Manganese porphyrins incorporated in polydimethylsiloxane membranes: selective catalysts for the epoxidation of deactivated alkenes

Neys, Pef; Severeyns, An; Vankelecom, Ivo F.J.; Ceulemans, Erik; Dehaen, Wim; Jacobs, Pierre

doi:10.1016/s1381-1169(99)00185-5

Cited by 28 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Jacobs's group has been working on catalyst immobilization in poly(dimethylsiloxane) (PDMS) membranes. − PDMS membranes can be easily obtained by cross-linking vinyl-substituted dimethylsiloxane prepolymeric chains through hydrosilylation (Scheme ). Mechanical resistance, swelling, and porosity are some of the PDMS membrane properties that can be controlled in the polymerization process by selecting appropriately the substituted precursor chains that will end up in an adequate degree of cross-linking.…”

Section: 1 Salen−metal Complexes Embedded In or Filtered By Membranesmentioning

confidence: 99%

Chiral Salen Complexes: An Overview to Recoverable and Reusable Homogeneous and Heterogeneous Catalysts

2006

View full text Add to dashboard Cite

Section: 1 Salen−metal Complexes Embedded In or Filtered By Membranesmentioning

confidence: 99%

Chiral Salen Complexes: An Overview to Recoverable and Reusable Homogeneous and Heterogeneous Catalysts

2006

View full text Add to dashboard Cite

“…Embedded in PDMS, the ketone formation was completely absent in addition to a more than 20-fold increase in activity. This was attributed to the lowered mobility of the axial ligand in the more restrictive PDMS phase which results in a prolonged coordination to the active center and to the PDMS influence on better balanced concentrations of alkene, ligand, and peroxide around the metal center. , …”

Section: Nonchiral Tmcsmentioning

confidence: 99%

Polymeric Membranes in Catalytic Reactors

2002

View full text Add to dashboard Cite

“…The existing methods for controlling EOF in PDMS channels are focused on producing needed functional groups on the PDMS surface. It should be noted that doping additives into other polymers has been also used for the purpose of modifying conductivity, color, stability, etc. , For PDMS, there have been two such studies, the addition of a porphyrin for catalyzing epoxidation and a phospholipid for immobilizing proteins on the PDMS surface . To our knowledge, no previous work exists on modifying the properties of PDMS for the purpose of controlling EOF.…”

mentioning

confidence: 99%

Controlling Electroosmotic Flow in Poly(dimethylsiloxane) Separation Channels by Means of Prepolymer Additives

Luo

Zare

2006

Anal. Chem.

View full text Add to dashboard Cite

The electroosmotic flow (EOF) in a poly(dimethylsiloxane) (PDMS) separation channel can be altered and controlled by adding a carboxylic acid to the prepolymer prior to curing. When the prepolymer is doped with 0.5 wt % undecylenic acid (UDA), the electroosmotic mobility in a modified PDMS channel rises to (7.6 +/- 0.2) x 10(-4) cm(2) V(-1) s(-1) (in HEPES buffer at pH 8.5), which is nearly twice that in the native PDMS channel. Because this modification does not significantly change the hydrophobicity of the PDMS surface, it is possible to combine the modified PDMS with a dynamic coating of n-dodecyl beta-d-maltoside (DDM), which prevents protein sticking (see Huang, B.; Wu, H. K.; Kim, S.; Zare, R. N. Lab Chip 2005, 5, 1005-1007). The modified PDMS channel with a dynamic coating of DDM generates an electroosmotic mobility of (5.01 +/- 0.09) x 10(-4) cm(2) V(-1) s(-1), which shows excellent reproducibility both in successive runs and during storage in water. Combining this surface modification and the dynamic coating of DDM is an effective means for both providing stable EOF in the PDMS channels and preventing protein adsorption on the channel walls. To demonstrate these effects, we show that the electrophoretic separation of immunocomplexes in free solution can be readily accomplished in a microfluidic chip made of UDA-doped (0.5 wt %) PDMS with a dynamic coating of DDM.

show abstract

Manganese porphyrins incorporated in polydimethylsiloxane membranes: selective catalysts for the epoxidation of deactivated alkenes

Cited by 28 publications

References 5 publications

Chiral Salen Complexes: An Overview to Recoverable and Reusable Homogeneous and Heterogeneous Catalysts

Chiral Salen Complexes: An Overview to Recoverable and Reusable Homogeneous and Heterogeneous Catalysts

Polymeric Membranes in Catalytic Reactors

Controlling Electroosmotic Flow in Poly(dimethylsiloxane) Separation Channels by Means of Prepolymer Additives

Contact Info

Product

Resources

About