New approach to silver halide photography using radical cation chemistry

Authors
Gould, IR Lenhard, JR Muenter, AA Godleski, SA Farid, S
Citation
Ir. Gould et al., New approach to silver halide photography using radical cation chemistry, PUR A CHEM, 73(3), 2001, pp. 455-458
Citations number
20
Categorie Soggetti
Chemistry
Journal title
PURE AND APPLIED CHEMISTRY
ISSN journal
00334545 → ACNP
Volume
73
Issue
3
Year of publication
2001
Pages
455 - 458
Database
ISI
SICI code
0033-4545(200103)73:3<455:NATSHP>2.0.ZU;2-T
Abstract
A new mechanism for spectral sensitization of silver halide is described, w hich can potentially double the sensitivity of photographic emulsions. The photooxidized sensitizing dye is trapped using an organic donor molecule, w hich fragments to form a cation and a reducing radical, which injects an el ectron into the conduction band of the silver halide. In this way. two cond uction-band electrons can be produced for each absorbed photon.