SYNTHESIS OF CHROMOTROPIC COLORANTS

In a study of photochromic colorants potentially useful for a 'chameleon' type camouflage system, a number of metal dithizonates were synthetically modified by introduction or groups in the ortho, meta and para positions of both phenyl rings of dithizone. The resulting complexes were teste...

Full description

Saved in:
Bibliographic Details
Main Authors: Coleman, Ralph A, Foster, Jr , Walter H, Kazan, John, Mason, Marion
Format: Report
Language:English
Subjects:
CAMOUFLAGE
Coatings, Colorants and Finishes
COLORING
DYES
MERCURY
Military Operations, Strategy and Tactics
NYLON
Organic Chemistry
ORGANIC SULFUR COMPOUNDS
ORGANOMETALLIC COMPOUNDS
PALLADIUM COMPOUNDS
PHOTOSENSITIVITY
Radiation and Nuclear Chemistry
STABILITY
SUBSTITUTION REACTIONS
SYNTHESIS(CHEMISTRY)
TEXTILES
ZINC COMPOUNDS
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In a study of photochromic colorants potentially useful for a 'chameleon' type camouflage system, a number of metal dithizonates were synthetically modified by introduction or groups in the ortho, meta and para positions of both phenyl rings of dithizone. The resulting complexes were tested for spectral, photochromic and lightfastness properties. While spectral changes and increases in both solubility and lightfastness were affected by some ortho substituents, the photochromic properties (photostationary conversion and thermal return rate) were only slightly affected by substitution. The complexes of mercury exhibit the best all-round performance although some zinc complexes approach the performance of mercury. The complexes of palladium exhibit potentially useful spectral and photochromic behavior that is quite different from the mercury type complexes and more application research is recommended regarding the incorporation of these palladium complexes in textile fibers. Fiber reactivity (on nylon) has been introduced into the mercury dithizonate system via a dichlorotriazinyl reactive group. This compound exhibited photochromic properties when reacted with nylon.