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Hybridization： A Chemical Bonding Nature of Atoms

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Chinese Journal of Chemistry 2017年第9期35卷 1452-1458页

作者： Dongfeng Xue congting sun Xiaoyan Chen State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

Both the bonding mode and geometry can serve as the chemical bonding nature of central cation, which is essentially determined by the atomic orbital-hybridization. In this work, we focus on the possible chemical bonding scheme of central cations on the basis of a quantitative analysis of electron domain of an atom. Starting from the hybridization of outer atomic orbitals that are occupied by valence electrons, we studied the possible orbital hybridization scheme of atoms in the periodic table and the corresponding coordination number as well as possible molecular geometries. According to distinct hybrid orbital sets, the chemical bonding of central cations can be classified into three typical types, resulting in the cations with a variety of coordination numbers ranging from 2 to 16. Owing to different hybridization modes, the highest coordination number of cations in IA and IIA groups is larger than that in IB--VIIIB groups, and the coordination number of lanthanide elements is most abundant. We also selected NaNO3, Fe（NO3）3·9H2O, Zn（NO3）2·6H2O, Y（NO3）3·3H2O, and La（NO3）3·6H2O as examples to confirm the direct relationship between chemical bonding characteristics and orbital hybrid set by IR spectra. The present study opens the door to reveal the chemical bonding nature of atoms on the basis of hybridization and will provide theoretical guides in structural design at an atomic level.

关键词： hybridization chemical bonding coordination number central cations rare earth

Pulling growth technique towards rare earth single crystals

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Science China(Technological Sciences) 2018年第9期61卷 1295-1300页

作者： sun congting XUE DongFeng State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences

Pulling growth technique serves as a popular method to grow congruent melting single crystals with multiscale sizes ranging from micrometers to centimeters.In order to obtain high quality single crystals,the crystal constituents would be arranged at the lattice sites by precisely controlling the crystal growth process.Growing interface is the position where the phase transition of crystal constituents occurs during pulling growth process.The precise control of energy at the growing interface becomes a key technique in pulling growth.In this work,we review some recent advances of pulling technique towards rare earth single crystal growth.In Czochralski pulling growth,the optimized growth parameters were designed for rare earth ions doped Y_3Al_5O_(12)and Ce:(Lu_(1-x)Y_x)_2Si O_5on the basis of anisotropic chemical bonding and isotropic mass transfer calculations at the growing interface.The fast growth of high quality rare earth single crystals is realized by controlling crystallization thermodynamics and kinetics in different size zones.On the other hand,the micro pulling down technique can be used for high throughput screening novel rare earth optical crystals.The growth interface control is realized by improving the crucible bottom and temperature field,which favors the growth of rare earth crystal fibers.The rare earth laser crystal fiber can serve as another kind of laser gain medium between conventional bulk single crystal and glass fiber.The future work on pulling technique might focus on the mass production of rare earth single crystals with extreme size and with the size near that of devices.

关键词：生长技术晶体稀土元素水晶生长精确控制阶段转变多尺度成分

4f chemistry towards rare earth materials science and engineering

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Science China(Technological Sciences) 2017年第11期60卷 1767-1768页

作者： XUE DongFeng sun congting State Key Laboratory of Rare Earth Resouree Utilization Changchun Institute of Applied ChemistryChinese Academy of ScieneesChangchun 130022China

The big challenge in rare earth(RE)resource utilization is to effectively manage their balanced use and advanced applications of 17 elements(Sc,Yand La-Lu)[1,2].As a family,RE materials possess outstanding optical,electronic,and magnetic properties owing to the unique valence electron structure of RE elements,especially the 4f electrons[3].With increasing demands of modern applications,the

关键词：稀土元素材料科学与工程资源利用化学稀土材料有效管理平衡利用电子结构

Solution-based Chemical Strategies to Purposely Control the Microstructure of Functional Materials

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Journal of Materials Science & Technology 2008年第4期24卷 641-648页

作者： Fei LIU congting sun Chenglin YAN Dongfeng XUE State Key Laboratory of Fine Chemicals Department of Materials Science and Chemical Engineering School of Chemical Engineering Dalian University of Technology Dalian 116012 China

Micro/nanostructured crystals with controlled architectures are desirable for many applications in optics, electronics, biology, medicine, and energy conversions. Low-temperature, aqueous chemical routes have been widely investigated for the synthesis of particles, and arrays of oriented nanorods and nanotubes. In this paper, based on the ideal crystal shapes predicted by the chemical bonding theory, we have developed some potential chemical strategies to tune the microstructure of functional materials, ZnS and Nb205 nanotube arrays, MgO wiskers and nestlike spheres, and cubic phase Cu2O microcrystals were synthesized here to elucidate these strategies. We describe their controlled crystallization processes and illustrate the detailed key factors controlling their growth by examining various reaction parameters. Current results demonstrate that our designed chemical strategies for tuning microstructure of functional materials are applicable to several technologically important materials, and therefore may be used as a versatile and effective route to the controllable synthesis of other inorganic functional materials.

关键词： Functional materials Chemical strategy Chemical bonding theory Microstructure

Chemical bonding in micro-pulling down process: High throughput single crystal growth

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Science China(Technological Sciences) 2018年第11期61卷 1776-1778页

作者： sun congting XUE DongFeng State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences

The micro-pulling down (MPD) method is a high-efficiency crystal growth technique from melt, which has been invented by French scientist Ricard in 1975 [1] and developed by Japanese scientist Fukuda since 1992 [2] and French scientist Lebbou in 2000s [3]. Appropriate configuration of a die at the crucible bottom and the proper selection of temperature gradient allow the crystal shape control during growth of crystals with the cross section of 0.1–10 mm without mechanical and thermal stresses [2]. MPD growth method is an economical and quick single crystal growth technique, which may be used for high throughput screening novel rare earth optical crystals [4,5].

关键词： micro-pulling micro-pulling down(MPD

Multisize and multiweight effects in materials science and engineering

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Science China(Technological Sciences) 2019年第4期62卷 707-710页

作者： sun congting XUE DongFeng State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences

Materials mainly refer to the matters with a certain composition,structure,and property,which can be formed by natural mineralization or artificial manufacture and are widely used in various specific fields,therefore,... 详细信息

关键词： matters basis fields

Mewsoscale crystallization of Functional materials

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Mewsoscale crystallization of Functional materials

Mesoscale crystallization of rare earth functional materials

中国化学会第九届全国无机化学学术会议

作者： Dongfeng Xue congting sun Kunfeng Chen State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences

During crystallization materials often experience a series of phase transformations in mesoscale,which may be monitored by in situ measurements of attenuated total reflectance-infrared（ATR-IR） spectroscopy[1-5].As shown in Scheme 1,some examples like urea were used to show the materials crystallization process.Colloidal supercapacitor systems were introduced by controlling the crystallization of metal cations in suitable electrolytes[6,7].

关键词： rare earth functional materials pseudocapacitor Chemical bonding theory of single crystal growth mesoscale crystallization YAG

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Mesoscale crystallization of rare earth functional materials

mFOLFOX7方案全身化疗联合卡瑞利珠单克隆抗体和阿帕替尼治疗肝细胞癌合并Vp4型门静脉癌栓的疗效

第二届海峡两岸功能材料科技与产业峰会（2015）

作者： Dongfeng Xue congting sun Kunfeng Chen State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences

Performances of rare earth functional materials are strongly dependent on their crystallization status[1-6],crystallization including both nucleation and crystal growth has long been attracting much interest in the community.In this talk,mesoscale crystallization of some rare earth functional materials will be introduced

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中华消化外科杂志 2024年第2期23卷 265-271页

作者：彭林辉陈涛徐云修修王捷陈捷李永黄拼搏钟国平陈茜叶聪婷陈亚进中山大学孙逸仙纪念医院肝胆外科广州510120 中山大学孙逸仙纪念医院放射科广州510120

目的探讨mFOLFOX7方案全身化疗联合卡瑞利珠单克隆抗体和阿帕替尼治疗肝细胞癌合并Vp4型门静脉癌栓的疗效。方法采用单臂、开放、探索性临床研究方法。收集2021年4月至2023年10月中山大学孙逸仙纪念医院收治的15例肝细胞癌合并Vp4型门... 详细信息

目的探讨mFOLFOX7方案全身化疗联合卡瑞利珠单克隆抗体和阿帕替尼治疗肝细胞癌合并Vp4型门静脉癌栓的疗效。方法采用单臂、开放、探索性临床研究方法。收集2021年4月至2023年10月中山大学孙逸仙纪念医院收治的15例肝细胞癌合并Vp4型门静脉癌栓患者的临床病理资料;男14例,女1例;年龄为48(33~67)岁。患者均行mFOLFOX7方案+卡瑞利珠单克隆抗体+阿帕替尼治疗。观察指标:(1)临床疗效。(2)生存情况。偏态分布的计量资料以M(范围)表示。计数资料以绝对数或百分比表示。结果(1)临床疗效。15例患者均行mFOLFOX7方案+卡瑞利珠单克隆抗体+阿帕替尼治疗。根据实体瘤反应评价标准v1.1评估,15例患者客观缓解占比为10/15,完全缓解占比为1/15,部分缓解占比为9/15,疾病控制占比为15/15;中位无进展生存时间和中位总生存时间均未达到(>9个月)。根据改良实体瘤反应评价标准评估,15例患者客观缓解占比为12/15,完全缓解占比为6/15,部分缓解占比为6/15,疾病控制占比为15/15;中位无进展生存时间和中位总生存时间均未达到(>9个月)。15例患者中,7例成功转化(手术转化占比为7/15,均实现R0切除),6例转化失败,2例尚在转化治疗。7例成功转化患者中,5例病理学完全缓解;1例主要病理学缓解,90%肿瘤坏死;1例影像学检查完全缓解,但在继续观察中肝脏出现多处新发病灶,予以手术切除,组织病理学检查证实有肝内多发转移。15例患者治疗相关不良反应发生占比为13/15,其中≥3级不良反应发生占比为7/15,包括腹泻(3/15)、中性粒细胞减少(2/15)、血小板减少(2/15)和丙氨酸转氨酶增高(2/15)。同1例患者可发生≥1种不良反应。患者均经对症治疗后好转。(2)生存情况。15例患者均获得随访,随访时间为13.0(2.0~31.0)个月。随访期间3例患者死亡,其中1例为部分缓解,发生上消化道出血死亡,生存时间为7.5个月;1例为肝内多发转移,肿瘤>70%肝体积,生存时间为9.5个月;1例为肝脏多发肿瘤合并双肺转移,达到部分缓解,病情进展后死亡,生存时间为13.5个月。7例行手术患者术后随访时间为14.0(2.0~25.0)个月。7例患者中,1例术后20.0个月复发,6例至随访截止时间均无复发(3例治疗结束进入随访观察),最长生存时间为31.0个月。结论mFOLFOX7方案全身化疗联合卡瑞利珠单克隆抗体和阿帕替尼治疗肝细胞癌合并Vp4型门静脉癌栓安全、可行。

关键词：肝肿瘤门静脉癌栓全身化疗免疫检查点抑制剂抗血管生成靶向药物疗效