04-10-2012 дата публикации
Номер: US20120253044A1
Принадлежит:
Organoboron compounds are described that upon exposure to light absorb light and isomerize and form a dark-colored isomer. The dark-colored isomer converts back to the colorless isomer upon removal of light, or exposure to oxygen or heat. Such compounds can be added into polymeric matrices such as films. These compounds are suitable for UV-blocking, UV-detecting, and for oxygen-sensing applications. Uses include UV-blocking windows, sunglasses, and as indicators in packaging such as food packaging. 2. The compound of claim 1 , wherein:(i) X is carbon, and at least one of Z and Y is a heteroatom;(ii) one of X, Y and Z is nitro en one of X, Y and Z is carbon and one of X, Y and Z is sulfur or oxygen;(iii) one of X, Y and Z is nitrogen, and two of X, Y and Z are carbon;(iii) X is oxygen or sulfur, and both Y and Z are carbon;(iv) one of X, Y and Z is carbon, and two of X, Y and Z are nitrogen; or(v) X, Y and Z are each nitrogen.37-. (canceled)8. The compound of claim 1 , wherein the compound of general formula (A) is: compound 1 claim 1 , compound 2 claim 1 , compound 8 claim 1 , compound 9 claim 1 , compound 10 claim 1 , compound 11 claim 1 , compound 12 claim 1 , compound 13 claim 1 , or compound 14.9. The compound of claim 1 , wherein Ar is 1 claim 1 ,3 claim 1 ,5-mesityl.10. The compound of claim 1 , wherein R is B(mesityl).11. The compound of claim 1 , wherein G is carbon.13. The compound of claim 12 , wherein G is carbon.14. The compound of claim 12 , wherein G is carbon claim 12 , E is nitrogen claim 12 , Y in the ring containing G is nitrogen claim 12 , and Y in the other ring is carbon.15. The compound of claim 12 , wherein a is 0; or wherein a is 1 in the ring containing G claim 12 , and a is 0 in the other ring.16. (canceled)17. The compound of claim 12 , wherein b is 1 in the ring containing G claim 12 , and b is 0 in the other ring.18. The compound of claim 12 , wherein b is 3 in the ring containing G; and b is 0 in the other ring or two substituents join ...
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