• Title/Summary/Keyword: Click reaction

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Synthesis of Diblock Codendrimer by Double Click Chemistry

  • Lee, Jae Wook;Han, Seung Choul;Ji, Won Ho;Jin, Sung-Ho;Kim, Ji Hyeon
    • Bulletin of the Korean Chemical Society
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    • v.33 no.12
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    • pp.4103-4108
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    • 2012
  • Efficient double click methods for the synthesis of diblock codendrimers were developed. The synthetic strategy involved the sequential click reactions between an alkyne and an azide. The short core building block, 1,4-diazidobutane, was chosen to serve as the azide functionalities for dendrimer growth via click reactions with the alkyne-functionalized PAMAM dendrons as hydrophilic dendron and alkyne-functionalized Fr$\acute{e}$chet-type dendrons as hydrophobic dendron. The structure of diblock codendrimers was confirmed by $^1H$ and $^{13}C$ NMR spectroscopy, IR spectroscopy, mass spectrometry, and GPC analysis.

A Hedonic Model Effects for Consumer-oriented Retargeting Advertising Based on Internet of Things

  • Kim, Bo-Ram;Yoon, Yong-Ik;Chung, Man-Soo
    • Journal of the Korea Society of Computer and Information
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    • v.22 no.2
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    • pp.75-80
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    • 2017
  • In this study, we developed a Hedonic Model for Retargeting Advertising Based on Consumer-centerd IoT space for offering useful, interest, and interactive information to consumer. And most existing relative researches about Internet of Things but, this paper focusing on the Type of information, humor, and interactive and analyze the attitude and clicks intention to Retargeting Advertising Based on Consumer-centerd Internet of Things. According to the results, humor Advertising is positively related to attitude and click intention toward Internet of Things Advertising. But information Ad and interactive Ad affect positive to click intention. This is mean that click intention is more immediate reaction of consumers in the IoT space. Therefore Future research will be designed in a more interactive elements that can lead to positive reaction of consumers on the Internet of Things be more effective if you advertise advertising.

Synthesis of Poly(benzyl ether) Dendrimers Containing Core Diversitiesby Click Chemistry

  • Lee, Jae-Wook;Kim, Byoung-Ki;Han, Seung-Choul;Kim, Ji-Hyeon
    • Bulletin of the Korean Chemical Society
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    • v.30 no.1
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    • pp.157-162
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    • 2009
  • General, fast, and efficient methods for the synthesis of Fréchet-type dendrimers having core diversities were elaborated. Two core building blocks, 4,4'-(3,5-bis(propargyloxy)benzyloxy)bisphenyl and N,N,N',N'-tetra(prop-2- ynyloxycarbonylethyl)-1,2-diaminoethane, were designed to serve as the alkyne functionalities for dendrimer growth via click reactions with the azide-dendrons. The synthetic strategy involved an 1,3-dipolar cycloaddition reaction between an alkyne and an azide- functionalized Fréchet-type dendrons in the presence of Cu(I) species which is known as the best example of click chemistry.

Strain-promoted alkyne-azide cycloaddition for PET molecular imaging study

  • Jeong, Hyeon Jin;Kim, Dong Wook
    • Journal of Radiopharmaceuticals and Molecular Probes
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    • v.1 no.1
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    • pp.15-22
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    • 2015
  • $^{18}F$-labeling reaction of bioactive molecule via click chemistry is widely used to produce $^{18}F$-labeled radiotracer in the field of radiopharmaceutical science and molecular imaging. In particular, bioorthogonal strain-promoted alkyne-azide cycloaddition (SPAAC) reaction has received much attention as an alternative ligation method for radiolabeling bioactive molecules such as peptides, DNA, proteins as well as nanoparticles. Moreover, SPAAC based pretargeting method could provide tumor images successfully on positron emission tomography system using nanoparticle such as mesoporous silica nanoparticles.

Synthesis of Poly(benzyl ether) Dendrimers by Click Chemistry (클릭 화학에 의한 폴리(벤질에테르)덴드리머의 효율적인 합성)

  • Lee, Jae-Wook;Lee, Un-Yup;Han, Seung-Choul;Kim, Ji-Hyeon;Jin, Sung-Ho
    • Polymer(Korea)
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    • v.33 no.1
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    • pp.67-71
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    • 2009
  • The stitching method for the synthesis of $Fr\acute{e}chet$-type dendrimers was elaborated using click chemistry between an alkyne and an azide. The core building block, 4,4'-(3,5-bis(azidopropyloxy)benzyloxy)bisphenyl, was designed to serve as the azide functionalities for dendrimer growth via click reactions with the alkyne-dendrons. The synthetic strategy involved an 1,3-dipolar cycloaddition reaction between an azide and an alkyne-functionalized $Fr\acute{e}chet$-type dendrons in the presence of Cu(I) species which is known as the best example of click chemistry.

Synthesis of Dendrimer Containing Dialkylated-fluorene Unit as a Core Chromophore via Click Chemistry

  • Han, Seung-Choul;Jin, Sung-Ho;Lee, Jae-Wook
    • Bulletin of the Korean Chemical Society
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    • v.33 no.1
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    • pp.137-142
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    • 2012
  • The convergent synthetic strategy for the emissive dendrimers having the chromophore at core via the coppercatalyzed 1,3-dipolar cycloaddition reaction between alkyne and azide was described. 2,7-Diazido-9,9-dioctyl-9H-fluorene, designed to serve as the core in dendrimer, was stitched with the alkyne-functionalized Frechettype and PAMAM dendrons by the click chemistry leading to the formation of the corresponding fluorescent dendrimers in high yields. The preliminary photoluminescence studies indicated that 2,7-diazido-9,9-dioctyl-9H-fluorene showed no fluorescence due to the quenching effect from the electron-rich ${\alpha}$-nitrogen of the azido group but the dendrimers fluoresced due to the elimination of the quenching through the formation of the triazole ring.