?喃衍生物及其硼錯合物之液晶性質探討

NCU Institutional Repository > 理學院 > 化學研究所 > 博碩士論文 > Item 987654321/85674

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/85674

題名:	?喃衍生物及其硼錯合物之液晶性質探討
作者:	李庭安;Lee, Ting-An
貢獻者:	化學學系
關鍵詞:	?喃;液晶;二氟化硼;furan;Liquid crystal;boron difluoride
日期:	2021-07-21
上傳時間:	2021-12-07 11:14:04 (UTC+8)
出版者:	國立中央大學
摘要:	本研究以五員雜環?喃 (furan) 作為核心，以 α, β-二酮(α,β-diketonate) 連接外圍苯環結構之烷氧長碳鏈合成配位基 1a-d，並進而與 BF2 配位形成錯合物 1a-BF2-1d-BF2，以及合成?唑 (pyrazole) 衍生物 2a-d。由化合物 1d (n = 0) 單晶結構得知晶系為單斜晶系(monoclinic)，空間群為 P21/n，分子形狀為馬蹄型，且兩側苯環與雜環?喃之二面角分別為 16.582o 與 25.292o。所有的配位基1a-d 均為結晶相，而化合物 1d-BF2、 2a 與 2d 具有 SmA 及 SmC 的液晶相性質。從螢光放光光譜中，可得知硼錯合物 1a-BF2-1d-BF2 (n = 12) 的螢光放光範圍為 max = 520-624 nm，放光為綠光至紅光範圍;而?唑衍生物 2a-d (n = 12) 的螢光放光範圍為 max = 355-360 nm，放光為紫外光範圍。此外，可發現硼錯合物之最大放光波長皆比配位基紅移，而在固態螢光光譜中，化合物 1d-BF2 (n = 12) 所測得之放光波長為 max = 618 nm，在溶液態所測得之放光波長為 max = 549 nm，可得知化合物 1d-BF2 (n = 12) 在固態所測得之放光波長較溶液態紅位移，此為 J-aggregate 堆疊所導致。;In this work, four new families of borondifluoride complexes 1a-BF2-1d-BF2 and four new families of pyrazole derivatives 2a-d derived from , -ketonate furans 1a-d were reported and their mesomorphic properties investigated. One single crystallographic structure of mesogenic complex 1d (n = 0) was determined X-ray analysis; it crystallizes in a monoclinic space group P21/n. The crystal was shaped as a horsesho. The dihedral angles of the furan ring and the benzene ring on both side are 16.582o and 25.292o respectively. All ligands 1a-b were crystals, however, all bis(BF2) complexes 1d-BF2, 2a and 2d formed SmA or/and SmC phases. The optical property of the bis(BF2)2 complexes 1a-BF2-1d-BF2 (n = 12) was related with their molecular structures, and they emitted green-to-red emissions at max = 520-624 nm in CH2Cl2. Pyrazole derivatives 2a-d (n = 12) emitted ultraviolet emissions at max = 355-360 nm in CH2Cl2. The maximum luminescent emission of the compounds 1a-BF2-1d-BF2 (n = 12) were red-shifted compared to the compounds 1a-d. Furthermore, the maximum luminescent emission of bis(BF2) complex 1d-BF2 (n = 12) in the solid state (max = 618 nm) was red-shifted compared to in the solution (max = 549 nm) because of the J-aggregate.
顯示於類別:	[化學研究所] 博碩士論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	52	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....