Tetrathiafulvalene(TTF), CAS 31366-25-3, molecular formula C6H4S4, is an organic sulfur compound formed by replacing the 2,2 '- position of fulvene with a sulfur atom. It was first synthesized by Wudl in 1970. In 1972, it was discovered that its chloride salt had high conductivity. The following year, its TCNQ salt was prepared, and it was found that the conductivity of the salt suddenly increased below room temperature, reaching 10 ^ 4 ohm ^ (-1) cm ^ (-1) at 60K, which is sufficient to be called an "organic metal". In 1979, it was further discovered that Bechgaard salt [TMTSF] 2X (X is PF6-, AsF6-) based on tetrathiofulvene was the first molecular superconductor prepared, which aroused great interest in this field. Over 10000 scientific publications discuss TTF and its derivatives. Although it appears to be a 14 π planar system, it lacks cyclic conjugation and therefore lacks aromaticity. It can be oxidized into free radical cations and double cations, both of which are thermodynamically stable and aromatic species.
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Chemical Formula |
C6H4S4 |
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Exact Mass |
204 |
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Molecular Weight |
204 |
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m/z |
204 (100.0%), 206 (9.0%), 206 (9.0%), 205 (6.5%), 205 (3.2%), 207 (1.2%), 208 (1.0%) |
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Elemental Analysis |
C, 35.27; H, 1.97; S, 62.76 |
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Tetrathiafulvalene(TTF) and its derivatives have special redox properties and excellent optical, electrical, and magnetic functions, and have been widely studied in material chemistry and supramolecular chemistry. The following is a detailed introduction to the specific applications of TTF:
Application of Materials Chemistry
1. Electrode modification and L-B membrane material
TTF and its derivatives can be used as electrode modification materials to modify the electrode surface through specific chemical reactions or physical adsorption, thereby changing the electrochemical properties of the electrode. This modified electrode has potential application value in fields such as electrochemical sensors, electrocatalysis, and energy storage. In addition, TTF can also be used to prepare L-B film materials, which have specific molecular arrangements and orientations and can be used to construct ultra-thin film materials with specific functions.
2. Nonlinear optical materials
Due to their unique electronic structure and optical properties, TTF and its derivatives can serve as nonlinear optical materials. This type of material will produce nonlinear optical effects under strong light irradiation, such as second harmonic generation, sum frequency generation, and difference frequency generation. These effects have broad application prospects in fields such as optical communication, optical information processing, and optical data storage.
3. Positive and negative ion sensors
TTF and its derivatives have sensitive selective responses to specific cations and anions, making them suitable as cation and anion sensors. This type of sensor has potential application value in fields such as environmental monitoring, biomedicine, and food safety. By designing specific TTF derivatives, high sensitivity and selectivity detection of specific ions can be achieved.
Application of Supramolecular Chemistry
1. Organic ferromagnetic material
One important application of TTF and its derivatives in supramolecular chemistry is as building blocks for organic ferromagnets. Organic materials with ferromagnetic properties can be prepared through specific molecular design and self-assembly processes. This type of material has potential application value in fields such as magnetic storage and magnetic sensors.
2. Coordination bifunctional compounds
By binding TTF with specific ligands, compounds with dual coordination functions can be prepared. These compounds have broad application prospects in catalysis, molecular recognition, drug delivery, and other fields. By adjusting the structure and properties of TTF and ligands, precise regulation of compound functions can be achieved.
Application of optoelectronic devices
1. Organic Light Emitting Diodes (OLEDs)
TTF and its derivatives have potential application value in the OLED field. Through specific molecular design and synthesis processes, TTF derivatives with excellent luminescent properties can be prepared. These derivatives can be used as materials for the light-emitting layer or hole transport layer of OLEDs, thereby improving the luminous efficiency and stability of OLEDs.
2. Organic solar cells
TTF and its derivatives can also be used for the preparation of organic solar cells. Through specific molecular design and synthesis processes, TTF derivatives with excellent photoelectric conversion properties can be prepared. These derivatives can be used as active layer or charge transport layer materials for solar cells, thereby improving the photoelectric conversion efficiency and stability of solar cells.
Biomedical Applications
1. Drug delivery
One important application of TTF and its derivatives in the biomedical field is as drug delivery carriers. Through specific molecular design and synthesis processes, TTF derivatives with specific targeting and biocompatibility can be prepared. These derivatives can serve as drug carriers to achieve precise delivery and release of drugs, thereby improving their efficacy and safety.
2. Biological imaging agents
TTF and its derivatives can also be used as biological imaging agents. Through specific molecular design and synthesis processes, TTF derivatives with excellent fluorescence properties can be prepared. These derivatives can serve as probes for biological imaging agents, used in fields such as cell imaging and tissue imaging. By observing the fluorescence signal changes of TTF derivatives, real-time monitoring and quantitative analysis of specific molecules in organisms can be achieved.
Catalytic applications
1. Organic synthesis catalyst
TTF and its derivatives have potential catalytic applications in the field of organic synthesis. Through specific molecular design and synthesis processes, TTF derivatives with excellent catalytic performance can be prepared. These derivatives can serve as catalysts for organic synthesis reactions, accelerating the rate of specific chemical reactions and improving reaction selectivity. By adjusting the structure and properties of TTF derivatives, precise control of catalytic performance can be achieved.
2. Photocatalytic hydrogen production and CO2 reduction
In recent years, tetrathiafulvalene has also made significant progress in the fields of photocatalytic hydrogen production and CO2 reduction. Through specific molecular design and synthesis processes, TTF derivatives with excellent photocatalytic performance can be prepared. These derivatives can serve as active components of photocatalysts to promote photocatalytic hydrogen production and CO2 reduction reactions. By adjusting the structure and properties of TTF derivatives, precise control of photocatalytic performance can be achieved. For example, binding TTF to specific electron acceptor units can generate catalysts with excellent charge transfer properties. This catalyst exhibits a faster charge transfer rate in the visible light range, and by further reducing the bandgap, it may achieve visible light response. This photocatalyst has potential application value in fields such as artificial photosynthesis, energy conversion, and storage.
Other applications
1. Molecular recognition and separation
Due to its unique structure and properties, TTF and its derivatives can also be used for molecular recognition and separation. Through specific molecular design and synthesis processes, TTF derivatives with specific recognition sites and selectivity can be prepared. These derivatives can interact specifically with specific molecules to achieve molecular recognition and separation. This method has broad application prospects in chemical analysis, environmental monitoring, biomedical and other fields.
2. Redox fluorescence switch
TTF and its derivatives can also serve as redox fluorescence switches. These compounds undergo changes in fluorescence properties during redox reactions, enabling real-time monitoring and quantitative analysis of specific redox processes. This redox fluorescence switch has potential application value in fields such as chemical sensing and biosensing.
Specific compounds and application examples
1. Tetrathiofulvalene calixarenes (TTF calixarenes)
Introducing TTF groups into the molecular structure of calixarenes can endow them with new properties and applications. TTF calixarenes have special electronic properties and reactivity, and can be used as ligands for metal complexes to participate in coordination chemistry reactions. In addition, TTF groups may also affect the electronic transport properties of cup-shaped aromatic molecules, making them potentially applicable in electronic devices. Through appropriate design, TTF calixarenes may also exhibit optoelectronic properties, which can be used for the preparation of optoelectronic devices. Due to its unique structure, TTF calixarenes may also undergo specific interactions with specific molecules for molecular recognition and separation. In addition, the introduction of TTF groups may also endow calixarenes with catalytic performance, making them catalysts for organic synthesis reactions. TTF calixarenes with biocompatibility may also be used in biomedical fields such as drug delivery, bioimaging agents, etc.
2. 2,3-dimethylthio-6-pyridyl-tetrathiafulvalene(DMT-TTF-py)
DMT-TTF py is a specific TTF derivative with a specific chemical structure and properties. By synthesizing and characterizing this compound, the electrochemical response of its interaction with hydrogen protons and its spectral response in specific solvents can be studied. In addition, metal complexes can be designed and synthesized using DMT-TTF py as a ligand, and their redox and coordination properties can be studied. This compound and its complexes have potential application value in fields such as electrochemistry, spectroscopy, catalysis, etc.
3. Pt@Zn-TPY-TTF CPG
Pt@Zn-TPY-TTF CPG is a TTF based coordination polymer gel material. By combining TTF with TPY derivatives to form tetragonal low molecular weight gelling agent (TPY-TTF LMWG), and then self-assembly with ZnII ions to form coordination polymer gel (CPG), catalysts with excellent photocatalytic performance can be obtained. This catalyst exhibits efficient hydrogen production and CO2 reduction activity under visible light drive. Through in situ infrared spectroscopy and density functional theory (DFT) studies, the mechanism by which CPG catalysts regulate charge transfer steps and CO2 reduction to CO/CH4 can be elucidated. This catalyst has potential application value in fields such as artificial photosynthesis, energy conversion, and storage.
Tetrathiafulvalene, as an organic compound with special structure and properties, has broad application prospects in materials chemistry, supramolecular chemistry, optoelectronic devices, biomedical, catalysis and other fields. Through specific molecular design and synthesis processes, TTF derivatives and their composite materials with excellent properties can be prepared. The application of these derivatives and composite materials in various fields will continuously promote technological progress and development in related fields. In the future, with the continuous deepening and expansion of research on TTF and its derivatives, more new application areas will be discovered and developed. Meanwhile, it is also necessary to pay attention to the environmental impact and safety issues of TTF and its derivatives to ensure their sustainable application in various fields.Tetrathiafulvalene, once a laboratory curiosity, has emerged as a cornerstone of organic electronics and functional materials. Its unique redox properties, structural tunability, and ability to form ordered assemblies have enabled breakthroughs in conductivity, energy storage, and sensing. As researchers continue to unlock TTF's potential through innovative synthesis and hybridization strategies, this humble sulfur compound is poised to redefine the boundaries of materials science in the 21st century. From molecular wires to smart sensors, TTF's legacy is a testament to the power of interdisciplinary innovation in transforming fundamental chemistry into transformative technologies.
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