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Mapping the chiroptical properties of local domains in thin films of chiral silicon phthalocyanines by CD imaging

DOI: 10.3390/molecules25246048 DOI Help

Authors: Dora-Maria Rasadean (University of Bath) , Tiberiu-Marius Gianga (University of Bath; Diamond Light Source) , Tamas Javorfi (Diamond Light Source) , Rohanah Hussain (Diamond Light Source) , Giuliano Siligardi (Diamond Light Source) , G. Dan Pantos (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Molecules , VOL 25

State: Published (Approved)
Published: December 2020
Diamond Proposal Number(s): 23955 , 20441 , 26447

Open Access Open Access

Abstract: The first example of uniformly chiral thin films of silicon phthalocyanines (SiPcs) are reported. The local domains of the films are mapped using circular dichroism (CD) imaging (CDi) technique available at the Diamond B23 beamline. The CDi allowed us to increase the spatial resolution up to 525× when compared with benchtop spectrometers. The results indicate formation on-surface of chiral and stable supramolecular assemblies with homogenous distribution. Chemical functionalization and solvent choice for deposition allow controllable chiroptical properties to be obtained. The method and technique reported in this work could be applied to prepare and characterize a wide variety of chiral thin films.

Journal Keywords: chiral thin films; phthalocyanines; synchrotron radiation; circular dichroism; imaging

Diamond Keywords: Optoelectronics

Subject Areas: Technique Development, Materials, Chemistry


Instruments: B23-Circular Dichroism

Documents:
molecules-25-06048-v2.pdf

Discipline Tags:

Organic Chemistry Technique Development - Chemistry Material Sciences Technique Development - Material Sciences Physics Electronics Surfaces interfaces and thin films Chemistry

Technical Tags:

Spectroscopy Circular Dichroism (CD)