DK756 is essential in the creation of chiral nematic polymer films as well as optically transparent bilayer cholesteric liquid crystal (CLC) solid films capable of rejecting almost entirely ultraviolet (UV)-A radiation.
The basic information of DK756
DK756 CAS NO. 223572-88-1
1,4:3,6-Dianhydro-D-glucitol bis[4-[[4-[[[4-[(1-oxo-2-propenyl)oxy]butoxy]carbonyl]oxy] benzoyl]oxy]benzoate]
Synonym: LC756
Molecular Formula- C50H46O20
DK756, a chiral dopant with a high positive twisting power, also functions as a polymerizable chiral cross-linker due to its two acrylate groups. It can also be used as a reactive mesogen, LCD monomer, RM material, and electronic chemical.
What are the applications of DK756?
An optically transparent bilayer CLC solid film competent of almost entirely rejecting ultraviolet (UV)-A light was created utilizing a bilayer CLC film composed of double-handed CLC layers and UV-curing reactive mesogen mixtures (RMMs) doped with DK756 and S811(CAS NO. 87321-20-8).
Film thickness, as well as concentrations of S811 and DK756 in RMMs, were optimized to produce more than 95 % transparency (in the visible region) and more than 98 % UV blocking (in the UV-A area). This method offers a simple and dependable production technique that can be used in real-world applications including smart windows, spectacles, and lenses.
Expanding of CLCs can be done via photopolymerization of chiral polymers (DK756). The chirality of the LC mixture can be lowered by exposing it to UV light because the amount of unpolymerized chiral polymer is reduced. Furthermore, the pitch length will progressively rise throughout the photopolymerization procedure, allowing the polymerized DK756 to create polymer network structures to stabilize the changing pitch length.
It implies that the polymerization process can produce the gradient pitch, resulting in a broadening of the reflection spectrum. The right-handed chiral polymer (DK756) can adequately stabilize the right-handed CLC packed into an LC cell with an appropriate cell gap. The optimal reflection band, which has a bandwidth of around 257 nm, varies between 556 and 813 nm in experiments.
The broadening of the reflection band cannot be attained when left-handed CLCs are stabilized by a right-handed chiral polymer (DK756). The CLC structure of the case of pitch rising is substantially more uniform than the case of pitch decreasing throughout photopolymerization operations.
Moreover, polymerization of chiral nematic mixtures of the reactive mesogen RM257 (CAS NO.174063-87-7), the chiral dopant DK756, and the isotropic photoinitiator Irgacure 369 resulted in the formation of chiral nematic polymer films.
The characteristics of DK756
The liquid crystal monomer is usually in the column phase, and it has the following features:
(1) The molecule has a 4:1 length ratio and is a stick structure.
(2) the molecular terminals include polar or polarizable groups, allowing the molecules to remain in an ordered orientation.
(3) The molecule’s long axis is flexible and has some rigidity.
How to form the DK756
According to the classification standard of the China petroleum and chemical industry association, liquid crystal intermediates and liquid crystal monomers are produced by adding a variety of basic chemical raw materials for a variety of chemical reaction conversion and belong to the fine chemical industry in other specialized chemical products manufacturing industry.
Our company, Dakenchem is a reputable DK756 producer in China.
The related chemicals-
4-(3-(acryloyloxy)propoxy)benzoic acid CAS NO.245349-46-6
4-((6-(acryloyloxy)hexyl)oxy)benzoic acid CAS NO.83883-26-5
6-(4-hydroxyphenoxy)hexyl acrylate CAS NO.161841-12-9
(4-hydroxyphenyl)boronic acid CAS NO.71597-85-8
3-(4-bromophenyl)propanal CAS NO.80793-25-5
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