Conducting reactions in Leidenfrost-levitated droplets

Patent metadata

Field	Value
Publication number	US-10774044-B2
Application number	US-201715613520-A
Country	US
Kind code	B2
Filing date	Jun 5, 2017
Priority date	Jun 6, 2016
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

The invention generally relates to conducting reactions in Leidenfrost-levitated droplets.

First claim

What is claimed is:

1. A method for forming and collecting a reaction product, the method comprising:
conducting a reaction within a Leidenfrost-levitated droplet while maintaining a substantially constant volume of the Leidenfrost-levitated droplet, thereby forming a reaction product within the Leidenfrost-levitated droplet, wherein maintaining the substantially constant volume comprises introducing droplets of pure solvent or the reaction mixture to the Leidenfrost-levitated droplet and a rate at which the droplets of the pure solvent or reaction mixture are introduced to the Leidenfrost-levitated droplet is dependent on an evaporation rate of the Leidenfrost-levitated droplet; and
collecting the reaction product in the Leidenfrost-levitated droplet without evaporating the Leidenfrost-levitated droplet.

2. The method according to claim 1 , further comprising analyzing the reaction product.

3. The method according to claim 2 , wherein analyzing is by a mass spectrometry technique.

4. The method according to claim 1 , wherein the method further comprises conducting multiple reactions in multiple separate Leidenfrost-levitated droplets.

5. The method according to claim 4 , wherein the multiple separate Leidenfrost-levitated droplets are merged with each other.

6. The method according to claim 4 , wherein the multiple reactions are the same.

7. The method according to claim 4 , wherein the multiple reactions are different.

8. The method according to claim 1 , wherein the method is conducted without the use of surfactants.

9. A method for forming and collecting a reaction product, the method comprising:
introducing a first liquid droplet onto a heated surface that is at a temperate that is at or above a Leidenfrost point of the first liquid such that the first liquid droplet levitates on the heated surface, wherein the first liquid droplet comprises reagents for a reaction;
conducting a reaction in the first liquid droplet using the reagents in order to form a reaction product;
introducing one or more subsequent liquid droplets to the first liquid droplet on the heated surface such that the one or more subsequent liquid droplets merge with the first liquid droplet, wherein a rate at which the one or more subsequent liquid droplets are introduced to the first liquid droplet is dependent on an evaporation rate of the first liquid droplet; and
collecting the reaction product in the first liquid droplet without evaporating the first liquid droplet.

10. The method according to claim 9 , further comprising analyzing the reaction product.

11. The method according to claim 10 , wherein analyzing is by a mass spectrometry technique.

12. The method according to claim 9 , wherein the first liquid droplet is maintained at a substantially constant volume throughout the method.

13. The method according to claim 9 , wherein the one or more subsequent liquid droplets each comprise the reagents for the reaction.

14. The method according to claim 9 , wherein the method is conducted without the use of surfactants.

15. A method for forming and collecting a reaction product, the method comprising:
conducting a reaction between at least two reagents within a Leidenfrost-levitated droplet, in order to form a reaction product within the Leidenfrost-levitated droplet, wherein the method further comprises introducing one or more subsequent liquid droplets to the Leidenfrost-levitated droplet, wherein a rate at which the one or more subsequent liquid droplets are introduced to the Leidenfrost-levitated droplet is dependent on an evaporation rate of the Leidenfrost-levitated droplet; and
collecting the reaction product in the Leidenfrost-levitated droplet without evaporating the Leidenfrost-levitated droplet.

16. The method according to claim 15 , wherein the droplet reduces in volume as the reaction occurs.

17. The method according to claim 15 , wherein a rate of the reaction is accelerated as compared to a rate of the reaction conducted outside of the Leidenfrost-levitated droplet.

Assignees

• Purdue Research Foundation

Inventors

• Cooks Robert Graham
• Pulliam Christopher
• Bain Ryan M

Classifications

• C07C45/72

  by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups · CPC title

• C07J41/0005

  the nitrogen atom being directly linked to the cyclopenta(a)hydro phenanthrene skeleton · CPC title

• C07D213/04 Primary

  having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom · CPC title

• C07D209/40

  Nitrogen atoms, not forming part of a nitro radical, e.g. isatin semicarbazone · CPC title

• C07C49/747

  containing six-membered aromatic rings · CPC title