JaLCDOI 10.18926/fest/12837
FullText URL 13_121_124.pdf
Author Takaguchi, Yutaka| Yanagimoto, Yasushi|
Abstract Amphiphilic anthryl dendrons 5 and 6, which have carboxylate groups or oligo(ethyleneoxide) groups at the terminals, show solvatochromic properties. Reaction efficiency of photodimerization and dynamic light scattering (DLS) experiment of 5 and 6 reveal that formation of the aggregate of dendrons 5 or 6 plays a crucial role in this solvatochromism. Interestingly, solvatochromic property of anthryl dendron 6 was useful for determination of the ratio of methanol/water in solution as a fluorescent probe.
Keywords dendrimer anthracene fluorescence solvatochromism water methanol
Publication Title 岡山大学環境理工学部研究報告
Published Date 2008-03
Volume volume13
Issue issue1
Start Page 121
End Page 124
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002304793
JaLCDOI 10.18926/fest/11508
FullText URL 010_111_117.pdf
Author Alam Ashraful| Takaguchi, Yutaka| Tsuboi, Sadao|
Abstract Synthesis of ellagic acid and its 4,4'-di-Ο-alkyl derivatives from gallic acid is described. Ellagic acid is prepared by oxidative coupling of gallic acid with ο-chloranil. Functionalized methyl bormogallate underwent Ullmann coupling to give the biphenyl that upon lactonization resulted in the ellagic acid and its alkoxy derivatives.
Keywords ellagic acid 4,4'-di-Ο-alkylellagic acid Ullmann coupling oxidative coupling
Publication Title 岡山大学環境理工学部研究報告
Published Date 2005-02-28
Volume volume10
Issue issue1
Start Page 111
End Page 117
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313598
JaLCDOI 10.18926/fest/11506
FullText URL 010_105_109.pdf
Author Alam Ashraful| Takaguchi, Yutaka| Tsuboi, Sadao|
Abstract Ortho-monobromination of phenols and polyphenols by 1,3-dibromo-5,5-dimethylhydantoin (DBDMH) is described. A simple addition of commercially available DBDMH to phenols and polyphenols in chloroform at room temperature resulted in a good to excellent yield of corresponding ortho-monobromo derivatives.
Keywords ortho-monobromination phenol polyphenol DBDMH
Publication Title 岡山大学環境理工学部研究報告
Published Date 2005-02-28
Volume volume10
Issue issue1
Start Page 105
End Page 109
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313473