We show that the polycondensation of chiral sol-gel precursors can be efficiently followed up by optical rotation measurements. Three silanes were studied, namely, the hexaethoxysilane derivatives of l-threonine, l-isoleucine, and dimethyl-l-tartrate. Two main sol-gel polycondensation mechanisms were identified, namely, linear kinetics product growth and second-order cluster–cluster growth. Dynamic light scattering measurements are used to support the proposed mechanisms.
The polycondensation of chiral sol-gel precursors is efficiently followed up by optical rotation.
The chiral hexaethoxysilanes of L-threonine, L-isoleucine and dimethyl-L-tartrate, are studied.
Two sol-gel mechanisms were identified: linear-kinetics and second-order cluster-cluster growth.
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We thank Prof. Edit Tshuva and Prof. Raed Abu-Reziq for fruitful discussions.
Conflict of interest
The authors declare that they have no conflict of interest.
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Cohen, O., Gelman, D. & Avnir, D. Optical rotation kinetics study of the polycondensation of chiral sol-gel precursors. J Sol-Gel Sci Technol 90, 149–154 (2019). https://doi.org/10.1007/s10971-018-4858-9
- Chiral sol-gels
- Optical rotation
- Sol-gel precursors