共查询到18条相似文献,搜索用时 100 毫秒
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新型荧光材料的合成与表征 总被引:1,自引:0,他引:1
以二水合-[N,N,-双(2-苯胺基)乙二酰胺]合镍和邻菲咯啉(phen)为原料合成了一种新型荧光材料,并用元素分析、红外、紫外、核磁共振等进行了表征,通过对其荧光性能的研究,证明该化合物是一种较好的新型荧光材料. 相似文献
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以三苯胺、苯肼和芴酮为原料,通过甲酰化、亲核加成反应合成了4-(N,N-二苯基)氨基苯甲醛苯腙(PABPD)、4-(N,N-二苯基)氨基苯甲醛-3,5-二硝基苯腙(PABNPD)和芴酮苯腙(FPD)三种苯腙类有机光电材料。采用1 HNMR、FTIR和元素分析对该系列化合物的结构进行了表征,并考察了该类化合物的紫外-可见吸收光谱、荧光发射光谱、电化学性质及热稳定性质。实验结果表明:三种目标化合物的最大紫外吸收峰分别出现在374、422和395nm,且PABPD可在445nm附近发出较强的蓝色荧光,PABNPD可在543nm附近出现较强的绿色荧光,FPD可在465nm附近出现较弱的蓝色荧光;TG分析结果表明三种目标化合物具有较好的热稳定性;采用循环伏安法测得三种目标化合物的电离势分别为4.91、5.15和5.04eV,说明PABPD相对于PABNPD和FPD具有更为优良的空穴传输性能,因此PABPD是一种具有潜在应用前景的空穴传输材料和蓝光发光材料。 相似文献
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以三苯胺、芴酮等为原料,合成了一种新型星形三苯胺衍生物三(4-亚芴基肼基-5-亚甲基-2-噻吩基)苯胺(TFMTA)。用FTIR、1 HNMR、元素分析对TFMTA的结构进行了表征,并考察了其光物理性能。结果表明:TFMTA的薄膜显示较强的红色荧光;且具有明显的聚集诱导发光(Aggregation-induced emission,AIE)性能;其电离势(5.75eV)与正电极(ITO)的功函数(4.8eV)相匹配,可有效降低空穴注入的能垒,有利于空穴的传输;TFMTA的热分解温度是355℃,具有良好的热稳定性。 相似文献
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1,8-萘酰亚胺类聚合荧光材料的合成及光学性能 总被引:1,自引:0,他引:1
以-4溴-1,8-萘二甲酸酐、二乙烯三胺(DETA)及三聚氯氰(CNC)为原料,经酰胺化、亲核取代反应合成了一种荧光单体,通过傅里叶变换红外光谱对其进行结构表征,并使其与丙烯酰胺按照一定比例聚合,得到一种能溶于水的聚合荧光材料。考察了荧光单体及聚合物的紫外可见吸收和荧光光谱,研究表明,聚合物的Δσ(3964 cm-1)... 相似文献
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Eun‐Bum Cho Dmytro O. Volkov Igor Sokolov 《Small (Weinheim an der Bergstrasse, Germany)》2010,6(20):2314-2319
The first successful approach to synthesizing ultrabright fluorescent mesoporous silica nanoparticles is reported. Fluorescent dye is physically entrapped inside nanochannels of a silica matrix created during templated sol–gel self‐assembly. The problem of dye leakage from open channels is solved by incorporation of hydrophobic groups in the silica matrix. This makes the approach compatible with virtually any dye that can withstand the synthesis. The method is demonstrated using the dye Rhodamine 6G. The obtained 40‐nm silica particles are about 30 times brighter than 30‐nm coated water‐soluble quantum dots. The particles are substantially more photostable than the encapsulated organic dye itself. 相似文献
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High‐Performance Fluorescent Organic Light‐Emitting Diodes Utilizing an Asymmetric Anthracene Derivative as an Electron‐Transporting Material
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Xiaozeng Song Minghan Cai Zhengyang Bin Tianyu Huang Lian Duan 《Advanced materials (Deerfield Beach, Fla.)》2018,30(26)
Fluorescent organic light‐emitting diodes with thermally activated delayed fluorescent sensitizers (TSF‐OLEDs) have aroused wide attention, the power efficiencies of which, however, are limited by the mutual exclusion of high electron‐transport mobility and large triplet energy of electron‐transporting materials (ETMs). Here, an asymmetric anthracene derivative with electronic properties manipulated by different side groups is developed as an ETM to promote TSF‐OLED performances. Multiple intermolecular interactions are observed, leading to a kind of “cable‐like packing” in the crystal and favoring the simultaneous realization of high electron‐transporting mobility and good exciton‐confinement ability, albeit the low triplet energy of the ETM. The optimized TSF‐OLEDs exhibit a record‐high maximum external quantum efficiency/power efficiency of 24.6%/76.0 lm W?1, which remain 23.8%/69.0 lm W?1 at a high luminance of even 5000 cd m?2 with an extremely low operation voltage of 3.14 V. This work opens a new paradigm for designing ETMs and also paves the way toward practical application of TSF‐OLEDs. 相似文献
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Xiao Han Khalil T. Hassan Alan Harvey Dejan Kulijer Adrian Oila Michael R. C. Hunt Lidija Šiller 《Advanced materials (Deerfield Beach, Fla.)》2018,30(23)
Aerogels are the least dense and most porous materials known to man, with potential applications from lightweight superinsulators to smart energy materials. To date their use has been seriously hampered by their synthesis methods, which are laborious and expensive. Taking inspiration from the life cycle of the damselfly, a novel ambient pressure‐drying approach is demonstrated in which instead of employing low‐surface‐tension organic solvents to prevent pore collapse during drying, sodium bicarbonate solution is used to generate pore‐supporting carbon dioxide in situ, significantly reducing energy, time, and cost in aerogel production. The generic applicability of this readily scalable new approach is demonstrated through the production of granules, monoliths, and layered solids with a number of precursor materials. 相似文献
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在EA基质中,合成了铽-对氨基苯甲酸配合物荧光剂,红外光谱的分析表明,配合物的吸收峰被EA(EA为双酚A-环氧丙烯酸酯)基质掩盖,表现为EA的特征吸收;荧光激发光谱、荧光发射光谱的研究表明,在EA基质中铽-对氨基苯甲酸配合物已经形成,并且表现出强的铽离子的特征荧光,即发出强的绿色荧光。由此荧光剂制备的光固化荧光防伪油墨在紫外光照射下能发出强的绿色荧光,经固化后的荧光强度明显低于固化前的荧光强度,并讨论了荧光猝灭机理。 相似文献
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以甲基乙烯基硅橡胶为基体,氧化铝为导热填料制备了一种高导热绝缘包覆母排材料,并对其力学性能、热导率、形貌和介电性能进行了测定。研究表明,随着氧化铝含量的增加,导热性能和力学性能相应提高,介电损耗升高,介电强度下降;小粒径填充的导热材料性能比大粒径填充的导热材料性能好;硅烷偶联剂及表面处理方式对导热材料性能有一定的影响;混杂粒径填充能适当提高导热材料的导热性能。 相似文献