Concentration- and time-dependent eccentric changes in circular dichroism of saccharide-linked ethynylpyridine oligomer with copper(II) ions

Hajime Abe; Yuki Ohishi; Masahiko Inouye

doi:10.1021/jo300735j

Concentration- and time-dependent eccentric changes in circular dichroism of saccharide-linked ethynylpyridine oligomer with copper(II) ions

Hajime Abe^*, Yuki Ohishi, Masahiko Inouye

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We studied the preparation and circular dichroism (CD) behavior of 2,6-pyridylene ethynylene octameric oligomer linked to a β-d-glucoside moiety with a C20-alkylene chain. The addition of Cu(OTf)₂ salt led to a remarkable enhancement of the first CD band of the oligomer, and an unexpected concentration and time dependency were observed. For example, when 1.0 × 10^-3 M of Cu(OTf)₂ was added to a 1,2-dichloroethane solution of the oligomer (5.0 × 10^-4 M, unit concentration), the CD band appeared in the positive at first and gradually inverted into the negative with time.

Original language	English
Pages (from-to)	5209-5214
Number of pages	6
Journal	Journal of Organic Chemistry
Volume	77
Issue number	11
DOIs	https://doi.org/10.1021/jo300735j
State	Published - 2012/06/01

ASJC Scopus subject areas

Organic Chemistry

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@article{36204b724ee64312abbdf45dda934aaf,

title = "Concentration- and time-dependent eccentric changes in circular dichroism of saccharide-linked ethynylpyridine oligomer with copper(II) ions",

abstract = "We studied the preparation and circular dichroism (CD) behavior of 2,6-pyridylene ethynylene octameric oligomer linked to a β-d-glucoside moiety with a C20-alkylene chain. The addition of Cu(OTf)2 salt led to a remarkable enhancement of the first CD band of the oligomer, and an unexpected concentration and time dependency were observed. For example, when 1.0 × 10-3 M of Cu(OTf)2 was added to a 1,2-dichloroethane solution of the oligomer (5.0 × 10-4 M, unit concentration), the CD band appeared in the positive at first and gradually inverted into the negative with time.",

author = "Hajime Abe and Yuki Ohishi and Masahiko Inouye",

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doi = "10.1021/jo300735j",

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T1 - Concentration- and time-dependent eccentric changes in circular dichroism of saccharide-linked ethynylpyridine oligomer with copper(II) ions

AU - Abe, Hajime

AU - Ohishi, Yuki

AU - Inouye, Masahiko

PY - 2012/6/1

Y1 - 2012/6/1

N2 - We studied the preparation and circular dichroism (CD) behavior of 2,6-pyridylene ethynylene octameric oligomer linked to a β-d-glucoside moiety with a C20-alkylene chain. The addition of Cu(OTf)2 salt led to a remarkable enhancement of the first CD band of the oligomer, and an unexpected concentration and time dependency were observed. For example, when 1.0 × 10-3 M of Cu(OTf)2 was added to a 1,2-dichloroethane solution of the oligomer (5.0 × 10-4 M, unit concentration), the CD band appeared in the positive at first and gradually inverted into the negative with time.

AB - We studied the preparation and circular dichroism (CD) behavior of 2,6-pyridylene ethynylene octameric oligomer linked to a β-d-glucoside moiety with a C20-alkylene chain. The addition of Cu(OTf)2 salt led to a remarkable enhancement of the first CD band of the oligomer, and an unexpected concentration and time dependency were observed. For example, when 1.0 × 10-3 M of Cu(OTf)2 was added to a 1,2-dichloroethane solution of the oligomer (5.0 × 10-4 M, unit concentration), the CD band appeared in the positive at first and gradually inverted into the negative with time.

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U2 - 10.1021/jo300735j

DO - 10.1021/jo300735j

M3 - 学術論文

C2 - 22577964

AN - SCOPUS:84861835286

SN - 0022-3263

VL - 77

SP - 5209

EP - 5214

JO - Journal of Organic Chemistry

JF - Journal of Organic Chemistry

IS - 11

ER -

Concentration- and time-dependent eccentric changes in circular dichroism of saccharide-linked ethynylpyridine oligomer with copper(II) ions

Abstract

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