Premium
Molecular Packing in Self‐Assembled p ‐ n and n‐p‐n Heterostructure Co‐oligomers
Author(s) -
Wan Junhua,
Li Yibao,
Ma Zhun,
Li Tingcheng,
Huang Wei
Publication year - 2010
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201090305
Subject(s) - chemistry , oligomer , scanning tunneling microscope , monolayer , differential scanning calorimetry , heterojunction , crystallography , molecule , self assembly , polymer , diffraction , nanotechnology , polymer chemistry , materials science , optics , organic chemistry , optoelectronics , biochemistry , physics , thermodynamics
The molecular packing structure in the self‐assembled p‐n and n‐p‐n heterostructure oligomers (OT 2 O and T 2 O 2 ) was investigated. The macroscopic properties of the two oligomers were systemically investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM) and X‐ray diffraction (XRD), which revealed that the 3D (three‐dimensional) assemblies of the two oligomers exhibited obvious differences. The two‐dimensional assemblies (2D) of them were identified by scanning tunneling microscopy (STM) on a highly oriented poyrolytic graphite (HOPG) surface. Well‐ordered monolayer assembly structures were fabricated by symmetric molecules (OT 2 Os), while the ordered dormain of asymmetric molecule (T 2 O 2 s) could not be clearly resolved. This system, as an excellent example, may provide guidance for the design of the novel p‐n heterostructure oligomer and polymer.