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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 DOI Help

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 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

Aggregate - 2022 - Albano - Spatially resolved chiroptical study of thin films of benzo 1 2%E2%80%90b 4 5%E2%80%90b dithiophene%E2%80%90based.pdf

Discipline Tags:

Surfaces Physics Physical Chemistry Chemistry Materials Science interfaces and thin films

Technical Tags:

Spectroscopy Circular Dichroism (CD)