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    • 22. 发明授权
    • Luminescent organic-inorganic perovskites with a divalent rare earth
metal halide framework
    • 发光有机 - 无机钙钛矿与二价稀土金属卤化物框架
    • US5882548A
    • 1999-03-16
    • US852894
    • 1997-05-08
    • Kangning LiangDavid Brian Mitzi
    • Kangning LiangDavid Brian Mitzi
    • C07C211/63C07C211/65C07F5/00C07F7/22C07F7/24C07F7/30C09K11/06H01L51/50H05B33/12H05B33/14C07C291/00
    • C09K11/06C07C211/65C07F5/003H01L51/001H01L51/0089
    • There is disclosed herein novel organic-inorganic layered perovskites of the general formula A.sub.2 MX.sub.4 where A is an organic ammonium cation, M is a divalent rare earth metal and X is a halogen. These compounds can be made by a low temperature (about 100.degree.-160.degree. C.) solid state reaction between the organic ammonium salt with the appropriate hydrogen halide and MX.sub.2 where M is a divalent rare earth metal and X is a halogen). A specific example is (C.sub.4 H.sub.9 NH.sub.3).sub.2 EuI.sub.4 which has been made through a reaction at about 140.degree.-160 C. between C.sub.4 H.sub.9 NH.sub.2. HI and EuI.sub.2. This new compound produces intense blue photoluminescence at room temperature, with a peak wavelength of 460 nm and a fairly narrow peak width (FWHM=24 nm). In addition to the simple aliphatic ammonium cations of the form C.sub.n H.sub.2n+1 NH.sub.3.sup.+, e.g., propylammonium (C.sub.3 H.sub.7 NH.sub.3) and butylammonium (C.sub.4 H.sub.9 NH.sub.3), a wide range of organic cations including those based on aliphatic amines, simple aromatic amines and more complex organic cations will substitute into the "A" sites of the current family of novel organic-inorganic perovskites. There is also disclosed a novel perovskite of the general formula AMX.sub.3, CH.sub.3 NH.sub.3 EuI.sub.3, having a photoluminescence peak at 448 nm. Both families of compounds are expected to be useful in devices such as organic/inorganic light emitting diodes.
    • 公开了通式A2MX4的新型有机 - 无机层状钙钛矿,其中A为有机铵阳离子,M为二价稀土金属,X为卤素。 这些化合物可以通过有机铵盐与合适的卤化氢和MX2(其中M是二价稀土金属,X是卤素)的低温(约100-116℃)固态反应来制备。 一个具体实例是(C4H9NH3)2EuI4,它们是通过C4H9NH2之间约140-160℃的反应制成的。 HI和EuI2。 这种新化合物在室温下产生强烈的蓝色光致发光,峰值波长为460nm,峰宽相当窄(FWHM = 24nm)。 除了CnH2n + 1NH3 +形式的简单的脂族铵阳离子,例如丙基铵(C 3 H 7 NH 3)和丁基铵(C 4 H 9 NH 3)外,包括基于脂族胺,简单芳香胺和更复杂的有机阳离子的有机阳离子范围广泛,将取代 进入目前新型有机 - 无机钙钛矿家族的“A”场。 还公开了在448nm处具有光致发光峰的通式为AMX3,CH3NH3Eu3的新型钙钛矿。 预期这两种化合物族可用于诸如有机/无机发光二极管的器件中。
    • 25. 发明授权
    • Catalyst for preparing methacrylic acid
    • 用于制备甲基丙烯酸的催化剂
    • US5681790A
    • 1997-10-28
    • US565712
    • 1995-11-30
    • Young Chul KimKi Hwa LeeEun Hee Jin
    • Young Chul KimKi Hwa LeeEun Hee Jin
    • B01J31/36B01J27/199B01J31/02C07B61/00C07C51/235C07C57/055C07C211/65B01J31/00
    • B01J23/002B01J27/199B01J31/0239B01J31/0254C07C211/65B01J2231/70B01J2231/76B01J2523/00
    • This invention relates to a novel catalyst for preparing methacrylic acid by gas phase oxidation of methacrolein obtained by gas phase catalytic oxidation of isobutylene or t-butanol. The catalyst is represented by the formula: P.sub.a Mo.sub.11 V.sub.b Du.sub.c X.sub.d Q.sub.e Z.sub.f O.sub.g wherein X is at least one of potassium, rubium, cessium, and thallium; Z is at least one of lead, antimony, chromium, iron, bismuth, cerium, and zinc; Q is at least one of organic quaternary ammonium cations consisting of ##STR1## in which R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently selected from the group consisting of C.sub.1 -C.sub.5 alkyl or C.sub.1 -C.sub.5 substituted alkyl having functional groups; a is a number from 0.8 to 1.6; b is a number from 0.6 to 2; c is a number from 0.1 to 0.8; d is a number from 0.7 to 2.2; e is a number from 0.01 to 0.1; f is a number from 0 to 0.5; and g is a number of oxygens required to satisfy the valence requirements of the other elements present.
    • 本发明涉及一种用于通过气相氧化异丁烯或异丁烯通过气相催化氧化获得的甲基丙烯醛来制备甲基丙烯酸的新型催化剂。 该催化剂由下式表示:其中X是钾,铷,铯和铊中的至少一种:PaMo11VbDucXdQeZfOg; Z是铅,锑,铬,铁,铋,铈和锌中的至少一种; Q是由以下组成的至少一种有机季铵阳离子:其中R,R 1,R 2,R 3和R 4各自独立地选自具有官能团的C 1 -C 5烷基或C 1 -C 5取代的烷基; a是从0.8到1.6的数字; b是从0.6到2的数字; c为0.1〜0.8的数; d是从0.7到2.2的数字; e为0.01〜0.1的数; f是从0到0.5的数字; 并且g是满足其它元素的化合价要求所需的数量的氧。