Supramolecular complex flavor immobilizing for controlled release of flavor in smoking articles
A smokable composition includes (a) a smokable material; and (b) a supramolecular assembly. The supramolecular assembly comprises a flavorant and at least one selected from the group consisting of O,O′-dibenzoyl-(2R,3R)-tartaric acid, a hydrate thereof or a salt thereof, and ditoluoyl-(2R,3R)-tartaric acid, a hydrate thereof or a salt thereof. In addition, a smoking article comprises a rod of tobacco or tobacco substitute, optionally a filter attached to the rod, and the supramolecular assembly, as menthol-release agent.
1. A smokable composition comprising:
(a) a smokable material; and
(b) a supramolecular assembly,
wherein the supramolecular assembly comprises a flavorant and at least one selected from the group consisting of O,O′-dibenzoyl-(2R,3R)-tartaric acid, a hydrate thereof or a salt thereof, and ditoluoyl-(2R,3R)-tartaric acid, a hydrate thereof or a salt thereof.
2. The smokable composition of claim 1 , wherein the flavorant is at least one selected from the group consisting of vanillin, linalool, menthol, guaicol, thymol, coumarin, eugenol, cinnamaldehyde and geraniol.
3. The smokable composition of claim 1 , wherein the flavorant comprises (−)-menthol.
4. A smoking article comprising:
(a) a rod of tobacco or tobacco substitute;
(b) optionally a filter attached to the rod; and
(c) a supramolecular assembly,
wherein the supramolecular assembly comprises a flavorant and at least one selected from the group consisting of O,O′-dibenzoyl-(2R,3R)-tartaric acid, a hydrate thereof or a salt thereof, and ditoluoyl-(2R,3R)-tartaric acid, a hydrate thereof or a salt thereof.
5. The smoking article of claim 4 , wherein the supramolecular assembly is present within the rod, within the filter, and/or at or near the rod/filter element interface.
6. The smoking article of claim 4 , wherein the smoking article is a cigarette and the supramolecular assembly is present within the rod or in a paper wrapper thereof, within the filter or in a paper wrapper thereof, and/or at or near the rod/filter element interface.
7. The smoking article of claim 4 , wherein the supramolecular assembly is present within the rod and toward the downstream end of the rod.
8. The smoking article of claim 4 , wherein the filter comprises a sorbent.
9. The smoking article of claim 8 , wherein the sorbent comprises at least one selected from the group consisting of at least one sorbent selected from the group consisting of carbons, aluminas, silicates, molecular sieves, polymeric materials, zeolites and metal particles.
10. The smoking article of claim 8 , wherein the sorbent comprises active carbon.
11. A method for preparing the smoking article of claim 4 , comprising:
(a) preparing a supramolecular assembly; and
(b) incorporating the supramolecular assembly into a smoking article.
12. The method of claim 11 , wherein the smoking article is a cigarette.
13. A method for control-releasing flavor comprising:
(a) incorporating a supramolecular assembly into a smoking article; and
(b) releasing a flavorant from the supramolecular assembly,
wherein the supramolecular assembly comprises the flavorant and at least one selected from the group consisting of O,O′-dibenzoyl-(2R,3R)-tartaric acid, a hydrate thereof or a salt thereof, and ditoluoyl-(2R,3R)-tartaric acid, a hydrate thereof or a salt thereof.
14. The method of claim 13 , wherein the step (b) is carried out by heating the supramolecular assembly or contacting the supramolecular assembly with water at an elevated temperature.
15. The method of claim 14 , wherein the elevated temperature is about 80° C. or higher.