New Dsd Acid - Optical Properties Of The Triazine Fluorescent Brighteners

DSD acid-triazinyl type fluorescent brighteners are widely used in many industry fields such as textile, synthetic fibre, plastic, paper manufaceure, synthetic detergent and so on because of their excellent properties and moderate price. The conventional product are VBL, BBU and CXT. The domestic study of this type fluorescent brighteners laid strong emphasis on technical amelioration and industrialisation. The breed and top-grade product is less, the type is all-purpose and lack marker rivalrousness.Contrapose the problum existent domenstic of this type fluorescent brighteners,basing on the conventional product VBL, using cyanuric chloride and4,4'-aminostilbene-2,2'-disulfonic acid (DSD acid) as main materials, 14 kind ofsingle DSD acid-riazinyl type fluorescent brighteners are synthesized using variantamine compounds replacing the chlorine of triazine rings. The new synthetic route isused contrasting to the traditional method. First cyanuric chloride reacts with onearomatic amine. Then the second nucleophilic substitution occurs by adding DSD asid.Aliphatic amino are added and the third nucleophilic substitution proceeds. After that14 single DSD acid-triazinyl type flurescent brighteners and contrastive product VBLare obtained. The otherness of photophysical and photochenmical between newcompounds and VBL in aqueous solution is tested. It is established that ultravioletabsorption, fluorescent emission performance of the great mass of new singleproducts were increased. But all product had obvious photoinduced isomerzationphenomena. The lightfastness of some new single product is better than conventionalproduct VBL as well as a few product show lower lightfastness.The enhancive efficiency by complex product is hotspot and emphasis of fluorescent brighteners research. Some product have already been successfully excogitated or put into production in a few foreign companies, but few in domestic research. First prepaired complex product using direct mixing in this paper. Chose 8 single fluorescent brighteners above which have better UV absorbance propeities and divide into 2 team basing on aromatic amine substitution. Then 12 complex product are prepaired in proportion with 1:1 by two single fluorescent btighteners, and the photophysical and photochemical properties were investigated. It was established that the ultraviolet absorption, fluorescent emission performance of complexed types fluorescent brighteners are higher, and their lightfastness are increased. The reason of increasing the lightfastness is that the complex products after illumination are still have the ability of the enhancive efficiency.About enhancive efficiency using chemic react, using DSD acid as matrix group still, only replacing single aliphatic amine with two mixed aliphatic amino by the portion of 1:1 in the process of third nucleophilic substitution, the else 12 reactive complex compounds which containing two symmetrical and one asymmetrical derivatives are synthesized. The otherness of photophysical and photochemical properties between these 12 reactive complex compounds and others single or direct complex compounds are observed. It established that the ultraviolet absorption and fluorescent emission performance of those 12 reactive complex compounds were higher, but lower lightfastness due to the exist of lightfasrless assymmetrical type.Series of single or complex DSD acid-triazinyl types fluorescent brighteners were synthesized. The ultraviolet absorption and fluorescent emission performance of the great mass of products is better, and the occurrence of these fluorescent brighteners fill the blank of demestic and abroad. Meanwhile, the development of good performance product provide technical or raw material support for FBs industry and its downstream industries dimestic and abroad.