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    • 3. 发明授权
    • Multi-armed chromophores with very large two-photon absorption cross-sections
    • 具有非常大的双光子吸收横截面的多臂发色团
    • US06300502B1
    • 2001-10-09
    • US09731549
    • 2000-12-08
    • Ramamurthi KannanBruce A. ReinhardtLoon-Seng Tan
    • Ramamurthi KannanBruce A. ReinhardtLoon-Seng Tan
    • C07D27766
    • C07D207/456
    • Provided are chromophores with very large two-photon absorption cross-sections. One group of these chromophores has the formula: (T—Q)n—N—Phm wherein Q is a single bond or 1,4-phenylene, Ph is a phenyl group, n has a value of 1-3 and m has a value of 3−n, and wherein T is wherein R1 and R2 are alkyl groups having 1 to 20 carbon atoms, provided that when Q is a single bond, the value of n is 2 or 3. Another group of these chromophores has the formula: (T—Q)n—G—Phm wherein T is as defined above, Q is a single bond or 1,4-phenylene, Ph is a phenyl group, n has a value of 1-4 and m has a value of 4−n, and wherein G is a 4-arm core unit. Yet another group of these chromophores has the formula: (T—Q)n—G—Phm wherein T is as described previously, Q is a single bond or 1,4-phenylene, Ph is a phenyl group, n has a value of 1-6 and m has a value of 6−n, and wherein G is a 6-arm core unit.
    • 提供了具有非常大的双光子吸收横截面的发色团。 一组这些发色团具有下式:其中Q为单键或1,4-亚苯基,Ph为苯基,n为1-3,m为3-n的值,其中T为 R1和R2是具有1至20个碳原子的烷基,条件是当Q是单键时,n的值为2或3.这些发色团的另一组具有下式:其中T如上所定义,Q是 单键或1,4-亚苯基,Ph为苯基,n为1-4,m为4-n的值,G为4-臂核心单元。另一组这些发色团 具有下式:其中T如前所述,Q是单键或1,4-亚苯基,Ph是苯基,n的值为1-6,m的值为6-n,其中G 是一个6臂的核心单元。
    • 7. 发明授权
    • Method of synthesis of thermoplastic aromatic benzoxazole polymers
    • 热塑性芳族苯并唑混合物的合成方法
    • US4931532A
    • 1990-06-05
    • US241645
    • 1988-09-08
    • Bruce A. Reinhardt
    • Bruce A. Reinhardt
    • C08G73/22
    • C08G73/22
    • There is provided an aromatic benzoxazole polymer having repeating units of the formula ##STR1## wherein Ar is ##STR2## wherein R is an alkyl group having 8 to 12 carbon atoms. The polymers of this invention are prepared by the polycondensation of 4,4'-hexafluoroisopropylidene bis(2-aminophenol) with a dicarboxylic acid selected from the group consisting of isophthalic acid, terephthalic acid, 2,5-pyridine dicarboxylic acid, 2,6-pyridine dicarboxylic acid and a 2,5-bis(alkoxy) terephthalic acid of the formula ##STR3## wherein R is an alkyl group having 8 to 12 carbon atoms, in a suitable reaction medium containing a suitable dehydrating agent.
    • 提供具有下式的重复单元的芳族苯并恶唑聚合物,其中Ar是具有8至12个碳原子的烷基。 本发明的聚合物通过4,4'-六氟异亚丙基双(2-氨基苯酚)与选自间苯二甲酸,对苯二甲酸,2,5-吡啶二羧酸,2,6 - 吡啶二羧酸和式为“IMAGE”的2,5-双(烷氧基)对苯二甲酸,其中R为含有8至12个碳原子的烷基,在合适的含有合适的脱水剂的反应介质中。