Excited and ionic states of polymers with pendant phenanthryl groups in solution. Model systems for photophysics in phenanthrene aggregates

Naoto Tamai, Hiroshi Masuhara*, Noboru Mataga

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Using N2 gas laser and picosecond Nd3+:YAG laser photolysis systems, we measured the transient absorption spectra of 9-ethylphenanthrene (EPh), 1,3-di-(9-phenanthryl)propane (DPhP), poly[2-(9-phenanthryl)ethyl vinyl ether] (PPhEVE), and poly(9-vinylphenanthrene) (PVPh) in solution. The Sn ← S1 absorption spectrum is almost common to the present compounds, indicating a very weak interchromophore interaction in the excited singlet state. The absorption spectrum of the triplet and cationic states changes from compound to compound, while the spectra of their anion radicals are identical. The triplet excitation and the positive hole can be stabilized easily by forming excimer and dimer cation, respectively, whose conformations are discussed in detail. In the case of polymer systems, plural dimer sites with different geometries exist, which is due to the stacking effect of chromophores. On the other hand, the negative charge is always trapped as a monomer anion. On the basis of the present results, the photophysics of phenanthrene aggregates is discussed.

Original languageEnglish
Pages (from-to)4461-4467
Number of pages7
JournalJournal of Physical Chemistry
Volume87
Issue number22
DOIs
StatePublished - 1 Jan 1983

Fingerprint Dive into the research topics of 'Excited and ionic states of polymers with pendant phenanthryl groups in solution. Model systems for photophysics in phenanthrene aggregates'. Together they form a unique fingerprint.

Cite this