The reaction of hexaaquacopper(II) ions with iodide ions
We report an efficient synthesis of copper indium sulfide nanocrystals with strong photoluminescence in the visible to near-infrared. This method can produce gram quantities of material with a chemical yield in excess of 90% with minimal solvent waste. The overgrowth of as-prepared nanocrystals with a few monolayers of CdS or ZnS increases the photoluminescence quantum efficiency to > 80%. On the basis of time-resolved spectroscopic studies of core/shell particles, we conclude that the emission is due to an optical transition that couples a quantized electron state to a localized hole state, which is most likely associated with an internal defect.
Some essential copper(I) chemistry
Rationalization of the stability of CuI shouldinvolve discussions of relative insolubilities and Ksp, thehard/soft acid-base principle, stoichiometry, and, of course, the redoxchemistry of copper and the halogens.
Ryan R. Walvoord was born in 1986 in the small town of Williamson, NY. He received a B.S. in Chemistry from the Rochester Institute of Technology in 2007, where he performed undergraduate research in the laboratories of Professor Christina G. Collison. In the same year, he began his graduate studies at the University of Pennsylvania under the guidance of Professor Marisa C. Kozlowski. His research in the Kozlowski group has focused on the synthesis and chemistry of arylnitromethanes, as well as the spectroscopic investigation of hydrogen bonding using colorimetric sensors.
Formula for potassium iodide: 1 gram dissolves in 0.7 ml water.
You can get the white precipitate of copper(I) chloride (mentioned above) by adding water to this solution. This reverses the last reaction by stripping off the extra chloride ion.
Copper(I) iodide is the inorganic compound with the formula CuI
The leaf samples were air dried for 3 weeks, pulverized into uniform powder using a blender and extracted using methanol. Fifty grams of the pulverized leaves was soaked in 500 mL absolute methanol (Sigma, USA) for 24 h in a 1 L conical flask after which filtration of the mixture followed using two folds of Whatman No. 1 filter paper. The extract was then concentrated at 40°C in a vacuum using rotary evaporator (Eyela Rotavap N-1001, Rikakikai Co. Ltd., Tokyo). The same procedure was used in the distilled water extraction of phytochemicals.
It is also known as cuprous iodide
Mountainous terrain and areas that have been covered by glaciers tend to be iodine deficient anywhere in the world. Large areas of the United States, particularly the mid-West and mountain states are our "goiter belt." Populations that live there are at increased risk of both goiter and cancer. In particular, cancer of the uterus, ovary and breast all correlate inversely to iodine intake. It may be that low iodine leads to increased pituitary gonadotrophin and increased estrogen, which is a tumor promoter. Before the use of iodized salt in 1924 about half the people of Michigan had thyroid goiters! Recently these are found in 3 percent of American men and 10 percent of women. There are many more borderline cases that go undiagnosed, despite complaints of fatigue, cold intolerance and low body temperature. The temperature test is not specific to thyroid and in many cases deficiencies of trace minerals, such as copper and zinc, are at fault. Inadequate caloric intake can also cause thyroid activity to drop; so diagnosis is not so simple.
Copper (Cu) Catalysts | Sigma-Aldrich
For example, both [Cu(NH3)2]+ and [CuCl2]- are copper(I) complexes which don't disproportionate.
Aerobic Copper-Catalyzed Organic Reactions - …
Using the Cornell Index Questionnaire to measure the number of symptoms in a thousand dentists and their wives Drs. Cheraskin and Ringsdorf found that as iodine intake went up the number of symptoms declined so that the ideal daily iodine intake appears to be 1100 mcg., ie. 7 times the RDA, which is the amount contained in most multi-vitamin tablets or in a teaspoonful of iodized salt. Ocean kelp contains about 5000 mcg per teaspoonful. By comparison, potassium iodide, which is available only on prescription, contains 30,000 mcg (ie. 30 mg) per drop. Evidently there are benefits from iodine beyond its essential role in the formation of thyroid hormone. In fact, that is the main conclusion of this review: