Kumagai, Akira; Fujiwara, Yoshiki; Fukumoto, Hiroki; Sasaki, Shintaro; Koinuma, Hideomi; Yamamoto, Takakazu published the article 《Molecular alignments studied by X-ray diffraction analysis and optical properties of vacuum-deposited thin films of thiophene-pyridine co-oligomers》. Keywords: thiophene pyridine oligomer mol alignment x ray diffraction.They researched the compound: 2-(5-Bromothiophen-2-yl)pyridine( cas:123784-07-6 ).HPLC of Formula: 123784-07-6. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:123784-07-6) here.
An X-ray diffraction study of vacuum-deposited films of thiophene-pyridine co-oligomers on a sapphire substrate indicated a perpendicular or perpendicular-like alignment of the co-oligomers on the surface of the substrate. The UV-vis peak of the vacuum-deposited films shifted to a shorter wavelength from that observed in solutions The UV-vis data support the notion that the co-oligomer in the vacuum-deposited film assumes a twisted conformation.
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Reference:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem