Solar-driven interfacial evaporation is a promising technology for desalination.The photothermal conversion materials are at the core and play a key role in thisfield.Design of photothermal conversion materials based o...Solar-driven interfacial evaporation is a promising technology for desalination.The photothermal conversion materials are at the core and play a key role in thisfield.Design of photothermal conversion materials based on organic dyes for desalina-tion is still a challenge due to lack of efficient guiding strategy.Herein,a new D(donor)-A(acceptor)type conjugated tetraphenylpyrazine(TPP)luminophore(namely TPP-2IND)was prepared as a photothermal conversion molecule.It exhib-ited a broad absorption spectrum and strongπ–πstacking in the solid state,resulting in efficient sunlight harvesting and boosting nonradiative decay.TPP-2IND powder exhibited high photothermal efficiency upon 660 nm laser irradiation(0.9 W cm-2),and the surface temperature can reach to 200◦C.Then,an interfacial heating system based on TPP-2IND is established successfully.The water evaporation rate and the solar-driven water evaporation efficiency were evaluated up to 1.04 kg m-2 h-1 and 65.8%under 1 sunlight,respectively.Thus,this novel solar-driven heating system shows high potential for desalination and stimulates the development of advanced photothermal conversion materials.展开更多
Planarized intramolecular charge transfer(PLICT)state can facilitate the fluorescence process thanks to the relative excellent planarity.Recently,we have discovered that the excited state quinone-conformation induced ...Planarized intramolecular charge transfer(PLICT)state can facilitate the fluorescence process thanks to the relative excellent planarity.Recently,we have discovered that the excited state quinone-conformation induced planarization(ESQIP)occurring on tetraphenylpyrazine(TPP)based derivatives could furnish them with PLICT feature.Unlike to the well-known intramolecular charge transfer,strengthening the electron-donating nature on the donor(D)moiety did not impair the PLICT.The calculation results showed that planarization of the TPP based compounds scarcely accompanied with energy wastage while amount of energy was required for the torsion on geometries.In the polar solvents,the energy consumption for planarization could further decrease,but that for twisting structure would increase.To take advantage of the transformation of the frontier orbitals'distribution,the PLICT type materials would perform a potential application on organic light-emitting diodes(OLEDs).展开更多
基金National Natural Science Foundation of China,Grant/Award Numbers:52173152,21805002The Fund of the Rising Stars of Shaanxi Province,Grant/Award Number:2021KJXX-48+5 种基金The Natural Science Basic Research Plan in Shaanxi Province of China,Grant/Award Number:2023-JC-QN-0163Young Talent Fund of University Association for Science and Technology in Shaanxi,China,Grant/Award Numbers:20190610,20210606Research Foundation of Education Department of Shaanxi Province,Grant/Award Number:21JK0487Scientific and Technological Innovation Team of Shaanxi Province,Grant/Award Number:2022TD-36Basic and Applied Basic Research Foundation of Guangdong Province,Grant/Award Number:2020A1515110476College Students’Innovative Entrepreneurial Training Plan Program of Baoji University of Arts and Sciences,Grant/Award Number:S202210721040。
文摘Solar-driven interfacial evaporation is a promising technology for desalination.The photothermal conversion materials are at the core and play a key role in thisfield.Design of photothermal conversion materials based on organic dyes for desalina-tion is still a challenge due to lack of efficient guiding strategy.Herein,a new D(donor)-A(acceptor)type conjugated tetraphenylpyrazine(TPP)luminophore(namely TPP-2IND)was prepared as a photothermal conversion molecule.It exhib-ited a broad absorption spectrum and strongπ–πstacking in the solid state,resulting in efficient sunlight harvesting and boosting nonradiative decay.TPP-2IND powder exhibited high photothermal efficiency upon 660 nm laser irradiation(0.9 W cm-2),and the surface temperature can reach to 200◦C.Then,an interfacial heating system based on TPP-2IND is established successfully.The water evaporation rate and the solar-driven water evaporation efficiency were evaluated up to 1.04 kg m-2 h-1 and 65.8%under 1 sunlight,respectively.Thus,this novel solar-driven heating system shows high potential for desalination and stimulates the development of advanced photothermal conversion materials.
基金Supported by the National Natural Science Foundation of China(Nos.21788102,51673118,21975077)the Science&Technology Program of Guangzhou Province,China(Nos.201804010218,201804020027)+2 种基金the Project of the Innovation and Technology Commission of Hong Kong,China(No.ITC-CNERC14S01)the Fundamental Research Funds for the Central Universities,China(No.2019ZD04)the Fund of Key Laboratory of Luminescence from Molecular Aggregates of Guangdong Province,China(No.2019B030301003).
文摘Planarized intramolecular charge transfer(PLICT)state can facilitate the fluorescence process thanks to the relative excellent planarity.Recently,we have discovered that the excited state quinone-conformation induced planarization(ESQIP)occurring on tetraphenylpyrazine(TPP)based derivatives could furnish them with PLICT feature.Unlike to the well-known intramolecular charge transfer,strengthening the electron-donating nature on the donor(D)moiety did not impair the PLICT.The calculation results showed that planarization of the TPP based compounds scarcely accompanied with energy wastage while amount of energy was required for the torsion on geometries.In the polar solvents,the energy consumption for planarization could further decrease,but that for twisting structure would increase.To take advantage of the transformation of the frontier orbitals'distribution,the PLICT type materials would perform a potential application on organic light-emitting diodes(OLEDs).
