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Understanding AIE and ACQ phenomenon of organometallic iridium(Ⅲ) complexes by simple cationization engineering

Chinese Chemical Letters 2024年第2期35卷 553-557页

作者： Weilin song Huiting Mao Ying Gao Yaxuan Yao Guo-Gang shan Zhongmin Su State Key Laboratory of Supramolecular Structure and Materials Institute of Theoretical ChemistryCollege of ChemistryJilin UniversityChangchun 130021China Jilin Provincial Key Laboratory of Straw Based Functional Materials Institute for Interdisciplinary Biomass Functional Materials StudiesJilin Engineering Normal UniversityChangchun 130052China Institute of Functional Material Chemistry and National & Local United Engineering Lab for Power Battery Faculty of ChemistryNortheast Normal UniversityChangchun 130024China College of Life Science Dalian Minzu UniversityDalian 116600China

Understanding the relationship between structure and properties is critical to the development of solidstate luminescence materials with desired characteristics and performance optimization. In this work, we elaborately designed and synthesized a pair of mononuclear iridium(Ⅲ) complexes with similar structures but different degrees of cationization. [Ir2-f][2PF_(6)] with two counterions is obtained by simple Nmethylation of the ancillary ligand of [Ir1-f][PF_(6)] which is a classic cationic iridium(Ⅲ) complex. Such a tiny modification results in tremendously different optical properties in dilute solutions and powders.[Ir1-f][PF_(6)] exhibits weak light in solution but enhanced emission in solid-state as well as poly(methyl methacrylate) matrix, indicative of its aggregation-induced emission(AIE) activity. On the sharp contrary, [Ir2-f][2PF_(6)] is an aggregation-caused quenching(ACQ) emitter showing strong emission in the isolated state but nearly nonemissive in aggregation states. Benefiting from the appealing characteristics of mechanochromic luminescence and AIE behavior, [Ir1-f][PF_(6)] has been successfully applied in reversible re-writable data recording and cell imaging. These results might provide deep insights into AIE and ACQ phenomenon of iridium(Ⅲ) complexes and facilitate the development of phosphorescent materials with promising properties.

关键词： Aggregation induced-emission Cationic iridium(III)complex Counterion Mechanochromic luminescence Cell imaging

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Regeneration of photovoltaic industry silicon waste toward high-performance lithium-ion battery anode

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Rare Metals 2024年第10期43卷 4948-4960页

作者： kai Wang Xiao-Bin Zhong Yue-Xian song Yao-Hui Zhang Yan-Gang Zhang Xiao-Gang You Pu-Guang Ji Kurbanov Mirtemir Shodievich Umedjon Khalilov Gong-kai Wang Xin Zhang Xing-Liang Yao Feng Li Jun-Fei Liang Hua Wang School of Energy and Power Engineering North University of China Zhongyuan Critical Metals Laboratory Zhengzhou University Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Material Science and EngineeringHebei University of Technology Arifov Institute of Ion-Plasma and Laser Technologies Academy of Sciences of the Republic of Uzbekistan New Uzbekistan University Arifov Institute of Ion-Plasma and Laser Technologies Academy of Sciences of Uzbekistan University of Antwerp School of Chemistry Beihang University

The diamond-wire sawing silicon waste（DWSSW） from the photovoltaic industry has been widely considered as a low-cost raw material for lithium-ion battery silicon-based electrode,but the effect mechanism of impurities presents in DWSSW on lithium storage performance is still not well understood;meanwhile,it is urgent to develop a strategy for changing DWSSW particles into high-performance electrode *** this work,the occurrence state of impurities presents in DWSSW was carefully analyzed using in situ Ar ion etching technology Then,the novel Si@C@SiOx@PAl-NDC composite was designed through in situ encapsulation *** obtained Si@C@SiOx@PAl-NDC electrode shows a high first capacity of 2343.4 mAh·g-1with an initial Coulombic efficiency （ICE） of 84.4%under current density of 1.0 A·g-1,and can deliver an impressive capacity of 984.9 mAh·g-1after 200 *** numerical simulation modeling calculations,the increase in proportion of Si4+/Si0and Si3+/Si0valence states in SiOxlayer leads to a decrease in von Mises stress,which ultimately improves the cycling structural ***,the porous 2D-3D aluminum/nitrogen （Al/N） co-doped carbon layer and nanowires on SiOxlayer can provide abundant active sites for lithium storage due to its developed hierarchical pores structure,which facilitates ion transport What is more,the performance of Si@C@SiOx@PAl-NDC//LiFePO4full cell shows its great potential in practical application.

关键词： Aluminum/nitrogen co-doped In situ encapsulation Lithium-ion batteries Porous carbon nanowires Sawing silicon waste

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查干湖水体光谱荧光峰特征与叶绿素α响应关系研究

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红外与毫米波学报 2006年第5期25卷 355-359页

作者：段洪涛张柏刘殿伟张渊智宋开山王宗明中国科学院东北地理与农业生态研究所赫尔辛基技术大学

叶绿素α含量能够在一定程度上反映水质状况,利用遥感的方法监测叶绿素α具有众多优势.通过实测查干湖水体反射光谱和荧光峰特征,分析了2004年5到10月查干湖水的反射谱的荧光峰特征和水质变化的关系.结果表明:1.查干湖水体随着叶绿素α... 详细信息

叶绿素α含量能够在一定程度上反映水质状况,利用遥感的方法监测叶绿素α具有众多优势.通过实测查干湖水体反射光谱和荧光峰特征,分析了2004年5到10月查干湖水的反射谱的荧光峰特征和水质变化的关系.结果表明:1.查干湖水体随着叶绿素α含量的增加,荧光峰位置基本上向长波方向移动,但是并不明显.2.荧光峰位置变化比较适合用于反演叶绿素α含量较高,且范围跨度较大的水体.3.查干湖水体荧光峰高度与叶绿素α具有稳定的响应关系,适合用于叶绿素α定量反演.4.荧光峰高度可以用于查干湖水体叶绿素α定量反演.这些结果为今后利用高光谱遥感技术在查干湖进行叶绿素α含量反演提供了研究和工作基础.

关键词：遥感荧光峰查干湖叶绿素α 高光谱

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基于半分析模型的新庙泡叶绿素a浓度反演研究

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红外与毫米波学报 2008年第3期27卷 197-201页

作者：徐京萍张柏宋开山王宗明刘殿伟段洪涛中国科学院东北地理与农业生态研究所

叶绿素a（Chl-a）含量是反映水体水质的重要参数之一,利用遥感技术监测其浓度具有众多优势.本研究利用2004年5-9月的吉林省新庙泡实测高光谱数据和实验室分析数据,建立了基于三波段的Chl-a浓度反演模型.该模型基于水体叶绿素a、悬浮物... 详细信息

叶绿素a（Chl-a）含量是反映水体水质的重要参数之一,利用遥感技术监测其浓度具有众多优势.本研究利用2004年5-9月的吉林省新庙泡实测高光谱数据和实验室分析数据,建立了基于三波段的Chl-a浓度反演模型.该模型基于水体叶绿素a、悬浮物、溶解有机物、纯水的生物光学特性分析,优化组合了3个特征波长.结果表明用该方法建立的模型具有一定的物理基础,反演精度较高,其决定系数和均方根误差分别为0.8758、4.98μg.L^-1,适合于内陆水体Chl-a含量的定量提取.

关键词：高光谱遥感半分析模型叶绿素a 新庙泡

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Metal vacancy-enriched layered double hydroxide for biomass molecule electrooxidation coupled with hydrogen production

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Fundamental Research 2024年第1期4卷 69-76页

作者： Yingjie song shan Jiang Yeheng He Yu Wu Xin Wan Wenfu Xie Jingjing Wang Zhenhua Li Haohong Duan Mingfei Shao State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China PetroChina Petrochemical Research Institute China National Petroleum CorporationBeijing 100195China Department of Chemistry Tsinghua UniversityBeijing 100084China

The electrochemical oxidation of biomass molecules coupling with hydrogen production is a promising strategy to obtain both green energy and value-added chemicals;however,this strategy is limited by the competing oxygen evolution reactions and high energy ***,we report a hierarchical CoNi layered double hydroxides(LDHs)electrocatalyst with abundant Ni vacancies for the efficient anodic oxidation of 5-hydroxymethylfurfural(HMF)and cathodic hydrogen *** unique hierarchical nanosheet structure and Ni vacancies provide outstanding activity and selectivity toward several biomass molecules because of the finely regulated electronic structure and highly-exposed active *** particular,a high faradaic efficiency(FE)at a high current density(99%at 100 mA cm^(-2))is achieved for HMF oxidation,and a two-electrode electrolyzer is assembled based on the Ni vacancies-enriched LDH,which realized a continuous synthesis of highly-pure 2,5-furandicarboxylic acid products with high yields(95%)and FE(90%).

关键词： Layered double hydroxides Biomass upgrading 5-hydroxymethylfurfural Hydrogen production Coupled oxidation

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Engineering CuMn Prussian blue analog-shelled nanobox for efficient electrochemical reduction of nitrate to ammonia

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Tungsten 2024年第4期6卷 833-844页

作者： Zi-Yi Yang Yu-Dong Li Dan Liu Mao-Sen song Yang Gao Qing-Ping Wu En-shan Han Yan-Zhen He Xiao-Hui Yang School of Chemical Engineering and Technology Hebei University of Technology Key Laboratory of Bio-Based Material Science and Technology Northeast Forestry University Institute of Electrochemical Energy Storage Helmholtz-Zentrum Berlin für Materialien und Energie Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences

Electrocatalytic nitrate reduction reaction（ENRR） for ammonia synthesis is a promising strategy to relieve nitration contamination,as well as an alternative to the Haber-Bosch *** blue analogs（PBAs） are expected to be an electrocatalytic material with superior performance owing to their abundant active sites and open channel ***,most reported PBA materials possess low nitrate conversion and ammonia yield rates,which has led to a hindrance in their research of ***,CuMn-PBA-shelled nanoboxes（CuMn-PBA SNBs） synthesized through tannic acid etching and cation exchange approaches are demonstrated for efficient ammonia *** optimal CuMn-PBA SNBs electrode achieves a high nitrate conversion of 91.33% and ammonia selectivity of 98.87% in a 0.2 mol·L-1Na2SO4solution with100×10-6NO3--N at-1.4 V ***,the CuMn-PBA SNB s electrode exhibits exceptional stability throughout a 30 h electrocatalytic *** outstanding electrochemical performance is attributed to the unique hollow nanobox structure with abundant active sites and high-throughput transport pathways for ions' aspects.

关键词： Acid etching Ammonia synthesis Cation exchange Electrocatalytic nitrate reduction Nanobox Prussian blue analogs

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偏振遥感测量中土壤偏振度随太阳高度角的变化规律初探

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地理科学 2007年第5期27卷 707-710页

作者：杜嘉赵云升宋开山吴太夏东北师范大学城市与环境科学学院吉林长春130024 中国科学院东北地理与农业生态研究所吉林长春130012

偏振是光的一种基本性质。不同地物或同一地物不同状态产生不同的偏振态,且与波长密切相关,因此探测目标地物偏振信息正成为遥感目标识别的新手段。推导了当光倾斜入射到土壤表面时偏振度与太阳高度角之间的函数关系,总结出其中的变化... 详细信息

偏振是光的一种基本性质。不同地物或同一地物不同状态产生不同的偏振态,且与波长密切相关,因此探测目标地物偏振信息正成为遥感目标识别的新手段。推导了当光倾斜入射到土壤表面时偏振度与太阳高度角之间的函数关系,总结出其中的变化规律。太阳高度角是影响辐照度的主要因素,研究土壤偏振度随太阳高度角的变化规律,可以为土壤偏振遥感解译提供重要参数,对地物的精确识别和反演有重要的现实意义。

关键词：土壤偏振度太阳高度角偏振遥感

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查干湖叶绿素a浓度高光谱定量模型研究

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环境科学 2006年第3期27卷 503-507页

作者：段洪涛张柏宋开山王宗明张树清中国科学院东北地理与农业生态研究所

叶绿素a含量能够在一定程度上反映水质状况,利用高光谱遥感可获得叶绿素a的诊断性光谱特性,较好解决了常规遥感中出现的问题.利用野外高光谱仪在查干湖进行了反射光谱测量和同步水质采样分析,通过分析水体叶绿素a浓度与其高光谱反射特... 详细信息

叶绿素a含量能够在一定程度上反映水质状况,利用高光谱遥感可获得叶绿素a的诊断性光谱特性,较好解决了常规遥感中出现的问题.利用野外高光谱仪在查干湖进行了反射光谱测量和同步水质采样分析,通过分析水体叶绿素a浓度与其高光谱反射特征之间的相关关系,尝试采用多种半经验算法建立叶绿素a高光谱定量模型.结果表明:单波段光谱反射率与叶绿素a浓度的相关系数较小,不宜用于估算叶绿素a浓度,反射率比值法和一阶微分法与叶绿素a线性相关程度都比较高,决定系数分别为0.71和0.48,而且其显著水平p<0.01,皆可以用于叶绿素a的定量遥感,但反射率比值算法模拟效果好于一阶微分算法.这为今后利用星载高光谱传感器在查干湖进行叶绿素a浓度大面积遥感反演提供了研究基础.

关键词：查干湖叶绿素a 高光谱定量模型遥感

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基于Landsat影像巢湖蓝藻水华暴发时空变化特征及其驱动因素分析

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长江流域资源与环境 2019年第5期28卷 1205-1213页

作者：李晟铭刘吉平宋开山梁晨高佳吉林师范大学旅游与地理科学学院吉林四平136000 厦门闽矿测绘院厦门福建361000 中国科学院湿地生态与环境重点实验室中国科学院东北地理与农业生态研究所吉林长春130102

为研究巢湖蓝藻水华暴发的规律,该文以Landsat影像作为数据源,采用AFAI指数对藻华进行提取,分析1983～2017年巢湖蓝藻暴发的时空动态变化特征,并探讨巢湖藻华暴发的驱动因素。结果表明:1983～2017年巢湖藻华暴发频次、持续时间都在增加... 详细信息

为研究巢湖蓝藻水华暴发的规律,该文以Landsat影像作为数据源,采用AFAI指数对藻华进行提取,分析1983～2017年巢湖蓝藻暴发的时空动态变化特征,并探讨巢湖藻华暴发的驱动因素。结果表明:1983～2017年巢湖藻华暴发频次、持续时间都在增加,历年最早暴发时间逐渐提前,藻华覆盖面积总体呈增加趋势。巢湖藻华主要分布在西北入湖口,西北部是巢湖藻华暴发的核心区。从其驱动力分析发现,风速、气温和大气压力是导致巢湖暴发重要影响因子,人口增长、GDP快速发展、施肥增加以及生活污水排放量增加是导致巢湖藻华现象日益严重的重要人为因素。

关键词：巢湖蓝藻水华 AFAI 时空分布驱动因子

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Girvanella fossils from the Phanerozoic:Distribution, evolution and controlling factors

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Journal of Palaeogeography 2024年第4期13卷 924-938页

作者： Hua-shan Zhang Ming-Yue Dai Yong-An Qi Lan-Lan Han Zhong-Lei Yin song-Hua Chen Liang-Biao Lin Institute of Sedimentary Geology Chengdu University of Technology School of Resources and Environment Henan Polytechnic University

Girvanella is one of the common genera of cyanobacteria that plays a monumental role in the evolution of life on Earth and the formation of *** on a detailed search in the literature of Girvanella fossils,we have compiled a global database of Girvanella fossils and revealed the evolution of Girvanella fossils throughout the *** species,Girvanella kasakiensis,Girvanella problematica,Girvanella wetheredii,and Girvanella staminea,are recognized and *** data show that Girvanella fossils have well-defined temporal distribution during the Paleozoic Era,have a significant temporal gap in the Mesozoic Era,and have only been recorded sporadically in the Cenozoic *** were relatively abundant during the Cambrian Epoch 2-Early Ordovician,Late Ordovician,Late Devonian-Mississippian,and tended to lesser degrees during the Silurian-Early Devonian,Lopingian Epoch-Middle Jurassic,and Cretaceous-Present ***,the evolution of the abundance and diversity of Girvanella fossils was fundamentally consistent and showed episodical declining during the *** further explore these relationships,we thoroughly compared them with environmental factors such as seawater carbonate saturation state,Ca2+concentration,pH values,and atmospheric partial pressure of carbon dioxide （p CO2）.This study indicates that seawater carbonate saturation state and Ca2+concentration are major controls on secular patterns of the abundance and diversity of Girvanella fossils,together with the secondary factors of pH values and p *** the long history of Girvanella fossils,their abundance and diversity offer the potential to assist the interpretation of the long-term evolution of marine and atmosphere components during the Phanerozoic.

关键词： Girvanella Temporal distribution Abundance Diversity Control factors

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