趙玥 周啟
摘 要:采用量子化學(xué)密度泛函理論(DFT),在B3LYP水平上使用6-31g(d)基組對四苯并四氮雜卟啉α-位、β-位、α和β位引入甲氧基(OMe),進(jìn)行結(jié)構(gòu)優(yōu)化.研究結(jié)果表明,α和β位同時(shí)引入取代基OMe時(shí),H2Pc-αβ-(OMe)16分子的鍵長鍵角變化較明顯,不同位置引入取代基對分子的紅外吸收有影響.
關(guān)鍵詞:四苯并氮雜卟啉;密度泛函理論;甲氧基取代
[中圖分類號]O641.4 ? [文獻(xiàn)標(biāo)志碼]A
Abstract:This paper adopts density functional theory in quantum chemistry,(DFT) B3LYP level,using 6-31g(d) basis set,to introduce the methoxy group(OMe) in the α-position or β-position and αβ-position of the phthalocyanine for optimizing structure.The results show that the bond length and bond angle of H2Pc-αβ-(OMe)16 molecule changed obviously when the molecular structure introduced the methoxy group(OMe) in the αβ-position.The substituents of the different positions on the molecular structure were introduced to influence the infrared absorption.
Key words:phthalocyanine;density functional theory;methoxyl substitutions
四苯并氮雜卟啉(酞菁)由四氮雜卟啉并上四個(gè)苯環(huán)組成,是芳香族大環(huán)有機(jī)化合物,其化學(xué)和物理性質(zhì)由取代基的位置和種類決定.[1-9]酞菁分子化合物的功能性與酞菁周圍取代基的相互作用密切相關(guān),研究不同位置引入取代基后酞菁化合物內(nèi)部相互作用的特性,可以更好地了解其結(jié)構(gòu)與功能性質(zhì)的相互關(guān)系.本實(shí)驗(yàn)在酞菁環(huán)外引入甲氧基(OMe)(在α位引入8個(gè)OMe生成H2Pc-α-(OMe)8,β位引入8個(gè)OMe生成H2Pc-β-(OMe)8,α和β位同時(shí)引入16個(gè)OMe生成H2Pc-αβ-(OMe)16)形成不同的酞菁化合物分子,對這些化合物的基態(tài)結(jié)構(gòu)、幾何參數(shù)及紅外光譜圖進(jìn)行研究,探討酞菁分子振動模式的內(nèi)在機(jī)理.
1 計(jì)算部分
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編輯:吳楠