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Spin-modulated near-infrared-Ⅰ emission in a xanthene-decorated Fe(Ⅱ) spin-crossover complex

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Science China Chemistry 2025年

作者： Cheng yi Duyong Chen Shihui zhang Rui Cai Chunying Duan yinshan Meng Tao Liu State Key Laboratory of Fine Chemicals Frontier Science Center for Smart Materials and Chemical Engineering School of Chemical Engineering Dalian University of Technology Instrumental Analysis Center Dalian University of Technology School of Chemistry Dalian University of Technology Liaoning Binhai Laboratory

Molecular materials showing synergetic coupling of near-infrared （NIR） fluorescence and spin-crossover （SCO） are promisingly applicable in in-vivo bioimaging,temperature sensing,and spintronic *** the related study faces formidable *** this work we graft the NIR fluorophore xanthene onto the dipyridyl substituted triazole ligand and construct a new Febased SCO material,{FeⅡ（ddxc-abpt）2[N（CN）2]2}(1,ddxc-abpt:（E）-4-(((3,5-di（pyridin-2-yl）-4H-1,2,4-triazol-4-yl)imino)methyl)-N,N-diethyl-2,3-dihydro-1H-xanthen-6-amine).Magnetic studies indicate that compound 1 exhibits thermally induced SCO property in both the solid and solution ***-temperature fluorescence emission spectra reveal a remarkable 7-fold increase in photoluminescence intensity upon the transition from the low-spin state at 110 K to the high-spin state at 280 K,which is the record of all reported coupled fluorescence-SCO ***-temperature ultraviolet-visible （UV-Vis）absorption spectra show a significant change in absorption intensity within the fluorescence emission window,consistent with the F?rster resonance energy transfer （FRET） ***-dependent density functional theory （TD-DFT） calculations demonstrate that the strong coupling is attributed to disrupted energy transfer between the xanthene fluorophore and high-spin *** work provides a feasible approach for expanding the synergetic SCO-fluorescence materials to the NIR-Iwavelength region,and hopefully contributes to the applications of tunable NIR-SCO molecule-based sensors and devices.

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Formation and evolution of supercritical geofluid

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Science China Earth Sciences 2025年第1期68卷 39-51页

作者： Huaiwei NI yilin XIAO Xiaolin XIONG Xiandong LIU Chunxiao GAO yi-Xiang CHEN Yunguo LI Wan-Cai LI Xuan GUO Yang-Yang WANG Dong-Bo TAN Li zhang State Key Laboratory of Lithospheric and Environmental Coevolution University of Science and Technology of China Deep Space Exploration Laboratory/School of Earth and Space Sciences University of Science and Technology of China Guangzhou Institute of Geochemistry Chinese Academy of Sciences School of Earth Sciences and Engineering Nanjing University State Key Lab of Superhard Materials Jilin University

In this work, we provide a comprehensive review on the formation, evolution, properties, and effects of supercritical geofluid. In Earth's interior, enhanced miscibility between H2O and silicate by the addition of special components or by the increase of pressure and temperature gives rise to supercritical geofluid with a significant amount of both H2O and silicate *** formation of supercritical geofluid in magmatic-hydrothermal systems, typified by pegmatite system, is governed by meltfluid critical curve. The formation of supercritical geofluid in metamorphic systems, typified by subducted slab, is governed by the second critical end point. Experimental results suggest that the presence of boron and fluorine in pegmatite system makes it possible to form supercritical geofluid at crustal depths, but the release of supercritical geofluid from subducted slab is withheld until almost 100 km depth. A major presence of both H2O and depolymerized structural units（monomers, dimers, etc.） endows supercritical geofluid with unique physical properties including low density, low elastic moduli, low viscosity, high diffusivity,and high electrical conductivity. Supercritical geofluid can effectively mobilize a variety of elements even including high field strength elements and heavy rare earth elements. The chemical signatures of supercritical geofluid can be inherited by metasomatized mantle and mantle-derived melts, and this could give an explanation of the oxidation of arc magmas. Phase separation of supercritical geofluid through the mechanism of spinodal decomposition leads to formation of a melt network. Multiphase fluid inclusions recovered from subduction zone rocks and pegmatites are possible relics of supercritical geofluid. Supercritical geofluid can cause electrical anomaly and low seismic velocity near the top of subducted slab, and can be linked with intermediate-focus earthquakes. Supercritical geofluid may have played a crucial role in the formation of pe

关键词： Supercritical geofluid Miscibility Subduction zone Pegmatite

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Can patients with mild non-neoplastic lesions diagnosed at baseline screening be safely exempt from surveillance: evidence from multicenter community-based cohorts

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Science China Life Sciences 2025年第1期68卷 263-271页

作者： Siyi He Zhiyi zhang Guohui Song Zhenhai Wang Chunyun Dai Shipeng Yan Kun Jiang Bingbing Song He Li Maomao Cao Dianqin Sun Fan Yang Xinxin Yan Shaoli zhang yi Teng Qianru Li Changfa Xia Wanqing Chen Office of Cancer Screening National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College Department of Gastroenterology Gansu Wuwei Tumor Hospital Cixian Cancer Institute Linzhou Cancer Hospital Center for Disease Control and Prevention of Sheyang County Department of Cancer Prevention and Control Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of MedicineCentral South University Luoshan Center for Disease Control and Prevention Office for Cancer Control and Research Affiliated Cancer Hospital of Harbin Medical University

Surveillance recommendations for gastric cancer（GC） in current guidelines focused on advanced precancerous lesions and were based on precise diagnosis of severity/extent of baseline lesions. We aimed to develop a less endoscopy-related equipment-dependent risk-stratification tool, and assessed whether mild-precursor-lesion patients can be safely exempt from surveillance. In the multicenter communitybased cohort, 75,051 participants receiving baseline endoscopy were enrolled during 2015–2017 and followed-up until 2021. Cumulative incidence rates（CIRs） of GC for precancerous-conditions were calculated by Kaplan-Meier method and compared by Log-rank tests. Mixedeffects Cox regression models were used to detect potential factors for progression towards GC. A risk score was calculated as counts of selected factors. An independent cohort, including 26,586 participants was used for external validation. During a median follow-up of 6.25 years, CIRs of GC were 0.302%, 0.436%, and 4.756% for normal group, non-neoplastic（atrophic gastritis/intestinal metaplasia） and neoplastic lesions（low-grade/high-grade dysplasia）, respectively(Ptrendfurther categorizing non-neoplastic lesions by histological grade, both patients with moderate-to-severe lesions（aHR=3.07, 95%CI: 1.67–5.64） and high-risk patients with mild lesions（aHR=7.29, 95%CI: 3.58–14.86） showed higher risks. Consistent trends were observed in validation cohort. High-risk mild-precursor-lesion patients should receive surveillance within 3–5 years after baseline screening. Our study provides evidence on supplementing current guideline recommendations.

关键词： stomach neoplasms precancerous conditions cancer screening cumulative incidence risk stratification

Infiltration by monocytes of the central nervous system and its role in multiple sclerosis: reflections on therapeutic strategies

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Neural Regeneration Research 2025年第3期20卷 779-793页

作者： Guangyong zhang Qing Yao Chubing Long Pengcheng yi Jiali Song Luojia Wu Wei Wan Xiuqin Rao Yue Lin Gen Wei Jun ying fuzhou Hua Department of Anesthesiology the Second Affiliated Hospital of Nanchang UniversityNanchangJiangxi ProvinceChina Key Laboratory of Anesthesiology of Jiangxi Province NanchangJiangxi ProvinceChina

Mononuclear macrophage infiltration in the central nervous system is a prominent feature of neuroinflammation. Recent studies on the pathogenesis and progression of multiple sclerosis have highlighted the multiple roles of mononuclear macrophages in the neuroinflammatory process. Monocytes play a significant role in neuroinflammation, and managing neuroinflammation by manipulating peripheral monocytes stands out as an effective strategy for the treatment of multiple sclerosis, leading to improved patient outcomes. This review outlines the steps involved in the entry of myeloid monocytes into the central nervous system that are targets for effective intervention: the activation of bone marrow hematopoiesis, migration of monocytes in the blood, and penetration of the blood–brain barrier by monocytes. Finally, we summarize the different monocyte subpopulations and their effects on the central nervous system based on phenotypic differences. As activated microglia resemble monocyte-derived macrophages, it is important to accurately identify the role of monocyte-derived macrophages in disease. Depending on the roles played by monocyte-derived macrophages at different stages of the disease, several of these processes can be interrupted to limit neuroinflammation and improve patient prognosis. Here, we discuss possible strategies to target monocytes in neurological diseases, focusing on three key aspects of monocyte infiltration into the central nervous system, to provide new ideas for the treatment of neurodegenerative diseases.

关键词： blood–brain barrier macrophages monocytes multiple sclerosis neuroinflammation review therapy

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70℃干热处理德兰臭草种子内生真菌的研究

草地学报 2016年第6期24卷 1318-1322页

作者：施宠鲁益黄长福张蕊思安沙舟新疆农业大学草业与环境科学学院新疆草地资源与生态重点实验室新疆乌鲁木齐830052

为了更好地研究内生真菌与德兰臭草(Melica transsilvanica)的互作关系,需获得内生真菌种群已失活的德兰臭草种子。本试验采用70℃干热的方法对德兰臭草带菌种子分别处理5d,10d,15d,20d,25d和30d,以不作处理的种子为对照,通过测定各处... 详细信息

为了更好地研究内生真菌与德兰臭草(Melica transsilvanica)的互作关系,需获得内生真菌种群已失活的德兰臭草种子。本试验采用70℃干热的方法对德兰臭草带菌种子分别处理5d,10d,15d,20d,25d和30d,以不作处理的种子为对照,通过测定各处理后种子的萌发指标、生长指标和植株内生真菌数量等综合评价内生真菌的灭活效果。结果表明,70℃干热处理能有效杀灭德兰臭草种子中的内生真菌;70℃处理5d后,与对照相比,宿主染菌率下降为50%;处理25d时,种子和植株中均未分离出内生真菌。同时,70℃处理25d时,种子发芽率、发芽势、发芽指数、植株鲜重和胚根、胚芽长度以及植株株高、叶片数、分蘖数、叶宽和茎粗与对照相比均没有显著影响。值得一提的是,70℃干热处理种子可促进植株须根数的增多和根长的增加。综合比较得出,70°C干热处理25d能使德兰臭草种子中全部内生真菌失活,是一种简单、方便、可行的方法。

关键词：德兰臭草内生真菌高温处理效果评价

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锚钉技术治疗髌骨下极撕脱骨折的疗效分析

中国矫形外科杂志 2017年第8期25卷 700-703页

作者：张如意唐佩福张立海陶笙梁向党郭义柱中国人民解放军总医院骨科北京100853

[目的]评价锚钉技术治疗髌骨下极撕脱粉碎性骨折的疗效。[方法]回顾性分析本院2008年3月~2014年3月收治的髌骨下极撕脱粉碎性骨折患者26例(男19例,女7例),平均年龄(39±11)岁(26~54岁),均采用锚钉技术治疗。术后定期随访,采用膝关节活动... 详细信息

[目的]评价锚钉技术治疗髌骨下极撕脱粉碎性骨折的疗效。[方法]回顾性分析本院2008年3月~2014年3月收治的髌骨下极撕脱粉碎性骨折患者26例(男19例,女7例),平均年龄(39±11)岁(26~54岁),均采用锚钉技术治疗。术后定期随访,采用膝关节活动度(range of motion,ROM)和Bostman评分系统评价膝关节功能康复情况。[结果]26例中23例获得随访,术后平均随访(29±7)个月(19~46个月)。末次随访时,患侧膝关节ROM为(129.35±7.19)°,健侧膝关节ROM为(132.69±6.11)°,两组间差异无统计学意义(P>0.05),Bostman评分平均(28.41±2.13)分,优15例,良7例,差1例,优良率95.65%。[结论]锚钉技术结合张力带技术治疗髌骨下极撕脱粉碎性骨折操作简便,疗效确切,膝关节功能恢复好。

关键词：锚钉技术张力带技术髌骨下极撕脱骨折膝关节康复

烟台四十里湾浅海养殖生物及附着生物的化学组成、有机净生产量及其生态效应

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水产学报 2002年第1期26卷 21-27页

作者：周毅杨红生刘石林何义朝张福绥中国科学院海洋研究所海洋生态与环境科学重点实验室中国科学院海洋研究所海洋生态与环境科学重点实验室山东青岛26

对四十里湾养殖海区一些双壳贝类和藻类收获时的化学组成和有机净生产量进行了分析。不同双壳贝类软体有机碳含量差别不大 ,而N含量差异较大。栉孔扇贝软体N含量最高 (12 .36 % ) ,而牡蛎、毛蚶相对较低 (8%～ 9% )。贻贝和菲律宾蛤仔贝... 详细信息

对四十里湾养殖海区一些双壳贝类和藻类收获时的化学组成和有机净生产量进行了分析。不同双壳贝类软体有机碳含量差别不大 ,而N含量差异较大。栉孔扇贝软体N含量最高 (12 .36 % ) ,而牡蛎、毛蚶相对较低 (8%～ 9% )。贻贝和菲律宾蛤仔贝壳N含量最高 ,分别为 0 .5 5 %和 0 .5 6 % ;而栉孔扇贝贝壳则较低(0 .1% ) ,且贝壳C、N、P在扇贝C、N、P总含量中所占的比例分别为 6 .2 %、7.5 %和 6 .9%。海带和石莼元素组成说明海区营养元素N的不足。海带的不同部位N含量差别很大 ,且在不同海区有较大变化。贻贝贝壳C、H、N和P含量在整个贻贝中占有相对大的比例 ,分别为 30 .4 %、30 .2 %、31.8%和 2 9.6 % ;菲律宾蛤仔、长牡蛎和中国蛤蜊等贝类贝壳中这些元素的相对含量也较高 ;而扇贝贝壳却较低。四十里湾海区每年因贝类和藻类的养殖 ,海区将至少减少 85 0tN和 78tP ,其中贝壳的营养损失占据着相当比例。在海水交换受到一定限制、营养不很丰富的海区 ,养殖生物收获本身也会对海区的营养状况产生影响。根据贝壳N、P的含量 ,笔者认为在营养不很丰富的沿岸海区 ,贻贝、牡蛎最好不养或尽可能少养

关键词：贝类藻类化学组成有机净生产量生态效应烟台四十里湾

Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

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Tungsten 2025年第1期7卷 71-79页

作者： Ruo-Hang Xu Hao-Yu Jiang Dan-Dan Cui Kun-Rong Du Hong-Run zhang Sheng-Jie Xu Ya-Qi Li Zhi-Zhen Ren Liang Wang Wei-Chang Hao yi Du School of Physics and BUAA-UOW Joint Research Centre Beihang University Shenzhen Institute of Beihang University Centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

关键词： Bi4NbO8Br/Bi2WO6 CO2 reduction Heterostructures Photocatalysts

涂料组成成分的快速分析方法——裂解气相色谱/质谱法

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涂料工业 2004年第2期34卷 46-48页

作者：曹京宜付大海张峰杨光付海军涂料分析检测中心海军装备技术研究所北京100072

采用裂解气相色谱 /质谱法对涂料组成成分进行测定 ,适用于各类涂料样品 ,避免了红外、核磁等需经化学分离、提纯方可进行定性测定的繁复冗长的分离步骤 ,具有样品无需前处理、用量少、灵敏度高、谱图直观、分析周期短等特点 ,不仅可确... 详细信息

采用裂解气相色谱 /质谱法对涂料组成成分进行测定 ,适用于各类涂料样品 ,避免了红外、核磁等需经化学分离、提纯方可进行定性测定的繁复冗长的分离步骤 ,具有样品无需前处理、用量少、灵敏度高、谱图直观、分析周期短等特点 ,不仅可确定涂料基料和溶剂的大类 ,还可对每类树脂的具体品种。

关键词：涂料组成成分分析裂解气相色谱/质谱法涂料基料涂料溶剂