Pyrrolo[3,4-C]pyrrole-1,4-dione, 2,5-dihydro-3,6-di-2-thienyl-

The full Chinese name of this compound is 2,5-dihydro-3,6-di (thiophene-2-yl) pyrrole [3,4-c] pyrrole-1,4-dione. Its chemical structure is analyzed as follows:
1. ** Core skeleton **: Pyrrole [3,4-c] pyrrole-1,4-dione constitutes the core part of the whole compound. The structure of pyrrole means that two pyrrole rings are fused together in a specific [3,4-c] way, and two carbonyl groups (-CO-) are connected at positions 1 and 4, forming a diketone structure. This core structure endows the compound with certain stability and specific electron cloud distribution, which affects its physical and chemical properties and reactivity.
2. ** Substituent **: At the position of 2,5-dihydrogen, that is, the 2 and 5 positions of the core skeleton, it is in the state of hydrogen atom substitution. These two hydrogen atoms have a certain regulation effect on the electron cloud density distribution of the whole molecule, and also affect the interaction between molecules, such as the formation of hydrogen bonds. At the 3,6 positions, two thiophene-2-groups are connected respectively. The thiophene group is an aromatic five-membered heterocyclic ring, and its electron cloud structure interacts with the core structure of pyrrole-pyrrolidinone, which makes the whole molecule have unique photoelectric properties. The sulfur atom on the thiophene ring has lone pair electrons, which can participate in the electron conjugation system, thereby changing the degree of electron delocalization of the molecule, affecting the absorption spectrum and fluorescence emission properties of the compound. The symmetric distribution of two thiophene-2-groups at the 3,6 positions also determines the spatial configuration and symmetry of the molecule to a certain extent, which affects its accumulation in crystals and aggregation in solution.
In summary, the chemical structure of 2,5-dihydro-3,6-bis (thiophene-2-yl) pyrrole [3,4-c] pyrrole-1,4-dione consists of a specific fused core pyrrole-pyrrolidinone skeleton and a hydrogen atom and a thiophenyl substituent at a specific location. These structural features interact to endow the compound with unique physicochemical properties.

This is a substance of pyrrole [3,4-c] pyrrole-1,4-dione, 2,5-dihydro-3,6-di-2-thiophenyl, which has many physical properties.
Looking at its properties, under normal temperature and pressure, this compound is a stable solid, with a powdery appearance and a light yellow to light brown color, which varies depending on purity and preparation process.
When it comes to melting point, it has been precisely determined to be in a specific temperature range, which is the critical temperature for its conversion from solid to liquid state. This temperature is critical for the identification and purification of this compound. < Br >
In terms of solubility, it exhibits specific solubility properties in common organic solvents. In some polar organic solvents, such as dichloromethane, N, N-dimethylformamide, it has a certain solubility and can form a homogeneous and dispersed solution; however, in non-polar solvents, such as n-hexane, the solubility is very little, or only suspended.
Again, its density can be obtained through accurate experimental measurement. This value reflects the mass of the substance per unit volume. In chemical production and preparation, it is of great significance to calculate the dosage and volume occupied.
In addition, the stability of this compound is worth mentioning. Under normal environmental conditions, it can maintain a stable chemical structure; in case of high temperature, strong oxidizing agent or specific catalytic conditions, its structure may change, triggering chemical reactions and generating new substances.
In terms of optical properties, the compound may have a specific absorption spectrum. In the ultraviolet-visible spectral region, it has a unique absorption peak, and its concentration and purity can be accurately determined by spectral analysis technology. These physical properties are an important basis for application and research in many fields such as organic synthesis and materials science.

This is a chemical substance called 2,5-dihydro-3,6-di-2-thiophenylpyrrolido [3,4-c] pyrrole-1,4-dione. However, this substance is not recorded in "Tiangong Kaiwu", because "Tiangong Kaiwu" was written in the Ming Dynasty, when the discipline of chemistry had not yet developed to the extent that it could recognize and record such complex organic compounds.
"Tiangong Kaiwu" was written by Ying Xing in the Ming Dynasty. It is a comprehensive work on agricultural and handicraft production. The book details many process technologies of that time, such as farming, textiles, ceramics, smelting, etc. Its focus is to record the practical production technology and experience at that time to help people's livelihood and economic development.
And 2,5-dihydro-3,6-di-2-thiophenylpyrrole [3,4-c] pyrrole-1,4-dione such organic compounds can only be recognized and studied with the help of modern chemical analysis techniques and theories. Its synthesis, properties and applications are within the scope of modern organic chemistry. This compound may have potential applications in modern fields such as materials science and organic electronics, such as the preparation of organic optoelectronic materials, etc., but it is not covered by Tiangong Kaiwu.

The method for preparing 2,5-dihydro-3,6-di-2-thiophenylpyrrolido [3,4-c] pyrrole-1,4-dione is not detailed in the ancient book "Tiangong Kaiji", but it can follow the general principles of organic synthesis.
First, thiophene is used as the starting material, and the halogenated reaction is carried out to introduce halogen atoms at specific positions of thiophene. This step requires the selection of mild reaction conditions, so that the halogen can be precisely substituted without damaging the structure of the thiophene ring. Halogenated thiophenes can be obtained by using a halogenating agent, such as bromine, in a suitable solvent, such as dichloromethane, at low temperature and catalyzed by a catalyst. < Br >
After the halogenated thiophene is obtained, it is reacted with an active intermediate containing pyrrolio [3,4-c] pyrrole-1,4-dione structure. This active intermediate may be prepared by a series of reactions such as condensation and cyclization of suitable nitrogen-containing and carbonyl-containing compounds. When the two are reacted, a matching base and solvent, such as potassium carbonate as the base and N, N-dimethylformamide as the solvent, should be selected to promote the smooth progress of the nucleophilic substitution reaction.
During the reaction process, the reaction process needs to be closely monitored. The ratio of raw materials to products can be observed by thin layer chromatography. After the reaction reaches the expected level, the post-treatment is carried out. The product is extracted with an organic solvent, and then separated by column chromatography to obtain a pure 2,5-dihydro-3,6-di-2-thienylpyrrole [3,4-c] pyrrole-1,4-dione.
Throughout the synthesis, the reaction conditions of each step need to be carefully controlled. The purity of raw materials, reaction temperature, time, and reagent dosage are all related to the yield and purity of the product, and must not be slack.

Pyrrolo [3,4-c] pyrrole-1,4-dione, 2,5-dihydro-3,6-di-2-thienyl (hereinafter referred to as the compound) has its uses in various fields.
In the field of materials science, this compound has emerged. Due to its special molecular structure and electronic properties, it can be used as an organic semiconductor material. For example, in the preparation of organic field effect transistors (OFETs), the compound can build an active layer. Organic field effect transistors are widely used in flexible electronic devices, such as flexible displays, wearable electronic devices, etc. The active layer that this compound participates in the construction can improve the transistor carrier mobility, making electron transport more efficient, thereby improving the device performance, making the flexible display screen image display clearer and the data processing of wearable devices faster.
In the field of optoelectronics, this compound also has important functions. It can be used as an organic photovoltaic material in solar cells. In the operation of solar cells, it can effectively absorb light energy and convert it into electricity. With its excellent light absorption properties and charge transfer ability, it can improve the photoelectric conversion efficiency of solar cells. Today, the energy problem is severe, and it is of great significance to improve the efficiency of solar cells. The potential of this compound in this regard should not be underestimated.
In the field of biomedicine, although the application is still in the exploratory stage, the prospect is promising. Due to its unique chemical structure, it may have certain biological activity. Researchers speculate that it may be used as a drug carrier, using its structural characteristics to wrap drug molecules to achieve drug targeted delivery, improve drug efficacy, and reduce side effects on normal tissues. Or it may be applied to biological imaging technology with its optical properties to assist medical diagnosis and make disease detection more accurate.