本文選題：芘類衍生物 + 分子結(jié)構(gòu)�。� 參考：《南京郵電大學(xué)》2017年碩士論文

【摘要】：一系列具有特殊分子結(jié)構(gòu)的芘類衍生物被合成,進(jìn)而根據(jù)其分子結(jié)構(gòu)的差異,對其聚集形貌、光電性能做了詳細(xì)的對比分析,總結(jié)了材料分子結(jié)構(gòu)、聚集形貌和光電性能三者之間的影響因素。研究的具體內(nèi)容如下:1)合成了四種不同的芘-芴衍生物PFP1、PFP2、BP1和BP2,在PFP1和PFP2分子結(jié)構(gòu)中芴核的C9位存在著非共軛的芘基團(tuán),它導(dǎo)致了非共軛的芘基團(tuán)與芘-芴主鏈之間形成了π-π超共軛效應(yīng)。它使兩個共軛體系以非定域化的形式存在,并且它們之間可以發(fā)生電子的相互轉(zhuǎn)移。由于兩個電子云的非定域化作用,使得PFP1和PFP2分別與BP1和BP2相比具有較小的分子結(jié)構(gòu),從而使其表現(xiàn)出的相對較低相變溫度。由于PFP1和PFP2電子傳輸途徑的增多,分別相對于BP1和BP2其分子間作用力增強(qiáng),從而表現(xiàn)出更好的無定形特性;同時電子的易傳輸使得PFP1和PFP2具有更好的空穴注入能力,其相應(yīng)發(fā)光性能分別比BP1和BP2也更勝一籌。2)設(shè)計、合成了兩種具有相似結(jié)構(gòu)的化合物Py-4TrH和Py-4TrHE,兩者均是以芘基團(tuán)為核心、三并茚基團(tuán)為支鏈的樹枝狀分子結(jié)構(gòu);實驗中在兩種化合物分子結(jié)構(gòu)中引入的多個烷基鏈,有效地改善了它們在常見溶劑中的溶解性能。光譜性能測試表明它們分別為藍(lán)光、綠光材料,熒光發(fā)射峰的位置分別在468 nm和526 nm處。且它們具有較好的熱穩(wěn)定性。3)采用再沉降的聚集方法,使化合物Py-4TrH、Py-4Tr HE、PYT和PYET分子分別發(fā)生自聚,進(jìn)一步對其聚集形貌進(jìn)行SEM測試,以及對其薄膜狀態(tài)進(jìn)行AFM測試。在Py-4TrHE、PYET分子結(jié)構(gòu)內(nèi)由于炔基的存在,使分子內(nèi)空間位阻減小,導(dǎo)致分子中某些部分更容易發(fā)生相對的移動或轉(zhuǎn)動,為分子發(fā)生自組裝提供更多的結(jié)合位點,使得Py-4TrHE和PYET相對應(yīng)的聚集體更為均一、有序。
[Abstract]:A series of pyrene derivatives with special molecular structure were synthesized, and then the aggregation morphology and photoelectric properties of pyrene derivatives were compared and analyzed according to the differences of their molecular structures, and the molecular structures of the materials were summarized. The influence factors of aggregation morphology and optoelectronic properties. Four different pyrene-fluorene derivatives, PFP1, PFP2, BP1 and BP22, were synthesized. In the molecular structure of PFP1 and PFP2, there are unconjugated pyrene groups in the C 9 of fluorene nucleus. It leads to the 蟺-蟺 hyperconjugation effect between the unconjugated pyrene group and the pyrene-fluorene main chain. It allows two conjugate systems to exist in the form of delocalization, and electrons can be transferred between them. Because of the delocalization of two electron clouds, the molecular structure of PFP1 and PFP2 is smaller than that of BP1 and BP2, which makes them exhibit a relatively low phase transition temperature. Because of the increase of electron transport channels of PFP1 and PFP2, the intermolecular force of BP1 and BP2 increases respectively, which shows better amorphous characteristics, and the easy transport of electrons makes PFP1 and PFP2 have better hole injection ability. The corresponding luminescent properties were also superior to those of BP1 and BP2. Two compounds Py-4TrH and Py-4TrHEE with similar structures were synthesized. Both of them were dendrimer structures with pyrene as core and trindene as branched chain. Several alkyl chains were introduced into the molecular structure of two compounds, which improved their solubility in common solvents. The results show that they are blue and green, and the fluorescence emission peaks are at 468 nm and 526 nm, respectively. And they have good thermal stability. 3) by means of the method of resettling aggregation, the compounds Py-4TrHU Py-4Tr HEPYT and PYET molecules are self-polymerized respectively, and their aggregation morphology is further tested by SEM, and the film state is tested by AFM. In the molecular structure of Py-4TrHEHE-PYET, due to the presence of alkynyl group, the intramolecular steric hindrance decreases, which leads to the relative movement or rotation of some parts of the molecule, and provides more binding sites for the self-assembly of the molecule. So that the Py-4TrHE and PYET corresponding aggregates are more uniform and orderly.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O625.15;TN304.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 Peng-Xia Liang;Dong Wang;Zong-Cheng Miao;Zhao-Kui Jin;Huai Yang;Zhou Yang;;Spectral and self-assembly properties of a series of asymmetrical pyrene derivatives[J];Chinese Chemical Letters;2014年02期

，

本文編號：1855273