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Science China Chemistry 2024年第3期67卷 1000-1007页

作者： kun Wu pei-Wen Cheng Xin-Yi Liu Ji Zheng Xiao-Wei Zhu Mo Xie Puxin weng Weigang Lu Dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 510632China Guangdong Rare Earth Photofunctional Materials Engineering Technology Research Center School of Chemistry and EnvironmentJiaying UniversityMeizhou 514015China

Photocatalytic aerobic oxidation reactions are largely governed by the efficiency of charge separation and subsequent reactive oxygen species(ROS) generation. Herein, we report a polarization engineering strategy to promote the charge separation and ROS generation efficiency by substituting the benzene unit with furan/thiophene in porous organic polymers(POPs). Benefiting from the extent of local polarization, the thiophene-containing POP(JNU-218) exhibits the best photocatalytic performance in aerobic oxidation reactions, with a yield much higher than those for the furan-containing POP(JNU-217) and the benzenecontaining POP(JNU-216). Experimental studies and theoretical calculations reveal that the increase of local polarization can indeed reduce the exciton binding energy, and therefore facilitate the separation of electron-hole pairs. This work demonstrates a viable strategy to tune charge separation and ROS generation efficiency by modulating the dipole moments of the building blocks in porous polymeric organic semiconductors.

关键词： porous organic polymer local polarization photocatalytic aerobic oxidation charge separation reactive oxygen species exciton binding energy

Quadrupole Moment of the h_(11/2) Quasineutron Band in ^(129)Ce

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Chinese Physics Letters 1998年第8期15卷 564-565页

作者： LI Guang-sheng DAI Zheng-yu LIU Xiang-an ZHANG Lan-kuan WEN Shu-xian WU Xiao-guang YUAN Guan-jun weng pei-kun LI Sheng-gang YANG Chun-xiang China Institute of Atomic Energy Beijing 102413

Mean lifetimes of the h_(11/2) quasineutron band in 129Ce were measured by using the Doppler shift attenuation method in connection with the reaction ^(116)Sn(^(l6)O,3n)^(129)Ce at a bombarding energy of *** data indicate that transition quadrupole moment of ^(129)Ce is smaller than that of *** reduction in collectivity caused by the addition of an h_(11/2) neutron can be interpreted as due to triaxiality induced byγdriving effect.

关键词： effect. addition

Collective Behavior of Negative Parity States in ^(126)Ba at High Spin

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Chinese Physics Letters 1998年第3期15卷 168-169页

作者： LI Guang-sheng DAI Zheng-yu LIU Xiang-an ZHANG Lan-kuan WEN Shu-xian WU Xiao-guang YUAN Guan-jun weng pei-kun LI Sheng-gang YANG Chun-xiang China Institute of Atomic Energy Beijing 102413

Lifetimes of the high spin states in the negative parity band of ^(126)Ba were measured by using the Doppler shift attenuation method in conjunction with the reaction ^(116)Sn(^(16)O,2p4n)^(126) Ba at a beam energy of 73 *** band shows a typically collective behavior and possesses a near-axial prolate shape with a deformation parameter β_(2)=0.27±0.01 and triaxiality γ~-5°.

关键词： collective typically

Lateral photovoltaic effect in the Ni-SiO_(2)-Si structure with bias

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Optoelectronics Letters 2024年第5期20卷 257-264页

作者： LING Xiang ZHU Pengfei ZHU kun SONG pei LI Xiong School of Mathematics Physics and StatisticsShanghai University of Engineering ScienceShanghai 201600China School of Electrical Engineering Liupanshui Normal UniversityLiupanshui 553004China School of Railway Telecommunication Hunan Technical College of Railway High-speedHengyang 421002China

We designed a clamping device to study lateral photovoltaic effect (LPE) in Ni-SiO_(2)-Si structure with bias due to the appropriate barrier *** LPE has a prominent sensitivity and linearity with 532 nm wavelength *** transient response time is 450μs and the relaxation time is 2 250μs in the Ni-SiO_(2)-Si structure without *** LPE sensitivity has a significant improvement with *** transient response time is 6μs and the relaxion time is 47μs with-7 V bias,not only improving the LPE sensitivity,but also increasing the response speed with *** research shows that the Schottky barrier structure can improve the sensitivity and linearity of LPE with bias effectively,and thus it can be used in position sensitive sensors.

关键词： LPE structure effect

High Spin States and Signature Inversion in ^(84)Rb

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Chinese Physics Letters 1999年第7期16卷 487-489页

作者： HAN Guang-bing WEN Shu-xian WU Xiao-guang LIU Xiang-an LI Guang-sheng YUAN Guan-jun PENG Zhao-hua weng pei-kun YANG Chun-xiang MA Ying-jun LU Jing-bin China Institute of Atomic Energy Beijing 102413 Department of Physics Jilin UniversityChangchun 130023

High-spin states in^(84)Rb have been studied by using the^(70)Zn(^(18)O,p3n)^(84)Rb reaction at a beam energy of 75 ***γ-γcoincidence,excitation function and ratios for directional correlation of oriented states were performed.A new level scheme was established in which the positive and negative parity bands have been extended up to 17^(+)and 17^(-)with excitation energy about *** signature splitting and signature inversion of the positive parity yrast bands were observed and are discussed.

关键词： excitation bands signature

High-Spin States in the Odd-Proton Nucleus ^(135)pm

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Chinese Physics Letters 2001年第1期18卷 30-32页

作者： weng pei-kun YUAN Guan-Jun ZHANG Zhan-Jun LI Sheng-Gang WEN Shu-Xian LI Guang-Sheng DAI Zheng-Yu YANG Chun-Xiang PENG Zhao-Hua LIU Xiang-An WU Xiao-Guang PU Yun-Wei China Institute of Atomic Energy Beijing 102413

High-spin states in the odd-proton nucleus^(135)pm have been investigated using the^(107)Ag(^(32)S,2p2n)^(135)pm *** rotational bands have been observed in^(135)*** yrast band based on a decoupled h_(11/2)proton is found to have a band crossing in ω_(c)~0.43 MeV/*** positive-parity bands based on the two signature components of the πg_(7/2)5/2^(+)[413]Nilsson orbital have been observed in the main *** favoured band with(π,α)=(+,1/2)has been shown to populate below the first pair of proton *** bands have shown upbend at ω_(1)~0.26 MeV/h and ω_(2)~0.43 MeV/*** crossing frequencies can be attributed to the decoupling of the first pair of h_(11/2) quasi-proton and h_(11/2) quasi-neutron,*** weaker bands have been observed in sidebands *** them,two states are possibly built on aπd_(5)/23/2^(+)[411]configuration.

关键词： reaction bands

Lymph node dissection does not affect the survival of patients with tumor node metastasis stages I and II colorectal cancer

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2503-2510页

作者： Fan He Shu-pei Qu Ye Yuan kun Qian Department of Gastrointestinal Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

BACKGROUND The effect of the number of lymph node dissections(LNDs)during radical resection for colorectal cancer(CRC)on overall survival(OS)remains *** To investigate the association between the number of LNDs and OS in patients with tumor node metastasis(TNM)stage I–II CRC undergoing radical *** Patients who underwent radical resection for CRC at a single-center hospital between January 2011 and December 2021 were retrospectively *** regression analyses were performed to identify the independent predictors of OS at different T *** A total of 2850 patients who underwent laparoscopic radical resection for CRC were *** stage T1,age[P<0.01,hazard ratio(HR)=1.075,95%confidence interval(CI):1.019-1.134]and tumour size(P=0.021,HR=3.635,95%CI:1.210-10.917)were independent risk factors for *** stage T2,age(P<0.01,HR=1.064,95%CI:1.032-1.098)and overall complications(P=0.012,HR=2.297,95%CI:1.200-4.397)were independent risk factors for *** stage T3,only age(P<0.01,HR=1.047,95%CI:1.027-1.066)was an independent risk factor for *** stage T4,age(P<0.01,HR=1.057,95%CI:1.039-1.075)and body mass index(P=0.034,HR=0.941,95%CI:0.890-0.995)were independent risk factors for ***,there was no association between LNDs and OS in stages I and *** The number of LDNs did not affect the survival of patients with TNM stages I and II ***,insufficient LNDs should not be a cause for alarm during the surgery.

关键词： Lymph nodes Colorectal cancer T stage Overall survival Cox regression analyses

Exploration of the Existence Forms and Patterns of Dissolved Oxygen Molecules in Water

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Nano-Micro Letters 2024年第10期16卷 337-349页

作者： Hewei Yuan Yaozhong Zhang Xiaolu Huang Xiwu Zhang Jinjin Li Yufeng Huang kun Li Haotian weng Yang Xu Yafei Zhang Key Laboratory of Thin Film and Microfabrication(Ministry of Education) Department of Micro/Nano ElectronicsSchool of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240People's Republic of China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240People's Republic of China Jinduo Yuchen Water Environment Engineering Co. LtdShanghai 201702People's Republic of China

The structure of liquid water is primarily composed of three-dimensional networks of water clusters formed by hydrogen bonds,and dis-solved oxygen is one of the most important indicators for assessing water *** this work,distilled water with different concentration of dissolved oxygen were prepared,and a clear negative correlation between the size of water clus-ters and dissolved oxygen concentration was ***,a phenomenon of rapid absorption and release of oxygen at the water interfaces was unveiled,suggesting that oxygen molecules predominantly exist at the interfaces of water *** molecules can move rapidly through the interfaces among water clusters,allowing dissolved oxygen to quickly reach a saturation level at certain partial pressure of oxygen and *** exploration into the mechanism by molecular dynamics simulations of oxygen and water clusters found that oxygen molecules can only exist stably at the interfaces among water clusters.A semi-empirical formula relating the average number of water molecules in a cluster(n)to ^(17)O NMR half-peak width(W)was summarized:n=0.1 W+*** findings provide a foundation for exploring the structure and properties of water.

关键词： Water clusters Dissolved oxygen ^(17)O NMR Molecular dynamics simulation

Rare earth element-modified MOF materials:synthesis and photocatalytic applications in environmental remediation

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Rare Metals 2024年第4期43卷 1390-1406页

作者： Shu-kun Le Qi-Jie Jin Jia-Ao Han Hua-Cong Zhou Quan-Sheng Liu Fu Yang Jie Miao pei-pei Liu Cheng-Zhang Zhu Hai-Tao Xu Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resources Chemical Engineering CollegeInner Mongolia University of TechnologyHohhot010050China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing210009China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang212100China Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications MontrealQCJ3X 1P7Canada

Metal-organic framework-like materials(MOFs)have been developed in the fields of photocatalysis for their excellent optical properties and physicochemical properties,including environmental remediation,CO_(2)photoreduction,water splitting,and so *** their important roles in various fields,rare earth elements have received growing interests from *** MOFs with rare earth elements for modification allows broadening the absorption spectrum,while the active electrons on their empty 4f orbitals can act as traps to capture photoexcited carriers to inhibit the recombination of electron-hole pairs,thus promoting photocatalytic ***,rare earth elements modified MOFs provide an attractive way to achieve their high value *** this mini-review,the synthesis of rare earth element-modified MOFs photocatalysts and corresponding applications in the removal of antibiotics,CO_(2)reduction,and hydrogen production are constructively summarized and ***,the latest advancements and current difficulties of these materials as well as the application prospects are also provided.

关键词： Rare earth metals MOFs Photocatalytic CO_(2) reduction Environmental remediation Water splitting

Superdeformed Bands in ^(167)Lu and ^(171)Ta

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Chinese Physics Letters 1997年第1期14卷 17-19页

作者： WU Xiao-guang YANG Chun-xiang ZHENG Hua LIU Xiang-an SHEN Cai-wan CHEN Yong-shou MA Ying-jun LU Jing-bin WEN Shu-xian LI Guang-sheng LI Sheng-gang YUAN Guan-jun weng pei-kun LIU Yun-zuo China Institute of Atomic Energy Beijing 102413 Department of Physics Jilin UniversityChangchun 130023

High spin states of the odd-proton nucleus ^(167)Lu have been studied via ^(152)Sm(^(19)F,4n)^(167)Lu reaction at 87MeV beam energy.A weakly populated new rotationa1 band has been observed and assigned as i13/2 proton 1/2^(+)[660] *** new band and the 1/2^(+)[660] band in ^(171)Ta from the early work are classified as superdeformed bands with triaxiality.

关键词： energy. weakly