A NOVEL SECOND-ORDER TRANSITION IN ORGANIC HYBRIDS CONSISTING OF POLYMERS AND SMALL MOLECULES

A novel transition appeared above thc glass transition temperature of chlorinated polyethylene (CPE) for binaryblends of CPE and additives such as organic small molecules or oligomers. This transition was assigned to the dissociation ofintermolecular hydrogen bonds between the polymer ard additive within the edditive rich phase. Of particular interest is thata novel pyramid crystal was observed in the annealed CPE/hindered phenol blends. Another intriguing observation is thatthese polymer/small molecule blends organized by intermolecular hydrogen bonding have several potential properties, suchas shape-memorization, self-restoration, self-adhesiveness and super damping.

An 8-Connected Chiral Lanthanide Metal-organic Framework Constructed from Naturally Camphoric Acid:Crystal Structure,Vibrational Circular Dichroism Spectroscopy and Second-order Nonlinear Optical Effect

A chiral lanthanide metal-organic framework based on enantiopure camphoric acid （D-H2cam）, [Nd3（D-cam）8（H2O）4Cl]n （1）, has been synthesized and characterized by single-crystal X-ray structural analysis, elemental analysis, IR, thermal gravimetric, and X-ray powder diffraction. Crystal data for the title compound are as follows： orthorhombic system, space group P212121 with a = 13.8287（7）, b = 14.0715（7）, c = 25.7403（12） A^°, V = 5008.8（4） A^°3, Mr = 1333.08, Z = 4, F（000） = 2644, Dc = 1.768 g/cm^3, μ（MoKα） = 3.189 mm^-1, the final R = 0.0351 and wR = 0.0814 （I 〉 2σ（I））. Compound 1 displays an 8-connected bcu topology 3D framework and hydrogen-bonding interactions stabilize the solid-state structure. The vibrational circular dichroism （VCD） spectrum and second-order nonlinear optical effect of compound 1 have been studied in the solid state.

Optimization of solvent swelling for efficient organic solar cells via sequential deposition

Compared to bulk heterojunction(BHJ)organic solar cells(OSCs)prepared by the blend casting in“one step process”,sequential deposition(SD)processed OSCs can realize an ideal profile of vertical component distribution due to the swelling of polymer films.Herein,we did trials on several kinds of second solvents for swelling the polymer layer,and investigated the packing structure and morphology of the swollen films and the performance of the resulting devices.We found that an optimized morphology can be achieved by solvent swelling while using orthodichlorobenzene(o-DCB)as the second layer processing-solvent,with polymer donor PffBT-3 as bottom layer,PC71BM as top layer and bicontinuous networks in the middle.Such solvent swelling process also makes the SD method exempt from thermal annealing treatment.The device based on SD yields a power conversion effi-ciency(PCE)up to 8.7%without any post-treatment,outperforming those from the devices based on SD using other solvents and that(7.06%)from BHJ device,respectively.We also extended the use of this approach to allpolymer blend system,and successfully improved the efficiency from 4.72%(chloroform)to 9.35%(o-DCB),which is among the highest PCEs in all-polymer-based OSCs fabricated with SD method.The results demonstrate that the swelling of the polymer by the second layer solvent is a necessity for SD,paving the way towards additivefree high-performance OSCs.

ZTE Achieves Second Place in World Intellectual Property Organization Patent Table

March 18, 2014-ZTE Corporation achieved second place in the World Intellectual Pro ble of patent applicants, strengthening the company＇ s position as one of the world＇ s leading With 2309 filings under the Patent Cooperation Treaty （PCT）, ZTE was second only to ZTE ranked number one. perty Organization＇s annual ta- technology innovators. Panasonic. In 2011 and 2012,

The Second International Conference on HSLA Steels——Beijing,China,October 1990 Organized by THE CHINESE SOCIETY OF METALS

GENERAL INFORMATIONThe Chinese Society of Metals is pleased to announcethat The Second International Conference on HSLASteels (HSLA’90) will be held in Beijing,China inOctober 1990.Much progress in research and devel-opment of HSLA steels has been achieved by theworld’s metallurgical and materials community since

The Second International Conference on HSLA Steels Beijing,China,October 1990 Organized by THE CHINESE SOCIETY OF METALS

GENERAL INFORMATIONThe Chinese Society of Metals is pleased to announcethat The Second International Conference on HSLASteels(HSLA’90)will be held in Beijing,China inOctober 1990.Much progress in research and devel-opment of HSLA steels has been achieved by theworld’s metallurgical and materials community since

The World's Largest Exhibition of Textile Machinery Goes to Italy in 2015 after 20 Years——MP International appointed to organize the show for the second time

Italy will host the 17th edition of ITMA, the world’s largest exhibition of textile machinery.It will be held at the Fiera Milano Rhoexhibition centre in Milan,from 12 to 19 November 2015.

MOLECULAR DESIGN STUDY ON THE NEW ORGANIC NONLINEAR OPTICAL MATERIALS

In this paper,the second-order nolinear-optical coefficients of a series of conjugated substituted polyenes have been colculated by the semi-empirical CNDO/S-CI method.we have studied in deiail the influence on the number of substituents,the location of the substituents and the conjugation length in motecules to the NLO coefficient Bvace The results showed that the introduetion of the electroinc donor and acceptor groups and the increase in the distance between the substituents and the conjugated length may lead to enhanced NLO responses.It is also shown that the caiculoted In Bvec is linear with the number of double bonds in planar and linear tians substituted polyenes.A saturation effect in substitution is also presented.Based on these discussion one can provide the theorilical guidelines for designing and synthesizing of molecules with larger NLO coefficients.

Porous organic cages as a novel platform for second harmonic generation

Second harmonic generation(SHG) is one of the most extensively applied nonlinear optical phenomena. Compared to traditional inorganic SHG materials, organic SHG materials, including non-centrosymmetric small molecular crystals and organic polymers, have been extensively explored for SHG optics due to their advantageous properties, including high light-induced damage threshold, ultrafast response speed, high polarization ratio, wide transparency range, and elevated dielectric constant. However,in organic SHG materials, most small molecular crystals often show poor thermal stability(<200 ℃) due to their low molecular weight, which is an important obstacle for practical application under high temperatures. On the other hand, the difficulty in the growth of large-size crystals as well as the disorderly array of chromospheres on polymer chains associated with organic polymers have hindered their widespread application in SHG due to the requirements of processability and homogeneity.Therefore, it is significantly necessary to develop novel organic SHG material with high thermal stability, large-size crystals,excellent processability, high homogeneity, and a well SHG effect. In the contribution, we developed herein porous organic cages(POCs) as a novel platform for SHG optics. Thanks to its inherent macromolecular composition and zero-dimensional discrete structures, POCs can not only solve the instability problem of small molecule crystals but also overcome the drawbacks in growing large-size crystals for organic polymer. The obtained two POCs with chiral asymmetric centers(CPOC-R-5 and CPOCS-7) display advantageous features for SHG optics including well SHG performance, large-size crystal(5 mm×3 mm×1 mm),high thermal stability(≥250 ℃), wide transparency window(750–2,000 nm) and high polarization ratio(up to 94.5%). This work thus develops POCs as a new platform toward the construction of organic NLO materials with the potential application in sorts of SHG optics.

Second Harmonic Generation in Some Donor-Acceptor Substituted Chalcone Derivatives

A series of five chalcone derivatives with different substituents in para and meta posions have been synthesized, and single crystals were successfully grown in aceton solution by slow evaporation solution growth technique (SESGT). Single crystal X-ray studies revealed that all the crystals crystallized in noncentrosymmetric space group with their molecular dipoles perfectly aligned in a direction-favorable for large nonlinear optical effects. Kurtz powder tests revealed that all five materials have second-harmonic-generating properties with maximum efficiencies of approximately 14 times that of urea standard. UV-vis-NIR spectroscopy and thermogravimetric analyses are also presented for all of the reported materials. Among the five chalcones, high quality single crystals of 4-Methoxy-4'-chlorochalcone were grown by SESGT, and its crystalline perection were studied by using a high resolution X-ray diffractometry (HRXRD).

Irradiation Effect on Second Harmonic Generation of Dyes Doped KDP Crystals

Most irradiation studies in the hydrogen bonded ferroelectrics have been concentrated on the transient defects induced by ionising radiation, such as ultraviolet （UV） light, where the defects are closely related to the optical properties. But heavy ion beam irradiation effects have rarely been studied. The structural, optical, and non-linear optical properties of the doped crystals were analyzed with the characterization studies, such as powder XRD, UV-Visible and second harmonic generation （SHG） measurements, respectively. The results for doped KDP crystal were compared with the results of the pure KDP crystals. The experiment results showed that Li^3＋ irradiation leads to the development of a well-defined surface H peak in dye doped KDP crystals. The stability of KDP single crystal was improved by doping organic dyes. The nano-islands of dye in KDP were likely to be dissolved and enhance the non-linear optical properties of these materials.

Recent developments of fluorescence imaging technology in the second near-infrared window

Background:Fluorescence bio-imaging in the second near-infrared window(NIR-II FL,1000-1700nm)has great potential in clinical theranostics,which is of great importance providing precise locations of lesions and molecular dynamic actions simultaneously in a single nanoprobe.Methods:T here has been an upsurge of multidisciplinary research focusing on developing functional types of inorganic and organic nanoprobes that can be used for NIR-II FL with the high spatiotemporal resolution,deep tissue penetration,and negligible auto-fluorescence.Results:In this mini-review,we summarize recent progress in inorganic/organic NIR-II FL nanoprobes.We introduce the design and properties of inorganic and organic nanoprobes,in the order of single-walled carbon nanotubes,quantum dots,rare-earth-doped nanoparticles,metal nanoclusters and organic fluorophores,expect to realize precise diagnosis and efficient image-guided therapy.Conclusion:Meanwhile,to elucidate the problems and perspectives,we aim to offer diverse biological applications of inorganic/organic NIR-II FL nanoprobes and accelerate the clinical transformation progress.

陆相咸化湖盆“低TOC”烃源岩高生烃效率探讨——以苏北盆地溱潼凹陷阜宁组二段泥页岩为例

苏北盆地溱潼凹陷阜宁组二段(以下简称阜二段)页岩油勘探取得重大突破,但其泥页岩总有机碳含量(TOC)普遍不高,一般低于2%。业界认为陆相咸化湖盆“低TOC”烃源岩能生成大量油气,称之为陆相咸化湖盆的“低TOC”高效生烃模式。由于生排烃效应,烃源岩的TOC会降低,因此,恢复烃源岩原始TOC对客观认识烃源岩的生烃能力、油气资源评价和持续增储上产具有重要意义。以溱潼凹陷典型钻井阜二段泥页岩为研究对象,利用生烃模拟实验和岩石热解资料,采用热模拟TOC演化、有效碳(PC)演化和元素质量守恒法,对QY1井阜二段泥页岩TOC进行了恢复。结果表明:咸化湖盆烃源岩的TOC恢复系数最高可达3~4,且受到岩相的重要影响。随着热演化程度增高,TOC恢复系数增大,纹层状页岩TOC恢复系数高于块状泥岩,QY1井阜二段Ⅳ亚段泥岩、Ⅰ—Ⅲ亚段页岩TOC恢复系数可分别高达1.1~1.5、1.5~3.0。母质类型和生烃活化能的差异导致页岩成烃转化率和TOC恢复系数高于泥岩。

高邮凹陷花庄地区阜二段烃源岩有机地化特征与含油性

利用最近钻探的几口页岩油探井资料,开展苏北盆地高邮凹陷花庄地区古近系阜宁组二段烃源岩有机地化特征和含油性研究。通过对有机碳含量、氯仿沥青“A”、总烃含量和生烃潜量(S_(1)+S_(2))等指标的分级评价,以及对干酪根显微组分、镜质体反射率(R_(o))、岩石热解最高峰温(T_(max))、正构烷烃分布和生物标志物组成等参数分析,有机质丰度总体上达到好烃源岩-优质烃源岩标准;有机质类型主要为Ⅰ型、Ⅱ_(1)型和Ⅱ_(2)型,且从下往上,有机质类型变好;有机质成熟度总体到达成熟—高成熟阶段。采用两种方法(游离油含量法和含油饱和指数法)对花庄地区阜二段烃源岩含油性进行评价,认为其含油性到达Ⅰ类或Ⅱ类标准,具有较大的勘探潜力。研究结果对高邮凹陷下一步页岩油勘探地质甜点的选择起到一定的指导作用。

一引二点三推模式在推拿教学中的实践——以推拿功法学小工具辅助创新训练为例

基层教学组织建设“一引二点三推”模式就是以教师“教”、学生“学”、“教与学”的教学主体,“引”出高水平的基层教学团队、“点”出适应时代发展的人才培养体系、“推”出服务社会的教学延展平台,以夯实基层教学组织单元,为基层教学组织建设创建新模式。以推拿功法学小工具辅助创新训练为例,探索一引二点三推模式的实际运行方式,总结教学方法和实践经验,以期为一引二点三推模式在教学中的推广应用打下基础,为其他学科基层教学组织建设提供参考。

Progress and Challenges of Water-soluble NIR-II Organic Fluorophores for Fluorescence Imaging In vivo

The small-molecule fluorophores for the second near-infrared(NIR-II,1000–1700 nm)window have attracted increasing attention in basic scientific research and preclinical practice owing to their deep-photo penetration,minimal physiological toxicity and simplicity of chemical modification.However,most of the reported small-molecule NIR-II fluorophores suffered from poor water solubility,which can easily cause organ toxicity.In addition,the aggregation caused by their poor water solubility in the aqueous solution would also result in weak fluorescence of these NIR-II fluorophores.Thus,it is highly desirable and valuable to develop water-soluble small-molecule NIR-II fluorophores with excellent photophysical properties for high-contrast in vivo imaging.In this review,we summarize the recent research advances in water-soluble small-molecule NIR-II fluorophores and highlight the representative bioimaging applications.Moreover,the potential challenges and perspectives of water-soluble small-molecule NIR-II fluorophores are discussed as well.We anticipate this review can help researchers to grab the latest information of water-soluble small-molecule fluorophores for NIR-II imaging,sequentially boosting their further development.

护士第二受害者组织支持形式影响因素分析

目的:调查护士期望获得的第二受害者组织支持形式,并探讨其影响因素。方法:采用便利抽样选取2020年10月—2021年1月贵州、四川、湖北6所三级甲等医院3 996名护士作为调查对象,采用一般资料调查表、第二受害者期望的组织支持形式量表进行横断面调查,采用多元线性回归分析其影响因素。结果:第二受害者组织支持形式得分为(27.39±4.67)分。最受护士欢迎的形式是“能和一名受人尊敬的同行讨论所发生事件的细节”(85.9%),反之是“能马上离开单位一段时间”(37.0%)。多元回归分析显示,性别、聘用形式是影响护士选择组织支持形式的主要因素(P<0.05)。结论:护士普遍渴望获得医疗机构提供的组织支持,女护士和编制护士对组织支持的期望度较高,管理者可根据护士期望的支持形式提供组织支持。

邯长增建二线引入长治地区方案研究

邯长线悬钟至长治北段作为全线唯一单线区段,是通道能力的短板,项目的建设能够提升线路能力、优化区域路网格局、提升路网韧性和灵活性,是补强了路网短板,打通能力瓶颈的重要提升工程。根据地区分方向客货运量、客货运流向、机车交路及长治北站布局、既有车站平面布置条件,统筹考虑太焦二线引入,考虑到研究年度长治北站各方向货物列车仍需在车站换挂机车,同时交接场作为货物的煤炭运量的主要来源,畅通其直接接发车通路,有利于优化运输组织,缓解车站到发场能力,经研究分析,推荐采用增二线并行既有邯长线引入长治北站方案。

LENGTH DEPENDENCE OF THE NONLINEAR OPTICAL SECOND-ORDER SUSCEPTIBILITY ON CONJUGATED ORGANIC MOLECULES

It is known that organic conjugated molecules with delocalized π-electron systems exhibit large nonlinear optical responses. The conjugated length is an important factor contributing to the nonlinear optical susceptibility.