375856-41-0

Upstream product

• 100-52-7 benzaldehyde 
• 2836-04-6 m-dimethylaminoaniline 
• 16518-62-0 3-bromo-N,N-dimethylaniline 
• 100-46-9 benzylamine 
• 619-31-8 N,N-dimethyl-3-nitroaniline 

Downstream Products

• 871239-50-8 C₄₆H₄₂N₄O₄S₂ 
• 871239-49-5 C₄₆H₄₂N₄O₄S₂ 
• 871239-48-4 C₄₆H₄₂N₄O₄S₂ 
• 871239-57-5 1-benzyl-7-dimethylamino-4-hydroxy-1H-quinolin-2-one 

Relevant academic research and scientific papers

Nitrogen-containing element cationic chromophores and its preparation

To solve the problems caused by using rhodamine derivatives and 9-trimethylbenzyl-10-methylacridine ion that take S and Se as the bridge atoms as the photosensitive agents, the invention provides a novel nitrogen-containing cation chromophore and a preparation method thereof. The compound has the characteristics of long absorption wavelength, long excitation wavelength, high quantum yield and long exiting time of excited triplet state generated by absorbing photons, easy water-solubility, and incapability of coordinating with metal catalysts. The preparation method comprises the following steps: making m-bromoaniline derivatives carry out Ullmann C-N coupling reactions with excess primary amine in the presence of a CuI catalyst so as to obtain a reaction product A; making the reaction product A carry out Ullmann C-N coupling reactions with m-iodoaniline derivatives in the presence of KN(Si(CH3)3)2 so as to obtain a reaction product B; making the reaction product B carry out Bayer condensation reactions with benzaldehyde derivatives in the present of a ferric trichloride catalyst or a zinc dichloride catalyst to enclose the ring so as to obtain a reaction product C; and finally carrying out a dehydration treatment on the reaction product C with 2,3-dicyano-5,6-dichlorobenzoquinone (DDQ) so as to obtain the target product.

Fluorescent sensors for diamines

A series of seven diamine sensors was prepared using dimers of a quinolone aldehyde chromophore. Binding to six different diamine guests was explored by a combination of NMR, absorption and fluorescence spectroscopy. It was shown that the dimeric sensors bound the diamine guests by formation of a bis-iminium ion which produced large changes in the fluorescence of the quinolone core. Issues of selectivity between guests are discussed. The Royal Society of Chemistry 2005.