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Rapid and Complete Surface Modification with Strain-Promoted Oxidation-Controlled Cyclooctyne-1,2-Quinone
Rickdeb Sen1, Jorge Escorihuela1, Floris van Delft1
1Laboratory of Organic Chemistry, Wageningen University and Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands.
Angewandte Chemie (International Ed. in English)
|February 16, 2017
Summary
Strain-promoted oxidation-controlled cyclooctyne-1,2-quinone cycloaddition (SPOCQ) achieved 100% conjugation efficiency between bicyclo[6.1.0]non-4-yne (BCN) and surface-bound quinones. Direct analysis in real time mass spectrometry (DART-MS) elucidated the immobilization kinetics and microenvironment effects.
Area of Science:
- Organic Chemistry
- Surface Chemistry
- Bioconjugation Chemistry
Background:
- Strain-promoted cycloaddition reactions are crucial for bioconjugation.
- Surface immobilization requires efficient and controllable conjugation methods.
- Understanding reaction kinetics in microenvironments is key for optimizing surface functionalization.
Purpose of the Study:
- To investigate the strain-promoted oxidation-controlled cyclooctyne-1,2-quinone cycloaddition (SPOCQ) reaction for surface immobilization.
- To determine the conjugation efficiency of functionalized bicyclo[6.1.0]non-4-yne (BCN) with surface-bound quinones.
- To analyze the kinetics and activation parameters of the immobilization process using DART-MS.
Main Methods:
- Utilized functionalized bicyclo[6.1.0]non-4-yne (BCN) as a dienophile.
- Employed surface-bound quinones as reaction partners.
- Monitored the reaction progress and kinetics using direct analysis in real time mass spectrometry (DART-MS).
Main Results:
- Achieved an unprecedented 100% conjugation efficiency in the SPOCQ reaction.
- Demonstrated the effectiveness of BCN in forming stable conjugates with surface-bound quinones.
- Obtained detailed kinetic data and activation parameters, highlighting microenvironment dependence.
Conclusions:
- SPOCQ represents a highly efficient method for surface functionalization and immobilization.
- DART-MS is a powerful tool for real-time monitoring and mechanistic studies of surface reactions.
- The findings provide a foundation for developing advanced surface modification strategies.
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