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フルテキストURL2007020087.pdf ( 547.8KB ) 公開日 2010-04-16
タイトルX-ray and thermal studies on the crystalline phases of normal alkanethiols n-CnH2n+1SH (n=18, 19, 22, 23, 24)
作成者Nozaki, Koji
Munekane, Masanao
Yamamoto, Takashi
Ogawa, Yoshihiro
作成者ヨミノザキ, コウジ
ムネカネ, マサナオ
ヤマモト, タカシ
オガワ, ヨシヒロ
作成者別表記野崎, 浩二
宗兼, 正直
山本, 隆
小川, 芳弘
作成者所属山口大学大学院理工学研究科(理学)
内容記述(抄録等)Crystal structures, polymorphism, and phase transitions of five n-aklanethiols (n-CnH2n+1SH: CnSH), C18SH, C19SH, C22SH, C23SH, and C24HSH have been investigated by means of differential scanning calorimetry and X-ray diffraction. Normal alkanethiols with odd carbon number have only one crystalline form, the E2 form. While, n-alkanethiols with even carbon number have two low-temperature crystalline forms, the most stable E1 form and the meta-stable E1′ form. When even n-alkanethiols are crystallized from the solution (solution growth crystal: SGC), they crystallize into the E1 form. When they are cooled from the melt (melt growth crystal: MGC), on the other hand, the E1′ form appears. In all crystalline phases, two n-alkanethiol molecules are connected at SH end mutually by hydrogen bond resulting in forming a dimer in both forms. The SH groups and the CH3 groups are arranged on the respectively different layer surfaces resulting in the bilayer structure in the E1 form. In the E1′ form, on the other hand, although the molecules form dimers locally, the SH and methyl groups do not form the one layer surface, respectively, but are arranged disorderly. At temperature just below the melting point, characteristic high-temperature phase, the rotator phase, is observed in even n-alkanethiols as well as in n-alkane system.
本文言語eng
著者キーワードalkanethiol
phase transition
crystal structure
X-ray diffraction
polymorph
主題化学
資料タイプtext
ファイル形式application/pdf
出版者Springer
NII資料タイプ学術雑誌論文
査読の有無査読あり
ISSN0022-2461
NCIDAA00701725
掲載誌名Journal of Materials Science
41
12
開始ページ3935
終了ページ3946
発行日2006-06
DOIinfo:doi/10.1007/s10853-005-5503-x
関連情報URL(IsPartOf)http://www.springerlink.com/content/1573-4803/
著者版/出版社版著者版
備考The original publication is available at www.springerlink.com.
リポジトリID2007020087
地域区分山口大学
URIhttp://www.lib.yamaguchi-u.ac.jp/yunoca/handle/2007020087