CAS：26239-55-4| The Application of ADA in Nanomaterials

Product Name：ADA
CAS：26239-55-4
Molecular Formula：C6H10N2O5
Article No.：    Y0040
Structural Formula：

Product Introduction
ADA is a yellow to orange red crystalline powder with dual effects of bleaching and oxidation. ADA is mainly used as a fast processing agent for flour, as well as a desulfurizer for water gas and semi water gas in the production of synthetic ammonia, a dye intermediate, and a biological buffer. In addition, ADA can also be used in the field of semiconductor nanomaterials technology.
Application of ADA
Semiconductor quantum dots are an important fluorescent nanomaterial with the advantages of wide absorption spectrum, narrow emission spectrum, and high quantum yield. Due to its excellent physical, chemical, and optical properties, quantum dots are widely used in fields such as biological imaging, biosensors, QLEDs, and quantum dot solar cells.
Since the discovery of QLED in 1994, the device efficiency of QLED has increased from 0.1% to over 20%. Based on the fact that quantum dots are composed of inorganic nanocrystals and surface ligands, the fluorescence intensity of quantum dots largely depends on their surface ligands. The interaction between surface ligands and the external environment usually leads to the detachment or oxidation of ligands, which in turn leads to a decrease or quenching of the fluorescence intensity of quantum dots. At present, the stability of quantum dots has become an important limiting factor for their industrial applications. Designing quantum dot nanomaterials with good electrical and optical properties has become an important bottleneck limiting the application of quantum dot luminescent displays. Therefore, the CN112280025A patent has developed a preparation method for highly stable quantum dot hybrid nanostructures, with the specific steps as follows:
(1) Coating an inorganic shell with a porous structure on the surface of quantum dots;
(2) Amino ligand modification was applied to the pores of inorganic shells, and carboxyl ligand modification was applied to single-walled carbon nanotubes to prepare quantum dot hybrid nanostructures with amino modification and single-walled carbon nanotubes with carboxyl modification, respectively;
(3) Mixing quantum dot hybrid nanostructures with amino groups and single-walled carbon nanotubes with carboxyl groups for condensation reaction, introducing and fixing single-walled carbon nanotubes into the pores of the inorganic shell layer on the surface of quantum dots.
The reagents used for modifying inorganic shell pore channels with amino ligands are oxygen-containing amino compounds, cycloalkylamines, aromatic monoamines and their derivatives, aromatic polyamines and their derivatives, amine salts or amide compounds, such as N- (2-acetylamino)-iminodiacetic acid, aminoacetonitrile bisulfate, N, N-dimethylamino-2-chloropropane hydrochloride, 4-aminobenzamidine dihydrochloride, N-[3- (aminomethyl) benzyl] carbamate tert butyl ester, Benzyl carbamate, p-aminodiethylaniline sulfate, etc.
The highly stable quantum dot hybrid nanostructures provided by the present invention are: quantum dots, inorganic porous shells coated on the outer side of the quantum dots, and single-walled carbon nanotubes filled in the pores of the inorganic porous shells from the inside out; The inorganic porous shell initially isolates quantum dots from the external environment such as water and oxygen, improving their chemical and environmental stability. The inorganic porous shell pores on the outer side of carbon nanotubes and quantum dots are connected by peptide bonds, forming a tightly bound nano hybrid structure; This structure effectively improves the environmental tolerance of fluorescent quantum dots, thereby increasing their service life and lifespan.

References
CN112280025A A highly stable quantum dot hybrid nanostructure, QLED device, and its preparation method