A New Type Photon-Gated Photochemical Hole Burning by Two-Color-Sensitized Photoreaction,
Abstract
Photochemical Hole Burning (PHB) has attracted considerable interest not only as a tool for high resolution spectroscopy of amorphous solid at low temperature but also as a possible means for frequency-domain high-density optical storage. Many recent investigations have been devoted to a photon-gated mechanism because it allows nondestructive readout in utilizing PHB for a practical optical memory system. The mechanisms of previously reported photon-gated PHB systems are two-step photoionization, photodecomposition, and photoinduced donor-acceptor electron transfer reactions. In this presentation, we report the first observation to our knowledge of a new mechanism for photon-gated PHB: two color photosensitization of the photoreactive matrix polymer that involves triplet-triplet energy transfer process from higher excited triplet state of sensitizer to photoreactive energy acceptor groups. The present system consists of a zinc 9,18,27,36-tetra(4-tolyl)-tetrabenzoporphine (ZnTTBP), and a glycidyl azide polymer (GAP) cross-linked with trimethylol propane and isophorone diisocyanate.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP008266
Entities
People
- Kazuyuki Horie
- Shinjiro Machida
- Takashi Yamashita
Organizations
- University of Tokyo