新型A1TiBRE中间合金细化剂的微观组织特征分析

用ON、XRD、SEN、EDAX等对经不同制备工艺获得的AITiB和新型AITiBRE中间合金细化剂进行了微观组织的观察分析比较。结果表明：地TiBRE中间合金中细化相主要为TiA13和TiB2，还存在着不稳定的（AITiRE）相；地TiBRE中间舍金中细化相质点的分布形态优于A13TiBRE中间合金；氟盐法所制备的地TiBRE中间合金中细化相的分布更为均匀弥散与细小，优于纯Ti粉颗粒法制备的地TiBRE中间合金的组织。     

一个表征烷基苯类化合物性质的信息拓扑指数I_s

本文以Balaban在定义J指数时的距离度Sj为基础提出了一个表征烷基苯类化合物性质的信息拓扑指数Is.该指数如同信息拓扑指数Iz和Ix易于计算,与现有的一些拓扑指数相比较,无论对烷基苯的加和型性能(如标准生成热、摩尔折射度等)还是凝聚型性能(如沸点等)都是具有较好的结构选择性和性质相关性.     

吡啶-2-羧酸铜的合成及在光促进溴代烃羰基化反应中催化性能研究

本文合成了Cu(P ic)2(吡啶-2-羧酸铜),用红外光谱进行表征;研究了光促进下,以Cu(P ic)2为催化剂,1-溴辛烷、溴代十二烷、溴代环己烷为底物与CO的羰基化反应,结果表明,Cu(P ic)2对光促进溴代烃的羰基化反应具有良好的催化作用.     

抗冻型“石膏板脱膜剂”的制备

本文通过实行对比 ,进一步探索了用棕榈油制备抗冻型石膏板脱膜剂的配比和工艺条件 ,解决了该产品生产中存在的问题     

对烷基吸电子效应的探讨

扼要介绍了烷基的吸电子效应 ,并通过偶极矩的计算分析了甲基吸电子效应的成因     

烷基萘的折光指数与其分子结构之间定量关系的拓扑化学研究

根据分子拓扑学原理,用距离矩阵表征分子中碳原子之间的连接性,探讨了烷基萘的折学指数与其分子结构之间的关系,提出一个既能合理表征烷基萘的结构性能关系、又能预测折光指数的定量关系式。对60种烷基萘（C10-C22）的计算结果表明,烷基萘折光指数的预测值与实验值之间的一致性令人满意,平均绝对误差0.0043,平均相对误差0.27%。     

二甘醇单醚的合成和性能

以二甘醇和卤代烷为原料,用相转移催化法合成了７种二甘醇单烷基醚,均获得较高产率。讨论了二甘醇单醚合成的应用历程,并对其物理常数,水溶液的表面张力,起泡性能,临界胶束浓度进行了测试和分析。     

Regulating off-centering distortion maximizes photoluminescence in halide perovskites

Metal halide perovskites possess unique atomic and electronic configurations that endow them with high defect tolerance and enable high-performance photovoltaics and optoelectronics. Perovskite light-emitting diodes have achieved an external quantum efficiency of over 20%. Despite tremendous progress, fundamental questions remain, such as how structural distortion affects the optical properties. Addressing their relationships is considerably challenging due to the scarcity of effective diagnostic tools during structural and property tuning as well as the limited tunability achievable by conventional methods. Here, using pressure and chemical methods to regulate the metal off-centering distortion, we demonstrate the giant tunability of photoluminescence (PL) in both the intensity (>20 times) and wavelength (>180 nm/GPa) in the highly distorted halide perovskites [CH₃NH₃GeI₃, HC(NH₂)₂GeI₃, and CsGeI₃]. Using advanced in situ high-pressure probes and first-principles calculations, we quantitatively reveal a universal relationship whereby regulating the level of off-centering distortion towards 0.2 leads to the best PL performance in the halide perovskites. By applying this principle, intense PL can still be induced by substituting CH₃NH₃⁺ with Cs⁺ to control the distortion in (CH₃NH₃)_1-xCs_xGeI₃, where the chemical substitution plays a similar role as external pressure. The compression of a fully substituted sample of CsGeI₃ further tunes the distortion to the optimal value at 0.7 GPa, which maximizes the emission with a 10-fold enhancement. This work not only demonstrates a quantitative relationship between structural distortion and PL property of the halide perovskites but also illustrates the use of knowledge gained from high-pressure research to achieve the desired properties by ambient methods.     

潜影理论的研究进展

回顾了潜理理论的发展过程,从光生电子和空穴的产生、捕获及功能,潜影的临界尺寸以及潜影银的成核与生长等方面对潜影理论的研究进行了综述,并对潜影理论的发展趋势做了展望     

烷基的电子效应浅析

该文简要论述了烷基的吸电性与供电性．