玻璃表面亚甲基蓝晶体的取向和偏振光谱(380-900 nm)

M. Milošević, M. Logar, A. V. Poharc-Logar, N. Jaksic
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引用次数: 21

摘要

可以准确定位晶体的偏振光方向,从而根据已知的晶体结构一致地解释从偏振光谱中获得的信息。采用XRD、XRPD和偏振VIS-NIR分析了亚甲基蓝(MB)晶体的取向和光学性质。阳离子染料MB在玻璃板岩上聚合成晶体。蓝色晶体具有明显的二色性,双片层结构,叶片状至纤维状。根据XRD数据,[010]方向与晶体表面垂直,因此我们将其识别为(0k0)面,而[100]和[001]方向分别与晶体伸长和晶体厚度重合。本文给出了MB晶体的偏振光谱,并对其进行了测量,以期获得参考值,从而为鉴定MB分子聚集提供参考。
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Orientation and Optical Polarized Spectra (380–900 nm) of Methylene Blue Crystals on a Glass Surface
The crystallographic directions of the crystal toward the vector of polarized light can accurately be positioned, so the information that we gain from polarized spectra can be consistently interpreted according to known crystal structure. The orientation and optical properties of the methylene blue (MB) crystals were analyzed by XRD, XRPD, and polarized VIS-NIR spectroscopy. Cationic dye, MB, was polymerized into crystals on a glass slate. The blue color crystals showed pronounced dichroism, twin lamellar structure and bladed to fibrous habit. According to XRD data, [010] direction lies perpendicular to the crystal surface, so we recognized it as (0k0) face, while [100] and [001] directions coincide with crystal elongation and crystal thickness respectively. In this paper, the polarized spectra of MB crystal are presented, measured with the aim of acquisition of referent values, which could be helpful for the identification of MB molecular aggregation.
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