389-58-2Relevant articles and documents
One-pot cross-coupling of diborylmethane for the synthesis of dithienylmethane derivatives
Endo, Kohei,Ishioka, Takafumi,Shibata, Takanori
, p. 2184 - 2188 (2014)
The one-pot palladium-catalyzed Suzuki-Miyaura cross-coupling reaction of a diborylmethane with bromothiophene derivatives realized the synthesis of various dithienylmethane derivatives. Cyclopentadithiophenes, which are promising compounds in material science, can be obtained in good yields. The in situ generation of an unstable thienylmethylboronate is a key step for the present reaction. Georg Thieme Verlag Stuttgart New York.
Searching for Models Exhibiting High Circularly Polarized Luminescence: Electroactive Inherently Chiral Oligothiophenes
Benincori, Tiziana,Appoloni, Giulio,Mussini, Patricia Romana,Arnaboldi, Serena,Cirilli, Roberto,Quartapelle Procopio, Elsa,Panigati, Monica,Abbate, Sergio,Mazzeo, Giuseppe,Longhi, Giovanna
, p. 11082 - 11093 (2018/08/01)
Two new inherently chiral oligothiophenes characterized by the atropisomeric 3,3′-bithianaphtene scaffold functionalized with fused ring bithiophene derivatives, namely 4H-cyclopenta[2,1-b3:4b′]dithiophene (CPDT) and dithieno[3,3-b:2′,3′-d]pyrrole (DTP), were synthesized. The racemates were fully characterized and resolved into antipodes by enantioselective HPLC. The enantiomers were analyzed through different chiroptical techniques: electronic circular dichroism (ECD) and vibrational circular dichroism (VCD) were employed to attribute the absolute configuration (AC). Comparison of experimental and calculated VCD spectra confirmed the DFT calculated conformational characteristics. The compound functionalized with two CPDT units was oxidized with FeCl3, and ECD and CPL of the resulting material were measured. Circularly polarized luminescence (CPL) was measured to verify if inherently chiral oligothiophenes could be promising systems for chiral photonics applications.
Ligand Engineering for the Efficient Dye-Sensitized Solar Cells with Ruthenium Sensitizers and Cobalt Electrolytes
Aghazada, Sadig,Gao, Peng,Yella, Aswani,Marotta, Gabriele,Moehl, Thomas,Teuscher, Jo?l,Moser, Jacques-E.,De Angelis, Filippo,Gr?tzel, Michael,Nazeeruddin, Mohammad Khaja
supporting information, p. 6653 - 6659 (2016/07/19)
Over the past 20 years, ruthenium(II)-based dyes have played a pivotal role in turning dye-sensitized solar cells (DSCs) into a mature technology for the third generation of photovoltaics. However, the classic I3-/I- redox couple limits the performance and application of this technique. Simply replacing the iodine-based redox couple by new types like cobalt(3+/2+) complexes was not successful because of the poor compatibility between the ruthenium(II) sensitizer and the cobalt redox species. To address this problem and achieve higher power conversion efficiencies (PCEs), we introduce here six new cyclometalated ruthenium(II)-based dyes developed through ligand engineering. We tested DSCs employing these ruthenium(II) complexes and achieved PCEs of up to 9.4% using cobalt(3+/2+)-based electrolytes, which is the record efficiency to date featuring a ruthenium-based dye. In view of the complicated liquid DSC system, the disagreement found between different characterizations enlightens us about the importance of the sensitizer loading on TiO2, which is a subtle but equally important factor in the electronic properties of the sensitizers.