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
Authors:
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.Keywords
This publication has 64 references indexed in Scilit:
- Quantitative Determination of Organic Semiconductor Microstructure from the Molecular to Device ScaleChemical Reviews, 2012
- Circular Dichroism Probed by Two-Photon Fluorescence Microscopy in Enantiopure Chiral Polyfluorene Thin FilmsJournal of the American Chemical Society, 2012
- Structure—Property relationships for exciton transfer in conjugated polymersJournal of Polymer Science Part B: Polymer Physics, 2011
- Measuring circular dichroism in a capillary cell using the b23 synchrotron radiation CD beamline at diamond light sourceChirality, 2010
- Preparation and characterization of helical self-assembled nanofibersChemical Society Reviews, 2008
- Optical Bandgaps of π‐Conjugated Organic Materials at the Polymer Limit: Experiment and TheoryAdvanced Materials, 2007
- Interchain Interactions in Organic π-Conjugated Materials: Impact on Electronic Structure, Optical Response, and Charge TransportAdvanced Materials, 2001
- On the Problems of CD Spectropolarimeters. II: Artifacts in CD SpectrometersApplied Spectroscopy, 1985
- Circular dichroism measurements. I. Calibration of a circular dichroism spectrometerReview of Scientific Instruments, 1985
- A circular dichroism microspectrophotometerBiopolymers, 1982