A new kind of dendritic supramolecular complex with porphyrin as a core-centre was prepared based on electrostatic attraction between tetraphenylporphyrinsulfonate anlon and polyether dendritic cations, which was conf...A new kind of dendritic supramolecular complex with porphyrin as a core-centre was prepared based on electrostatic attraction between tetraphenylporphyrinsulfonate anlon and polyether dendritic cations, which was confirmed by 1 H NMR, IR and elementary analysis.展开更多
Fluorene-based polymers containing perfluorooctyl moieties were designed and synthesized. The high electronegativity and F…H--C interactions are present in the fluorinated polymers, which slightly induce blue-shift o...Fluorene-based polymers containing perfluorooctyl moieties were designed and synthesized. The high electronegativity and F…H--C interactions are present in the fluorinated polymers, which slightly induce blue-shift of UV-Vis absorption in film. The fluoropolymer films prepared from fluorinated solvents show lager contact angles than those prepared in non-fluorinated solvents.展开更多
Two kinds of polyfluorenes 19earing two lateral pyrene terminated alkyl chains and two alkyl chains per repeating unit were synthesized by Suzuki polycondensation and used to disperse single-walled carbon nanotubes （...Two kinds of polyfluorenes 19earing two lateral pyrene terminated alkyl chains and two alkyl chains per repeating unit were synthesized by Suzuki polycondensation and used to disperse single-walled carbon nanotubes （SWCNT） in organic solvents. Stable polymer-SWCNT complex can be formed via the multivalent π-π stacking in＂.eraction of the lateral pyrene functional groups and the polyfluorene backbone with the outer surface of carbon nanotubes; meanwhile the lateral alkyl chains can impart good solubility to the complex. As expected, polyfluorenes bearing lateral pyrene functional groups and octyl chains exhibited much higher ,zarbon nanotube solubility in common organic solvents than the corresponding polyfluorenes bearing only octyl chains. Photophysical studies indicated that the formation ofpalymer-SWCNT complex can effectively quench the fluorescence of polyfluorenes.展开更多
6,7-Dialkoxy-2,3-diphenylquinoxaline based narrow band gap conjugated polymers, poly[2,7-（9-octyl-9H- carbazole）-alt-5,5-（5,8-di-2-thinenyl-（6,7-dialkoxy-2,3-diphenylquinoxaline））] （PCDTQ） and poly[2,7-（9,9-d...6,7-Dialkoxy-2,3-diphenylquinoxaline based narrow band gap conjugated polymers, poly[2,7-（9-octyl-9H- carbazole）-alt-5,5-（5,8-di-2-thinenyl-（6,7-dialkoxy-2,3-diphenylquinoxaline））] （PCDTQ） and poly[2,7-（9,9-dioctylfluorene）- alt-5,5-（5,8-di-2-thinenyl-（6,7-dialkoxy-2,3-diphenylquinoxaline））] （PFDTQ）, have been synthesized by Suzuki polycondensation. Their optical, electrochemical, transport and photovoltaic properties have been investigated in detail. Hole mobilities of PCDTQ and PFDTQ films spin coated from 1,2-dichlorobenzene （DCB） solutions are 1.0 X 10-4 and 4.1 X 10-4 cm2 V-1 s-l, respectively. Polymer solar cells were fabricated with the as-synthesized polymers as the donor and PC61BM and PC7 IBM as the acceptor. Devices based on PCDTQ：PC71BM （1：3） and PFDTQ：PC7 IBM （1：3） fabricated from DCB solutions demonstrated a power conversion efficiency （PCE） of 2.5% with a Voc of 0.95 V and a PCE of 2.5% with a Voof 0.98 V, respectively, indicating they are promising donor materials.展开更多
The aggregation and photoinduced excited state dynamics of organic π-conjugated molecules play a vital role in solar energy conversion and applications.This work investigates how solvent polarity affects the aggregat...The aggregation and photoinduced excited state dynamics of organic π-conjugated molecules play a vital role in solar energy conversion and applications.This work investigates how solvent polarity affects the aggregation behavior and the photophysical process of perylene diimide dimer(PDI-II).The results show that the conjugations between PDI intramolecular chromophores are more likely to generate excimer,and the conjugations between PDI intermolecular chromophores are more likely to experience symmetry-breaking charge separation.Our study can provide a reference for the design of high-efficiency solar energy conversion materials.展开更多
文摘A new kind of dendritic supramolecular complex with porphyrin as a core-centre was prepared based on electrostatic attraction between tetraphenylporphyrinsulfonate anlon and polyether dendritic cations, which was confirmed by 1 H NMR, IR and elementary analysis.
基金financially supported by the NSF of China(Nos.20834006 and 50821062)the National Basic Research Program of China(973 Program:2009CB623601)
文摘Fluorene-based polymers containing perfluorooctyl moieties were designed and synthesized. The high electronegativity and F…H--C interactions are present in the fluorinated polymers, which slightly induce blue-shift of UV-Vis absorption in film. The fluoropolymer films prepared from fluorinated solvents show lager contact angles than those prepared in non-fluorinated solvents.
基金financially supported by the NSF of China(Nos.20834006 and 50821062)the National Basic Research Program of China(973 Program:2009CB623601)
文摘Two kinds of polyfluorenes 19earing two lateral pyrene terminated alkyl chains and two alkyl chains per repeating unit were synthesized by Suzuki polycondensation and used to disperse single-walled carbon nanotubes （SWCNT） in organic solvents. Stable polymer-SWCNT complex can be formed via the multivalent π-π stacking in＂.eraction of the lateral pyrene functional groups and the polyfluorene backbone with the outer surface of carbon nanotubes; meanwhile the lateral alkyl chains can impart good solubility to the complex. As expected, polyfluorenes bearing lateral pyrene functional groups and octyl chains exhibited much higher ,zarbon nanotube solubility in common organic solvents than the corresponding polyfluorenes bearing only octyl chains. Photophysical studies indicated that the formation ofpalymer-SWCNT complex can effectively quench the fluorescence of polyfluorenes.
基金supported by the 973 Programs (2011CB935702 and 2009CB623603)the NSF of China(Nos. 20834006, 51003006 and 21161160443)the Fundamental Research Funds for the Central Universities
文摘6,7-Dialkoxy-2,3-diphenylquinoxaline based narrow band gap conjugated polymers, poly[2,7-（9-octyl-9H- carbazole）-alt-5,5-（5,8-di-2-thinenyl-（6,7-dialkoxy-2,3-diphenylquinoxaline））] （PCDTQ） and poly[2,7-（9,9-dioctylfluorene）- alt-5,5-（5,8-di-2-thinenyl-（6,7-dialkoxy-2,3-diphenylquinoxaline））] （PFDTQ）, have been synthesized by Suzuki polycondensation. Their optical, electrochemical, transport and photovoltaic properties have been investigated in detail. Hole mobilities of PCDTQ and PFDTQ films spin coated from 1,2-dichlorobenzene （DCB） solutions are 1.0 X 10-4 and 4.1 X 10-4 cm2 V-1 s-l, respectively. Polymer solar cells were fabricated with the as-synthesized polymers as the donor and PC61BM and PC7 IBM as the acceptor. Devices based on PCDTQ：PC71BM （1：3） and PFDTQ：PC7 IBM （1：3） fabricated from DCB solutions demonstrated a power conversion efficiency （PCE） of 2.5% with a Voc of 0.95 V and a PCE of 2.5% with a Voof 0.98 V, respectively, indicating they are promising donor materials.
基金supported by the National Natural Science Foundation of China(No.U2032112).
文摘The aggregation and photoinduced excited state dynamics of organic π-conjugated molecules play a vital role in solar energy conversion and applications.This work investigates how solvent polarity affects the aggregation behavior and the photophysical process of perylene diimide dimer(PDI-II).The results show that the conjugations between PDI intramolecular chromophores are more likely to generate excimer,and the conjugations between PDI intermolecular chromophores are more likely to experience symmetry-breaking charge separation.Our study can provide a reference for the design of high-efficiency solar energy conversion materials.
基金supported by the National Natural Science Foundation of China(91233205,21161160443,21534003 and 51273020)Program for Changjiang Scholars and Innovative Research Team in Universitythe Fundamental Research Funds for the Central Universities
