共查询到17条相似文献,搜索用时 93 毫秒
1.
2.
3.
本文对2-氨基-9,9-二甲基芴的合成工艺进行研究。由芴为起始原料,通过选择不同的合成方法,改变反应条件,确定最佳的合成工艺。反应产物通过高效液相色谱检测其纯度,通过核磁共振确定结构,所得产物均与目标化合物相符。 相似文献
4.
5.
6.
7.
8.
9.
10.
11.
12.
2,7-dibromo-9,9-bis(perfluorohexylethyl propionate) fluorene was synthesized by Michael addition reaction using 2,7-dibromofluorene and perfluorohexyl ethyl acrylate as the reactants. 9,9-Bis(perfluorohexylethyl propionate) fluorene copolymers were then synthesized by Suzuki coupling reaction with 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborane-diyl)-9,9 -dioctyl fluorene, 2,7-dibromo-9,9-dioctyl fluorene and 2,7-dibromo-9,9-bis(perfluorohexylethyl propionate) fluorene as the monomers. The fluorinated fluorene copolymers were characterized and investigated via Fourier infrared spectroscopy (FTIR), hydrogen nuclear magnetic resonance spectroscopy (1HNMR), ultraviolet absorption spectroscopy (UV–vis), cyclic voltammetry (CV) and photoluminance spectroscopy (PL). Because of the long fluorine-containing alkyl side chain, the ultraviolet absorption peak of 9,9-bis(perfluorohexylethyl propionate) fluorene is blue-shifted compared with poly(9,9-dioctylfluorene)(PF8). The LUMO energy level increases and the energy band gap of copolymers widens. Due to the self-assembly of the long fluoroalkyl side chain, the photoluminance spectra of 9,9-bis(perfluorohexylethyl propionate) fluorene copolymers exhibit a new excimer emission peak at 550 nm. The photoluminance stabilities of the copolymers under irradiation and humid conditions are significantly improved due to protective effect from the long fluoroalkyl side chain. After being irradiated under 500 W iodine tungsten lamp or kept under 70% relative humid conditions, the 9,9-bis(perfluorohexylethyl propionate) fluorene copolymers showed much better photoluminance stability than that of poly(9,9-dioctylfluorene) (PF8). These show that introducing long fluoroalkyl side chain into conjugated polymer main chain is a promising strategy to improve environmental stability of devices based on organic conjugated polymers. 相似文献
13.
14.
以自制的9,9-双羟甲基芴(BHMF)和苯甲酰氯为原料,以三乙胺为吸收剂合成了9,9-双(苯甲酸甲酯基)芴,采用了红外光谱和核磁共振氢谱等分析测试手段对产品进行了结构表征并逐一归属。考察了原料配比、反应时间、反应温度及吸收剂用量等因素对9,9-双(苯甲酸甲酯基)芴收率的影响。实验结果表明,最佳工艺条件为:0.1 mol BHMF,n(BHMF)∶n(苯甲酰氯)=1.0∶3.0,三乙胺吸收剂为60 mL,反应温度10℃,反应时间4.0 h,在此条件下9,9-双(苯甲酸甲酯基)芴收率可达85.4%。 相似文献
15.
Three new hyperbranched polymers (P1-P3) were prepared by copolymerization of tribromoaryl moieties (triphenylamine, carbazole and fluorene moieties) with 9,9-dihexylfluorene-2,7-bis(trimethyleneborate) from “A2 + B3” approach based on Suzuki polycondensation reaction. They are soluble in common organic solvents, and exhibit good thermal stable luminescence. Interestingly, unlike most of fluorene-containing polymeric materials, P3 emits strong green light due to its special structure. Double-layer devices with configurations ITO/PEDOT/Polymer (50 nm)/TPBI(50 nm)/LiF(0.5 nm)/Al(80 nm) were fabricated and emitted blue or green light, with maximum luminance in the range of 25-142 cd/m2 and the current efficiency up to 0.18 cd/A. 相似文献
16.
17.
本文设计并合成了一种新型蒽衍生物蓝光材料2-叔丁基-9,10-二(9,9-二正丙基芴基)蒽.化合物中引入的柔性烷基链有效抑制了分子间的相互作用,使该化合物不易结晶,同时提高了化合物在有机溶剂中的溶解度.通过量子力学方法计算发现,化合物具有顺反两种稳定构型,分子的平面性差,能减弱分子间相互作用.化合物在二氯甲烷溶液中的最大荧光发射峰在443 nm,在环己烷溶液中测得荧光量子效率为0.78,固态薄膜的最大发射峰波长相对溶液有少量红移(450 nm).热失重和差热分析结果表明,该化合物具有较高的热稳定性,分解温度和玻璃化转变温度分别为365℃和126℃. 相似文献