Organic Optic-electric Functional Molecules And Their Application In High Density Information Storage

Organic optic-electric functional molecules and their application in high density information storage were studied in this dissertation.Donor-acceptor molecules,2-((5-(5-(4-(dim-tolylamino)phenyl)thiophen-2-yl)Thiophen-2-yl) methyl ene) malononitrile(TPTTMM) and2-((5-(5-(4-(9H-carbazol-9-yl) phenyl) thiophen-2-yl)thiophen-2-yl)methylene)malononitrile(CPTTMM) were designed and synthesized for the data storage.By applying pulsed voltages between the tip of scanning tunneling microscopy(STM) and highly ordered pyrolytic graphite(HOPG) substrate,reversible nanoscale data recording on these films were achieved.The average size of the recording dots were about4.0nm and8.0nm in diameter.Mechanism analysis indicated that intermolecular charge transfer was speculated to be the mechanism of the formation of information dots. The result would provide a new way for the design of reversible high density data storage by groups optimization.We designed and synthesized an organic molecule T with electron donor and acceptor to research the effect of molecule coplanarity on data storage. It showed non-reversible photochromic propertyand could be used for optical information storage.At the same time,it performed electrical-responsive characters and could be applied in electrical data storage by STM. Results shows that, a good coplanarity which makes against the stability of charge transfer is bad for the study of data storage, while a bad coplanarity reduces the degree of delocalized electron to form irreversible data storage, so controlling the coplanarity will take effect on reversible data storage.