Single dibenzoterrylene molecules in naphthalene and 2,3-dimethylnaphthalene crystals: vibronic spectra
Single dibenzoterrylene molecules in naphthalene and 2,3-dimethylnaphthalene crystals: vibronic spectra
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DOI：
10.1039/c0cp01730b
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发表时间：
2011-01-01
影响因子：
3.3
通讯作者：
Kozankiewicz, Boleslaw
中科院分区：
文献类型：
--
作者：
Deperasinska, Irena;Karpiuk, Elena;Kozankiewicz, Boleslaw
在 5 K 下研究了嵌入萘 (N) 和 2,3-二甲基萘 (2,3-DMN) 晶体中的单个二苯并三萘 (DBT) 分子的荧光激发光谱。表征 N 晶体中单个 DBT 分子的振动结构的频率与孤立 DBT 分子的理论预测一致。 2,3-DMN 晶体中遇到的“偶极”无序导致单个 DBT 分子的 (0,0) 线频率分布广泛。此外，在 2,3-DMN 晶体中观察到的 DBT 光谱中的振动频率和强度与 N 晶体中的略有不同。我们得出的结论是，与孤立的 DBT 相比，2,3-DMN 晶体中 DBT 分子的结构受到干扰，主要变化涉及其中心并四苯部分。
Fluorescence excitation spectra of single dibenzoterrylene (DBT) molecules embedded in naphthalene (N) and 2,3-dimethylnaphthalene (2,3-DMN) crystals were studied at 5 K. The frequencies characterizing the vibronic structure of single DBT molecules in an N crystal agree with the theoretical prediction for the isolated DBT molecule. The 'dipolar' disorder encountered in 2,3-DMN crystals leads to a broad distribution of frequencies of the (0,0) lines of single DBT molecules. Moreover, the observed vibronic frequencies and intensities in the spectrum of DBT in 2,3-DMN crystals are slightly different to those in an N crystal. We conclude that the structure of DBT molecules in a 2,3-DMN crystal is disturbed in comparison with isolated DBT and the main change concerns its central tetracene moiety.