The fall armyworm(FAW,Lepidoptera:Noctuidae),Spodoptera frugiperda(J.E.Smith),invaded China in mid-December 2018;since then,it has become a great threat to Chinese agricultural production.Qinling Mountains-Huaihe Rive...The fall armyworm(FAW,Lepidoptera:Noctuidae),Spodoptera frugiperda(J.E.Smith),invaded China in mid-December 2018;since then,it has become a great threat to Chinese agricultural production.Qinling Mountains-Huaihe River region(QM-HRR)is the transitional zone between northern and southern China,an important region for both corn and wheat production.Based on the actual occurrence of QM-HRR invaded by FAW in 2019,daily mean surface air temperature and nocturnal wind conditions at 925 hPa were examined,and migratory routes of FAW moths originated in QM-HRR were modeled by a forward-trajectory-analysis approach.The results indicated that migratory activities of FAW adults emerged in QM-HRR were initiated from late June.The moths from western QM-HRR,where has complex topographic terrain,mainly flied to Ningxia and Inner Mongolia before mid September.However,FAW moths from the eastern QM-HRR primarily engaged in high-altitude northward transport assisted by the prevailing southerly winds before mid August,and the North China Plain was identified as the main destination of FAW.Meanwhile,the migration trajectories of FAW moths had a possibility to reach the Northeast China Plain.From mid August,FAW moths in eastern QM-HRR largely migrated southward and returned to the Yangtze River Valley.This study provides detailed information on the occurrence and migration routes of FAW moths from QM-HRR and will be helpful for early warning and development of integrated pest management strategies for the control of this exotic insect pest.展开更多
Designing stable molecules with efficient near-infrared(NIR) photothermal/photoacoustic performances is important for biological and environmental applications.In this article,we inserted paramagnetic Cu(Ⅱ) into tetr...Designing stable molecules with efficient near-infrared(NIR) photothermal/photoacoustic performances is important for biological and environmental applications.In this article,we inserted paramagnetic Cu(Ⅱ) into tetraanthraporphyrin to generate a highly photostable molecule,Cu ANP,which demonstrated a sharp,intense Q band in the NIR region above 800 nm.Unlike its diamagnetic Zn(Ⅱ)-coordinated analog Zn ANP that degraded rapidly under ambient light,Cu ANP has a low-lying singly unoccupied d orbital that quenched radioactive emission and reactive oxygen generation effectively,resulting in fast photothermal response,excellent photothermal conversion capacity and heat endurance under long-term laser irradiation in an organic solvent,in water after encapsulation as a nanocomposite,and in the solid state.Cu ANP also exhibited an intense NIR photoacoustic response and was reversibly redox-active,displaying a broad band spreading to the NIR-Ⅱ window(700–1,300 nm) in the dicationic state.This paramagnetic metal incorporation strategy can enhance the performance of photolabile NIR absorbing molecules for a variety of photothermal/photoacoustic applications.展开更多
Materials with facilely tunable spin configurations based on metal-radical coordination systems have potential applications for electronics and spintronics.Here,we report the ground state conversion of copper corrole ...Materials with facilely tunable spin configurations based on metal-radical coordination systems have potential applications for electronics and spintronics.Here,we report the ground state conversion of copper corrole radicals from singlet to triplet via the extension of theπ-conjugation system by benzo-fusion at theβ-position of corrole ligand.NMR spectroscopy,SQUID measurements and computational studies all support the ferromagnetic coupling between the Cu(II)center and corroleπ-radical of benzo-fused copper corrole 2-Cu,which is in sharp contrast with the antiferromagnetic coupling in regular non-extended copper corroles.The triplet 2-Cu is highly stable in air,and X-ray diffraction analysis revealed its unique highly planar corrole macrocycle.This work offers a promising strategy for creating high-spin systems in non-innocent metallocorroles.展开更多
基金supported by the National Natural Science Foundation of China(31901873 and 31727901)the China Postdoctoral Science Foundation(2019M660896)+1 种基金the Central Public-interest Scientific Institution Basal Research Fund,China(CAAS-ZDRW202007)the National Key R&D Program of China(2019YFD0300105)。
文摘The fall armyworm(FAW,Lepidoptera:Noctuidae),Spodoptera frugiperda(J.E.Smith),invaded China in mid-December 2018;since then,it has become a great threat to Chinese agricultural production.Qinling Mountains-Huaihe River region(QM-HRR)is the transitional zone between northern and southern China,an important region for both corn and wheat production.Based on the actual occurrence of QM-HRR invaded by FAW in 2019,daily mean surface air temperature and nocturnal wind conditions at 925 hPa were examined,and migratory routes of FAW moths originated in QM-HRR were modeled by a forward-trajectory-analysis approach.The results indicated that migratory activities of FAW adults emerged in QM-HRR were initiated from late June.The moths from western QM-HRR,where has complex topographic terrain,mainly flied to Ningxia and Inner Mongolia before mid September.However,FAW moths from the eastern QM-HRR primarily engaged in high-altitude northward transport assisted by the prevailing southerly winds before mid August,and the North China Plain was identified as the main destination of FAW.Meanwhile,the migration trajectories of FAW moths had a possibility to reach the Northeast China Plain.From mid August,FAW moths in eastern QM-HRR largely migrated southward and returned to the Yangtze River Valley.This study provides detailed information on the occurrence and migration routes of FAW moths from QM-HRR and will be helpful for early warning and development of integrated pest management strategies for the control of this exotic insect pest.
基金supported by the National Natural Science Foundation of China(22071103,21911540069 to Z.S.and22001119 to F.W.)。
文摘Designing stable molecules with efficient near-infrared(NIR) photothermal/photoacoustic performances is important for biological and environmental applications.In this article,we inserted paramagnetic Cu(Ⅱ) into tetraanthraporphyrin to generate a highly photostable molecule,Cu ANP,which demonstrated a sharp,intense Q band in the NIR region above 800 nm.Unlike its diamagnetic Zn(Ⅱ)-coordinated analog Zn ANP that degraded rapidly under ambient light,Cu ANP has a low-lying singly unoccupied d orbital that quenched radioactive emission and reactive oxygen generation effectively,resulting in fast photothermal response,excellent photothermal conversion capacity and heat endurance under long-term laser irradiation in an organic solvent,in water after encapsulation as a nanocomposite,and in the solid state.Cu ANP also exhibited an intense NIR photoacoustic response and was reversibly redox-active,displaying a broad band spreading to the NIR-Ⅱ window(700–1,300 nm) in the dicationic state.This paramagnetic metal incorporation strategy can enhance the performance of photolabile NIR absorbing molecules for a variety of photothermal/photoacoustic applications.
基金supported by the National Natural Science Foundation of China(Nos.22071103,22001119 and 21911540069)the Program A for Outstanding PhD Candidate of Nanjing University(No.202201A006).
文摘Materials with facilely tunable spin configurations based on metal-radical coordination systems have potential applications for electronics and spintronics.Here,we report the ground state conversion of copper corrole radicals from singlet to triplet via the extension of theπ-conjugation system by benzo-fusion at theβ-position of corrole ligand.NMR spectroscopy,SQUID measurements and computational studies all support the ferromagnetic coupling between the Cu(II)center and corroleπ-radical of benzo-fused copper corrole 2-Cu,which is in sharp contrast with the antiferromagnetic coupling in regular non-extended copper corroles.The triplet 2-Cu is highly stable in air,and X-ray diffraction analysis revealed its unique highly planar corrole macrocycle.This work offers a promising strategy for creating high-spin systems in non-innocent metallocorroles.
