Side-chain engineering has been demonstrated as an effective method for fine-tuning the optical,electrical,and morphological properties of organic semiconductors toward efficient organic solar cells(OSCs).In this work...Side-chain engineering has been demonstrated as an effective method for fine-tuning the optical,electrical,and morphological properties of organic semiconductors toward efficient organic solar cells(OSCs).In this work,three isomeric non-fullerene small molecule acceptors(SMAs),named as BTP-4F-T2C8,BTP-4F-T2EH and BTP-4F-T3EH,with linear and branched alkyl chains substituted on the α or β positions of thiophene as the side chains,were synthesized and systematically investigated.The results demonstrate that the size and substitution position of alkyl side chains can greatly affect the electronic properties,molecular packing as well as crystallinity of the SMAs.After blending with donor polymer D18-Cl,the prominent device performance of 18.25% was achieved by the BTP-4F-T3EH-based solar cells,which is higher than those of the BTP-4F-T2EH-based(17.41%)and BTP-4F-T2C8-based(15.92%)ones.The enhanced performance of the BTP-4F-T3EH-based devices is attributed to its stronger crystallinity,higher electron mobility,suppressed bimolecular recombination,and the appropriate intermolecular interaction with the donor polymer.This work reveals that the side chain isomerization strategy can be a practical way in tuning the molecular packing and blend morphology for improving the performance of organic solar cells.展开更多
Pomegranate is one of the most popular fruits worldwide,and contains many bioactive compounds,such as punicalagin,ellagic acid,and gallic acid.Pomegranate and its bioactive compounds possess varieties of health benefi...Pomegranate is one of the most popular fruits worldwide,and contains many bioactive compounds,such as punicalagin,ellagic acid,and gallic acid.Pomegranate and its bioactive compounds possess varieties of health benefits,such as antioxidant,anti-inflammatory,and antimicrobial activities,as well as the prevention and treatment of some chronic diseases,including obesity,diabetes mellitus,cardiovascular disease,liver disease,kidney disease,neurodegenerative diseases,and so on.Pomegranate has been widely utilized in the food industry,such as juice and gluten-free cake production,and its extract for extending the shelf life of food.This review paper summarizes the bioactive compounds and health benefits of pomegranate,with special attention paid to related mechanisms of action.This narrative review can provide people with an updated knowledge of the health benefits of pomegranate,and also can be helpful for the development of pomegranate into functional food and nutraceuticals.展开更多
基金supported by the National Natural Science Foundation of China(91433202,52103202)National Key Research and Development Program of China(2019YFA0705900)funded by MOST+10 种基金the Basic and Applied Research Major Program of Guangdong Province(2019B030302007)the Shenzhen Science and Technology Innovation Commission(Shenzhen Fundamental Research Program,JCYJ20200109140801751)the Hong Kong Research Grants Council(RIF project R6021-18,CRF project C6023-19G,GRF project 16310019,16310020)Hong Kong Innovation and Technology Commission(ITCCNERC14SC01)and Foshan-HKUST(FSUST19-CAT0202)the support from Ministry of Science and Technology(2016YFA0200700)NSFC(21704082,21875182,21534003)Key Scientific and Technological Innovation Team Project of Shaanxi Province(2020TD-002)China Postdoctoral Science Foundation(2017M623162)111 project 2.0(BP2018008)the financial support from Research Grant Council of Hong Kong(14303519)CUHK Direct Grant(4053415)。
文摘Side-chain engineering has been demonstrated as an effective method for fine-tuning the optical,electrical,and morphological properties of organic semiconductors toward efficient organic solar cells(OSCs).In this work,three isomeric non-fullerene small molecule acceptors(SMAs),named as BTP-4F-T2C8,BTP-4F-T2EH and BTP-4F-T3EH,with linear and branched alkyl chains substituted on the α or β positions of thiophene as the side chains,were synthesized and systematically investigated.The results demonstrate that the size and substitution position of alkyl side chains can greatly affect the electronic properties,molecular packing as well as crystallinity of the SMAs.After blending with donor polymer D18-Cl,the prominent device performance of 18.25% was achieved by the BTP-4F-T3EH-based solar cells,which is higher than those of the BTP-4F-T2EH-based(17.41%)and BTP-4F-T2C8-based(15.92%)ones.The enhanced performance of the BTP-4F-T3EH-based devices is attributed to its stronger crystallinity,higher electron mobility,suppressed bimolecular recombination,and the appropriate intermolecular interaction with the donor polymer.This work reveals that the side chain isomerization strategy can be a practical way in tuning the molecular packing and blend morphology for improving the performance of organic solar cells.
基金funded by the Key Project of Guangdong Provincial Science and Technology Program(No.2014B020205002).
文摘Pomegranate is one of the most popular fruits worldwide,and contains many bioactive compounds,such as punicalagin,ellagic acid,and gallic acid.Pomegranate and its bioactive compounds possess varieties of health benefits,such as antioxidant,anti-inflammatory,and antimicrobial activities,as well as the prevention and treatment of some chronic diseases,including obesity,diabetes mellitus,cardiovascular disease,liver disease,kidney disease,neurodegenerative diseases,and so on.Pomegranate has been widely utilized in the food industry,such as juice and gluten-free cake production,and its extract for extending the shelf life of food.This review paper summarizes the bioactive compounds and health benefits of pomegranate,with special attention paid to related mechanisms of action.This narrative review can provide people with an updated knowledge of the health benefits of pomegranate,and also can be helpful for the development of pomegranate into functional food and nutraceuticals.
