We designed and prepared a hetero-dimensional hybrid （HDH） based on molybdenum selenide （MoSe2） nanodots （NDs） anchored in few-layer MoSe2 nanosheets （NSs） （MoSe2 HDH） via a one-pot hydrothermal process. The...We designed and prepared a hetero-dimensional hybrid （HDH） based on molybdenum selenide （MoSe2） nanodots （NDs） anchored in few-layer MoSe2 nanosheets （NSs） （MoSe2 HDH） via a one-pot hydrothermal process. The MoSe2 HDH exhibits excellent electrocatalytic activity toward hydrogen evolution reaction （HER）. This is because, on the one hand, the edge-abundant features of MoSe2 NDs and the unique defect-rich structure at the interface of MoSe2 NSs/NDs could bring in more active sites for HER; on the other hand, the random stacking of the flake-like MoSe2 NSs on the surface of the supporting electrode may achieve efficient charge transport. Additionally, the MoSe2 HDH shows good water stability, desirable biocompatibility, and high near infrared （NIR） photothermal conversion efficiency. Therefore, the MoSe2 HDH is investigated as a nanomedicine in NIR photothermal therapy （PTT） for cancer. Specifically, the MoSe2 HDH can be applied as a dual-modal probe for computed tomography （CT） and photoacoustic tomography （PA） imaging owing to its strong X-ray attenuation ability and NIR absorption. Therefore, the MoSe2 HDH, combining PTT with CT/PA imaging into one system, holds great potential for imaging-guided cancer theranostics. This work may provide an ingenious strategy to prepare other hetero-dimensional layered transition metal dichalcogenides.展开更多
The molecular-based magnetic complex {[Cu (1, 3-Pn )]2 [Fe (CN)6] (OH).3H2O }n, where 1, 3-Pn is 1, 3-diaminopropane, has been prepared and characterized by X-raycrystallography. It crystallizes in the monoclinic syst...The molecular-based magnetic complex {[Cu (1, 3-Pn )]2 [Fe (CN)6] (OH).3H2O }n, where 1, 3-Pn is 1, 3-diaminopropane, has been prepared and characterized by X-raycrystallography. It crystallizes in the monoclinic system, space group P21 /n, with a =0. 757 7(3) nm, b=1. 069 8(1) nm, c=1. 300 0(2) nm, β=90. O5°, V=1. 053 8(5) nm3,and Z =4. The result of the crystallography indicates that this complex has a three-dimen-sional structure.展开更多
Recent noteworthy developments in the field of two-dimensional（2D） correlation spectroscopy are reviewed.2D correlation spectroscopy has become a very popular tool due to its versatility and relative ease of use.The...Recent noteworthy developments in the field of two-dimensional（2D） correlation spectroscopy are reviewed.2D correlation spectroscopy has become a very popular tool due to its versatility and relative ease of use.The technique utilizes a spectroscopic or other analytical probe from a number of selections for a broad range of sample systems by employing different types of external perturbations to induce systematic variations in intensities of spectra.Such spectral intensity variations are then converted into2 D spectra by a form of correlation analysis for subsequent interpretation.Many different types of 2D correlation approaches have been proposed.In particular,2D hetero-correlation and multiple perturbation correlation analyses,including orthogonal sample design scheme,are discussed in this review.Additional references to other important developments in the field of 2D correlation spectroscopy,such as projection correlation and codistribution analysis,were also provided.展开更多
A series of two-dimensional(2D)conjugated copolymers with spatial D-A-D structures(PTNBTB,PTCBTB,and PTSBTB)consisting of hetero-atom-bridged dithiophene and phenylvinyl-substituted benzothiadiazole blocks in the main...A series of two-dimensional(2D)conjugated copolymers with spatial D-A-D structures(PTNBTB,PTCBTB,and PTSBTB)consisting of hetero-atom-bridged dithiophene and phenylvinyl-substituted benzothiadiazole blocks in the main chain have been designed,synthesized,and characterized.The structure-property relationships of the resulting copolymers were systematically investigated.The effects of the bridging atoms(N,C,and Si)on their thermal,optical,electrochemical and chargetransporting properties were also studied.PTNBTB exhibits a smaller band gap with red-shifted absorption,whereas PTSBTB possesses deeper HOMO level and higher hole mobility than PTCBTB or PTSBTB.Bulk heterojunction(BHJ)solar cells were fabricated and characterized with the conventional configuration of ITO/PEDOT:PSS/copolymer:PC71BM(1:1)/Ca/Al.As expected,PTSBTB devices showed the highest PCE,up to 4.01%,which was due to the lower HOMO level,higher carrier mobility,and stronger optical response as well as the finer nanoscale phase separation of the pristine polymer and/or the corresponding blending active layer with PC71BM.The primary results offer useful insights in designing 2D copolymers with spatial D-A-D backbone and different hetero-atom bridged donor units to finely tune the absorptions,electronic energy levels,carrier mobilities and the photovoltaic properties.展开更多
基金This work was financially supported by the National Natural Science Foundation of China （Nos. 21601014, 21471016, and 21271023） and the 111 Project （No. B07012）. This work was also financially supported by the Beijing Natural Science Foundation （No. 2162046） and National Basic Research Program of China （No. 2016YFA0201603）. The authors would like to thank the Analysis ＆ Testing Center of Beijing Institute of Technology for performing FESEM and TEM measurements.
文摘We designed and prepared a hetero-dimensional hybrid （HDH） based on molybdenum selenide （MoSe2） nanodots （NDs） anchored in few-layer MoSe2 nanosheets （NSs） （MoSe2 HDH） via a one-pot hydrothermal process. The MoSe2 HDH exhibits excellent electrocatalytic activity toward hydrogen evolution reaction （HER）. This is because, on the one hand, the edge-abundant features of MoSe2 NDs and the unique defect-rich structure at the interface of MoSe2 NSs/NDs could bring in more active sites for HER; on the other hand, the random stacking of the flake-like MoSe2 NSs on the surface of the supporting electrode may achieve efficient charge transport. Additionally, the MoSe2 HDH shows good water stability, desirable biocompatibility, and high near infrared （NIR） photothermal conversion efficiency. Therefore, the MoSe2 HDH is investigated as a nanomedicine in NIR photothermal therapy （PTT） for cancer. Specifically, the MoSe2 HDH can be applied as a dual-modal probe for computed tomography （CT） and photoacoustic tomography （PA） imaging owing to its strong X-ray attenuation ability and NIR absorption. Therefore, the MoSe2 HDH, combining PTT with CT/PA imaging into one system, holds great potential for imaging-guided cancer theranostics. This work may provide an ingenious strategy to prepare other hetero-dimensional layered transition metal dichalcogenides.
文摘The molecular-based magnetic complex {[Cu (1, 3-Pn )]2 [Fe (CN)6] (OH).3H2O }n, where 1, 3-Pn is 1, 3-diaminopropane, has been prepared and characterized by X-raycrystallography. It crystallizes in the monoclinic system, space group P21 /n, with a =0. 757 7(3) nm, b=1. 069 8(1) nm, c=1. 300 0(2) nm, β=90. O5°, V=1. 053 8(5) nm3,and Z =4. The result of the crystallography indicates that this complex has a three-dimen-sional structure.
文摘Recent noteworthy developments in the field of two-dimensional（2D） correlation spectroscopy are reviewed.2D correlation spectroscopy has become a very popular tool due to its versatility and relative ease of use.The technique utilizes a spectroscopic or other analytical probe from a number of selections for a broad range of sample systems by employing different types of external perturbations to induce systematic variations in intensities of spectra.Such spectral intensity variations are then converted into2 D spectra by a form of correlation analysis for subsequent interpretation.Many different types of 2D correlation approaches have been proposed.In particular,2D hetero-correlation and multiple perturbation correlation analyses,including orthogonal sample design scheme,are discussed in this review.Additional references to other important developments in the field of 2D correlation spectroscopy,such as projection correlation and codistribution analysis,were also provided.
基金supported by the National Natural Science Foundation of China(20802033,21272164)the National High-Tech R&D Program of China(2013AA031901)+1 种基金the Youth Science and Technology Foundation of Sichuan Province(2013JQ0032)the Fundamental Research Funds for the Central Universities(2012SCU04B01,YJ2011025)
文摘A series of two-dimensional(2D)conjugated copolymers with spatial D-A-D structures(PTNBTB,PTCBTB,and PTSBTB)consisting of hetero-atom-bridged dithiophene and phenylvinyl-substituted benzothiadiazole blocks in the main chain have been designed,synthesized,and characterized.The structure-property relationships of the resulting copolymers were systematically investigated.The effects of the bridging atoms(N,C,and Si)on their thermal,optical,electrochemical and chargetransporting properties were also studied.PTNBTB exhibits a smaller band gap with red-shifted absorption,whereas PTSBTB possesses deeper HOMO level and higher hole mobility than PTCBTB or PTSBTB.Bulk heterojunction(BHJ)solar cells were fabricated and characterized with the conventional configuration of ITO/PEDOT:PSS/copolymer:PC71BM(1:1)/Ca/Al.As expected,PTSBTB devices showed the highest PCE,up to 4.01%,which was due to the lower HOMO level,higher carrier mobility,and stronger optical response as well as the finer nanoscale phase separation of the pristine polymer and/or the corresponding blending active layer with PC71BM.The primary results offer useful insights in designing 2D copolymers with spatial D-A-D backbone and different hetero-atom bridged donor units to finely tune the absorptions,electronic energy levels,carrier mobilities and the photovoltaic properties.
