- Direct and Divergent Solid-Phase Synthesis of Azobenzene and Spiropyran Derivatives
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Here, we report a solid-phase approach to synthesize azobenzene and spiropyran derivatives. The divergent synthesis process requires no purification steps to obtain the desired product with a 28-55% yield, depending on the specific compound. For the spiropyran compounds, solid-phase resin cleavage is performed under mild conditions to minimize spiropyran ring opening. The solid-phase method enables the synthesis of a library of azobenzene and spiropyran derivatives without the need to develop purification strategies for each derivative.
- Kollarigowda, Ravichandran H.,Braun, Paul V.
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p. 4391 - 4397
(2021/04/02)
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- Linear double-branch azobenzene/graphene composite material and preparation method and application thereof
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The invention discloses a linear double-branch azobenzene/graphene composite material and a preparation method and application thereof. The linear double-branch azobenzene/graphene composite material is characterized in that linear double-branch azobenzene is grafted to single-layer graphene. The preparation method includes: performing diazotization on 4-aminobenzoic acid, allowing the processed 4-aminobenzoic acid to have reaction with aniline to generate azobenzene molecules, performing amino protection on the azobenzene molecules, and performing amidation on the azobenzene molecules and para amino azobenzene-4-sulfonic acid to obtain amino protected double-branch azobenzene; removing amino protection, and hybridizing and compositing the prepared double-branch azobenzene and reduced graphene oxide through diazotization to obtain the linear double-branch azobenzene/graphene composite material. The prepared double-branch azobenzene/graphene hybrid material has the advantages that the energy value and half-life period of the material are greatly improved as compared with those of azobenzene small molecules, the energy density of the material is stabilized at 158Wh/Kg, the half-life period of the material is prolonged to above 1000 hours, and the material is good in thermal stability and circulating performance and beneficial to solar heat storage.
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Paragraph 0034; 0035; 0039; 0043; 0047; 0051
(2017/08/29)
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- Fluorescent composite hydrogels of metal-organic frameworks and functionalized graphene oxide
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GO MOFs! Azobenzoic acid functionalized graphene (A-GO) can act as a structure-directing template that influences hydrogel formation together with metal-organic frameworks (MOFs). Zn2+ MOFs of pyridine derivatives work as framework linkers between the A-GO sheets (MOF-A-GO, see figure). MOF-A-GO exhibits a strong fluorescence enhancement upon gel formation. In addition, MOF-A-GO selectively recognizes trinitrotoluene. Copyright
- Lee, Ji Ha,Kang, Sunwoo,Jaworski, Justyn,Kwon, Ki-Young,Seo, Moo Lyong,Lee, Jin Yong,Jung, Jong Hwa
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supporting information; experimental part
p. 765 - 769
(2012/03/26)
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- AZO COMPOUND AND SALT THEREOF, AND DYE-CONTAINING POLARIZING FILM COMPRISING THE COMPOUND OR SALT
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Disclosed is an azo compound represented by the general formula (1) or a salt thereof: wherein R1 and R2 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxy group; and n represents 1 or 2. Also disclosed are a dye-containing polarizing film and a dye-containing polarizing plate, each of which comprises a polarizing film base material and the azo compound contained in the base material.
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Page/Page column 8-9
(2009/03/07)
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