2006年
Polymorph of dimethylacetamide-solvated crystals of 2,9-dichlorodithioketoquinacridone and their hydrogen bonding effect
DYES AND PIGMENTS
- ,
- ,
- 巻
- 69
- 号
- 1-2
- 開始ページ
- 54
- 終了ページ
- 61
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1016/j.dyepig.2005.02.008
- 出版者・発行元
- ELSEVIER SCI LTD
2,9-Dichlorodithioketoquinacridone (DTQ-Cl) is a thionated derivative of industrially important 2,9-dichloroquinacridone used as colorants in painting and imaging industries. Crystallographic and electronic characterizations have been carried out on single crystals of DTQ-Cl recrystallized from solution in dimethylacetamide (DMA). Two kinds of DMA-solvated single crystals were isolated in the form of DTQ-Ci/(DMA)(2): modifications I and II. In both crystals, two DMA molecules are hydrogen-bonded to one DTQ-Cl molecule. Modifications I and II crystallize in different space groups: P2(1)/c and PI, respectively. The DTQ-Cl molecules are arranged in a fashion "hunter's fence" in modification I; whereas all DTQ-Cl molecules are nearly on the molecular plane and stacked in a layered structure in modification II. MO calculations based on the X-ray coordinates revealed that the absorption bands for both DTQ-Cl and DTQ-Cl/(DMA)(2) are expected to appear at longer wavelengths in modification I than in modification II. However, the reverse is the case in experiment. This can be attributed to the difference in excitonic interactions along the stacking axis in modifications I and II. (c) 2005 Elsevier Ltd. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.dyepig.2005.02.008
- ISSN : 0143-7208
- CiNii Articles ID : 120000920860
- Web of Science ID : WOS:000232237000009