Accession Number:

ADA135363

Title:

Photochemical Energy Storage (Photosensitized Isomerization of Norbornadiene to Quadricyclane by Copper (I) Complexes).

Descriptive Note:

Doctoral thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1983-01-01

Pagination or Media Count:

205.0

Abstract:

This research has focused on the sensitized photoisomerization step of a solar energy storage system based on the interconversion of norbornadiene NBD and quadricyclane Q. Sensitizers studied in the photoisomerization were arylphosphine complexes of copperI halides Ph3P3CuX, MePh2P3CuX, DIPHOSCuC1 X C1, Br, I and DIPHOS Ph2PCH22PPh2. The lowest electronic excited state of the complexes can be an effective triplet energy sensitizer as evidenced by a maximum quantum yield of 1.0 with MePh2P3CuX. The sensitization mechanism of the L3CuX complexes is proposed as a bimolecular energy transfer process in which energy transfer takes place through the metal centered orbitals. The efficiency of the MePh2P3CuX sensitizers is unprecedented by other reported inorganic or organic sensitizers however, ligand dissociation of the complexes in dilute solutions detracts from their otherwise attractive features. The free ligands undergo rapid photodecomposition and are extremely poor sensitizers of the NBDQ system.

Subject Categories:

  • Radiation and Nuclear Chemistry
  • Non-electrical Energy Conversion
  • Energy Storage

Distribution Statement:

APPROVED FOR PUBLIC RELEASE