A near-infrared non-fullerene acceptor(NFA) BDTIC, based on thienopyrrole-expanded benzo[1,2-b:4,5-b′]dithiophene unit(heptacyclic S,N-heteroacene) as core, is designed and synthesized. The aromatic pyrrole ring with...A near-infrared non-fullerene acceptor(NFA) BDTIC, based on thienopyrrole-expanded benzo[1,2-b:4,5-b′]dithiophene unit(heptacyclic S,N-heteroacene) as core, is designed and synthesized. The aromatic pyrrole ring with strong electron-donating ability in the core enhances the intramolecular charge transfer effect, finely tunes the optical bandgap and absorption profile of BDTIC, and thus results in a narrowed optical bandgap(E_(g)^(opt)) of 1.38 eV and a near-infrared absorption to 900 nm. When BDTIC is paired with donor polymer PBDB-T to fabricate organic solar cells, the optimized device achieves a best power conversion efficiency of 12.1% with a short-circuit current density of 20.0 mA·cm^(-2) and an open-circuit voltage of 0.88 V. The photovoltaic performance benefits from the broad absorption, weak bimolecular recombination, efficient charge separation and collection, and favorable blend morphology. This work demonstrates that thienopyrroleexpanded benzo[1,2-b:4,5-b′]dithiophene unit(heptacyclic S,N-heteroacene) is a promising building unit to construct high-performance NFAs by enhancing the intramolecular charge transfer effect, broadening absorption as well as maintaining good intermolecular stacking property.展开更多
Corynespora cassiicola is a common plant pathogen responsible for leaf-spotting diseases in the tropical and subtropical areas.C.cassiicola seldom causes human infections.Here we describe a case of subcutaneous phaeoh...Corynespora cassiicola is a common plant pathogen responsible for leaf-spotting diseases in the tropical and subtropical areas.C.cassiicola seldom causes human infections.Here we describe a case of subcutaneous phaeohyphomycosis caused by C.cassiicola in a 76-year-old Chinese man,who presented to our hospital with a purulent discharge and painful sensation on his right leg.Skin biopsy revealed an abscess,and culture confirmed C.cassiicola to be the causative agent.The result was further identified by sequence analysis of the internal transcribed spacer region.The patient was successfully treated with systemic voriconazole and wound debridement:the lesion disappeared after 20 days.展开更多
基金financially supported by the National Key Research and Development Program of China(No.2019YFA0705900)funded by MOST+1 种基金the Basic and Applied Basic Research Major Program of Guangdong Province(No.2019B030302007)the Pearl River Nova Program of Guangzhou(NO.201906010074)。
文摘A near-infrared non-fullerene acceptor(NFA) BDTIC, based on thienopyrrole-expanded benzo[1,2-b:4,5-b′]dithiophene unit(heptacyclic S,N-heteroacene) as core, is designed and synthesized. The aromatic pyrrole ring with strong electron-donating ability in the core enhances the intramolecular charge transfer effect, finely tunes the optical bandgap and absorption profile of BDTIC, and thus results in a narrowed optical bandgap(E_(g)^(opt)) of 1.38 eV and a near-infrared absorption to 900 nm. When BDTIC is paired with donor polymer PBDB-T to fabricate organic solar cells, the optimized device achieves a best power conversion efficiency of 12.1% with a short-circuit current density of 20.0 mA·cm^(-2) and an open-circuit voltage of 0.88 V. The photovoltaic performance benefits from the broad absorption, weak bimolecular recombination, efficient charge separation and collection, and favorable blend morphology. This work demonstrates that thienopyrroleexpanded benzo[1,2-b:4,5-b′]dithiophene unit(heptacyclic S,N-heteroacene) is a promising building unit to construct high-performance NFAs by enhancing the intramolecular charge transfer effect, broadening absorption as well as maintaining good intermolecular stacking property.
基金supported by the Youth Project of National Natural Science Foundation of China(82002113).
文摘Corynespora cassiicola is a common plant pathogen responsible for leaf-spotting diseases in the tropical and subtropical areas.C.cassiicola seldom causes human infections.Here we describe a case of subcutaneous phaeohyphomycosis caused by C.cassiicola in a 76-year-old Chinese man,who presented to our hospital with a purulent discharge and painful sensation on his right leg.Skin biopsy revealed an abscess,and culture confirmed C.cassiicola to be the causative agent.The result was further identified by sequence analysis of the internal transcribed spacer region.The patient was successfully treated with systemic voriconazole and wound debridement:the lesion disappeared after 20 days.
