3,5-diaminobenzoic acid hexyl ester 、 4-硝基苯甲酰氯 以n-hexyl[3,5-bis(4-nitrobenzoylamino)]benzoate was obtained (44.5 g, yield: 82%) in the same manner as in Example 1的产率得到n-Hexyl[3,5-bis(4-nitrobenzoylamino)]benzoate
参考文献:
名称:
Diaminobenzene derivative, polyimide obtained therefrom, and liquid-crystal alignment film
Diamine compounds, which in particular are useful as precursors for the production of liquid crystal alignment layers, represented by general formula (I), wherein A1 represents an organic group of 1 to 40 carbon atoms; A2 represents a hydrogen atom or an organic group of 1 to 40 carbon atoms.
[EN] PHOTOALIGNING MATERIALS<br/>[FR] MATÉRIAUX DE PHOTOALIGNEMENT
申请人:ROLIC AG
公开号:WO2013050121A1
公开(公告)日:2013-04-11
The present invention relates to polymer, homo- or copolymer or oligomer for the photoalignment of liquid crystals, especially for the planar orientation of liquid crystals, comprising a main chain and a side chain, wherein the side chain and/or main chain comprises a polar group, compositions thereof, and its use for optical and electro optical devices, especially liquid crystal devices (LCDs).
The present invention concerns functionalized photoreactive compounds of formula (I), that are particularly useful in materials for the alignment of liquid crystals. Due to the adjunction of an electron withdrawing group to specific molecular systems bearing an unsaturation directly attached to two unsaturated ring systems, exceptionally high photosensitivities, excellent alignment properties as well as good mechanical robustness could be achieved in materials comprising said functionalized photoreactive compounds of the invention.
The present invention provides a compound comprising a repeating unit of formula (I)
in which:
Arepresents a nitrogen atom, a carbon atom, a group -CR1- or an aromatic or alicyclic group, wherein R1 represents a hydrogen atom or lower alkyl,
Mrepresents a repeating monomer unit;
n1 to n3each independently represent 0 or an integer having a value of from 1 to 3, with the proviso that 1 < n1 + n2 + n3 < 4;
P1, P2, P3each independently represent a photoactive group; and
B1 to B4each independently represent a residue of general formula II
as well as photoactive polymers prepared from such compounds and the use of such compounds in the preparation of liquid crystal orientation layers and structured and unstructured electro-optical elements.