ONE-DIMENSIONAL LADDER-TYPE COORDINATION POLYMERS (1D LCPS) BASED ON ORGANIC ELECTRONICS BUILDING BLOCKS
Abstract
This project aims to investigate one-dimensional ladder-type coordination polymers (1D LCPs) based on organic electronics (OE) building blocks. Instead of joining the OE moieties with rotatable C-C bonds, typical in semiconducting polymers, we are interested in bridging them with a metal (M) in a square planar geometry. In doing so, the planarity of the OE building blocks is locked in place, and the conjugation can be extended over the whole intrachain segment via the organic p – metal d coupling (? interactions). The resulting ladder-type polymers are expected to show strong delocalization and good charge carrier mobility. The target ligands are bithiophene (2T) and thienothiophene (TT), which also allow the comparison between rotatable C-C and fused ring systems. First, the ligands will be tetra-thiolated to obtain 2T4S and TT4S, which can be reacted with counter cation A+ and bridging metal ions M2+ to yield the target poly[A2(M-2T4S)] and poly[A2(M-TT4S)]. Various A and M species will be explored to determine the structure-property relationship. Because the coordination polymers typically display very low solubility, an innovative approach based on sacrificial, volatile co-ligands will be explored to process them into thin films. The expected outcomes include: the first realization of 1D LCPs based on OE building blocks, new knowledge on how to tune their properties by varying the counter cations and central metal atoms, and new knowledge on the processability of 1D LCPs. A minimum of three publications will be published, and one post-doctoral research associate will be trained. This research will open a new horizon for the development of metalloorganic semiconductors: processable coordination polymers with p-d conjugation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 20, 2023
- Source ID
- FA23862214082
Entities
People
- Pichaya Pattanasattayavong
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- Vidyasirimedhi Institute of Science and Technology