Dual-function agents

An attractive example of dual functional agents for biological imaging applications was reported by Sun et al. A fluorescent ruthenium complex was immobilised on to the surface of magnetic nanoparticles via 3-(3,4-dihydroxyphenyl) propanoic acid (DHPPA) and 0,0 -bis(2-aminopropyl) polypropylene glycol-A/ock-polyethylene glycol-i/ock-polypropylene glycol (PPG-PEG-PPG-diamine). ... 

METAL COMPLEXES WITH TRYPANOCIDAL DRUGS. DUAL-FUNCTION AGENTS... 

Allyl methacrylate also exhibits dual functionality and finds use as both a crosslin king agent and as a monomer intermediate. Trialtyt cyan urate has found use as a crosslinking agem in unsaluraied polyester resins. 

Chang CA, Kumar K, Tweedle MF Eur Patent 0454078 Dual functioning excipients for metal contrast agents... 

Binder. The binder of a composite solid propellant serves the dual function of providing a matrix to hold the oxidizer and the metal fuel, and of serving as a fuel itself—although its total makeup in modem formulations may only be 8-10 wt percent. The binder of the propellant usually is considered to consist of the polymer, the curing agent, and the plasticizer—and can arguably include soluble stabilizers, as well. 

The topics to be covered in some detaU in this chapter are antistats, blowing agents, catalysts, fire retardants, mold-release agents, nucleating agents, reinforcements, stabilizers, and surfactants. These topics are presently in alphabetical order as a matter of convenience. The reader should be aware that there are a number of additives used in plastic foams that serve dual functions. These will be noted in the following text. 

A high-temperature cyclic peroxyketal peroxide cross-linking agent for polyethylene has been found to function as a blowing agent as well. This is another example of dual-function additives. Activated by thiodipropionate antioxidants, it evolves COj and should be useful in making crosslinked polyethylene foams. 

A major factor in the rapid commercial utilization of catalytic reforming processing for upgrading low octane naphthas, and the production of aromatics from petroleum sources, has been the development of more active and selective dual-functional catalysts. These catalysts contain a very active hydrogenation-dehydrogenation agent such as platinum, in combination with an acidic oxide support such as alumina or silica-alumina. 

---