatment of solutions of the complexes with TlPF6 allowed the preparation of well-defined cationic complexes [RuCl(η(6)-arene)(κ(2)P,S-P)]PF6 for DBT- and TA-based phosphines. The complexes possess a stereogenic Ru atom and in most of the cases they are present as a single isomer in solution. All the Ru complexes have been used in the asymmetric transfer hydrogenation of acetophenone in refluxing 2-propanol, with good activities and up to 70% ee.

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“…Such materials can be used as information displays in electrophotography, lighting, X-ray intensification and scintillation or for solar energy conversion [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of thermal behavior of photoluminescent copolymers studied by the TG/DTG/FTIR coupled method

Podkościelna

Sobiesiak

2016

J Therm Anal Calorim

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Thermal properties of the photoluminescent copolymers, naphthalene-2,7-diol dimethacrylate derivatives, are presented in this paper. The materials were synthesized by bulk copolymerization of 2,7-(2-hydroxy-3-methacryloyloxypropoxy)naphthalene (2,7-NAF.DM) with four popular vinyl monomers: 2-hydroxyethyl methacrylate (HEMA), butyl acrylate (BA), divinylbenzene (DVB) and styrene (ST). As an initiator, the a,a 0 -azoiso-bis-butyronitrile was used. Thermal stabilities and degradation behaviors of the obtained copolymers were studied by means of the differential scanning calorimetry and thermogravimetric (TG/DTG, in air and in helium atmosphere) analyses. Gases evolved during the thermal treatment were monitored using the TG-FTIR coupled method. The presented copolymers can have potential application as luminophores, protective coatings or fiber-optical sensors.

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Synthesis and optical properties of π-conjugated polymers composed of diester-substituted bithiophene and dibenzothiophene or carbazole

Cited by 10 publications

References 16 publications

Dibenzothiophene Dioxide Based Conjugated Microporous Polymers for Visible-Light-Driven Hydrogen Production

Dibenzothiophene Dioxide Based Conjugated Microporous Polymers for Visible-Light-Driven Hydrogen Production

Ruthenium complexes of P-stereogenic phosphines with a heterocyclic substituent

Characteristics of thermal behavior of photoluminescent copolymers studied by the TG/DTG/FTIR coupled method

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