Search results for "Thiazine"
showing 10 items of 67 documents
Trilateral π-conjugation extensions of phenothiazine-based dyes enhance the photovoltaic performance of the dye-sensitized solar cells
2016
Abstract Two novel organic dyes TLEP-1 and TLEP-2 based on phenothiazine with trilateral π-conjugation extensions were designed and synthesized for dye-sensitized solar cells, where phenothiazine ring was linked with two phenyl moieties at 7- and 10-positions as the first and second π-conjugation extensions, and with furan or thiophene ring at 3-position as the third π-conjugation extension for TLEP-1 and TLEP-2, respectively. The influence of the π-conjugation extensions on the photovoltaic performance was evaluated. The cell based on TLEP-2 exhibits an impressive short-circuit photocurrent density of 14.87 mA cm−2, which is much higher than the cell based on the reference dye without π-co…
Conjugating pillararene dye in dye-sensitized solar cells
2021
Summary The improvement of open-circuit voltage (VOC) is a crucial goal to develop efficient dye-sensitized solar cells (DSSCs). Here, conjugating pillar[5]arene dyes (PPI and PPII) are designed, synthesized, and applied in DSSCs. The presence of pillar[5]arene moiety in the dyes inhibits the dye aggregation and charge recombination in the DSSCs, leading to the enhancement of VOC. PPI with a single D-π-A backbone and a pillar[5]arene moiety achieves a VOC of 715 mV, which is much higher than the reference dye (VOC of 674 mV) with the same D-π-A backbone but no pillar[5]arene moiety. PPII with 2 D-π-A backbones also achieves a VOC of 746 mV and a much higher short-circuit photocurrent (JSC) …
Impact of the position isomer of the linkage in the double D–A branch-based organic dyes on the photovoltaic performance
2014
Abstract Three organic dyes with double D–A system were synthesized and applied in the dye-sensitized solar cells. These dyes contain phenothiazine as an electron donor and cyanoacetic acid as an acceptor/anchor. Linkages were incorporated at the ortho-, meta- and para-positions and their impact on the performance of photovoltaic was observed. Among them, the dye with a para-position linkage exhibited the highest short-circuit photocurrent density (12.26 mA cm−2) and open-circuit photovoltage (756 mV), leading to the best overall efficiency (6.14%) due to better light harvesting capacity under standard global 1.5 AM conditions. Under similar measuring conditions the dyes with ortho and meta…
Synthesis and photovoltaic performance of asymmetric di-anchoring organic dyes
2015
Abstract Two novel metal-free organic dyes bearing two asymmetric double donor–acceptor segments were synthesized. Their physical, optical, electrochemical properties and photovoltaic performances were investigated. Compared with the mono-anchoring dye containing single donor–acceptor chain, these new dyes exhibited a broader and much stronger absorption in the light wavelength ranging from 400 to 600 nm, showed higher IPCE values and short-circuit current density, which led to more efficient photovoltaic performance. The dye with triphenylamine and phenothiazine as two electron donors and two cyanoacrylic acids as two electron acceptors exhibited an impressive power conversion efficiency o…
FIA-spectrophotometric determination of N-substituted phenothiazine derivatives by oxidation with a solid-phase reactor of manganese dioxide incorpor…
1995
Abstract The determination of several N -substituted phenothiazine derivatives was carried out by the reaction of the drug with managanese dioxide entrapped in a polymeric material in a packed-bed reactor; the oxidized drug was monitored at λ max . The calibration graph is linear over the range 5–50 μg/ml of phenothiazine derivatives with a relative standard deviation of 0.5–1% (at 10 μg/ml) and sample throughput of 40–48 h −1 . The influence of foreign compounds was studied and the method was applied to the determination of six different phenothiazine derivatives in pharmaceutical formulations.
Enantioselective alkynylation of benzo[e][1,2,3]-oxathiazine 2,2-dioxides catalysed by (R)-VAPOL-Zn complexes: synthesis of chiral propargylic cyclic…
2015
[EN] (R)-VAPOL-Zn(II) complexes catalysed the enantioselective addition of terminal alkynes to cyclic benzoxathiazine 2,2-dioxides, providing the corresponding chiral propargylic sulfamidates with high yields (up to 93%) and good enantiomeric excesses (up to 87%).
Does the change in the length of the alkyl chain bring us closer to the compounds with the expected photophysical and biological properties? – Studie…
2022
The novel imidazole-based phenothiazine derivatives 3a-3e differing in the length of the alkyl chain at the imidazole substituents were effectively designed and synthesized. The effect of the alkyl chain on the photophysical properties of novel compounds was systematically investigated and supported by TD/DFT calculations. The photophysical characterization of 3a-3e compounds was performed in a series of solvents. Both absorption and fluorescence spectra exhibited positive solvatochromism. Phenothiazine derivatives 3a-3e have a noteworthy emission from blue to yellow region 450–600 nm, high quantum yields 41–93%, lifetimes in nanosecond scale (4.01–7.55 ns), and Stokes shifts in the range o…
CCDC 1846586: Experimental Crystal Structure Determination
2018
Related Article: Carlos Vila, Arturo Tortosa, Gonzalo Blay, M. Carmen Muñoz, José R. Pedro|2019|New J.Chem.|43|130|doi:10.1039/C8NJ05577G
CCDC 1519807: Experimental Crystal Structure Determination
2017
Related Article: Petra Vasko, Juha Hurmalainen, Akseli Mansikkamäki, Anssi Peuronen, Aaron Mailman, Heikki M. Tuononen|2017|Dalton Trans.|46|16004|doi:10.1039/C7DT03243A
CCDC 1402447: Experimental Crystal Structure Determination
2015
Related Article: Marc Montesinos-Magraner, Rubén Cantón, Carlos Vila, Gonzalo Blay, Isabel Fernández, M. Carmen Muñoz, José R. Pedro|2015|RSC Advances|5|60101|doi:10.1039/C5RA11168D