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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
DOI:
10.1002/agt2.193
Authors:
Gianluigi
Albano
(Università di Pisa)
,
Marcin
Gorecki
(Institute of Organic Chemistry, Polish Academy of Sciences)
,
Tamas
Javorfi
(Diamond Light Source)
,
Rohanah
Hussain
(Diamond Light Source)
,
Giuliano
Siligardi
(Diamond Light Source)
,
Gennaro
Pescitelli
(Università di Pisa)
,
Lorenzo
Di Bari
(Università di Pisa)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Aggregate
, VOL 10
State:
Published (Approved)
Published:
March 2022
Diamond Proposal Number(s):
17621
Open Access
Abstract: 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-µm 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
Journal Keywords: benzo[1,2-b:4,5-b’]dithiophene; circular dichroism imaging; oligothiophenes; synchrotron radiation; thin films
Subject Areas:
Chemistry,
Physics,
Materials
Instruments:
B23-Circular Dichroism
Added On:
25/03/2022 22:47
Discipline Tags:
Surfaces
Physics
Physical Chemistry
Chemistry
Materials Science
interfaces and thin films
Technical Tags:
Spectroscopy
Circular Dichroism (CD)