Catalytic Kinetic Analysis And A New Dual-band Conversion Of Light Energy Composites

Catalytic kinetic fluorimetry is an attractive powerful way to determine trace amounts of component because of its high sensitivity, accuracy and selectivity. It is based on catalytic reaction to determine the contents of substances and becomes the main type of kinetic fluorimetiy. Because the measured objects are not determinands but other 揷hemically amplified?substances, the sensitivity of the method is very high with the detection limit down to levels of ppb or ppt. In previous application of this method to the determination of transition metals especially noble metals, the indicator reagents are relatively obsolete. Aiming at this state, we synthesized a novel kind of specific fluorescent hydrazone reagents, and applied them as indicator reagents in the determination of transition metals especially noble metals. Such as: O-Vanillin Salicyloylhydrazone and Salicylaldehyde P-Nitro-Benzoylhydrazone were synthesized and applied successfully to the determination of osmium and iridium in synthetic mixtures and mineral samples respectively; 2-Hydroxy- 1 -Naphthaldehyde Salicyloylhydrazone was applied successfully to the determination of manganese in human hair, wheat powder, lake water and tap water. Nowadays, society is in the epoch of intellectual economy. Science and technology is the first productivity. To transform science and technology into productive force, and realize its economical and social merit are the burden duties of every scientific worker. As we engaged in the research of applying catalytic kinetic fluorimetry to the real determinations, we also went in for a deep research of light energy transforming film material in the field of high-tech agriculture. Now, films that are added with light energy transforming material, emit red light or blue light singly. Photosynthesis will be strengthened when the component of 4 both red light and blue light increases. Based on this principle, we engaged in the research of novel dual-wave band light energy transforming film composite, which can absorb 290 ?400nm near ultraviolet region and emit in the regions of 450 ?480nm (blue region) and 600 ?650nm (red region). Our stage progresses are: Two kinds of novel and effective light energy transforming material, which can absorb near ultraviolet light and emit blue or red light, have been synthesized and characterized. The compositions of them were confirmed, and some properties of them were studied. The most outstanding merit of the light energy - transfonning material is that the blue or red band they emit is close to the blue or red band chlorophyll absorbs. If they are added in film as composite, the photosynthesis of crops will strengthened greatly. The proportion of aforementioned two light transforming material, which well meets crops?needs for red and blue light, has been studied by spectrofluorimetry.