NEW PARADIGMS FOR ENERGY EFFICIENT MATERIALS
CONDUCTING AND SUPERCONDUCTING MOFS
PHOTONIC MOFS FOR LIGHT-TO-LIGHT CONVERSION AND ALL-OPTICAL DEVICES
MULTIFUNCTIONAL PHOTO-MECHANO-ELECTROACTIVE MOFS
The cofacially arranged Py2TTF moieties of (a) 1, (b) 2 and (c) 3 experience an unprecedented double [2 + 2] photocyclisation reaction. The view down the c-axis of (d) 1, (e) 2 and (f) 3. The two independent nets have been highlighted in orange and blue. The coloured spheres represent C (black), N (light blue), O (red), S (yellow) and Cd (violet). Hydrogen atoms and solvent molecules in each of the frameworks have been omitted for clarity.
The aforementioned MOF is an example of a "cofacial" structure where the ligands are arranged in a "double-up" fashion. We have found that this structural feature gives rise to interesting phenomena including through-space Intervalence Charge Transfer (IVCT) which represented, at the time, a new mechanism for charge transfer in MOFs.
We have also shown that these interactions can be exploited to produce a "super-reductant" state of some MOFs. The latter are "high-energy" states that we have shown can be used, for example, as photocathodes to reduce carbon dioxide.
RESEARCH HIGHLIGHTS FROM ELECTROACTIVE & RADICAL MOFS (2010-2021)
Our team's research has made inroads into elucidating fundamental charge transfer processes within extended 2D and 3D systems including MOFs and Porous Organic Polymers (POPs). In addition to a number of presentations on this topic, highlights of our research achievements include:
Quantifications of through-space donor-acceptor charge transfer and Intervalence Charge Transfer in a MOF, the latter representing a new mechanism for charge transfer in a MOF. These findings demonstrated a fundamental link between the low energy absorption bands in MOFs (known as Intervalence Charge Transfer bands) and their conductivities, representing an important strategy for achieving long-range conductivity in nanoporous materials.