Tetrathiofulvalene (TTF) is used as a precursor material for the synthesis of electron donor charge transfer materials, and is used to prepare molecular conductors in semiconductor materials. As a new type of polysulfide conjugate, TTF molecular conductors increase the two-dimensional size and have better electrical conductivity. So far, there are many types of TTF molecular conductors. From the first-generation TTF-type electron donor to the third-generation TTF-type electron donor, its structural diversity endows it with rich optoelectronic properties, and it has been widely used in electronic devices, biosensors and other fields.
Figure 1. The chemical structure of TTF
- Molecular-electronic devices: TTF molecular conductors are fiberized by electrochemical vapor deposition or immersion, and can be made into electromagnetic device-based nanowires or thin film materials. Such electronic materials are called molecular-electronic device materials. Circuits made of this material are smaller and lighter than existing microelectronic circuits.
- Molecular-based ferromagnetic materials: Molecular-based ferromagnets have the advantages of light weight, small specific gravity, and can be processed and cut. The metal-coordinated TTF precursor material has the charge transfer between the donor and the acceptor in the linear chain, which can stabilize the ferromagnetism and form a stable ferromagnetic material.
- Bioelectrode: In the fields of biology and medicine, it is often necessary to measure certain physiological parameters of the organism, such as measuring the glucose content in the blood in a dynamic-steady state method. This measuring device will use an enzyme electrode. In this enzyme electrode, TTF materials can be used as a mediator between the enzyme redox center and the electrode, and have the advantages of low water solubility, close adhesion to the electrode, high chemical stability, and high efficiency of heterogeneous electron transfer.
- Conductive polymer: As a new type of functional material, conductive polymer not only has high conductivity, but also has good processability and high mechanical strength. By combining the advantages of high conductivity and stability of TTF compounds with the advantages of easy processing of polymers, a class of functional materials with stable conductive state can be prepared.
- Narcis Avarvari. Heteroatom Bridged Tetrathiafulvalenes [J]. Eur. J. Inorganic Chemistry, 2020, 18, 1706-1719.