Project A11: Bismuth(III)iodide as a 2D Material for Hybrid Compounds
Principle Investigator: Dr. Johanna Heine (Marburg, Dept. of Chemistry)
Summary
This project aims to establish BiI3 as a 2D
material and to synthesize hybrid compounds composed of organic species
and BiI3 layers in order to generate an organic-inorganic
interface. To achieve this, we choose two approaches.
In the first, we want to understand the surface properties of bulk
BiI3 single crystals, develop exfoliation techniques towards
two-dimensional BiI3 sheets, investigate their properties
and test whether organic species can be deposited on the exposed
BiI3 layers. This will be conducted in close collaboration
with projects A2 (Witte) and A4 (Gottfried/Schmid) for microstructural
and surface characterization, B3 (M Koch) for optical properties and B6
(Höfer/Wallauer) to establish the electronic structure of the resulting
materials.
In the second approach, we will synthesize and subsequently
characterize BiI3-intercalation compounds using different
intercalating agents such as halogen bond donors and amines. We aim to
explore several methods for intercalation, from
single-crystal-to-single-crystal transformation to direct synthesis. We
will characterize the obtained materials using single crystal and
powder diffraction techniques and establish their basic properties. For
selected compounds, we will investigate the newly generated
organic-inorganic interface in collaboration with projects B2
(Chatterjee) for optical properties and charge transfer phenomena and
A2 (Witte) and A4 (Gottfried/Schmid) to verify the microstructural
integrity of the material. Once we have gained a good understanding of
the intercalation process, we will collaborate with project A8
(Koert/Dürr) to synthesize modified intercalation agents, develop new
organic-inorganic interfaces and understand the trends and principles
governing these materials.
We will also explore the intercalation chemistry of well-known 2D
materials such as MoS2 to generate reference materials for
our BiI3 based compounds. Additionally, we will test whether
our intercalation compounds can be used to aid in the exfoliation
processes used in the first part of our project.
Project-Related Publications
- N. Heidary, A. Beyer, K. Volz, J. Heine Towards the liquid phase exfoliation of bismuth iodide Dalton Trans. 46, 8359 (2017).
- B. Wagner, N. Dehnhardt, M. Schmid, B. P. Klein, L. Ruppenthal, P. Müller, M. Zugermeier, J. M. Gottfried, S. Lippert, M.-U. Halbich, A. Rahimi-Iman, J. Heine Color Change Effect in an Organic–Inorganic Hybrid Material Based on a Porphyrin Diacid J. Phys. Chem. C 120, 28363 (2016).
- J. Heine A Step Closer to the Binary: The ∞1Bi6I20]2- Anion Dalton Trans. 44, 10069 (2015).