Nanoscale architectures for molecular electronics: vibrational spectroscopy and structure of solid hexa-n-dodecyl-hexa-peri-hexabenzocoronene.
Nanoscale architectures for molecular electronics: vibrational spectroscopy and structure of solid hexa-n-dodecyl-hexa-peri-hexabenzocoronene.
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分子电子学的纳米级结构：固体六正十二烷基六六苯并苯的振动光谱和结构。
DOI：
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发表时间：
2005
影响因子：
4.4
通讯作者：
Jishan Wu
中科院分区：
文献类型：
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作者：
M. Carminati;L. Brambilla;G. Zerbi;K. Muellen;Jishan Wu
用红外光谱和拉曼振动光谱研究了六-正十二烷基-六-环六苯二烯（HBC-C12）形成的固态柱状盘状相和液晶相。红外光谱清楚地显示了文献中报道的42℃和107℃的两个相变，并使我们能够理解通过转变发生的n-烷基链的构象修饰。根据收集到的数据，我们提出了HBC-C12在42℃以下固晶相的结构模型，其中包括烷基链的结构。高取向样品的二向色红外显微测量也证实了这一模型。
The solid columnar discotic and liquid-crystalline phases formed by hexa-n-dodecyl-hexa-peri-hexabenzocoronene (HBC-C12) have been investigated by IR and Raman vibrational spectroscopies. IR spectra clearly show the two phase transitions at 42 and at 107 degrees C already reported in literature and allow us to understand the conformational modifications of the n-alkyl chains that take place through the transitions. Thanks to the collected data, we propose a model of the structure of HBC-C12 in the solid-crystalline phase below 42 degrees C which includes the structure of the alkyl chains. This model is also confirmed by dichroic infrared microscopy measurements on highly oriented samples.