Spatially resolved chiroptical study of thin films of benzo[1,2-b:4,5-b′]dithiophene-based oligothiophenes by synchrotron radiation electronic circular dichroism imaging (SR-ECDi) technique

被引：20
作者：
Albano, Gianluigi [1 ,4 ]
Gorecki, Marcin [2 ]
Javorfi, Tamas [3 ]
Hussain, Rohanah [3 ]
Siligardi, Giuliano [3 ]
Pescitelli, Gennaro [1 ]
Di Bari, Lorenzo [1 ]
机构：
[1] Univ Pisa, Dipartimento Chim & Chim Ind, Via Giuseppe Moruzzi 13, I-56124 Pisa, Italy
[2] Polish Acad Sci, Inst Organ Chem, Warsaw, Poland
[3] Diamond Light Source Ltd, Chilton OX11 0DE, Didcot, England
[4] Univ Bari Aldo Moro, Dipartimento Chim, Via Edoardo Orabona 4, I-70126 Bari, Italy
来源：
AGGREGATE | 2022年 / 3卷 / 05期
关键词：
benzo[1,2-b:4,5-b ']dithiophene; circular dichroism imaging; oligothiophenes; synchrotron radiation; thin films; MUELLER MATRIX POLARIMETRY; OPTICAL-ACTIVITY; BEAMLINE B23; CHIRALITY; MOLECULES; MICROSCOPE;
D O I：
10.1002/agt2.193
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The study of the chiroptical properties of thin-film samples of two chiral benzo[1,2-b:4,5-b']dithiophene-based oligothiophenes with optoelectronic properties was carried out at Diamond B23 beamline using the synchrotron radiation electronic circular dichroism imaging (SR-ECDi) facility. The experimental results support the hypothesis that the non-reciprocal circularly polarized absorption observed in these materials is due to the combined linear dichroism and linear birefringence contributions. The mapping at 50-mu m spatial resolution revealed that several species coexist in the mesoscopic chiral domains likely due to different aggregated phases, which were identified in the films by SR-ECDi but could not be detected with benchtop ECD instruments.
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页数：10
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