The Single-step Immobilization Of A Calix-[4]-arene Onto The Surface Of Silica
- Technology Benefits
- Lower preparation costHigher reactive site density
- Technology Application
- CatalysisSensingAdsorption
- Detailed Technology Description
- None
- Supplementary Information
- Patent Number: US6951690B2
Application Number: US2003394904A
Inventor: Katz, Alexander | Iglesia, Enrique | Notestein, Justin M.
Priority Date: 4 Apr 2002
Priority Number: US6951690B2
Application Date: 21 Mar 2003
Publication Date: 4 Oct 2005
IPC Current: B01J002032 | B01J003106 | B01J003116 | B01J003122 | C07C004550
US Class: 428447
Assignee Applicant: The Regents of the University of California
Title: Immobilized calixarenes and related compounds and process for their production
Usefulness: Immobilized calixarenes and related compounds and process for their production
Summary: The invention is used for immobilization of calixarene or a calixarene-related compound to a substrate, e.g. silica or other inorganic oxide substrate. The calixarene or calixarene-related compound is used in technological applications, e.g. catalysis, adsorption and sensing.
Novelty: Immobilization of calixarene or calixarene-related compound for catalysis by contacting metallic or non-metallic oxides that has been surface modified by reaction with polyhalides and/or polyalkoxides
- Industry
- Chemical/Material
- Sub Category
- Chemical/Material Application
- Application No.
- 6951690
- Others
-
Tech ID/UC Case
17153/2002-059-0
Related Cases
2002-059-0
- *Abstract
-
There has been much interest in using calixarenes as designable hosts for the specific adsorption of small molecule guests. Although protic solvents such as water and alcohols offer an optimum environment for host-guest interactions in this case, calixarenes have generally poor solubility in these solvents, and this has required the use of organic solvents in studies of adsorption, which result in relatively weak binding. Calixarene immobilization offers a route to circumvent host solubility limitations, but thus far it has necessitated the rather laborious synthesis of calixarene derivatives that contain reactive functional groups for polymerization to a surface (e.g. capable of sol-gel hydrolysis and condensation) or other type of surface binding (e.g. thiol or sulfide for anchoring on a gold surface). These groups are typically linked to the calixarene lower rim via flexible tethers, which act to decrease the conformational rigidity of the anchored site and limit the maximum attainable site density.
Researchers at the University of California, Berkeley have developed a novel one-step synthetic method for immobilizing calixarene compounds onto the surface of silica. The immobilization method developed at Berkeley provides a general strategy for anchoring calixarene monolayers onto a silicate glass in the highest site densities yet reported on a per gram of material basis.
It is expected that these materials will find widespread application in catalysis, adsorption, and sensing.
- *IP Issue Date
- Oct 4, 2005
- *Principal Investigator
-
Name: Enrique Iglesia
Department:
Name: Alexander Katz
Department:
Name: Justin Notestein
Department:
- Country/Region
- USA
