Interaction between monomeric units of donor-acceptor-functionalized azobenzene dendrimers: effects on macroscopic configuration and first hyperpolarizability
Article Abstract:
Ab initio molecular orbital calculations for 4-(dimethylamino)-4'-carboxyazobenzene and 4-(dimethyl-amino)-2'-nitro-4'-carboxazobenzene monomers, covalently bonded dimers is studied. The findings of the study indicate that the interaction between monomeric units of azobenzene dendrimers could be attributed to the noncentrosymmetric arrangement of the dendrimers and the monomeric units, which are in series, may be responsible for the increased first hyperpolarizability.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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Conductivity measurement of polydiacetylene thin films by double-tip scanning tunneling microscopy
Article Abstract:
The conductivity of polydiacetylene thin films is evaluated in the region below 20micrometer using a newly constructed independently driven double-tip tunneling microscope. The polydiacetylene thin films fabricated by means of the Langmuir-Blodgett method showed the formation of islands with sizes of 2-20 micrometer with the polydiacetylene backbone extended in one direction in each island.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
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Ultrafast dynamics of electronic excitations in a light-harvesting phenylacetylene dendrimer
Article Abstract:
A study was conducted, by using the femtosecond degenerate pump-probe spectroscopy, to investigate the ultrafast dynamics of electronic excitations in the nanostar dendrimers. The transients reveal several components with relaxation times ranging from several hundred femtoseconds to tens of picoseconds, depending on the excitation wavelength.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
User Contributions:
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