Photophysical and Electrochemical Properties of Push-PullOligo(ferrocenyl-phenyleneethynylene)s: Supramolecular Orders inMolecular Films

被引：1

作者：

Turlakov, Gleb ^{[1
]}

Arias, Eduardo ^{[1
]}

Moggio, Ivana ^{[1
]}

Rodriguez, Geraldina ^{[1
]}

Ziolo, Ronald F. ^{[1
]}

Rodriguez-Fernandez, Oliverio S. ^{[1
]}

Mikhaylov, Alexander ^{[2
]}

Uudsemaa, Merle ^{[3
]}

Cooper, Thomas ^{[4
]}

Rebane, Aleksander ^{[2
,3
]}

机构：

[1] Ctr Invest Quim Aplicada CIQA, Saltillo 25294, Coahuila, Mexico

[2] Montana State Univ, Phys Dept, Bozeman, MT 59717 USA

[3] NICPB, EE-12618 Tallinn, Estonia

[4] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA

来源：

LANGMUIR | 2022年 / 38卷 / 13期

关键词：

AUXILIARY BASIS-SETS; ELECTRONIC-PROPERTIES; STRUCTURAL-CHARACTERIZATION; PHOTOPHYSICAL PROPERTIES; CONJUGATED MOLECULES; FERROCENE; TRANSITION; DERIVATIVES; PARAMETERS;

D O I：

10.1021/acs.langmuir.2c00121

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the optoelectronic properties of a series of unsymmetrical pi-conjugated phenyleneethynylenemacromolecules bearing ferrocene (Fc) as the electron-donor group (D), (benzyl) benzoate (Bz) or benzoic acid (Ac) as theelectron attractor group (A) and connected through 2,5-di(alcoxy) phenyleneethynylene(s) (nPE) withn=1,2,3as pi-conjugatedbridges. In the series, by increasing the distance between the electron-attracting and electron-donor groups, the push-pull effectdecreases. The intramolecular charge transfer (D ->pi -> A) was evaluated by static and dynamic spectroscopy, electrochemistry,and density functional theory (DFT) theoretical calculations. The longest oligomer Fc3PEBz formed the best optical qualityfilms. Astudy at the atomic level by scanning tunneling microscopy (STM) revealed that the molecules self-assemble on highly orderedpyrolytic graphite (HOPG) in domains with a short-range order. Films are mesoporous and the molecules arrange in a lamellar-likepattern, with an edge-on conformation with respect to HOPG, where the conjugated backbones lie parallel to the surface. Twodifferent assemblies were identified in the monoatomicfilm, which depends on the ferrocene-ferrocene or benzyl-benzylinteractions.

引用

页码：4077 / 4089

页数：13