摘要:
A compound represented by the following Formula (1) is useful as an electron transport material of an organic EL device, and an organic EL device comprising the compound in the electron transport layer is long in life, and low in drive voltage: wherein G is an n-valent link, n is an integer of 2 to 4; R1 to R4 are each independently hydrogen, a monovalent group, or a free valency bonded with G, and R5 to R8 are each independently hydrogen or a monovalent group, and one of R1 to R4 is a free valency bonded with G; and n groups of 2,3′-bipyridyl may be the same or different with each other.
摘要翻译:由下式(1)表示的化合物可用作有机EL器件的电子传输材料,并且包含电子传输层中的化合物的有机EL器件寿命长,驱动电压低:其中G为 n价连接,n为2〜4的整数, R 1〜R 4各自独立地为氢,一价基团或与G键合的自由价,R 5〜R 8各自独立地为氢或一价基团,R 1〜R 4中的一个为与G键合的自由价; 并且n个2,3'-联吡啶基可以彼此相同或不同。
摘要:
A compound represented by the following Formula (1) is useful as an electron transport material of an organic EL device, and an organic EL device comprising the compound in the electron transport layer is long in life, and low in drive voltage: wherein G is an n-valent link, n is an integer of 2 to 4; R1 to R4 are each independently hydrogen, a monovalent group, or a free valency bonded with G, and R5 to R8 are each independently hydrogen or a monovalent group, and one of R1 to R4 is a free valency bonded with G; and n groups of 2,3′-bipyridyl may be the same or different with each other.
摘要翻译:由下式(1)表示的化合物可用作有机EL器件的电子传输材料,并且包含电子传输层中的化合物的有机EL器件寿命长,驱动电压低:其中G为 n价连接,n为2〜4的整数, R 1〜R 4各自独立地为氢,一价基团或与G键合的自由价,R 5〜R 8各自独立地为氢或一价基团,R 1〜R 4中的一个为与G键合的自由价; 并且n个2,3'-联吡啶基可以彼此相同或不同。
摘要:
A compound represented by the following Formula (1) is useful as an electron transport material of an organic EL device, and an organic EL device comprising the compound in the electron transport layer is long in life, and low in drive voltage: wherein G is an n-valent link, n is an integer of 2 to 4; R1 to R4 are each independently hydrogen, a monovalent group, or a free valency bonded with G, and R5 to R8 are each independently hydrogen or a monovalent group, and one of R1 to R4 is a free valency bonded with G; and n groups of 2,3′-bipyridyl may be the same or different with each other.
摘要翻译:由下式(1)表示的化合物可用作有机EL器件的电子传输材料,并且包含电子传输层中的化合物的有机EL器件寿命长,驱动电压低:其中G为 n价连接,n为2〜4的整数, R 1〜R 4各自独立地为氢,一价基团或与G键合的自由价,R 5〜R 8各自独立地为氢或一价基团,R 1〜R 4中的一个为与G键合的自由价; 并且n个2,3'-联吡啶基可以彼此相同或不同。
摘要:
A compound represented by the following Formula (1) is useful as an electron transport material of an organic EL device, and an organic EL device comprising the compound in the electron transport layer is long in life, and low in drive voltage: wherein G is an n-valent link, n is an integer of 2 to 4; R1 to R4 are each independently hydrogen, a monovalent group, or a free valency bonded with G, and R5 to R8 are each independently hydrogen or a monovalent group, and one of R1 to R4 is a free valency bonded with G; and n groups of 2,3′-bipyridyl may be the same or different with each other.
摘要翻译:由下式(1)表示的化合物可用作有机EL器件的电子传输材料,并且包含电子传输层中的化合物的有机EL器件寿命长,驱动电压低:其中G为 n价连接,n为2〜4的整数, R 1〜R 4各自独立地为氢,一价基团或与G键合的自由价,R 5〜R 8各自独立地为氢或一价基团,R 1〜R 4中的一个为与G键合的自由价; 并且n个2,3'-联吡啶基可以彼此相同或不同。
摘要:
Provided is a benzofluorene compound which exhibits excellent performances when applied to an organic electroluminescent device.In the benzofluorene compound, a central five-membered ring in a benzofluorene skeleton is substituted with aryl, and a benzene ring condensed to the five-membered ring is substituted with aryl, diarylamino and the like.
摘要:
A phosphorescent device with high brightness and a long usable life including at least an emitting layer situated between a pair of electrodes and at least one hole blocking layer in direct contact with the emitting layer, wherein the phosphorescent device employs as the hole blocking layer, a compound which can be used as a blue luminescent host material.
摘要:
A process for the production of a high stereoregular polypropylene wherein(a) an isotactic pentad (m m m m) is 0.950 to 0.995,(b) a syndiotactic pentad (r r r r) is 0 to 0.01,(c) a different bond due to 2,1- and 1,3-insertions of propylene monomer is 0 to 0.3 mol %,(d) an absence of a terminal double bond is confirmed,(e) a weight average molecular weight (Mw) is 50,000 to 1,000,000 and(f) a ratio (Mw/Mn) of the weight average molecular weight (Mw) to a number average molecular weight (Mn) is 1.5 to 3.8, (a) to (d) being determined from .sup.13 C NMR spectra, comprising polymerizing propylene in the presence of hydrogen using a catalyst comprising a chiral transition metal compound and an aluminoxane, the transition metal compound being represented by the formula of Q(C.sub.5 H.sub.4-m R.sup.1.sub.m) (C.sub.5 H.sub.4-n R.sup.2.sub.n)MXY wherein (C.sub.5 H.sub.4-m R.sup.1.sub.m) and (C.sub.5 H.sub.4-n R.sup.2.sub.n) represent a substituted cyclopentadienyl group; m and n are an integer of 1 to 3; R.sup.1 and R.sup.2 may be the same or different and each represents an alkyl group of 1 to 20 carbons; Q is a group capable of crosslinking (C.sub.5 H.sub.4-m R.sup.1.sub.m) and (C.sub.5 H.sub.4-n R.sup.2.sub.n) and represents a divalent, hydrocarbyl radical, an unsubstituted silylene group or a hydrocarbyl-substituted silylene group; M represents a transition metal selected from the group consisting of titanium, zirconium, and hafnium; X and Y may be the same or different and each represents a hydrogen, a halogen or a hydrocarbyl radical, and wherein said polymerization is performed by a slurry polymerization using an aliphatic hydrocarbon as a solvent or by a bulk polymerization using propylene as a solvent.
摘要翻译:一种制备高立构规则聚丙烯的方法,其中(a)全同立构五单元组(mmmm)为0.950-0.995,(b)间同立构五单元组(rrrr)为0至0.01,(c)由于2,1 - 和丙烯单体的1,3-插入为0〜0.3摩尔%,(d)不存在末端双键,(e)重均分子量(Mw)为50,000〜1,000,000,(f)a 重均分子量(Mw)与数均分子量(Mn)之比(Mw / Mn)为1.5至3.8,(a)至(d)由13 C NMR谱确定,包括在存在下聚合丙烯 使用包含手性过渡金属化合物和铝氧烷的催化剂的氢,所述过渡金属化合物由下式Q(C5H4-mR1m)(C5H4-nR2n)MXY表示,其中(C5H4-mR1m)和(C5H4-nR2n)表示 取代的环戊二烯基; m和n为1〜3的整数, R 1和R 2可以相同或不同,各自表示1〜20个碳的烷基; Q是能够交联的基团(C5H4-mR1m)和(C5H4-nR2n),代表二价烃基,未取代的亚甲硅烷基或烃基取代的亚甲硅烷基; M表示选自钛,锆和铪的过渡金属; X和Y可以相同或不同,各自表示氢,卤素或烃基,并且其中所述聚合通过使用脂族烃作为溶剂的淤浆聚合或通过使用丙烯作为溶剂的本体聚合进行。
摘要:
There are provided propylene-ethylene copolymers from which there are made molded articles having excellent heat resistance and films having both low temperature heat-sealing characteristics and stiffness, processes for the production thereof and molded articles. The propylene-ethylene copolymers contain 0.01-15 mol % of an ethylene unit and are characterized by that in the chain structure determined by NMR, triad (PEP), triad (EEE) and a ratio (N.sub..alpha..beta.) of all .alpha., .beta.-methylene carbons to all propylene units are in the specified range, a weight average molecular weight is 50,000-1,500,000 and a molecular weight distribution (Mw/Mn) is 1.2-3.8. The copolymers can be produced by copolymerizing ethylene and propylene in the presence of a catalyst in which the specified chiral transition metal compound (metallocene) and aluminoxane are combined.
摘要:
An olefin (co)polymer composition comprising, as major components, (a) 0.01 to 5 parts by weight of an olefin (co)polymer having an intrinsic viscosity [.eta..sub.a ] as measured in 135.degree. C. tetralin of 15 to 100 dl/g and (b) 100 parts by weight of an olefin (co)polymer obtained by using a metallocene catalyst and having an intrinsic viscosity [.eta..sub.b ] as measured in 135.degree. C. tetralin of 0.2 to 10 dl/g. When polyethylene having a high degree of polymerization is produced before a so-called metallocene catalyst is used to polymerize, e.g., propylene in the presence of the polyethylene as a component of a catalyst composition, a polypropylene composition having a high melt tension and a high crystallization temperature is produced.
摘要:
A polypropylene composition comprising 20 to 95% by weight of a stereoregular polypropylene characterized by the specified physical properties determined from .sup.13 C NMR spectra and 5 to 80% by weight of an .alpha.-olefin copolymer comprising 10 to 90% by weight of an .alpha.-olefin and 10 to 90% by weight of at least one of other .alpha.-olefins. The polypropylene composition demonstrates good balance of rigidity and impact resistance, high heat resistance and high toughness, when used as molding materials.
摘要翻译:一种聚丙烯组合物,其包含20至95重量%的立构规整聚丙烯,其特征在于由13 C NMR谱确定的特定物理性质和5至80重量%的包含10至90重量%的α-烯烃的α-烯烃共聚物 和10至90重量%的至少一种其它α-烯烃。 当用作成型材料时,聚丙烯组合物表现出良好的刚性和耐冲击性的平衡,高耐热性和高韧性。