Synthesis and Near-Infrared Luminescence of a Deuterated Conjugated Porphyrin Dimer for Probing the Mechanism of Non-Radiative Deactivation (Postprint)
Abstract
Beta-meso-beta-Fused porphyrin oligomers have many attractive photophysical features such as strong absorption in the near-IR at wavelengths greater than 1000 nm, and high two-photon cross sections. However their ultrafast S(sub-1)-S(sub-0) deactivation limits potential applications. We have synthesised a deuterated fused porphyrin dimer to test whether deuteration influences the rate of non-radiative deactivation. An efficient synthetic strategy was developed, starting with deuteration of dipyrromethane. Deuteration of the zinc porphyrin dimer does not affect its fluorescence quantum yield in CD2Cl2. This implies that the ultrafast non-radiative deactivation is not simply a consequence of the small S(sub-1)-S(sub-0) energy gaps to the beta-meso-beta-fused porphyrin oligomers but with slower rates of S(sub-1)-S(sub-0) decay.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2007
- Accession Number
- ADA473750
Entities
People
- Gianluca Accorsi
- Harry Anderson
- Joy E. Rogers
- Kenneth J. Mcewan
- Michael J. Frampton
- Nicola Armaroli
- Paul A. Fleitz
Organizations
- Air Force Research Laboratory