申请人:SEMICONDUCTOR ENERGY LABORATORY CO., LTD. 가부시키가이샤 한도오따이 에네루기 켄큐쇼(519980839048)
公开号:KR20150015418A
公开(公告)日:2015-02-10
본 발명은 다양한 액정 표시 장치에 적용하는 것이 가능한 신규 액정 조성물용 재료를 제공한다. 일반식(G2)으로 나타내어지는 신규 아이소소바이드 유도체를 제공한다. 일반식(G2)에서, Ar, Ar, Ar, 및 Ar는 각각 독립적으로, 치환 또는 비치환된 탄소수 6~12의 아릴렌기, 치환 또는 비치환된 탄소수 3~12의 사이클로알킬렌기, 또는 치환 또는 비치환된 탄소수 4~12의 사이클로알케닐렌기를 나타내고, l, k, m, 및 n은 각각 독립적으로 0~3을 나타낸다. 또한, R 및 R은 각각 독립적으로 산소, 단결합, 또는 치환 또는 비치환된 탄소수 1~12의 알킬렌기를 나타낸다. R 및 R는 각각 독립적으로 수소, 산소, 치환 또는 비치환된 탄소수 1~12의 알킬기, 또는 치환 또는 비치환된 탄소수 1~12의 알콕시기를 나타낸다.
Cation and leaving group effects in isosorbide alkylation under microwave in phase transfer catalysis
作者:Saber Chatti、Michel Bortolussi、André Loupy
DOI:10.1016/s0040-4020(01)00318-0
日期:2001.5
leaving group effects and influence of catalyst underphasetransfercatalysis conditions using concomitant microwave irradiation during di-n-octylation of isosorbide. A small amount of solvent was necessary to control temperature and to provide good yields within a few minutes. The yields were dramatically improved when compared to conventional heating under the same conditions, in spite of similar profiles
Novel photo-polymerizable chiral hydrogen-bonded self-assembled complexes: Preparation, characterization and the utilization as a thermal switching reflective color film
作者:Fengjin Chen、Jinbao Guo、Zhijian Qu、Jie Wei
DOI:10.1039/c0jm03810e
日期:——
In this study, novel photopolymerizable chiral hydrogen-bonded self-assembled complexes (PCHSCs) were fabricated, which were derived from photopolymerizable 4-(6-acryloyloxyhexyloxy) benzoic acid (AHBA, proton donor) and chiral pyridine derivatives (proton acceptor). Their structures were characterized by fourier transform infrared (FT-IR) and the proton nuclear magnetic resonance (1H-NMR) spectoscopy. The thermal stability, phase behaviors and helical twisted power (HTP) characteristics of the PCHSC were investigated by measuring the variable-temperature FT-IR spectrum, differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and the Cano wedge. The results demonstrate that all the PCHSCs have good thermal stability within a temperature range, and the pitch length of all the cells containing the PCHSCs increases with increasing temperature, which is due to the fact that the HTP values of all the PCHSCs decrease with an increase of temperature. What's more, the introduction of AHBA leads to chiral enhancement of the PCHSCs. Based on the above results, a polymer stabilized cholesteric liquid crystals (PSCLCs) composite with the above PCHSCs was prepared and the thermal-optical characteristics of the PSCLCs film were investigated. The results confirm that the reflective wavelength of the PSCLCs film before and after irradiation can be thermally switched to reflect green and red color from the initial state reflecting a blue/green color with the temperature increasing from 30 °C to 75 °C. On the basis of this mechanism, the novel material in this study can be used as optical/photonic paper, optical sensors and LCs displays, etc.
[EN] USE OF COMPOUNDS RESULTING FROM A SUGAR POLYOL OR FROM A DEHYDROGENATED SUGAR POLYOL DERIVATIVE AS A UV-SCREENING AGENT; ANTISUN COMPOSITIONS CONTAINING SAME; AND NOVEL COMPOUNDS<br/>[FR] UTILISATION DES COMPOSÉS OBTENUS À PARTIR D'UN POLYOL DE TYPE SUCRE OU D'UN DÉRIVÉ DÉSHYDROGÉNÉ DE POLYOL DE TYPE SUCRE À TITRE D'AGENT DE FILTRATION UV ; COMPOSITIONS ANTISOLAIRES LES CONTENANT ; ET NOUVEAUX COMPOSÉS
申请人:OREAL
公开号:WO2012010554A1
公开(公告)日:2012-01-26
The present invention relates to the cosmetic use, as an agent for screening out UV radiation, of compounds resulting from a sugar polyol or from a dehydrogenated sugar polyol derivative of formula (I) or (II) in which A1 and A2 denote UV-screening groups; Z1 and Z2 a sugar polyol group or a dehydrogenated sugar polyol derivative such that the product of formula (I) has in its structure from 1 to 4 -OH groups remaining and optionally from 1 to 2 -COOH groups. The present invention also relates to a composition comprising, in a cosmetically acceptable medium, at least one compound of formula (I) or (II). The present invention also relates to novel compounds resulting from a sugar polyol or from a dehydrogenated sugar polyol derivative of formula (I) or (II).