Synthesis and studies of blue light emitting polymers containing triphenylamine‐substituted fluorene and diphenylanthracene moiety

Photoluminescent (PL) polymers containing triphenylamine‐substituted fluorene and diphenylanthracene (DPA) units were synthesized by aromatic nucleophilic substitution reaction. The light emitting polymers (LEPs) contains hole‐transporting triphenylamine (TPA) groups at the C‐9 position of fluorene and DPA‐emitting segments in the main chain. The obtained polymers were soluble in various organic solvents and thermally stable. The synthesized polymers were successfully characterized by elemental analyses, FTIR and, ¹H NMR spectroscopy. The electrochemical measurements and optical properties of the polymers were also studied. The obtained polymers showed significant blue emission. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

含芴功能材料的研究与应用

从芴的结构特点出发,讨论了芴的基本性质,包括化学结构特征、酸性与反应活性、热稳定性、光谱特征;综述了含芴结构的重要有机中间体,如芴酮、芴甲醇的化学特性与应用;综述了含芴结构的高分子材料改性单体,如双酚芴、9,9-双(3-氨基-4-羟苯基)芴等,以及它们在各种材料改性中的应用;介绍了含芴结构化合物在感光与光导材料领域的应用,如9,9-二烷基芴、芴-三苯胺结构化合物、芴-偶氮结构化合物;介绍了含芴结构的电致发光材料,如聚烷基芴、芴-噻吩共聚物、芴-噁二唑共聚物等;还介绍了含芴结构的医药与农药,如苯芴醇和含芴结构的植物生长激素;另外还介绍了用于催化剂领域的含芴功能化合物。     

芴环结构对聚碳酸酯热性能的改进

对聚碳酸酯结构与其热性能的关系进行分析介绍,并对采用非双酚A类聚合单体,特别是具有Cardo环结构的双酚类化合物参与进行聚碳酸酯合成的方法及其对聚碳酸酯热性能的改进研究,进行了系统的分析归纳,采用上述单体聚合得到的聚碳酸酯热性能具有明显的提高.     

聚丙烯新型外给电子体聚合评价的研究

采用液相本体聚合法,以硅醚9-(甲氧甲基)-9-[(三甲基硅基)氧基甲基]芴(DTSF)、甲基环己基二甲氧基硅烷(CHMMS)、二环戊基二甲氧基硅烷(DCPDMS)为外给电子体,以DTSF/CHMMS和DTSF/DCPDMS为复配外给电子体,考察了聚丙烯NG催化剂的丙烯聚合性能。实验结果表明,DTSF外给电子体的氢调敏感性较好,但聚合活性和聚丙烯等规度与CHMMS和DCPDMS外给电子相比偏低;DTSF/CHMMS复配外给电子体可明显提高NG催化剂的氢调敏感性、聚丙烯等规度及聚合活性,较适宜的配比为n(CHMMS)∶n(DTSF)=1∶1;将DTSF与DCPDMS外给电子体进行复配无实际意义。     

Biological half-lives of eight polycyclic aromatic hydrocarbons (PAHs) in rainbow trout (Salmo gairdneri)

Adult rainbow trout were exposed to a single oral dose containing a mixture of eight PAHs, and fish were sampled at intervals between 5–48 days after exposure. Regression analyses on whole fish indicate levels declined significantly in four of the compounds monitored. Their biological half-lives were estimated as 9 days for phenanthrene, 7 days for fluorene and anthracene and 6 days for fluoranthene. No reliable estimates could be derived for benzo[a]pyrene, benz[a]anthracene, chrysene or pyrene because of low or nondetectable concentrations at the first sample interval although it could be suggested that their half-lives would be less than several days. The data also suggested that these PAHs are poorly absorbed by trout.     

空间结构聚芴的设计及光电性能

用一种简单的缩合方法合成了具有新颖空间结构的聚芴材料,并用DSC、TGA、循环伏安法、荧光测试等技术对聚芴材料进行了表征。结果表明:该聚芴材料具有很高的Tg(164℃或234℃)和热分解温度、稳定的电化学性能和较高的荧光性能。该材料在真空100℃热处理24 h后,保持了稳定的荧光性能。     

Thermophysical properties of the liquid organic hydrogen carrier system based on diphenylmethane with the byproducts fluorene or perhydrofluorene

Fluorene (H0-F) and perhydrofluorene (H12-F) represent process-related byproducts formed by a dehydrocyclization step in the liquid organic hydrogen carrier (LOHC) system based on diphenylmethane (H0-DPM) and dicyclohexylmethane (H12-DPM). The influence of these byproducts on the liquid viscosity, surface tension, and liquid density of the DPM-based system was experimentally determined by studying three dehydrogenated binary mixtures with H0-F mole fractions of 0.05, 0.10, and 0.20 as well as one hydrogenated binary mixture with an H12-F mole fraction of 0.10 close to 0.1 MPa from (283–573) K. The densities increase with increasing share of H0-F or H12-F by around 1% per added byproduct mole fraction of 0.1. For the surface tension, an increase relative to the values of H0-DPM or H12-DPM by up to 6% is found. The addition of H0-F to H0-DPM or H12-F to H12-DPM yields a relative increase in viscosity by up to 9% at the lowest temperature studied.