Type

Journal Article

Authors

Werner Blau
David Rickard
Mathias Senge
Silvia Giordani

Subjects

Chemistry

Topics
molecular engineering porphyrin carbon nanotube atomic molecular and chemical physics linear modeling molecular conformation single walled nanotubes swnts optical properties

Molecular Engineering of Nonplanar Porphyrin and Carbon Nanotube Assemblies- a Linear and Nonlinear Spectroscopic and Modeling Study (2011)

Abstract The importance of molecular conformation to the nature and strength of noncovalent interactions existing between a series of increasingly nonplanar tetraphenylporphyrin (TPP) derivatives and carbon nanotubes was systematically investigated experimentally in solution using a range of linear and nonlinear optical techniques. Additional complementary molecular dynamics studies were found to support the experimental observations. Convincing evidence of binding between single walled nanotubes (SWNTs) and some of these porphyrins was discovered, and a nonplanar macrocycle conformation was found to increase the likelihood of noncovalent binding onto nanotubes. Nonlinear optical studies showed that the optical limiting behavior of the TPP derivatives deteriorated with increasing porphyrin nonplanarity, but that formation of nanotube composites dramatically improved the optical limiting properties of all molecules studied. It was also found that the significant photoluminescence quenching behavior reported in the literature for such porphyrin/SWNT composites is at least partly caused by photoluminescence and excitation self-absorption and is, therefore, an artifact of the system.
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Full list of authors on original publication

Werner Blau, David Rickard, Mathias Senge, Silvia Giordani

Experts in our system

1
Werner Blau
Trinity College Dublin
Total Publications: 109
 
2
Mathias Senge
Trinity College Dublin
Total Publications: 194
 
3
Silvia Giordani
Trinity College Dublin
Total Publications: 37